Patent US4958606A successfully refreshed from Google Patents.
US4958606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged engine
Assignee: Mazda Motor Corp
•
Filing: 1987-11-27
•
Granted: 1990-09-25
•
Expires: 2007-11-27
Abstract
Abstract A supercharged engine has a geometric compression ratio of more than 8.5, and engine specifications are set to establish a relation, Y≧-1.75X+10, in which an intake port closing timing Y is expressed by a crank angle after the piston reaches BDC and an overlapping angle X is expressed by a crank angle for an overlapping time period during which the intake valve and exhaust valve are both open.
Inventors
- 👤 Mitsuo Hitomi
- 👤 Junso Sasaki
- 👤 Akira Takai
- 👤 Kazuaki Umezono
- 👤 Fumio Hinatase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
F; F02; F02B; F02B33/00; F02D; F02D13/00; F02D13/02; F02D13/0223; F02D13/0226; F02D13/023; F02B29/00; F02B29/08; F02D13/0261; F02D13/0269; F02D15/00; F02D15/04; F02D23/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
356 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an engine output means operatively connected to said crank for generating an engine output from the rotation of said crank; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a mechanical supercharger operatively disposed in said intake passage and connected to said engine output means so as to be driven by the engine output for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧-1.75X+10 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle take between when the intake valve is open and when the exhaust valve is closed.
Claim 2
Dependent Claim
356 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an engine output means operatively connected to said crank for generating an engine output from the rotation of said crank; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a mechanical supercharger operatively disposed in said intake passage and connected to said engine output means so as to be driven by the engine output for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧-1.75X+10 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle take between when the intake valve is open and when the exhaust valve is closed.
Claim 3
Dependent Claim
19 words
A supercharged engine as claimed in claim 1, wherein the engine has an effective compression ratio greater than 6.5.
Claim 4
Dependent Claim
58 words
A supercharged engine as claimed in claim 1, wherein the valve timing can be operatively established to further satisfy the equation Y>Z wherein Z is the timing of the opening of said exhaust port means as represented by the crank angle take between when said exhaust valve opens and when the piston is at the dead center position.
Claim 5
Dependent Claim
90 words
A supercharged engine as claimed in claim 1, wherein an independent air passage extends between said intake port means and the intake passage in which said mechanical supercharger is operatively disposed, and further comprising a throttle valve disposed in said independent air passage, an actuator operatively connected to said throttle valve for opening and closing said throttle valve, and control means operatively connected to said actuator for controller said actuator to close said throttle valve when the engine is operating under a relatively light load while at a low speed.
Claim 6
Dependent Claim
10 words
A supercharged engine as claimed in claim 1, wherein X≦40°.
Claim 7
Dependent Claim
76 words
A supercharged engine as claimed in claim 1, and further comprising variable overlap means for effectively changing said overlap angle X from a first overlap angle satisfying said equation and a second overlap angle less than said first overlap angle, and control means operatively connected to said variable overlap means for controlling said overlap means to establish said first overlap angle when the engine is operating under a relatively high load while at a high speed.
Claim 8
Dependent Claim
88 words
A supercharged engine as claimed in claim 1, and further comprising exhaust gas reducing means for suppressing the amount of exhaust gas flowing into said combustion chamber as the charges of intake air are supplied to said combustion chamber when the engine is operating under a light load including idling while at a low speed as compared to the amount of exhaust gas flowing into said combustion chamber as the charges of air are supplied to said combustion chamber when the engine is operating at a high speed.
Claim 9
Dependent Claim
31 words
A supercharged engine as claimed in claim 7, wherein said exhaust gas reducing means suppresses the amounts of exhaust gas flowing into said combustion chamber by effectively reducing said overlap angle.
Claim 10
Dependent Claim
29 words
A supercharged engine as claimed in claim 8, wherein said exhaust gas reducing means effectively reduces said overlap angle by delaying the effective opening of said intake port means.
Claim 11
Dependent Claim
56 words
A supercharged engine as claimed in claim 7, and further comprising a first throttle valve disposed in said intake passage, and an independent air passage extending between and open to said intake passage and said intake port means, and wherein said exhaust gas reducing means comprises a second throttle valve disposed in said independent air passage.
Claim 12
Dependent Claim
19 words
A supercharged engine as claimed in claim 7, wherein said light load is 10% of the maximum engine load.
Claim 13
Dependent Claim
140 words
A supercharged engine as claimed in claim 1, and further comprising variable valve timing means for changing said timing of the closing of said intake port means from a first intake port means closing timing which satisfies said equation to a second intake port means closing timing in which said intake port means is effectively closed earlier in the engine cycle than when said first intake port means closing timing is established, and control means operatively connected to said variable valve timing means for controlling said variable valve timing means to establish said first intake port means closing timing whenever the engine is operating at a high speed, and for controlling said variable valve timing means to establish said second intake port means closing timing when said engine is operating under a relatively high load while at a low speed.
Claim 14
Dependent Claim
33 words
A supercharged engine as claimed in claim 12, wherein said control means controls said variable valve timing means to establish said second intake port mans closing timing whenever the engine is initially accelerating.
Claim 15
Dependent Claim
41 words
A supercharged engine as claimed in claim 12, wherein said control means controls said variable valve timing means to establish said second intake port means closing timing when the engine is operating under a light load while at a low speed.
Claim 16
Dependent Claim
19 words
A supercharged engine as claimed in claim 14, wherein said light load is 10% of the maximum engine load.
Claim 17
Dependent Claim
24 words
A supercharged engine as claimed in claim 1, wherein said valve timing satisfies said equation whenever the engine is operating at a high speed.
Claim 18
Dependent Claim
10 words
A supercharged engine as claimed in claim 1, where X≧-40°.
Claim 19
Dependent Claim
345 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port mans open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valve being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equations Y≧50° Y≧-1.75X+10 wherein X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed, and Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed.
Claim 20
Dependent Claim
345 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port mans open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valve being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equations Y≧50° Y≧-1.75X+10 wherein X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed, and Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed.
Claim 21
Dependent Claim
10 words
A supercharged engine as claimed in claim 18, wherein X≦40°.
Claim 22
Dependent Claim
430 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; variable valve timing means for changing said timing of the closing of said intake port means from a first intake port means closing timing which satisfies said equation to a second intake port means closing timing in which said intake port means is effectively closed earlier in the engine cycle than when said first intake port means closing timing is established; and control means operatively connected to said variable valve timing means for controlling said variable valve timing means to establish said first intake port means closing timing whenever the engine is operating at a high speed, and for controlling said variable valve timing means to establish said second intake port means closing timing when said engine is operating under a relatively high load while at a low speed.
Claim 23
Dependent Claim
430 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; variable valve timing means for changing said timing of the closing of said intake port means from a first intake port means closing timing which satisfies said equation to a second intake port means closing timing in which said intake port means is effectively closed earlier in the engine cycle than when said first intake port means closing timing is established; and control means operatively connected to said variable valve timing means for controlling said variable valve timing means to establish said first intake port means closing timing whenever the engine is operating at a high speed, and for controlling said variable valve timing means to establish said second intake port means closing timing when said engine is operating under a relatively high load while at a low speed.
Claim 24
Dependent Claim
379 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; and exhaust gas reducing means for suppressing the amount of exhaust gas flowing into said combustion chamber as the charges of intake air are supplied to said combustion chamber when the engine is operating under a light load including idling while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air are supplied to said combustion chamber when the engine is operating at a high speed.
Claim 25
Dependent Claim
379 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; and exhaust gas reducing means for suppressing the amount of exhaust gas flowing into said combustion chamber as the charges of intake air are supplied to said combustion chamber when the engine is operating under a light load including idling while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air are supplied to said combustion chamber when the engine is operating at a high speed.
Claim 26
Dependent Claim
31 words
A supercharged engine as claimed in claim 21, wherein said exhaust gas reducing means suppresses the amount of exhaust gas flowing into said combustion chamber by effectively reducing said overlap angle.
Claim 27
Dependent Claim
29 words
A supercharged engine as claimed in claim 22, wherein said exhaust gas reducing means effectively reduces said overlap angle by delaying the effective opening of said intake port means.
Claim 28
Dependent Claim
20 words
A supercharged engine as claimed in claim 21, wherein said light load is 10 % of the maxium engine load.
Claim 29
Dependent Claim
356 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said pistion and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an engine output means operatively connected to said crank for generating an engine output from the rotation of said crank; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a mechanical supercharger operatively disposed in said intake passage and connected to said engine output means so as to be driven by the engine output for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 0 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧-1.75X+100 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed.
Claim 30
Dependent Claim
356 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said pistion and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an engine output means operatively connected to said crank for generating an engine output from the rotation of said crank; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a mechanical supercharger operatively disposed in said intake passage and connected to said engine output means so as to be driven by the engine output for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 0 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧-1.75X+100 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed.
Claim 31
Dependent Claim
19 words
A supercharged engine as claimed in claim 25, wherein the engine has an effective compression ratio greater than 6.5.
Claim 32
Dependent Claim
58 words
A supercharged engine as claimed in claim 25, wherein the valve timing can be operatively established to further satisfy the equation Y>Z wherein Z is the timing of the opening of said exhaust port means as represented by the crank angle taken between when said exhaust valve opens and when the piston is at the dead center position.
Claim 33
Dependent Claim
10 words
A supercharged engine as claimed in claim 25, wherein X≦80°.
Claim 34
Dependent Claim
24 words
A supercharged engine as claimed in claim 25, wherein said valve timing satisfies said equation whenever the engine is operating at a high speed.
Claim 35
Dependent Claim
10 words
A supercharged engine as claimed in claim 25, wherein Y≧70°.
Claim 36
Dependent Claim
10 words
A supercharged engine as claimed in claim 25, wherein X≧0°.
Claim 37
Dependent Claim
345 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equations Y≧50° Y≧-1.75X+100 wherein X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed, and Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed.
Claim 38
Dependent Claim
345 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equations Y≧50° Y≧-1.75X+100 wherein X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed, and Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed.
Claim 39
Dependent Claim
10 words
A supercharged engine as claimed in claim 22, wherein X≦80°.
Claim 40
Dependent Claim
430 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; variable valve timing means for changing said timing of the closing of said intake port means from a first intake port means closing timing which satisfies said equation to a second intake port means closing timing in which said intake port means is effectively closed earlier in the engine cycle than when said first intake port means closing time is established; and control means operatively connected to said variable valve timing means for controlling said variable valve timing means to establish said first intake port means closing timing whenever the engine is operating at a high speed, and for controlling said variable valve timing means to establish said second intake port means closing timing when said engine is operating under a relatively high load while at a low speed.
Claim 41
Dependent Claim
430 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; variable valve timing means for changing said timing of the closing of said intake port means from a first intake port means closing timing which satisfies said equation to a second intake port means closing timing in which said intake port means is effectively closed earlier in the engine cycle than when said first intake port means closing time is established; and control means operatively connected to said variable valve timing means for controlling said variable valve timing means to establish said first intake port means closing timing whenever the engine is operating at a high speed, and for controlling said variable valve timing means to establish said second intake port means closing timing when said engine is operating under a relatively high load while at a low speed.
Claim 42
Dependent Claim
379 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; and exhaust gas reducing means for suppressing the amount of exhaust gas flowing into said combustion chamber as the charges of intake air are supplied to said combustion chamber when the engine is operating under a light load including idling while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air of supplied to said combustion chamber when the engine is operating at a high speed.
Claim 43
Dependent Claim
379 words
A supercharged engine comprising: a cylinder; a piston slidably received in said cylinder and reciprocatingly movable therein, said piston and said cylinder defining a combustion chamber therebetween, the engine having a geometric compression ratio of at least 8.5; a crank rotatably mounted in the engine and operatively connected to said piston, said crank limiting reciprocal movement of said piston within said cylinder between a top dead center position and a bottom dead center position, and said crank rotating as said piston reciprocates in said cylinder; an intake port means open to said combustion chamber, and through which charges of intake air pass to said combustion chamber; an intake passage open to said intake port means; a turbocharger and an intake air passage open to said turbocharger and said intake port means for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means; cooling means disposed in said intake air passage for cooling charges of air pressurized by said supercharger; an intake valve operatively disposed in said intake port means for opening and closing to open and close said intake port means; an exhaust port means open to said combustion chamber and through which exhaust gases generated in said chamber are discharged therefrom; an exhaust valve operatively disposed in said exhaust port means for opening and closing to open and close said exhaust port means; the opening and closing of said valves being based on a valve lift of 1 mm, and the engine having a valve timing which can be operatively established to satisfy the equation Y≧50° wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed; and exhaust gas reducing means for suppressing the amount of exhaust gas flowing into said combustion chamber as the charges of intake air are supplied to said combustion chamber when the engine is operating under a light load including idling while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air of supplied to said combustion chamber when the engine is operating at a high speed.
Claim 44
Dependent Claim
31 words
A supercharged engine as claimed in claim 35, wherein said exhaust gas reducing means suppresses the amounts of exhaust gas flowing into said combustion chamber by effectively reducing said overlap angle.
Claim 45
Dependent Claim
29 words
A supercharged engine as claimed in claim 36, wherein said exhaust gas reducing means effectively reduces said overlap angle by delaying the effective opening of said intake port means.
Claim 46
Dependent Claim
19 words
A supercharged engine as claimed in claim 35, wherein said light load is 10% of the maximum engine load.
Claim 47
Independent Claim
439 words
A method of improving operational characteristics in a supercharged engine having a cylinder, a piston slidably received in the cylinder and reciprocatingly movable therein, the piston and the cylinder defining a combustion chamber therebetween, a crank rotatably mounted in the engine and operatively connected to the piston, the crank limiting reciprocal movement of the piston within the cylinder between a top dead center position and bottom dean center position, and the crank rotating as the piston reciprocates in the cylinder, an engine output means operatively connected to said crank for operating an engine output from the rotation of said crank, an intake port means open to the combustion chamber and through which charges of intake air pass to the combustion chamber, an intake passage open to the intake port means, a mechanical supercharger operatively disposed in the intake air passage for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means, and an intake valve operatively disposed in the intake port means for opening and closing to open and close the intake port means, an exhaust port means open to the combustion chamber and through which exhaust gases generated in the chamber are discharged therefrom, an exhaust valve operatively disposed in the exhaust port means for opening and closing to open and close the exhaust port means, and the opening and closing of said valves being based on a valve lift of 1 mm, said method comprising: operatively establishing the valve timing to satisfy the equation Y≧-1.75X+10 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed; providing a geometric compression ratio of the engine of at least 8.5; driving the mechanical supercharger off of the engine output to pressurize the charges of the intake air supplied to the combustion chamber; and suppressing the amount of exhaust gas flowing into the combustion chamber as the charges of intake air are supplied to the combustion chamber when the engine is operating under an extra-light load while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air are supplied to said combustion chamber when the engine is operating at a high speed.
Claim 48
Independent Claim
439 words
A method of improving operational characteristics in a supercharged engine having a cylinder, a piston slidably received in the cylinder and reciprocatingly movable therein, the piston and the cylinder defining a combustion chamber therebetween, a crank rotatably mounted in the engine and operatively connected to the piston, the crank limiting reciprocal movement of the piston within the cylinder between a top dead center position and bottom dean center position, and the crank rotating as the piston reciprocates in the cylinder, an engine output means operatively connected to said crank for operating an engine output from the rotation of said crank, an intake port means open to the combustion chamber and through which charges of intake air pass to the combustion chamber, an intake passage open to the intake port means, a mechanical supercharger operatively disposed in the intake air passage for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means, and an intake valve operatively disposed in the intake port means for opening and closing to open and close the intake port means, an exhaust port means open to the combustion chamber and through which exhaust gases generated in the chamber are discharged therefrom, an exhaust valve operatively disposed in the exhaust port means for opening and closing to open and close the exhaust port means, and the opening and closing of said valves being based on a valve lift of 1 mm, said method comprising: operatively establishing the valve timing to satisfy the equation Y≧-1.75X+10 wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed; providing a geometric compression ratio of the engine of at least 8.5; driving the mechanical supercharger off of the engine output to pressurize the charges of the intake air supplied to the combustion chamber; and suppressing the amount of exhaust gas flowing into the combustion chamber as the charges of intake air are supplied to the combustion chamber when the engine is operating under an extra-light load while at a low speed with respect to the amount of exhaust gas flowing into said combustion chamber as the charges of air are supplied to said combustion chamber when the engine is operating at a high speed.
Claim 49
Independent Claim
377 words
A method of improving operational characteristics is a supercharged engine having a cylinder, a piston slidably received in the cylinder and reciprocatingly movable therein, the piston and the cylinder defining a combustion chamber therebetween, a crank rotatably mounted in the engine and operatively connected to the piston, the crank limiting reciprocal movement of the piston within the cylinder between a top dead center position and bottom dead center position, and the crank rotating as the piston reciprocates in the cylinder, an engine output means operatively connected to said crank for operating an engine output from the rotation of said crank, an intake port means open to the combustion chamber and through which charges of intake air pass to the combustion chamber, an intake passage open to the intake port means, a mechanical supercharger operatively disposed in the intake air passage for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means, and an intake valve operatively disposed in the intake port means for opening and closing to open and close the intake port means, an exhaust port open to the combustion chamber and through which exhaust gases generated in the chamber are discharged therefrom, an exhaust valve operatively disposed in the exhaust port means for opening and closing to open and close the exhaust port means, and the opening and closing of the valves being based on a valve lift of 1 mm, said method comprising: operatively establishing the valve timing to satisfy the equation Y≧-1.75X+10 wherein the engine operates at a high speed, and wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed; providing a geometric compression ratio of the engine of at least 8.5; and driving the mechanical supercharger off of the engine output to pressurize the charges of the intake air supplied to the combustion chamber.
Claim 50
Independent Claim
377 words
A method of improving operational characteristics is a supercharged engine having a cylinder, a piston slidably received in the cylinder and reciprocatingly movable therein, the piston and the cylinder defining a combustion chamber therebetween, a crank rotatably mounted in the engine and operatively connected to the piston, the crank limiting reciprocal movement of the piston within the cylinder between a top dead center position and bottom dead center position, and the crank rotating as the piston reciprocates in the cylinder, an engine output means operatively connected to said crank for operating an engine output from the rotation of said crank, an intake port means open to the combustion chamber and through which charges of intake air pass to the combustion chamber, an intake passage open to the intake port means, a mechanical supercharger operatively disposed in the intake air passage for pressurizing the charges of intake air supplied to said combustion chamber through said intake port means, and an intake valve operatively disposed in the intake port means for opening and closing to open and close the intake port means, an exhaust port open to the combustion chamber and through which exhaust gases generated in the chamber are discharged therefrom, an exhaust valve operatively disposed in the exhaust port means for opening and closing to open and close the exhaust port means, and the opening and closing of the valves being based on a valve lift of 1 mm, said method comprising: operatively establishing the valve timing to satisfy the equation Y≧-1.75X+10 wherein the engine operates at a high speed, and wherein Y is the timing of the closing of said intake port means as represented by the crank angle taken between when the piston is at the bottom dead center position and when the intake valve is closed, and X is an overlap angle representing a time period during which both said intake valve and said exhaust valve are open and equal to the crank angle taken between when the intake valve is open and when the exhaust valve is closed; providing a geometric compression ratio of the engine of at least 8.5; and driving the mechanical supercharger off of the engine output to pressurize the charges of the intake air supplied to the combustion chamber.
References Cited (Backward Citations)
US2266077A
Cited
US3015934A
Cited
US2997991A
Cited
US4106471A
Cited
US4327676A
Cited
JPS5810112A
Cited
US4539815A
Cited
JPS59172228A
Cited
JPS6119933A
Cited
JPS61187543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |