US5433180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with supercharger
Assignee: Mazda Motor Corp
•
Filing: 1994-10-18
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Granted: 1995-07-18
•
Expires: 2014-10-18
Abstract
Abstract An internal combustion engine with a supercharger with a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, which has a bore size of the cylinder ranging from approximately 43 mm to 67 mm; a volume of a single chamber of the cylinder ranging from approximately 110 cc to 400 cc; a ratio of a stroke of the piston to the bore size of the cylinder being larger than 1; and a compression ratio of the engine being 9 or larger.
Inventors
- 👤 Mitsuo Hitomi
- 👤 Shunji Masuda
- 👤 Toshihiko Hattori
- 👤 Kenji Kashiyama
- 👤 Junsou Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:20
CPC Classifications
F; F02; F02B; F02B47/00; F02B47/04; F02B47/08; F02B1/00; F02B1/02; F02B1/04; F02B29/00; F02B29/04; F02B29/0406; F02B29/0418; F02B3/00; F02B3/06; F02B31/00; F02B31/08; F02B31/085; F02B31/087; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02D; F02D13/00; F02D13/02; F02D13/0203; F02D13/0215; F02D13/0219; F02D13/0223; F02D13/0234; F02D13/0238; F02D13/0261; F02D13/0276; F02D21/00; F02D21/06; F02D21/08; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F1/4221; F02M; F02M26/00; F02M26/02; F02M26/03; F02M26/13; F02M26/14; F02M26/15; F02M26/22; F02M26/23; F02M26/35; F02B2075/1804; F02B2075/1824; F02B2275/00; F02B2275/08; F02B2275/18; F02B2275/48; F02D2013/0292; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
100 words
A four cycle internal combustion engine with a supercharger, said engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein: a bore size of the cylinder ranges from approximately 43 mm to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; and the supercharger is a mechanically driven supercharger.
Claim 2
Dependent Claim
100 words
A four cycle internal combustion engine with a supercharger, said engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein: a bore size of the cylinder ranges from approximately 43 mm to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; and the supercharger is a mechanically driven supercharger.
Claim 3
Dependent Claim
26 words
A supercharged internal combustion engine as set forth in claim 1, further comprising a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 4
Dependent Claim
33 words
A supercharged internal combustion engine as set forth in claim 1, wherein when a mean intake air mach number is 0.5, a number of rotations of the engine is at least 5,000 rpm.
Claim 5
Dependent Claim
22 words
A supercharged internal combustion engine as set forth in claim 1, wherein a compression ratio of the engine is at least 9.
Claim 6
Dependent Claim
36 words
A supercharged internal combustion engine as set forth in claim 1, further comprising an intake valve and a valve timing change-over mechanism, said valve timing change-over mechanism changing a timing of when the intake valve closes.
Claim 7
Dependent Claim
164 words
A supercharged internal combustion engine as set forth in claim 5, wherein: a running region where the engine is running is divided into three running regions: a first running region wherein the number of the engine is low and the load of the engine is low; a second running region wherein the number of rotation of the engine is smaller than a predetermined value, other than the first running region; and a third running region wherein the number of rotation of the engine is equal to or larger than the predetermined value; wherein, in the first running region, the timing of closing the intake valve is delayed later than in any other running region; wherein, in the second running region, the timing of closing the intake valve is earlier than in the first running region; and wherein, in the third running region, the timing of closing the intake valve is earlier than the timing of closing the intake valve in the first running region.
Claim 8
Dependent Claim
48 words
A supercharged internal combustion engine as set forth in claim 6, wherein: the timing of closing the intake valve in at least one of the second running region and the third running region are set as a crank angle of approximately 70 degrees after the bottom dead center.
Claim 9
Dependent Claim
41 words
A supercharged internal combustion engine as set forth in claim 7, wherein: the overlap of the open state of the intake valve with the open state of the exhaust valve in the third running region is set to approximately 80 degrees.
Claim 10
Dependent Claim
41 words
A supercharged internal combustion engine as set forth in claim 6, wherein: the overlap of the open state of the intake valve with the open state of the exhaust valve in the third running region is set to approximately 80 degrees.
Claim 11
Dependent Claim
24 words
A supercharged internal combustion engine as set forth in claim 1, further comprising: an EGR means for recirculating exhaust gases to a combustion chamber.
Claim 12
Dependent Claim
58 words
A supercharged internal combustion engine as set forth in claim 10, wherein: the EGR means comprises a first EGR means and a second EGR means; the first EGR means for recirculating exhaust gases having a higher temperature to the combustion chamber; and the second EGR means for recirculating exhaust gases having a lower temperature to the combustion chamber.
Claim 13
Dependent Claim
30 words
A supercharged internal combustion engine as set forth in claim 11, wherein: the exhaust gases are recirculated only by the first EGR means during a low load on the engine.
Claim 14
Dependent Claim
30 words
A supercharged internal combustion engine as set forth in claim 12, wherein: the exhaust gases are recirculated only by the second EGR means during a high load on the engine.
Claim 15
Dependent Claim
74 words
A supercharged internal combustion engine as set forth in claim 1, wherein: one cylinder has a plurality of intake ports and a plurality of exhaust ports; a discrete intake passage is communicated with each of the intake ports over a predetermined length from the combustion chamber; and a portion of the discrete intake passage is provided with a shutter valve to be opened or closed in accordance with a running state of the engine.
Claim 16
Dependent Claim
48 words
A supercharged internal combustion engine as set forth in claim 14, wherein the shutter valve is adapted to be closed in a region wherein the number of rotations of the engine is low and opened in a region wherein the number of rotations of the engine is high.
Claim 17
Dependent Claim
69 words
A supercharged internal combustion engine as set forth in claim 1, further comprising a sub-chamber communicated with the combustion chamber through a sub-chamber port arranged to be opened and closed with a sub-chamber valve; wherein the timing of opening the sub-chamber valve is set to be in the process of a stroke of compression and the timing of closing the sub-chamber valve is set before the timing of ignition.
Claim 18
Dependent Claim
33 words
A supercharged internal combustion engine as set forth in claim 1, wherein the engine is run in an air-fuel ratio leaner than a stoichiometric air-fuel ratio at least in a predetermined running region.
Claim 19
Dependent Claim
48 words
A supercharged internal combustion engine as set forth in claim 1, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
Claim 20
Dependent Claim
122 words
A four cycle internal combustion engine with a supercharger, said engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein: a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a number of rotations of the engine when a mean speed of the piston is 20 m/s is larger than a number of rotations of the engine when a mean intake air mach number is 0.5; and the supercharger is a mechanically driven supercharger.
Claim 21
Dependent Claim
122 words
A four cycle internal combustion engine with a supercharger, said engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein: a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a number of rotations of the engine when a mean speed of the piston is 20 m/s is larger than a number of rotations of the engine when a mean intake air mach number is 0.5; and the supercharger is a mechanically driven supercharger.
Claim 22
Dependent Claim
56 words
A supercharged internal combustion engine as claimed in claim 19, wherein: the difference obtained by subtracting the number of rotations of the engine when the mean speed of the piston is 20 m/s from the number of rotations of the engine when the mean intake air mach number is 0.5, is not greater than 2,000 rpm.
Claim 23
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 20, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 24
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 20, wherein a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 25
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 19, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 26
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 19, wherein a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 27
Dependent Claim
47 words
A supercharged internal combustion engine as claimed in claim 19, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
Claim 28
Dependent Claim
102 words
A four cycle internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein; a bore size of the cylinder ranges from approximately 43 to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; and a compression ratio of the engine is at least 9.
Claim 29
Dependent Claim
102 words
A four cycle internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein; a bore size of the cylinder ranges from approximately 43 to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; and a compression ratio of the engine is at least 9.
Claim 30
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 26, wherein a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 31
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 26, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 32
Dependent Claim
47 words
A supercharged internal combustion engine as claimed in claim 26, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
Claim 33
Dependent Claim
125 words
A four cycle internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a compression ratio of the engine is at least 9; and a number of rotations of the engine when a mean speed of the piston is 20 m/s is larger than a number of rotations of the engine when a mean intake air mach number is 0.5.
Claim 34
Dependent Claim
125 words
A four cycle internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, said engine including a cylinder head mounted at one end of said cylinder and an intake valve mounted in an intake port of said cylinder head, wherein; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a compression ratio of the engine is at least 9; and a number of rotations of the engine when a mean speed of the piston is 20 m/s is larger than a number of rotations of the engine when a mean intake air mach number is 0.5.
Claim 35
Dependent Claim
56 words
A supercharged internal combustion engine as claimed in claim 30, wherein: the difference obtained by subtracting the number of rotations of the engine when the mean speed of the piston is 20 m/s from the number of rotations of the engine when the mean intake air mach number is 0.5, is not greater than 2,000 rpm.
Claim 36
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 31, wherein; when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 37
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 31, wherein a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 38
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 30, wherein; when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 39
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 30, wherein a volume of the cylinder ranges from approximately 110 cc to 400 cc.
Claim 40
Dependent Claim
47 words
A supercharged internal combustion engine as claimed in claim 30, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
Claim 41
Dependent Claim
84 words
An internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, the engine having two intake valves and two exhaust valves per cylinder wherein: a bore size of the cylinder ranges from approximately 50 mm to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is at least 1; and a compression ratio of the engine is at least 9.
Claim 42
Dependent Claim
84 words
An internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, the engine having two intake valves and two exhaust valves per cylinder wherein: a bore size of the cylinder ranges from approximately 50 mm to 67 mm; a ratio of a stroke of the piston to the bore size of the cylinder is at least 1; and a compression ratio of the engine is at least 9.
Claim 43
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 37, wherein a volume of the cylinder ranges from approximately 150 cc to 400 cc.
Claim 44
Dependent Claim
56 words
A supercharged internal combustion engine as claimed in claim 37, wherein: the difference obtained by subtracting the number of rotations of the engine when the mean speed of the piston is 20 m/s from the number of rotations of the engine when the mean intake air mach number is 0.5, is not greater than 2,000 rpm.
Claim 45
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 39, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 46
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 37, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 47
Dependent Claim
47 words
A supercharged internal combustion engine as claimed in claim 37, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
Claim 48
Dependent Claim
86 words
An internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, the engine having three intake valves and two exhaust valves per cylinder wherein: a bore size of the cylinder ranges from approximately 43 mm to 49.5 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a compression ratio of the engine is at least 9.
Claim 49
Dependent Claim
86 words
An internal combustion engine with a supercharger, the engine including a piston arranged to be inserted into a cylinder so as to move in a reciprocating way, the engine having three intake valves and two exhaust valves per cylinder wherein: a bore size of the cylinder ranges from approximately 43 mm to 49.5 mm; a ratio of a stroke of the piston to the bore size of the cylinder is equal to or larger than 1; a compression ratio of the engine is at least 9.
Claim 50
Dependent Claim
24 words
A supercharged internal combustion engine as claimed in claim 43, wherein a volume of the cylinder ranges from approximately 110 cc to 295 cc.
Claim 51
Dependent Claim
56 words
A supercharged internal combustion engine as claimed in claim 43, wherein: the difference obtained by subtracting the number of rotations of the engine when the mean speed of the piston is 20 m/s from the number of rotations of the engine when the mean intake air mach number is 0.5, is not greater than 2,000 rpm.
Claim 52
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 45, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 53
Dependent Claim
32 words
A supercharged internal combustion engine as claimed in claim 43, wherein: when the mean intake air mach number is 0.5, the number of rotations of the engine is at least 5,000 rpm.
Claim 54
Dependent Claim
47 words
A supercharged internal combustion engine as claimed in claim 42, wherein a displacement of the engine satisfies the following formula: W=543.3 [V/1000].sup.2 -508.8 [V/1000]+815 wherein W is the weight of the body of the vehicle in kg and V is the displacement of the engine in cc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |