US5775289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct cylinder fuel injected engine
Assignee: Yamaha Motor Co Ltd
•
Filing: 1996-05-13
•
Granted: 1998-07-07
•
Expires: 2016-05-13
Abstract
Abstract A number of embodiments of engines having direct cylinder injection wherein the fuel injector is positioned so as to be shrouded by the piston during at least a portion of its stroke. This permits the use of less expensive and lower pressure fuel injection nozzles. The spray pattern of the injector is chosen so that some fuel is sprayed toward the spark plug to provide stratification, but the major portion is directed toward the head of the piston so to as insure a homogeneous mixture when operating at high speed, high load conditions.
Inventors
- 👤 Takeo Yoshida
- 👤 Takahiro Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/18; F02M61/1806; F02M61/1826; F01; F01N; F01N13/00; F01N13/004; F01N13/08; F01N13/10; F01N13/12; F01N3/00; F01N3/02; F01N3/04; F01N3/043; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02B23/105; F02B25/00; F02B25/14; F02B61/00; F02B61/02; F02B61/04; F02B61/045; F02B75/00; F02B75/16; F02B75/18; F02B75/20; F02D; F02D41/00; F02D41/30; F02D41/3094; F02D41/32; F02D41/34; F02D41/345; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/0678; F02M51/0682; F02M53/00; F02M53/04; F02M61/14; F02M69/00; F02M69/04; F02M69/042; F02M69/045; F02M69/10; F02M69/46; F02M69/462; F01N2590/00; F01N2590/02; F01N2590/021; F02B2023/103; F02B2023/108; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B2075/1804; F02B2075/1812; F02B2275/00; F02B2275/18; F02B33/00; F02B33/02; F02B33/04; F02D41/38; F02D2041/389; F02D2200/00; F02D2200/02; F02D2200/10; F02D2200/101; F02D2400/00; F02D2400/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
207 words
A direct cylinder injected internal combustion engine comprised of a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and cylinder head a variable volume combustion chamber, said piston having a piston head facing said cylinder head and at least an upper ring groove extending circumferentially therearound and receiving a piston ring, the distance between said piston at said BDC position and the upper peripheral edge of said cylinder bore being expressed as the dimension L, the distance between the lower end of said ring groove and said upper peripheral edge of said cylinder head when said piston is at said TDC position being expressed by the dimension RS, a fuel injector supported within said cylinder block and having a nozzle having a spray axis extending transversely into said cylinder bore, said spray axis laying at a distance A from said cylinder bore upper peripheral edge and such that said spray axis is covered by said piston during at least a portion of its stroke, and the following relationship is true: RS<A<0.3L.
Claim 2
Dependent Claim
207 words
A direct cylinder injected internal combustion engine comprised of a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and cylinder head a variable volume combustion chamber, said piston having a piston head facing said cylinder head and at least an upper ring groove extending circumferentially therearound and receiving a piston ring, the distance between said piston at said BDC position and the upper peripheral edge of said cylinder bore being expressed as the dimension L, the distance between the lower end of said ring groove and said upper peripheral edge of said cylinder head when said piston is at said TDC position being expressed by the dimension RS, a fuel injector supported within said cylinder block and having a nozzle having a spray axis extending transversely into said cylinder bore, said spray axis laying at a distance A from said cylinder bore upper peripheral edge and such that said spray axis is covered by said piston during at least a portion of its stroke, and the following relationship is true: RS<A<0.3L.
Claim 3
Dependent Claim
56 words
A direct cylinder injected internal combustion engine as set forth in claim 1 wherein the engine operates on a two cycle, crankcase compression principle and further including at least one scavenge passage opening into said cylinder bore through a scavenge port and at least one exhaust passage opening into said cylinder bore through an exhaust port.
Claim 4
Dependent Claim
43 words
A direct cylinder injected internal combustion engine as set forth in claim 2 wherein the upper peripheral edge of the exhaust port is spaced a distance ES from the upper peripheral edge of the cylinder bore and wherein the following relationship exists: 0.35ES<A<0.065ES.
Claim 5
Dependent Claim
37 words
A direct cylinder injected internal combustion engine as set forth in claim 2 wherein the fuel injector is disposed between the upper peripheral edge of the scavenge port and the upper peripheral edge of the cylinder bore.
Claim 6
Dependent Claim
25 words
A direct cylinder injected internal combustion engine as set forth in claim 4 wherein the fuel injector axis is disposed centrally over the scavenge port.
Claim 7
Dependent Claim
24 words
A direct cylinder injected internal combustion engine as set forth in claim 5 wherein the exhaust port is disposed diametrically opposite the scavenge port.
Claim 8
Dependent Claim
40 words
A direct cylinder injected internal combustion engine as set forth in claim 6 further including a pair of additional scavenge ports each served by a respective scavenge passage and disposed between the first mentioned scavenge port and the exhaust port.
Claim 9
Dependent Claim
43 words
A direct cylinder injected internal combustion engine as set forth in claim 7 wherein the upper peripheral edge of the exhaust port is spaced a distance ES from the upper peripheral edge of the cylinder bore and wherein the following relationship exists: 0.35ES<A<0.065ES.
Claim 10
Dependent Claim
51 words
A direct cylinder injected internal combustion engine as set forth in claim 1 wherein the spray nozzle is configured to direct a portion of the fuel flowing therefrom downwardly toward the head of said piston and another portion in a direction generally above said spray axis and toward said cylinder head.
Claim 11
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 9 wherein the upwardly directed spray from the fuel injector has a lesser volume than the portion of the spray directed toward the head of the piston.
Claim 12
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 10 wherein the spray from the fuel injector extends through an arc in the direction of the axis of the cylinder bore that is greater than 45°.
Claim 13
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 11 wherein the arc is about 100°.
Claim 14
Dependent Claim
44 words
A direct cylinder injected internal combustion engine as set forth in claim 9 wherein the spray from the spray nozzle is formed in two distinct and separate portions, one extending above the injector nozzle axis and the other extending below the injector nozzle axis.
Claim 15
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 13 wherein the upwardly directed spray from the fuel injector has a lesser volume than the portion of the spray directed toward the head of the piston.
Claim 16
Dependent Claim
41 words
A direct cylinder injected internal combustion engine as set forth in claim 14 wherein the lowermost spray is configured so as to spray more fuel toward the side of the piston head beneath the fuel injector then on the other side.
Claim 17
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 15 wherein the spray from the fuel injector extends through an arc in the direction of the axis of the cylinder bore that is greater than 45°.
Claim 18
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 16 wherein the arc is about 100°.
Claim 19
Dependent Claim
43 words
A direct cylinder injected internal combustion engine as set forth in claim 1 wherein the spray nozzle sprays in a generally conical pattern within said cylinder bore and extending through an arc in the direction of the piston axis of greater than 45°.
Claim 20
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 18 wherein the arc is about 100°.
Claim 21
Dependent Claim
22 words
A direct cylinder injected internal combustion engine as set forth in claim 1 wherein the engine operates on a four cycle principle.
Claim 22
Dependent Claim
140 words
A direct cylinder injected internal combustion engine comprised a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and said cylinder head a variable volume chamber, a fuel injector supported within said cylinder block and having a nozzle portion defining a spray axis extending into said cylinder bore and transversely thereacross, said spray nozzle being configured to direct a portion of the fuel flowing therefrom generally toward the axis of said cylinder bore and downwardly toward the head of said piston and another portion in a direction generally above said spray axis and toward the axis of said cylinder bore and toward said cylinder head.
Claim 23
Dependent Claim
140 words
A direct cylinder injected internal combustion engine comprised a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and said cylinder head a variable volume chamber, a fuel injector supported within said cylinder block and having a nozzle portion defining a spray axis extending into said cylinder bore and transversely thereacross, said spray nozzle being configured to direct a portion of the fuel flowing therefrom generally toward the axis of said cylinder bore and downwardly toward the head of said piston and another portion in a direction generally above said spray axis and toward the axis of said cylinder bore and toward said cylinder head.
Claim 24
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 21 wherein the upwardly directed spray from the fuel injector has a lesser volume than the portion of the spray directed toward the head of the piston.
Claim 25
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 21 wherein the spray from the fuel injector extends through an arc in the direction of the axis of the cylinder bore that is greater than 45°.
Claim 26
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 23 wherein the arc is about 100°.
Claim 27
Dependent Claim
44 words
A direct cylinder injected internal combustion engine as set forth in claim 21 wherein the spray from the spray nozzle is formed in two distinct and separate portions, one extending above the injector nozzle axis and the other extending below the injector nozzle axis.
Claim 28
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 25 wherein the upwardly directed spray from the fuel injector has a lesser volume than the portion of the spray directed toward the head of the piston.
Claim 29
Dependent Claim
41 words
A direct cylinder injected internal combustion engine as set forth in claim 26 wherein the lowermost spray is configured so as to spray more fuel toward the side of the piston head beneath the fuel injector then on the other side.
Claim 30
Dependent Claim
39 words
A direct cylinder injected internal combustion engine as set forth in claim 27 wherein the spray from the fuel injector extends through an arc in the direction of the axis of the cylinder bore that is greater than 45°.
Claim 31
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 28 wherein the arc is about 100°.
Claim 32
Dependent Claim
56 words
A direct cylinder injected internal combustion engine as set forth in claim 21 wherein the engine operates on a two cycle, crankcase compression principle and further including at least one scavenge passage opening into said cylinder bore through a scavenge port and at least one exhaust passage opening into said cylinder bore through an exhaust port.
Claim 33
Dependent Claim
37 words
A direct cylinder injected internal combustion engine as set forth in claim 30 wherein the fuel injector is disposed between the upper peripheral edge of the scavenge port and the upper peripheral edge of the cylinder bore.
Claim 34
Dependent Claim
25 words
A direct cylinder injected internal combustion engine as set forth in claim 31 wherein the fuel injector axis is disposed centrally over the scavenge port.
Claim 35
Dependent Claim
24 words
A direct cylinder injected internal combustion engine as set forth in claim 32 wherein the exhaust port is disposed diametrically opposite the scavenge port.
Claim 36
Dependent Claim
176 words
A direct cylinder injected internal combustion engine comprised a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and said cylinder head a variable volume chamber, a fuel injector supported within said cylinder block and having a nozzle portion defining a spray axis extending into said cylinder bore and transversely thereacross and defined by only two spray paths, one of said spray paths of said spray nozzle being configured to direct a portion of the fuel flowing therefrom downwardly toward the head of said piston and the other of said spray paths directing another portion of the injected fuel in a direction generally above said spray axis and toward said cylinder head, said spray nozzle spraying in a generally conical pattern within said cylinder bore and extending through an arc in the direction of the piston axis of greater than 45°.
Claim 37
Dependent Claim
176 words
A direct cylinder injected internal combustion engine comprised a cylinder block having a cylinder bore extending from an upper peripheral edge closed by a cylinder head, a piston reciprocating in said cylinder bore between a bottom dead center (BDC) position and a top dead center (TDC) position and forming with said cylinder bore and said cylinder head a variable volume chamber, a fuel injector supported within said cylinder block and having a nozzle portion defining a spray axis extending into said cylinder bore and transversely thereacross and defined by only two spray paths, one of said spray paths of said spray nozzle being configured to direct a portion of the fuel flowing therefrom downwardly toward the head of said piston and the other of said spray paths directing another portion of the injected fuel in a direction generally above said spray axis and toward said cylinder head, said spray nozzle spraying in a generally conical pattern within said cylinder bore and extending through an arc in the direction of the piston axis of greater than 45°.
Claim 38
Dependent Claim
19 words
A direct cylinder injected internal combustion engine as set forth in claim 34 wherein the arc is about 100°.
References Cited (Backward Citations)
GB175156A
Cited
GB723972A
Cited
DE1934882A1
Cited
JPS5263529A
Cited
DE3128543A1
Cited
WO1987000575A1
Cited
US4790270A
Cited
GB2199617A
Cited
GB2215398A
Cited
US5062395A
Cited
US4932370A
Cited
DE4100086A1
Cited
US5107810A
Cited
US5249557A
Cited
US5237966A
Cited
FR2692625A1
Cited
US5284111A
Cited
US5553579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-06 | 2002-01-05 | 2002-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-06 | 2006-01-05 | 2006-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-06 | 2010-01-05 | 2010-07-07 | $7700.00 | Window Closed / Lapsed |