Patent US5529038A successfully refreshed from Google Patents.
US5529038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct injected engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1994-12-23
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Granted: 1996-06-25
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Expires: 2014-12-23
Abstract
Abstract A number of embodiments of multi-valve twin overhead cam internal combustion engines having direct fuel injection and spark plugs that are disposed between the camshafts and generally centrally of the combustion chamber. Various orientations are disclosed, and in all disclosed embodiments, twin spark plugs are employed.
Inventors
- 👤 Naoki Tsuchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:03
CPC Classifications
F; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F1/4221; F02F3/00; F02F3/26; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/18; F02B2275/48; F02B23/00; F02B23/08; F02B23/10; F02B23/101; F02F1/242; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
167 words
A direct injected, spark-ignited internal combustion engine comprised of a cylinder block defining a cylinder bore, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore to define a combustion chamber with said cylinder bore and a head of said piston, a fuel injector mounted in said cylinder head and disposed substantially on the axis of said cylinder bore at an acute angle thereto, a spark plug mounted in said cylinder head with a spark gap disposed generally centrally in said combustion chamber and inclined at an acute angle to said cylinder bore axis, and an induction system for delivering a charge to the combustion chamber on one side of a plane containing said cylinder bore axis and an exhaust system for discharging the burnt charge from said combustion chamber on the other side of said plane, the flow of air from said intake passage being in opposition to the flow of fuel from the fuel injector.
Claim 2
Dependent Claim
167 words
A direct injected, spark-ignited internal combustion engine comprised of a cylinder block defining a cylinder bore, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore to define a combustion chamber with said cylinder bore and a head of said piston, a fuel injector mounted in said cylinder head and disposed substantially on the axis of said cylinder bore at an acute angle thereto, a spark plug mounted in said cylinder head with a spark gap disposed generally centrally in said combustion chamber and inclined at an acute angle to said cylinder bore axis, and an induction system for delivering a charge to the combustion chamber on one side of a plane containing said cylinder bore axis and an exhaust system for discharging the burnt charge from said combustion chamber on the other side of said plane, the flow of air from said intake passage being in opposition to the flow of fuel from the fuel injector.
Claim 3
Dependent Claim
42 words
A direct injected, spark-ignited internal combustion engine as in claim 1, wherein the axes of the spark plug and the fuel injector lie on opposite sides of a second plane containing the cylinder bore axis and perpendicular to the first mentioned plane.
Claim 4
Dependent Claim
24 words
A direct injected, spark-ignited internal combustion engine as in claim 2, wherein there are provided a pair of spark plugs in the cylinder head.
Claim 5
Dependent Claim
24 words
A direct injected, spark-ignited internal combustion engine as in claim 3, wherein the spark plugs are disposed on opposite sides of the fuel injector.
Claim 6
Dependent Claim
154 words
A direct injected, spark-ignited internal combustion engine comprised of a cylinder block defining a cylinder bore, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore to define a combustion chamber with said cylinder bore and a head of said piston, a fuel injector mounted in said cylinder head and disposed substantially on the axis of said cylinder bore at an acute angle thereto, a spark plug mounted in said cylinder head with a spark gap disposed generally centrally in said combustion chamber and inclined at an acute angle to said cylinder bore axis, an induction system terminating at least a pair of intake valves for delivering a charge to the combustion chamber on one side of a plane containing said cylinder bore axis and an exhaust system for discharging the burnt charge from the combustion chamber on the other side of said plane.
Claim 7
Dependent Claim
154 words
A direct injected, spark-ignited internal combustion engine comprised of a cylinder block defining a cylinder bore, a piston reciprocating in said cylinder bore, a cylinder head affixed to said cylinder block and closing said cylinder bore to define a combustion chamber with said cylinder bore and a head of said piston, a fuel injector mounted in said cylinder head and disposed substantially on the axis of said cylinder bore at an acute angle thereto, a spark plug mounted in said cylinder head with a spark gap disposed generally centrally in said combustion chamber and inclined at an acute angle to said cylinder bore axis, an induction system terminating at least a pair of intake valves for delivering a charge to the combustion chamber on one side of a plane containing said cylinder bore axis and an exhaust system for discharging the burnt charge from the combustion chamber on the other side of said plane.
Claim 8
Dependent Claim
42 words
A direct injected, spark-ignited internal combustion engine as in claim 5, wherein the axes of the spark plug and the fuel injector lie on opposite sides of a second plane containing the cylinder bore axis and perpendicular to the first mentioned plane.
Claim 9
Dependent Claim
32 words
A direct injected, spark-ignited internal combustion engine as in claim 6, wherein the flow of air from the intake passage is in opposition to the flow of fuel from the fuel injector.
Claim 10
Dependent Claim
24 words
A direct injected, spark-ignited internal combustion engine as in claim 7, wherein there are provided a pair of spark plugs in the cylinder head.
Claim 11
Dependent Claim
30 words
A direct injected, spark-ignited internal combustion engine as in claim 6, wherein the flow from the induction system is in the same direction as the flow from the fuel injector.
Claim 12
Dependent Claim
24 words
A direct injected, spark-ignited internal combustion engine as in claim 9, wherein there are provided a pair of spark plugs in the cylinder head.
Claim 13
Dependent Claim
20 words
A direct injected, spark-ignited internal combustion engine as in claim 5, wherein the induction system terminates at three intake valves.
Claim 14
Dependent Claim
24 words
A direct injected, spark-ignited internal combustion engine as in claim 11, wherein there are provided a pair of spark plugs in the cylinder head.
Claim 15
Dependent Claim
32 words
A direct injected, spark-ignited internal combustion engine as in claim 11, wherein the flow of air from the intake passage is in opposition to the flow of fuel from the fuel injector.
Claim 16
Dependent Claim
30 words
A direct injected, spark-ignited internal combustion engine as in claim 11, wherein the flow from the induction system is in the same direction as the flow from the fuel injector.
Claim 17
Dependent Claim
69 words
A direct injected, spark-ignited internal combustion engine as in claim 11, wherein the intake valves comprise a center intake valve disposed furthest from the plane containing the cylinder bore axis and a pair of side intake valves, each lying at least in part adjacent the plane and wherein the induction passage comprises a first portion serving the center intake valve and a second portion serving the side intake valves.
Claim 18
Dependent Claim
25 words
A direct injected, spark-ignited internal combustion engine as in claim 15, further including throttle valve means for controlling the flow through the side intake passages.
References Cited (Backward Citations)
GB615324A
Cited
FR1006541A
Cited
US3154059A
Cited
US4086878A
Cited
US4203393A
Cited
US4658780A
Cited
US4480620A
Cited
US4844025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-25 | 1999-12-25 | 2000-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-25 | 2003-12-25 | 2004-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-25 | 2007-12-25 | 2008-06-25 | $7700.00 | Window Closed / Lapsed |