US5163396A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for injected engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1991-12-30
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Granted: 1992-11-17
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Expires: 2011-12-30
Abstract
Abstract A number of embodiments of combustion chambers for direct cylinder injected engines wherein the combustion chamber has a recess surrounded by a squish area. The fuel injector is disposed so that it will spray into the recess against the wall rather than toward the squish area. Alternate spark plug locations are disclosed.
Inventors
- 👤 Takafumi Fukuda
- 👤 Takeshi Ito
- 👤 Keiichi Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02B23/105; F02F; F02F1/00; F02F1/24; F02F1/242; F02B2023/085; F02B2023/102; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/40; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A combustion chamber for an internal combustion engine comprising a cylinder block defining a cylinder bore, a piston reciprocating within said cylinder bore, a cylinder head affixed to said cylinder block enclosing said cylinder bore, said cylinder head, said piston and said cylinder bore defining a combustion chamber comprised of a recessed area surrounded by a squish area when said piston approaches top dead center position, a fuel injector supported by said engine and disposed to inject its spray within said recess toward the walls defining said recess and away from entry into said squish area, and spark plug means carried by said engine and disposed within said recessed area for firing the fuel injected by said fuel injector.
Claim 2
Dependent Claim
119 words
A combustion chamber for an internal combustion engine comprising a cylinder block defining a cylinder bore, a piston reciprocating within said cylinder bore, a cylinder head affixed to said cylinder block enclosing said cylinder bore, said cylinder head, said piston and said cylinder bore defining a combustion chamber comprised of a recessed area surrounded by a squish area when said piston approaches top dead center position, a fuel injector supported by said engine and disposed to inject its spray within said recess toward the walls defining said recess and away from entry into said squish area, and spark plug means carried by said engine and disposed within said recessed area for firing the fuel injected by said fuel injector.
Claim 3
Dependent Claim
29 words
A combustion chamber as set forth in claim 1 wherein the fuel spark plug means is disposed with its gap in the path of spray from the fuel injector.
Claim 4
Dependent Claim
26 words
A combustion chamber as set forth in claim 2 wherein the fuel injector and the spark plug means are disposed in opposing walls defining the recess.
Claim 5
Dependent Claim
22 words
A combustion chamber as set forth in claim 3 wherein the spark plug means comprises at least a pair of spark plugs.
Claim 6
Dependent Claim
34 words
A combustion chamber as set forth in claim 4 wherein one of the spark plugs is fired at a different time of the other of the spark plugs under at least some running conditions.
Claim 7
Dependent Claim
25 words
A combustion chamber as set forth in claim 1 wherein the recess is defined by a pair of curved walls joined by generally straight walls.
Claim 8
Dependent Claim
29 words
A combustion chamber as set forth in claim 6 wherein the fuel spark plug means is disposed with its gap in the path of spray from the fuel injector.
Claim 9
Dependent Claim
26 words
A combustion chamber as set forth in claim 7 wherein the fuel injector and the spark plug means are disposed in opposing walls defining the recess.
Claim 10
Dependent Claim
22 words
A combustion chamber as set forth in claim 8 wherein the spark plug means comprises at least a pair of spark plugs.
Claim 11
Dependent Claim
26 words
A combustion chamber as set forth in claim 9 wherein the fuel injector and the spark plug means are disposed in opposing walls defining the recess.
Claim 12
Dependent Claim
27 words
A combustion chamber as set forth in claim 6 wherein one of the curved walls has a substantially greater radius than the other of the curved walls.
Claim 13
Dependent Claim
29 words
A combustion chamber as set forth in claim 11 wherein the fuel spark plug means is disposed with its gap in the path of spray from the fuel injector.
Claim 14
Dependent Claim
26 words
A combustion chamber as set forth in claim 12 wherein the fuel injector and the spark plug means are disposed in opposing walls defining the recess.
Claim 15
Dependent Claim
22 words
A combustion chamber as set forth in claim 13 wherein the spark plug means comprises at least a pair of spark plugs.
Claim 16
Dependent Claim
34 words
A combustion chamber as set forth in claim 14 wherein one of the spark plugs is fired at a different time of the other of the spark plugs under at least some running conditions.
Claim 17
Dependent Claim
64 words
A combustion chamber as set forth in claim 1 wherein the recess is defined within the cylinder head by a pair of opposite facing curved walls interconnected by generally straight walls and enclosed at its upper surface by a downwardly inclined upper wall with the spark plug means positioned at the lower side thereof and the fuel injector positioned at the upper side thereof.
Claim 18
Dependent Claim
30 words
A combustion chambers as set forth in claim 16 wherein the spray axis of the fuel injector is substantially parallel to the angle of the top wall of the recess.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |