US5058548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of an internal combustion engine
Assignee: Subaru Corp
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Filing: 1990-05-31
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Granted: 1991-10-22
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Expires: 2010-05-31
Abstract
Abstract A combustion chamber of an engine has a fuel injector provided for injecting fuel directly in the combustion chamber. An arc-shaped offset cavity is formed in a roof of the combustion chamber, and a fuel injector is located at a top of the cavity on the axis of the cylinder of the engine. A spark plug is located on the axis so as to ignite the fuel injected from the injector and passing the gap of the spark plug.
Inventors
- 👤 Koji Morikawa
- 👤 Akira Furuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:53
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/101; F02B2023/106; F02B2023/108; 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: 4
Claim 1
Independent Claim
151 words
A combustion chamber of an engine having at least one cylinder, which has a piston, a combustion chamber defined in the cylinder by the piston, a fuel injector provided for injecting fuel directly in the combustion chamber, and a spark plug, wherein: said fuel injector is a type for injecting fuel in a form of a cone and is located at a position close to an axis of said cylinder, said spark plug is located at a position such that a gap of the spark plug is positioned around said axis, and disposed apart from the injector by a predetermined distance for igniting the fuel injected from the injector and passing said gap, said distance is between a first position where a speed of fuel spray at middle and low loads on said engine becomes low and a second position where a dispersion of the fuel spray becomes a predetermined spread.
Claim 2
Dependent Claim
151 words
A combustion chamber of an engine having at least one cylinder, which has a piston, a combustion chamber defined in the cylinder by the piston, a fuel injector provided for injecting fuel directly in the combustion chamber, and a spark plug, wherein: said fuel injector is a type for injecting fuel in a form of a cone and is located at a position close to an axis of said cylinder, said spark plug is located at a position such that a gap of the spark plug is positioned around said axis, and disposed apart from the injector by a predetermined distance for igniting the fuel injected from the injector and passing said gap, said distance is between a first position where a speed of fuel spray at middle and low loads on said engine becomes low and a second position where a dispersion of the fuel spray becomes a predetermined spread.
Claim 3
Dependent Claim
139 words
A combustion chamber of an engine having at least one cylinder, which has a piston, a combustion chamber defined in the cylinder by the piston, a fuel injector provided for injecting fuel directly in the combustion chamber, and a spark plug, wherein: said fuel injector is located at a position close to an axis of said cylinder; said spark plug is located at a position such that a gap of the spark plug is positioned around said axis, and disposed apart from the injector by a predetermined distance for igniting the fuel injected from the injector and passing said gap, a roof of the combustion chamber has an arc-shaped offset cavity and a plug mounting portion having a flat surface parallel with a slope of said cone; and the fuel injector is located at a top of said cavity.
Claim 4
Dependent Claim
139 words
A combustion chamber of an engine having at least one cylinder, which has a piston, a combustion chamber defined in the cylinder by the piston, a fuel injector provided for injecting fuel directly in the combustion chamber, and a spark plug, wherein: said fuel injector is located at a position close to an axis of said cylinder; said spark plug is located at a position such that a gap of the spark plug is positioned around said axis, and disposed apart from the injector by a predetermined distance for igniting the fuel injected from the injector and passing said gap, a roof of the combustion chamber has an arc-shaped offset cavity and a plug mounting portion having a flat surface parallel with a slope of said cone; and the fuel injector is located at a top of said cavity.
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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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |