US3814068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber for an internal combustion engine of direct injection type
Assignee: Isuzu Motors Ltd
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Filing: 1972-04-12
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Granted: 1974-06-04
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Expires: 1992-04-12
Abstract
Abstract Direct injection type internal combustion engine including combustion chambers each formed by a cylinder head, a cylinder liner and a piston head, the piston head having a cavity wherein the air swirl is produced by known means, and fuel injection nozzles each disposed substantially in the center of the each cavity and having a plurality of orifices adapted to direct jets of fuel radially against the cavity wall, said cavity being so constructed that the cavity wall of a generally circular contour is locally extended toward the center of the cavity to form the same number of side portions as the nozzle orifices, consisting of straight lines or nearly straight curves, said side portions being equidistantly spaced apart and interconnected with arcuate curves thereby to form a multilobed or multilateral cavity, and the nozzle orifices are turned and displaced to enable the jets of fuel therefrom to impinge obliquely against said side portions of the cavity wall and be deflected thereby.
Inventors
- 👤 M Kimbara
- 👤 Y Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:31
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0696; F02B23/0618; F02B23/0624; F02B23/0645; F02B23/0648; F02B23/0651; F02B23/0666; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
In an internal combustion engine of the direct injection type including combustion chambers each formed by a cylinder head, a cylinder liner, a piston head having a wall defining a generally cylindrical cavity, means for producing air swirl in said cavity and fuel injection means each having a plurality of fuel injection nozzles, the improvement comprising, in combination, means mounting said fuel injection means substantially at the center of said cavity with said nozzles being arranged to inject jets of fuel into said cavity radially against said cavity wall, said cavity wall being structured with portions thereof extending inwardly toward the center of said cavity to form said cavity with a plurality of generally straight side portions, said side portions being equidistantly spaced apart circumferentially about said cavity with arcuate curved portions of said wall extending between said side portions, the number of said side portions provided being equal to the number of nozzles in said fuel injection means, said fuel injection means being disposed relative to said cavity wall for displacement thereof to enable saId jets of fuel to impinge obliquely against said side portions.
Claim 2
Dependent Claim
186 words
In an internal combustion engine of the direct injection type including combustion chambers each formed by a cylinder head, a cylinder liner, a piston head having a wall defining a generally cylindrical cavity, means for producing air swirl in said cavity and fuel injection means each having a plurality of fuel injection nozzles, the improvement comprising, in combination, means mounting said fuel injection means substantially at the center of said cavity with said nozzles being arranged to inject jets of fuel into said cavity radially against said cavity wall, said cavity wall being structured with portions thereof extending inwardly toward the center of said cavity to form said cavity with a plurality of generally straight side portions, said side portions being equidistantly spaced apart circumferentially about said cavity with arcuate curved portions of said wall extending between said side portions, the number of said side portions provided being equal to the number of nozzles in said fuel injection means, said fuel injection means being disposed relative to said cavity wall for displacement thereof to enable saId jets of fuel to impinge obliquely against said side portions.
Claim 3
Dependent Claim
23 words
An engine according to claim 1 wherein three of said side portions are provided to form said cavity in a generally triangular shape.
Claim 4
Dependent Claim
23 words
An engine according to claim 1 wherein four of said side portions are provided to form said cavity in a generally square shape.
Claim 5
Dependent Claim
23 words
An engine according to claim 1 wherein five of sid side portions are provided to form said cavity in a generally pentagonal shape.
Claim 6
Dependent Claim
23 words
An engine according to claim 1 wherein six of said side portions are provided to form said cavity in a generally hexagonal shape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |