Patent US4294209A successfully refreshed from Google Patents.
US4294209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1979-04-16
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Granted: 1981-10-13
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Expires: 1999-04-16
Abstract
Abstract An internal combustion engine operating with self-ignition which is equipped with a main combustion space including a piston recess and with an auxiliary chamber arranged in the cylinder head an injection nozzle is coordinated to the auxiliary chamber while the chamber includes an insert forming an overflow channel provided with several discharge holes terminating in the main combustion space. The discharge holes are matched as regards their direction and cross section to the main combustion space-air volume component to be seized or impinged upon by the respective jet passing through the corresponding discharge hole. The discharge holes are thereby proportional in cross section to the main combustion space-air volume component located in front thereof when the piston is in a position corresponding to the center point of the full-load heat-release curve and are directed toward the center of gravity of the respective main combustion space-air volume component.
Inventors
- 👤 Erwin Eisele
- 👤 Hans-Peter Charzinski
- 👤 Klaus Binder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:29
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/14; F02P; F02P13/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
An internal combustion engine comprising a plurality of pistons disposed in cylinders, a cylinder head, a main combustion space means, recess means provided in the respective pistons for forming at least a part of the main combustion space means, an auxiliary chamber means eccentrically provided in the cylinder head, and an injection nozzle means operatively associated with the auxiliary chamber means, several discharge openings provided in said auxiliary chamber means for discharging into the main combustion space means, the direction and cross section of the discharge openings being matched to a main combustion space-air volume component of a main combustion space-air volume to be impinged upon by a jet passing through the respective discharge openings, characterized in that the discharge openings have a cross section which is substantially proportional to the main combustion space-air volume component of the main combustion space-air volume disposed in front of and impinged upon by a jet passing through the respective discharge openings when the piston is at a position having a crankshaft angle corresponding to a center point of an area under a full-load heat-release curve for the combustion process, and in that the discharge openings are substantially directed toward a center of gravity of the respective main combustion space-air volume component of the main combustion space-air volume.
Claim 2
Dependent Claim
214 words
An internal combustion engine comprising a plurality of pistons disposed in cylinders, a cylinder head, a main combustion space means, recess means provided in the respective pistons for forming at least a part of the main combustion space means, an auxiliary chamber means eccentrically provided in the cylinder head, and an injection nozzle means operatively associated with the auxiliary chamber means, several discharge openings provided in said auxiliary chamber means for discharging into the main combustion space means, the direction and cross section of the discharge openings being matched to a main combustion space-air volume component of a main combustion space-air volume to be impinged upon by a jet passing through the respective discharge openings, characterized in that the discharge openings have a cross section which is substantially proportional to the main combustion space-air volume component of the main combustion space-air volume disposed in front of and impinged upon by a jet passing through the respective discharge openings when the piston is at a position having a crankshaft angle corresponding to a center point of an area under a full-load heat-release curve for the combustion process, and in that the discharge openings are substantially directed toward a center of gravity of the respective main combustion space-air volume component of the main combustion space-air volume.
Claim 3
Dependent Claim
29 words
An internal combustion engine according to claim 1, characterized in that the discharge openings are disposed on a cone with a center angle of about 155° to about 175°.
Claim 4
Dependent Claim
37 words
An internal combustion engine according to claim 2, characterized in that the crank angle of the piston is located at full-load within the area of about 17° to about 26° after upper dead-center position of the piston.
Claim 5
Dependent Claim
28 words
An internal combustion engine according to claim 3, characterized in that at least one further discharge opening is provided which is directed toward the top of the piston.
Claim 6
Dependent Claim
16 words
An internal combustion engine according to claim 4, characterized in that the engine operates with auto-ignition.
Claim 7
Dependent Claim
37 words
An internal combustion engine according to claim 1, characterized in that the crank angle of the piston is located at full-load within the area of about 17° to about 26° after upper dead-center position of the piston.
Claim 8
Dependent Claim
28 words
An internal combustion engine according to claim 1, characterized in that at least one further discharge opening is provided which is directed toward the top of the piston.
Claim 9
Dependent Claim
37 words
An internal combustion engine according to claim 7, characterized in that the crank angle of the piston is located at full-load within the area of about 17° to about 26° after upper dead-center position of the piston.
Claim 10
Dependent Claim
16 words
An internal combustion engine according to claim 1, characterized in that the engine operates with auto-ignition.
Claim 11
Dependent Claim
87 words
An internal combustion engine according to one of claims 1, 2, or 3, characterized in that the discharge opening having the largest cross section is located on a bi-sector of an angle determined by two adjacent discharge openings, said angle has a magnitude of between 90° to about 100°, and in that at least two further discharge openings are arranged approximately symmetrically to said bi-sector to form a second angle with an opposite direction of extension, said angle having a magnitude of about 120° to about 130°.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |