US4088099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture compressing, external auto-ignition four-stroke cycle internal combustion engine
Assignee: Dr Ing HCF Porsche AG
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Filing: 1976-08-19
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Granted: 1978-05-09
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Expires: 1996-08-19
Abstract
Abstract A mixture compressing external auto-ignited four-stroke cycle internal combustion engine, with charge stratification, has the largest portion of the fuel charge supplied to the main combustion chamber as a lean fuel mixture through at least one inlet valve. The remaining portion of the charge is supplied to an auxiliary combustion chamber as a rich fuel mixture through at least one additional mixture inlet. Also provided is an ignition chamber and an auxiliary combustion chamber connected thereto through at least one opening. The opening is small compared to the size of the ignition chamber in which a sparkplug is arranged. The volume of the ignition chamber is dimensioned in relation to the volume of the auxiliary combustion chamber so that during ignition of the rich fuel mixture a stable flame zone is formed.
Inventors
- 👤 Dusan Gruden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:07
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1061; F02B19/1004; F02B19/1014; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B75/12; F02B2075/125; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S123/00; Y10S123/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A mixture compressing, external auto-ignition, four-stroke cycle internal combustion engine including stratified charging, in which the largest portion of the charge is supplied through at least one inlet valve as a fuel-lean fuel-air mixture to a main combustion space and the remaining portion of the charge being supplied as a fuel-rich fuel-air mixture to an auxiliary combustion chamber through at least one additional mixture inlet, wherein an ignition chamber is associated with the auxiliary combustion chamber and is connected to the auxiliary combustion chamber through at least one opening and in which a spark plug is arranged, characterized in that the volume (Vz) of the ignition chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Vz = (0.01 to 0.1) Vn.
Claim 2
Dependent Claim
127 words
A mixture compressing, external auto-ignition, four-stroke cycle internal combustion engine including stratified charging, in which the largest portion of the charge is supplied through at least one inlet valve as a fuel-lean fuel-air mixture to a main combustion space and the remaining portion of the charge being supplied as a fuel-rich fuel-air mixture to an auxiliary combustion chamber through at least one additional mixture inlet, wherein an ignition chamber is associated with the auxiliary combustion chamber and is connected to the auxiliary combustion chamber through at least one opening and in which a spark plug is arranged, characterized in that the volume (Vz) of the ignition chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Vz = (0.01 to 0.1) Vn.
Claim 3
Dependent Claim
43 words
An internal combustion engine according to claim 1, further characterized in that the ignition angle between ignition in the ignition chamber and the start of burning of the fuel-air mixture in the auxiliary combustion chamber is at about 5° to 10° crankshaft rotation.
Claim 4
Dependent Claim
42 words
An internal combustion engine according to claim 1, further characterized in that the ignition chamber is connected to the auxiliary combustion chamber through at least two openings having a cross section smaller in comparison to the cross section of the ignition chamber.
Claim 5
Dependent Claim
28 words
An internal combustion engine according to claim 3, thereby characterized in that the openings are arranged opposite from each other at the outer circumference of the ignition chamber.
Claim 6
Dependent Claim
35 words
An internal combustion engine according to claim 3, further characterized in that one of the openings is arranged at the part of the circumference of the ignition chamber which lies closest to the mixture inlet.
Claim 7
Dependent Claim
30 words
An internal combustion engine according to claim 3, characterized in that the openings are positioned one in relation to the other under an angle opening towards the auxiliary combustion chamber.
Claim 8
Dependent Claim
182 words
A mixture compressing, external auto-ignition, four-stroke cycle internal combustion engine including stratified charging, in which the largest portion of the charge is supplied through at least one inlet valve as a fuel-lean fuel-air mixture to a main combustion space and the remaining portion of the charge being supplied as a fuel-rich fuel-air mixture to an auxiliary combustion chamber through at least one additional mixture inlet, wherein an ignition chamber is associated with the auxiliary combustion chamber through at least one opening and in which a spark plug is arranged, characterized in that the volume (Vz) of the ignition chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Vz = (0.01 to 0.1) Vn, and that the fuel quantity (Mk) per working cycle of the auxiliary combustion chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Mk = (0.1 to 0.3) Vn, whereby Mk = fuel quantity (mm 3 ) of the auxiliary combustion chamber for each working cycle and Vn = volume of the auxiliary combustion chamber (cm 3 ).
Claim 9
Dependent Claim
182 words
A mixture compressing, external auto-ignition, four-stroke cycle internal combustion engine including stratified charging, in which the largest portion of the charge is supplied through at least one inlet valve as a fuel-lean fuel-air mixture to a main combustion space and the remaining portion of the charge being supplied as a fuel-rich fuel-air mixture to an auxiliary combustion chamber through at least one additional mixture inlet, wherein an ignition chamber is associated with the auxiliary combustion chamber through at least one opening and in which a spark plug is arranged, characterized in that the volume (Vz) of the ignition chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Vz = (0.01 to 0.1) Vn, and that the fuel quantity (Mk) per working cycle of the auxiliary combustion chamber is in the following relationship to the volume (Vn) of the auxiliary combustion chamber: Mk = (0.1 to 0.3) Vn, whereby Mk = fuel quantity (mm 3 ) of the auxiliary combustion chamber for each working cycle and Vn = volume of the auxiliary combustion chamber (cm 3 ).
Claim 10
Dependent Claim
37 words
An internal combustion engine according to claim 7, wherein the at least one opening connecting the auxiliary chamber to the injection chamber is of a cross-section which is reduced in comparison with that of said injection chamber.
Claim 11
Dependent Claim
43 words
An internal combustion engine according to claim 7, further characterized in that the ignition angle between ignition in the ignition chamber and the start of burning of the fuel-air mixture in the auxiliary combustion chamber is at about 5° to 10° crankshaft rotation.
Claim 12
Dependent Claim
42 words
An internal combustion engine according to claim 7, further characterized in that the ignition chamber is connected to the auxiliary combustion chamber through at least two openings having a cross section smaller in comparison to the cross section of the ignition chamber.
Claim 13
Dependent Claim
28 words
An internal combustion engine according to claim 10, thereby characterized in that the openings are arranged opposite from each other at the outer circumference of the ignition chamber.
Claim 14
Dependent Claim
35 words
An internal combustion engine according to claim 10, further characterized in that one of the openings is arranged at the part of the circumference of the ignition chamber which lies closest to the mixture inlet.
Claim 15
Dependent Claim
30 words
An internal combustion engine according to claim 11, characterized in that the openings are positioned one in relation to the other under an angle opening towards the auxiliary combustion chamber.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |