US4235203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-zone combustion chamber
Assignee: Individual
•
Filing: 1979-01-26
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Granted: 1980-11-25
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Expires: 1999-01-26
Abstract
Abstract The present invention relates to an internal combustion engine comprising means at cylinder head and piston level for improving combustion while reducing the tendency to knocking and pollution. This engine comprises a double feed system, an intake port for a rich mixture being arranged in a hollow in the cylinder head and comprising a retaining cup at its base, an intake port for a poor mixture and a projecting part at the top of the piston covering the hollow and the retaining cup and defining a precombustion chamber for communicating with a part of the chamber opposite the hollow, via channels made at the base of the projecting part. The invention finds advantageous application in the domain of automobile vehicle construction.
Inventors
- 👤 Georges Thery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:53
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/02; F02B19/04; F02B19/10; F02B19/1019; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/12; F02B2075/125; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
336 words
An internal combustion engine of the controlled-ignition type comprising at least one piston, a cylinder, and a cylinder head to define a combustion chamber, the head of said piston including a projection so that when said piston is at its top dead center position, said projection divides said combustion chamber into a temporary precombustion zone and a combustion zone, and when said piston is moved away from its top dead center position, said precombustion zone is opened to said combustion zone, said precombustion zone including means to receive a fluid of rich mixture and said combustion zone including means to receive a fluid or poor mixture, said precombustion zone being formed at least partially in said cylinder head by a recess formed therein, the recess of said precombustion zone including a fluid container at the base thereof for receiving said rich mixture such that the lower temperature of said cylinder head has a cooling effect on said precombustion zone before ignition to enhance condensation of said rich mixture and collection of same in said fluid container, said recess having a wide opening connected to said combustion zone for permitting, as said piston descends, an efficient sweeping of said recess and said fluid container to transfer unburnt rich mixture to said combustion zone to complete combustion, the exterior peripheral surface of the base of said projection including at least a groove formed therein which temporarily cooperates with said cylinder head to define at least one curved channel connecting said precombustion zone and said combustion zone for the passage of ignited gases when said projection is in said top dead center position such that the lower temperature of said cylinder head has a cooling effect on said channel, said channel extending in a plane substantially perpendicular to the axis of said cylinder and being formed in the base of said projection so that said channel enables ignition to be maintained while gases are passing from said precombustion zone to the base of said combustion zone through said channel.
Claim 2
Dependent Claim
336 words
An internal combustion engine of the controlled-ignition type comprising at least one piston, a cylinder, and a cylinder head to define a combustion chamber, the head of said piston including a projection so that when said piston is at its top dead center position, said projection divides said combustion chamber into a temporary precombustion zone and a combustion zone, and when said piston is moved away from its top dead center position, said precombustion zone is opened to said combustion zone, said precombustion zone including means to receive a fluid of rich mixture and said combustion zone including means to receive a fluid or poor mixture, said precombustion zone being formed at least partially in said cylinder head by a recess formed therein, the recess of said precombustion zone including a fluid container at the base thereof for receiving said rich mixture such that the lower temperature of said cylinder head has a cooling effect on said precombustion zone before ignition to enhance condensation of said rich mixture and collection of same in said fluid container, said recess having a wide opening connected to said combustion zone for permitting, as said piston descends, an efficient sweeping of said recess and said fluid container to transfer unburnt rich mixture to said combustion zone to complete combustion, the exterior peripheral surface of the base of said projection including at least a groove formed therein which temporarily cooperates with said cylinder head to define at least one curved channel connecting said precombustion zone and said combustion zone for the passage of ignited gases when said projection is in said top dead center position such that the lower temperature of said cylinder head has a cooling effect on said channel, said channel extending in a plane substantially perpendicular to the axis of said cylinder and being formed in the base of said projection so that said channel enables ignition to be maintained while gases are passing from said precombustion zone to the base of said combustion zone through said channel.
Claim 3
Dependent Claim
55 words
An internal combustion engine as claimed in claim 1, comprising an intake port with valve-controlled opening and closure for each of the mixtures admitted into the combustion chamber, the intake port for the rich mixture being located in said precombustion zone, and the intake port for the poor mixture being located in said combustion zone.
Claim 4
Dependent Claim
53 words
An internal combustion engine as claimed in claim 1, further including an injector for admitting the rich mixture into said precombustion zone and directed towards said fluid container, and an orifice formed in said combustion zone for admitting said poor mixture with opening and closure of said orifice being controlled by a valve.
Claim 5
Dependent Claim
35 words
An internal combustion engine as claimed in claim 1, including a single orifice located in said precombustion zone for the admission of the rich mixture and of the poor mixture, having controlled opening and closure.
Claim 6
Dependent Claim
20 words
An internal combustion engine as claimed in claim 4, wherein said orifice includes a pipe for admitting said rich mixture.
Claim 7
Dependent Claim
74 words
An internal combustion engine as claimed in claim 1, comprising an intake port and an exhaust port, and a second intake opening at the top of the cylinder, with controlled opening and closure, opening into said precombustion zone, said rich mixture being admitted through said opening into said precombustion zone whilst poor mixture is admitted through said intake port, said intake port and said second intake opening being connected to two separate supply pipes.
Claim 8
Dependent Claim
30 words
An engine as claimed in claim 6, wherein the intake pipe for the poor mixture is provided with a member for closing it during the starting phase of the engine.
Claim 9
Dependent Claim
23 words
An internal combustion engine as claimed in claim 6, wherein said pipes are formed from the branches issuing from a common supply pipe.
Claim 10
Dependent Claim
25 words
An engine as claimed in claim 6, further including means for delaying the admission of rich mixture with respect to the intake of poor mixture.
References Cited (Backward Citations)
USRE18575E
Cited
US2735413A
Cited
US1649700A
Cited
US2206322A
Cited
FR1382110A
Cited
US3592172A
Cited
US3976038A
Cited
US3921607A
Cited
US4026250A
Cited
US4041909A
Cited
US3987769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |