US3884197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1973-07-02
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Granted: 1975-05-20
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Expires: 1993-07-02
Abstract
Abstract An internal combustion engine of the type having a relatively large main combustion chamber supplied with a lean mixture through a main inlet passage and a relatively small auxiliary combustion chamber supplied with a rich mixture through an auxiliary inlet passage, the auxiliary combustion chamber being in communication with the main combustion chamber through a torch nozzle. Means are provided for igniting the rich mixture to cause a flame to project through the torch nozzle to burn the lean mixture in the main combustion chamber. The main and auxiliary passages are throttled are supplied respectively through a relatively large main venturi passage and a relatively small auxiliary venturi passage, and wherein the effective area of the torch nozzle is greater than that of the auxiliary venturi passage.
Inventors
- 👤 Kiyoshi Miyaki
- 👤 Akira Okubo
- 👤 Sakuji Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1004; F02B19/1014; F02B19/1019; F02B19/1023; F02B19/1028; F02M; F02M13/00; F02M13/02; F02M13/04; F02M13/046; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
An internal combustion piston engine comprising: a relatively large main combustion chamber for receiving a lean air-fuel mixture; a relatively small auxiliary combustion chamber for receiving a rich air-fuel mixture; a torch nozzle connecting the chambers; means for igniting the rich mixture in the auxiliary combustion chamber to project a flame through the torch nozzle into the main combustion chamber; a main inlet passage communicating with the main combustion chamber and including a main venturi and a main throttle valve; an auxiliary inlet passage communicating with the auxiliary combustion chamber and including an auxiliary venturi and an auxiliary throttle valve; inlet valves at the chambers for controlling the inlet passages; the effective area of the auxiliaRy venturi being smaller than the effective area of the torch nozzle and the auxiliary inlet passage whereby maximum inlet flow through the torch nozzle is determined by the auxiliary venturi.
Claim 2
Dependent Claim
146 words
An internal combustion piston engine comprising: a relatively large main combustion chamber for receiving a lean air-fuel mixture; a relatively small auxiliary combustion chamber for receiving a rich air-fuel mixture; a torch nozzle connecting the chambers; means for igniting the rich mixture in the auxiliary combustion chamber to project a flame through the torch nozzle into the main combustion chamber; a main inlet passage communicating with the main combustion chamber and including a main venturi and a main throttle valve; an auxiliary inlet passage communicating with the auxiliary combustion chamber and including an auxiliary venturi and an auxiliary throttle valve; inlet valves at the chambers for controlling the inlet passages; the effective area of the auxiliaRy venturi being smaller than the effective area of the torch nozzle and the auxiliary inlet passage whereby maximum inlet flow through the torch nozzle is determined by the auxiliary venturi.
Claim 3
Dependent Claim
38 words
An internal combustion engine as defined in claim 1, wherein: a carburetor supplies fuel at the auxiliary venturi and an injector is disposed adjacent the main chamber inlet valve for injecting liquid fuel into the main inlet passage.
Claim 4
Dependent Claim
161 words
An internal combustion engine having a main combustion chamber for receiving a lean air-fuel mixture and an auxiliary combustion chamber for receiving a rich air-fuel mixture and a torch opening connecting the chambers, the improvement comprising in combination: a main inlet passage communicating with the main combustion chamber and including a main venturi and a main throttle valve, an auxiliary inlet passage communicating with the auxiliary combustion chamber and including an auxiliary venturi and an auxiliary throttle valve, means for igniting rich mixture in the auxiliary chamber to project a flame through the torch opening into the main combustion chamber, the effective area of the auxiliary venturi being smaller than the effective area of the torch nozzle and the auxiliary inlet passage whereby maximum flow through the torch nozzle is determined by the auxiliary venturi, and lesser rates of flow in the auxiliary inlet passage are determined by the auxiliary throttle valve, and means coordinating the movement of said throttle valves.
Claim 5
Dependent Claim
161 words
An internal combustion engine having a main combustion chamber for receiving a lean air-fuel mixture and an auxiliary combustion chamber for receiving a rich air-fuel mixture and a torch opening connecting the chambers, the improvement comprising in combination: a main inlet passage communicating with the main combustion chamber and including a main venturi and a main throttle valve, an auxiliary inlet passage communicating with the auxiliary combustion chamber and including an auxiliary venturi and an auxiliary throttle valve, means for igniting rich mixture in the auxiliary chamber to project a flame through the torch opening into the main combustion chamber, the effective area of the auxiliary venturi being smaller than the effective area of the torch nozzle and the auxiliary inlet passage whereby maximum flow through the torch nozzle is determined by the auxiliary venturi, and lesser rates of flow in the auxiliary inlet passage are determined by the auxiliary throttle valve, and means coordinating the movement of said throttle valves.
Claim 6
Dependent Claim
149 words
An internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber, the chambers being connected by a torch opening, the improvement comprising, in combination: a main inlet passage for supplying a lean mixture to the main combustion chamber, said main inlet passage including a main venturi and a main throttle valve, an auxiliary inlet passage adapted to supply a rich mixture to the auxiliary combustion chamber, said auxiliary inlet passage having an auxiliary venturi and an auxiliary throttle valve, means for igniting the mixture in the auxiliary chamber to project a flame through the torch opening into the main combustion chamber, the effective area of the auxiliary venturi being smaller than the effective area of the torch opening and the auxiliary inlet passage, whereby maximum flow through the torch opening is determined by the auxiliary venturi, and means coordinating the movement of said throttle valves.
Claim 7
Dependent Claim
149 words
An internal combustion piston engine having a main combustion chamber and an auxiliary combustion chamber, the chambers being connected by a torch opening, the improvement comprising, in combination: a main inlet passage for supplying a lean mixture to the main combustion chamber, said main inlet passage including a main venturi and a main throttle valve, an auxiliary inlet passage adapted to supply a rich mixture to the auxiliary combustion chamber, said auxiliary inlet passage having an auxiliary venturi and an auxiliary throttle valve, means for igniting the mixture in the auxiliary chamber to project a flame through the torch opening into the main combustion chamber, the effective area of the auxiliary venturi being smaller than the effective area of the torch opening and the auxiliary inlet passage, whereby maximum flow through the torch opening is determined by the auxiliary venturi, and means coordinating the movement of said throttle valves.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |