US4073271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch ignition type internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1976-05-12
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Granted: 1978-02-14
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Expires: 1996-05-12
Abstract
Abstract A torch ignition type internal combustion engine has therein a main combustion chamber and an auxiliary combustion chamber which chambers are individually communicable with a common carburetor through a main intake valve and an auxiliary intake valve, respectively. The opening timing of the auxiliary intake valve is so controlled to be later than that of the main intake valve.
Inventors
- 👤 Masafumi Yamazaki
- 👤 Yasuhiko Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B19/1038; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
A torch ignition type internal combustion engine having fluidly communicated main and auxiliary combustion chambers for each of the engine cylinders, said main and auxiliary combustion chambers being respectively provided with main and auxiliary intake valves, said engine comprising: a carburetor having a throttle valve; a cylinder head having therein main and auxiliary intake ports which are respectively and fluidly communicable with said main and auxiliary combustion chambers through the respective main and auxiliary intake valves; an intake manifold consisting of a main tube portion fluidly communicating with said carburetor downstream of said throttle valve, main runner portions branched from said main tube portion and formed with main passageways communicating upstream with said main tube portion and dowstream with said main intake ports respectively, and auxiliary runner portions formed with auxiliary passageways each providing fluid communication between each of the auxiliary combustion chambers and said main tube portion through an opening formed in said main tube portion; and valve actuating means for allowing each of said main intake valves to open earlier than the corresponding auxiliary intake valve during the engine operation.
Claim 2
Dependent Claim
182 words
A torch ignition type internal combustion engine having fluidly communicated main and auxiliary combustion chambers for each of the engine cylinders, said main and auxiliary combustion chambers being respectively provided with main and auxiliary intake valves, said engine comprising: a carburetor having a throttle valve; a cylinder head having therein main and auxiliary intake ports which are respectively and fluidly communicable with said main and auxiliary combustion chambers through the respective main and auxiliary intake valves; an intake manifold consisting of a main tube portion fluidly communicating with said carburetor downstream of said throttle valve, main runner portions branched from said main tube portion and formed with main passageways communicating upstream with said main tube portion and dowstream with said main intake ports respectively, and auxiliary runner portions formed with auxiliary passageways each providing fluid communication between each of the auxiliary combustion chambers and said main tube portion through an opening formed in said main tube portion; and valve actuating means for allowing each of said main intake valves to open earlier than the corresponding auxiliary intake valve during the engine operation.
Claim 3
Dependent Claim
33 words
A torch ignition type internal combustion engine as claimed in claim 1, in which said opening is formed in a portion in the vicinity of a bottom wall of said main tube portion.
Claim 4
Dependent Claim
46 words
A torch ignition type internal combustion engine as claimed in claim 2, further comprising heat transfer means contacting said bottom wall of said main tube portion and in communication with at least one source of heat developed as a result of the operation of said engine.
Claim 5
Dependent Claim
33 words
A torch ignition type internal combustion engine as claimed in claim 3, in which said heat transfer means comprises a heat transfer chamber formed underneath said bottom wall of the main tube portion.
Claim 6
Dependent Claim
26 words
A torch ignition type internal combustion engine as claimed in claim 4, in which said source of said heat is an exhaust manifold of said engine.
Claim 7
Dependent Claim
26 words
A torch ignition type internal combustion engine as claimed in claim 4, in which said source of heat is a cooling water jacket of said engine.
Claim 8
Dependent Claim
35 words
A torch ignition type internal combustion engine as claimed in claim 1, in which said carburetor is of a down-draft type having a lower end connected to said main tube portion of said intake manifold.
Claim 9
Dependent Claim
39 words
A torch ignition type internal combustion engine as claimed in claim 1, in which said carburetor is of a two-barrel type having primary and secondary barrels and in which said opening is located in alignment with said primary barrel.
Claim 10
Dependent Claim
173 words
Method for operating a torch type internal combustion engine including main and auxiliary combustion chambers for each of the engine cylinders, said main and auxiliary combustion chambers being respectively provided with main and auxiliary intake valves, a carburetor having a throttle valve, a cylinder head having therein main and auxiliary intake ports which are respectively and fluidly communicable with said main and auxiliary combustion chambers through the respective main and auxiliary intake valves, an intake manifold consisting of a main tube portion fluidly communicating with said carburetor downstream of said throttle valve, main runner portions branched from said main tube portion and formed with main passageways communicating upstream said main tube portion and downstream with said main intake ports respectively, and auxiliary runner portions formed with auxiliary passageways each providing fluid communication between each of the auxiliary combustion chambers and said main tube portion through an opening formed in a portion in said main tube portion, characterized in the step of opening said main intake valve before opening of said auxiliary intake valve.
Claim 11
Dependent Claim
173 words
Method for operating a torch type internal combustion engine including main and auxiliary combustion chambers for each of the engine cylinders, said main and auxiliary combustion chambers being respectively provided with main and auxiliary intake valves, a carburetor having a throttle valve, a cylinder head having therein main and auxiliary intake ports which are respectively and fluidly communicable with said main and auxiliary combustion chambers through the respective main and auxiliary intake valves, an intake manifold consisting of a main tube portion fluidly communicating with said carburetor downstream of said throttle valve, main runner portions branched from said main tube portion and formed with main passageways communicating upstream said main tube portion and downstream with said main intake ports respectively, and auxiliary runner portions formed with auxiliary passageways each providing fluid communication between each of the auxiliary combustion chambers and said main tube portion through an opening formed in a portion in said main tube portion, characterized in the step of opening said main intake valve before opening of said auxiliary intake valve.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |