US3867915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated induction system for internal combustion engines
Assignee: Honda Motor Co Ltd
•
Filing: 1973-06-22
•
Granted: 1975-02-25
•
Expires: 1993-06-22
Abstract
Abstract An internal combustion engine has a main combustion chamber and an auxiliary combustion chamber which are in communication through a passage called a torch nozzle. The spark plug in the auxiliary chamber ignites the fuel-air mixture therein producing a torch flame which passes through the torch nozzle to ignite the mixture supplied to the main combustion chamber. The mixture supplied to the auxiliary chamber is richer than that supplied to the main chamber and to enhance the combustibility of the rich mixture, particularly upon cold starting of the engine, the present invention provides an auxiliary intake passage arranged in adjacent relationship with an exhaust pipe of the engine with a boundary wall therebetween composed of a material having a low heat capacity so that the rich mixture flowing to the auxiliary chamber is rapidly heated by the hot exhaust gases.
Inventors
- 👤 Yoshitoshi Sakurai
- 👤 Satoru Ohata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:50
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/08; F02M31/087; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
In an intake and exhaust manifold assembly for a multicylinder internal combustion engine, each cylinder having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, a spark plug associated with each auxiliary combustion chamber, a rich mixture passage communicating with the auxiliary combustion chamber, a lean mixture passage communicating with the main combustion chamber, and an exhaust passage communicating with the main combustion chamber, the improvement comprising, in combination: a main intake manifold having branch pipes communicating with a vaporizing chamber, each pipe being connected to deliver lean mixture to one of said lean mixture passages, respectively, a second manifold having branch pipes communicating with a collection chamber and each connected to receive exhaust gases from one of said exhaust passages, respectively, each exhaust pipe having an auxiliary intake pipe formed integrally therewith and extending throughout the length thereof, a boundary wall separating each auxiliary inlet pipe from its respective exhaust pipe, said auxiliary intake pipes extending from said collection chamber to each of said auxiliary inlet pasages, respectively, means for supplying rich mixture to said auxiliary intake pipes, means for securing the chambers together whereby the vaporization chamber may receive heat from the collection chamber, and means for supplying lean mixture to the vaporization chamber.
Claim 2
Dependent Claim
211 words
In an intake and exhaust manifold assembly for a multicylinder internal combustion engine, each cylinder having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, a spark plug associated with each auxiliary combustion chamber, a rich mixture passage communicating with the auxiliary combustion chamber, a lean mixture passage communicating with the main combustion chamber, and an exhaust passage communicating with the main combustion chamber, the improvement comprising, in combination: a main intake manifold having branch pipes communicating with a vaporizing chamber, each pipe being connected to deliver lean mixture to one of said lean mixture passages, respectively, a second manifold having branch pipes communicating with a collection chamber and each connected to receive exhaust gases from one of said exhaust passages, respectively, each exhaust pipe having an auxiliary intake pipe formed integrally therewith and extending throughout the length thereof, a boundary wall separating each auxiliary inlet pipe from its respective exhaust pipe, said auxiliary intake pipes extending from said collection chamber to each of said auxiliary inlet pasages, respectively, means for supplying rich mixture to said auxiliary intake pipes, means for securing the chambers together whereby the vaporization chamber may receive heat from the collection chamber, and means for supplying lean mixture to the vaporization chamber.
Claim 3
Dependent Claim
27 words
The combination set forth in claim 1 in which the means for supplying rich mixture includes a conduit in the collection chamber extending through the vaporization chamber.
Claim 4
Dependent Claim
23 words
The combination set forth in claim 1 in which carburetors mounted on the vaporization chamber supply the rich mixture and the lean mixture.
Claim 5
Dependent Claim
232 words
In an intake and exhaust manifold assembly for a multi-cylinder internal combustion engine, each cylinder having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, a spark plug associated with each auxiliary combustion chamber, a rich mixture passage communicating with the auxiliary combustion chamber, a lean mixture passage communicating with the main combustion chamber, and an exhaust passage communicating with the main combustion chamber, the improvement comprising, in combination: a main intake manifold having branch pipes communicating with a vaporizing chamber, each pipe being connected to deliver lean mixture to one of said lean mixture passages, respectively, a second manifold having branch pipes communicating with a collection chamber and each connected to receive exhaust gases from one of said exhaust passages, respectively, each exhaust pipe having an auxiliary intake pipe formed integrally therewith and extending throughout the length thereof, a boundary wall separating each auxiliary inlet pipe from its respective exhaust pipe, said auxiliary intake pipes extending from said collection chamber to each of said auxiliary inlet passages, respectively, conduit means in the collection chamber extending through the vaporization chamber for supplying rich mixture to said auxiliary intake pipes, means for securing the chamber together whereby the vaporization chamber may receive heat from the collection chamber, and carburetor means for supplying a lean mixture to the collection chamber and a rich mixture to the said conduit means.
Claim 6
Dependent Claim
232 words
In an intake and exhaust manifold assembly for a multi-cylinder internal combustion engine, each cylinder having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, a spark plug associated with each auxiliary combustion chamber, a rich mixture passage communicating with the auxiliary combustion chamber, a lean mixture passage communicating with the main combustion chamber, and an exhaust passage communicating with the main combustion chamber, the improvement comprising, in combination: a main intake manifold having branch pipes communicating with a vaporizing chamber, each pipe being connected to deliver lean mixture to one of said lean mixture passages, respectively, a second manifold having branch pipes communicating with a collection chamber and each connected to receive exhaust gases from one of said exhaust passages, respectively, each exhaust pipe having an auxiliary intake pipe formed integrally therewith and extending throughout the length thereof, a boundary wall separating each auxiliary inlet pipe from its respective exhaust pipe, said auxiliary intake pipes extending from said collection chamber to each of said auxiliary inlet passages, respectively, conduit means in the collection chamber extending through the vaporization chamber for supplying rich mixture to said auxiliary intake pipes, means for securing the chamber together whereby the vaporization chamber may receive heat from the collection chamber, and carburetor means for supplying a lean mixture to the collection chamber and a rich mixture to the said conduit means.
References Cited (Backward Citations)
US1285916A
Cited
US1705036A
Cited
US1777472A
Cited
US1744319A
Cited
US3092088A
Cited
US3382856A
Cited
US3659564A
Cited
US3780715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |