Patent US3867914A successfully refreshed from Google Patents.
US3867914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for accelerating fuel vaporization in an internal combustion engine
Assignee: Honda Motor Co Ltd
•
Filing: 1973-06-29
•
Granted: 1975-02-25
•
Expires: 1993-06-29
Abstract
Abstract In an internal combustion engine of the type having a main combustion chamber supplied with a lean mixture and an auxiliary combustion chamber supplied with a rich mixture, a spark plug in the auxiliary chamber ignites the rich mixture and the resulting flame passes through a torch nozzle to ignite the lean mixture in the main chamber. The intake passage which supplies the auxiliary chamber with the rich mixture is integrally formed in the interior of the exhaust passage which comes from the main chamber, the heat of the exhaust thereby heating the fuel mixture to vaporize it so as to improve the starting performance of the engine and at the same time to reduce the emission of harmful air polluting ingredients in the exhaust.
Inventors
- 👤 Shoichiro Irimajiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:51
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/08; F02M31/087; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
In an internal combustion engine of the type having a cylinder head with a combustion chamber formed therein, the combination comprising: means forming an intake conduit in said cylinder head for passing a fuel mixture to said chamber, means forming an exhaust conduit in said cylinder head for passing exhaust gases from said chamber, a first portion of said intake conduit being coextensive with a portion of said exhaust conduit, said intake conduit having a peripheral wall a substantial portion of which extends into said exhaust conduit in heat transferring relationship, a second portion of said intake conduit not being coextensive with said exhaust conduit and extending through said cylinder head, a heat insulating sleeve disposed within said second portion of said intake conduit.
Claim 2
Dependent Claim
124 words
In an internal combustion engine of the type having a cylinder head with a combustion chamber formed therein, the combination comprising: means forming an intake conduit in said cylinder head for passing a fuel mixture to said chamber, means forming an exhaust conduit in said cylinder head for passing exhaust gases from said chamber, a first portion of said intake conduit being coextensive with a portion of said exhaust conduit, said intake conduit having a peripheral wall a substantial portion of which extends into said exhaust conduit in heat transferring relationship, a second portion of said intake conduit not being coextensive with said exhaust conduit and extending through said cylinder head, a heat insulating sleeve disposed within said second portion of said intake conduit.
Claim 3
Dependent Claim
31 words
The combination set forth in claim 1 wherein said intake conduit has a diameter which is less than that of said exhaust conduit and wherein said peripheral wall is relatively thin.
Claim 4
Dependent Claim
147 words
In an internal combustion engine of the type having a cylinder head with a main combustion chamber and an auxiliary combustion chamber, the combination comprising: means integrally forming an exhaust conduit in said cylinder head for passing exhaust gases from said main combustion chamber, means integrally forming an intake conduit in said cylinder head for passing a fuel mixture to said auxiliary combustion chamber, a first portion of said intake conduit being longitudinally coextensive with a portion of said exhaust conduit, said intake conduit having a peripheral wall a portion of which is coextensive with a peripheral wall of said exhaust conduit, a further portion of the peripheral wall of said intake conduit, residing within said exhaust conduit in heat transferring relationship, a second portion of said intake conduit extending through said cylinder head, a heat insulating sleeve disposed within said second portion of said intake conduit.
Claim 5
Dependent Claim
147 words
In an internal combustion engine of the type having a cylinder head with a main combustion chamber and an auxiliary combustion chamber, the combination comprising: means integrally forming an exhaust conduit in said cylinder head for passing exhaust gases from said main combustion chamber, means integrally forming an intake conduit in said cylinder head for passing a fuel mixture to said auxiliary combustion chamber, a first portion of said intake conduit being longitudinally coextensive with a portion of said exhaust conduit, said intake conduit having a peripheral wall a portion of which is coextensive with a peripheral wall of said exhaust conduit, a further portion of the peripheral wall of said intake conduit, residing within said exhaust conduit in heat transferring relationship, a second portion of said intake conduit extending through said cylinder head, a heat insulating sleeve disposed within said second portion of said intake conduit.
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) | 1978-02-24 | 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 |