US3898803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas recombustion assembly for an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1974-05-31
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Granted: 1975-08-12
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Expires: 1994-05-31
Abstract
Abstract An internal combustion engine is provided with recombustion means which comprise a recombustion chamber case communicating with exhaust ports of the engine and secured to the engine housing. An outer case surrounding the recombustion chamber case is structured so that part of the outer case is integral with the engine housing, said integral part being formed by a portion of the engine housing which extends therefrom in the area surrounding the exhaust ports. Secondary air supplied to each exhaust port of the engine is warmed in an air chamber formed in the engine housing and located in the vicinity of the recombustion means.
Inventors
- 👤 Yoshio Sasaki
- 👤 Minoru Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:39
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; Y; Y10; Y10S; Y10S60/00; Y10S60/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
An exhaust gas recombustion assembly for an internal combustion engine including an engine housing and exhaust gas outlet ports, said assembly comprising an inner casing defining an exhaust gas recombustion chamber, said inner casing being mounted directly upon said engine housing over said exhaust gas outlet ports to define said recombustion chamber in direct flow relationship with said outlet ports, an outer casing surrounding said inner casing, said outer casing being partially formed from integrally extending wall portions of said engine housing, means for supplying secondary air into said exhaust gas outlet ports, and outlet means for said recombustion chamber whereby exhaust gases and secondary air are introduced directly from said outlet ports into said recombustion chamber with recombusted exhaust gases being discharged therefrom through said outlet means.
Claim 2
Dependent Claim
128 words
An exhaust gas recombustion assembly for an internal combustion engine including an engine housing and exhaust gas outlet ports, said assembly comprising an inner casing defining an exhaust gas recombustion chamber, said inner casing being mounted directly upon said engine housing over said exhaust gas outlet ports to define said recombustion chamber in direct flow relationship with said outlet ports, an outer casing surrounding said inner casing, said outer casing being partially formed from integrally extending wall portions of said engine housing, means for supplying secondary air into said exhaust gas outlet ports, and outlet means for said recombustion chamber whereby exhaust gases and secondary air are introduced directly from said outlet ports into said recombustion chamber with recombusted exhaust gases being discharged therefrom through said outlet means.
Claim 3
Dependent Claim
44 words
An assembly according to claim 1 including an air chamber defined by said engine housing proximate said recombustion chamber in flow communication between said secondary air supply and said outlet ports, said air chamber operating to warm secondary air supplied to said outlet ports.
Claim 4
Dependent Claim
44 words
An assembly according to claim 1 wherein said inner and outer casings are arranged in a spaced apart relationship defining an air gap therebetween, said assembly further including means for passing air through said air gap for controlling the temperature of said inner casing.
Claim 5
Dependent Claim
22 words
An assembly according to claim 3 wherein said outer casing is structured in a double walled configuration having insulating material enclosed therein.
Claim 6
Dependent Claim
67 words
An assembly according to claim 1 wherein said integrally extending wall portions of said housing comprise a generally concave configuration opening outwardly from said engine housing and extending therefrom along portions of said engine housing surrounding said outlet ports, said assembly further including an outer shell section mounted in sealed engagement with said integrally extending wall portions of said engine housing to define therewith said outer casing.
Claim 7
Dependent Claim
83 words
An assembly according To claim 1 wherein said inner casing is formed from a pair of shell sections, one of said shell sections having openings therein corresponding to the exhaust gas outlet ports of said engine housing and arranged to extend thereabout, the other of said shell sections being affixed in sealing engagement with said one shell section to define said inner casing as extending generally across said engine housing to overlie and cover the exit orifices of said exhaust gas outlet ports.
Claim 8
Dependent Claim
34 words
An assembly according to claim 3 including support spacers located within said air gap to maintain said spaced relationship between said inner and outer casings and to support said casings relative to each other.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |