Patent US3916852A successfully refreshed from Google Patents.
US3916852A
Expired / Lapsed
US
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Intake mixture heating device for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1973-07-06
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Granted: 1975-11-04
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Expires: 1993-07-06
Abstract
Abstract An internal combustion engine of the type having a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle, contains apparatus for heating a rich mixture supplied to the auxiliary combustion chamber. The heating apparatus comprises a metal pipe formed of two half sections joined longitudinally, the pipe being positioned within an exhaust passage leading from the main combustion chamber. The pipe is secured to the exhaust passage only at the ends of the pipe and not at intermediate positions along the length of the pipe, in order to accommodate thermal expansion without cracking.
Inventors
- 👤 Yoshitoshi Sakurai
- 👤 Satoru Ohata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:26
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/08; F02M31/087; F02M31/093; F02B; F02B19/00; F02B19/10; F02B19/1019; F02B19/1023; F02B19/1028; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
In an internal combustion engine, the combination of: walls including a piston forming a main combustion chamber, walls forming an auxiliary combustion chamber, means forming a torch nozzle connecting said chambers, spark ignition means associated with the auxiliary chamber, means forming an intake passage for delivering a rich mixture to the auxiliary chamber, means forming an intake passage for delivering a lean mixture to the main chamber, means including a member forming an exhaust passage for conducting exhaust gases from the main chamber, a portion of the auxiliary chamber intake passage comprising a metal pipe enveloped within the exhaust passage and secured relative to the exhaust passage member only at the ends of the metal pipe thereof which extend into the body of said member.
Claim 2
Dependent Claim
125 words
In an internal combustion engine, the combination of: walls including a piston forming a main combustion chamber, walls forming an auxiliary combustion chamber, means forming a torch nozzle connecting said chambers, spark ignition means associated with the auxiliary chamber, means forming an intake passage for delivering a rich mixture to the auxiliary chamber, means forming an intake passage for delivering a lean mixture to the main chamber, means including a member forming an exhaust passage for conducting exhaust gases from the main chamber, a portion of the auxiliary chamber intake passage comprising a metal pipe enveloped within the exhaust passage and secured relative to the exhaust passage member only at the ends of the metal pipe thereof which extend into the body of said member.
Claim 3
Dependent Claim
43 words
The combination set forth in claim 1 wherein said means forming an exhaust passage includes a casting having a flange, said metal pipe extending to and terminating at said flange, said flange including a passage communicating with the interior of said metal pipe.
Claim 4
Dependent Claim
28 words
The combination set forth in claim 2 wherein said flange is located immediately adjacent the cylinder head and said passage through said flange extends to the cylinder head.
Claim 5
Dependent Claim
27 words
The combination set forth in claim 1 wherein said means forming an exhaust passage includes a riser cavity, said metal pipe extending to line said riser cavity.
Claim 6
Dependent Claim
165 words
In an internal combustion engine, the combination of: walls including a piston and a cylinder head forming a main combustion chamber, walls including said cylinder head forming an auxiliary combustion chamber, means forming a torch nozzle connecting said chambers, spark ignition means associated with the auxiliary chamber, a main riser, an auxiliary riser, means fOrming an intake passage for delivering a lean mixture from said main riser to said main combustion chamber, a casting forming an exhaust passage for conducting exhaust gases from the main combustion chamber past said main and auxiliary risers, said casting including a flange extending into said exhaust passage adjacent said cylinder head and means forming an intake passage for delivering a rich mixture from said auxiliary riser to said auxiliary chamber, said intake passage means for said auxiliary chamber including a metal pipe extending from said flange to said auxiliary riser within said exhaust passage, said pipe being secured to said casting and at the ends of said metal pipe.
Claim 7
Dependent Claim
165 words
In an internal combustion engine, the combination of: walls including a piston and a cylinder head forming a main combustion chamber, walls including said cylinder head forming an auxiliary combustion chamber, means forming a torch nozzle connecting said chambers, spark ignition means associated with the auxiliary chamber, a main riser, an auxiliary riser, means fOrming an intake passage for delivering a lean mixture from said main riser to said main combustion chamber, a casting forming an exhaust passage for conducting exhaust gases from the main combustion chamber past said main and auxiliary risers, said casting including a flange extending into said exhaust passage adjacent said cylinder head and means forming an intake passage for delivering a rich mixture from said auxiliary riser to said auxiliary chamber, said intake passage means for said auxiliary chamber including a metal pipe extending from said flange to said auxiliary riser within said exhaust passage, said pipe being secured to said casting and at the ends of said metal pipe.
Claim 8
Dependent Claim
37 words
The combination set forth in claim 5 wherein said metal pipe is anchored into said flange at one end of said metal pipe and is anchored into said casting forming said exhaust passage at said auxiliary riser.
Claim 9
Dependent Claim
25 words
The combination of claim 5 wherein said flange includes a passage communicating with the interior of said metal pipe and extending to said cylinder head.
Claim 10
Dependent Claim
21 words
The combination as set forth in claim 5 wherein said metal pipe extends to form a liner for said auxiliary riser.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |