US4223645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber of an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1979-07-06
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Granted: 1980-09-23
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Expires: 1999-07-06
Abstract
Abstract An internal combustion engine comprising a combustion chamber and an accumulation chamber which are interconnected to each other via an accumulation valve. The accumulation chamber is filled with catalyzer pellets for reforming the combustible mixture accumulated in the accumulation chamber. The accumulation valve is opened during the compression stroke. In the first half of the compression stroke, a jet of the reformed combustible mixture is spouted into the combustion chamber from the accumulation chamber to create a strong swirl motion in the combustion chamber. In the latter half of the compression stroke, the combustible mixture in the combustion chamber flows into the accumulation chamber where the combustible mixture accumulates under high pressure, and the mixture is then spouted into the combustion chamber at the next cycle, from the accumulation chamber.
Inventors
- 👤 Hidetaka Nohira
- 👤 Sumio Ito
- 👤 Teruo Kumai
- 👤 Hisashi Oki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; F02B21/00; F02B51/00; F02B51/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
An internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port which is connected to said combustion chamber and containing a catalytic material therein for reforming a suction gas in said cavity; an intake valve movably mounted on said cylinder head for leading the suction gas into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere, and; a valve means for opening said port of the cavity during the compression stroke to spout out a jet of the reformed suction gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke.
Claim 2
Dependent Claim
147 words
An internal combustion engine comprising: a cylinder block having a cylinder bore therein; a cylinder head mounted on said cylinder block and having a cavity therein; a piston reciprocally movable in said cylinder bore; a combustion chamber formed between said cylinder head and said piston, said cavity having a port which is connected to said combustion chamber and containing a catalytic material therein for reforming a suction gas in said cavity; an intake valve movably mounted on said cylinder head for leading the suction gas into said combustion chamber; an exhaust valve movably mounted on said cylinder head for discharging exhaust gas into the atmosphere, and; a valve means for opening said port of the cavity during the compression stroke to spout out a jet of the reformed suction gas under pressure into said combustion chamber from said cavity during the first half of the compression stroke.
Claim 3
Dependent Claim
27 words
An internal combustion engine as claimed in claim 1, wherein said catalytic material is made of a reducing catalyzer such as cobalt, nickel, iron, palladium or platinum.
Claim 4
Dependent Claim
22 words
An internal combustion engine as claimed in claim 2, wherein said reducing catalyzer is coated onto an inner wall of said cavity.
Claim 5
Dependent Claim
17 words
An internal combustion engine as claimed in claim 2, wherein said reducing catalyzer is adhered onto pellets.
Claim 6
Dependent Claim
36 words
An internal combustion engine as claimed in claim 4, wherein said cavity has therein a wire netting dividing said cavity into an upper interior and a lower interior, said upper interior being filled with said pellets.
Claim 7
Dependent Claim
39 words
An internal combustion engine as claimed in claim 1, wherein said engine comprises a plurality of cylinders each having said cavity and said valve means, each of said cavity being interconnected to each other via a common connecting passage.
Claim 8
Dependent Claim
36 words
An internal combustion engine as claimed in claim 1, wherein said engine further comprises a guide means for guiding said jet of the reformed suction gas to create a strong swirl motion in said combustion chamber.
Claim 9
Dependent Claim
17 words
An internal combustion engine as claimed in claim 7, wherein said guide means comprises a guide passage.
Claim 10
Dependent Claim
25 words
An internal combustion engine as claimed in claim 8, wherein said guide passage is a groove formed in an inner wall of said cylinder head.
Claim 11
Dependent Claim
57 words
An internal combustion engine as claimed in claim 9, wherein said valve means comprises a poppet valve having a vlave head which is directly exposed to said combustion chamber, said groove being formed by a pair of vertical walls and a semi-cylindrical wall located at a position closely adjacent to the peripheral edge of said valve head.
Claim 12
Dependent Claim
21 words
An internal combustion engine as claimed in claim 9, wherein said groove extends to the circumferential direction of said combustion chamber.
Claim 13
Dependent Claim
27 words
An internal combustion engine as claimed in claim 8, wherein said guide passage comprises a cylindrical hollow member fixed onto an inner wall of said cylinder head.
Claim 14
Dependent Claim
29 words
An internal combustion engine as claimed in claim 12, wherein said cylindrical hollow member comprises a cap having an opening directed to the circumferential direction of said combustion chamber.
Claim 15
Dependent Claim
59 words
An internal combustion engine as claimed in claim 1, wherein said engine further comprises an ignition means having a spark plug, said port of the cavity remaining opened over a crank angle ranged from a crank angle near that at which said intake valve is closed to a crank angle near that at which the ignition is carried out.
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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |