Title: Internal combustion engine

Abstract: A torch ignition type internal combustion engine has a trap chamber comprising a cup-shaped member of a heat-resistant metal mounted on a cylinder head of the engine. The member has a substantially closed end protruding into a main combustion chamber and suction and discharge apertures through which the trap chamber always communicates with the main combustion chamber. A single intake port is provided in the cylinder head for supplying air-fuel mixture charges to both the main combustion chamber and trap chamber. The suction aperture is positioned adjacent to the back face of the valve head when it is in the open position so that a part of the air-fuel mixture from the single intake port flowing over the back face of the valve head is introduced through the suction aperture into the trap chamber on the intake stroke and ignited on the combustion stroke by a spark plug to provide torch jets which run through the suction and discharge apertures into the main combustion chamber, whereby a torch-ignition of the air-fuel mixture in the main combustion chamber is achieved by a simplified engine construction.

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Inventors: Noguchi, Masaaki (Nagoya, JA)
Sumiyoshi, Masaharu (Toyota, JA)
Tanaka, Yukiyasu (Okazaki, JA)
Tanaka, Taro (Chiryu, JA)

Application Number: 610889
Filing Date: 1975-09-05
Publication_date: 1978-04-18
Assignee: Nippon Soken, Inc. (Nishio, JA)
Primary Class(es): 123/268 123/262, 123/274, 123/280, 123/283, 123/293
Other Classes:
US Patent Ref:

2763248	Sep, 1956	Green et al.	123/32.
2799257	Jul, 1957	Stumpfig	123/32.
3213839	Oct, 1965	Gitlin	123/75.
3230939	Jan, 1966	Goossak	123/32.
3270721	Sep, 1966	Hideg	123/32.
3283751	Nov, 1966	Goossak	123/32.
3853097	Dec, 1974	Kume	123/32.
3930471	Jan, 1976	Leonard	123/32.
3974818	Aug, 1976	Noguchi et al.	123/32.

Other Refs:
Primary Examiner: Cox, Ronald B.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman