Two-stroke internal combustion engine

Details Two-stroke internal combustion engine Two-stroke internal combustion engine

2007-07-17

2007-07-17

Wolfe, Willis R. (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0730SC

Reexamination Certificate

active

11445972

ABSTRACT:
A two-stroke internal combustion engine (1) includes one pair or two pairs of scavenging passageways (31, 32) of reverse flow system where scavenging outlet ports (31b,32b) are opened to the cylinder bore (10a); the internal combustion engine being characterized in that an external air inlet port (42, 44, 46) for introducing external air into a combustion actuating chamber (15) formed over a piston (20) is formed at a portion of the cylinder (10) which is located closer to an exhaust port than a scavenging outlet port (31b,32b) from which an air-fuel mixture (M) is introduced into the combustion actuating chamber (15) in a descending stroke of piston, and/or the external air inlet port (42, 44, 46) is formed at a portion of the cylinder (10) which enables the external air to be introduced into the combustion actuating chamber (15) prior to introduction of the air-fuel mixture (M).

REFERENCES:
patent: 6367432 (2002-04-01), Araki
patent: 6668770 (2003-12-01), Carlsson et al.
patent: 6718917 (2004-04-01), Andersson et al.
patent: 2002/0100438 (2002-08-01), Raffenberg et al.
patent: 2003/0005895 (2003-01-01), Carlsson et al.
patent: 2005/0139179 (2005-06-01), Mavinahally et al.
Japanese Utility Model Laid-open Publication (Kokai) No. 57-53026 (1982).
Patent Abstracts of Japan, Application No. 07-280862, filed Oct. 27, 1995, Publication No. 09-125966 dated May 13, 1997 of Noguchi Sukenori.

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