Internal-combustion engines – Two-cycle – Rear compression
Patent
1999-02-22
2000-09-05
McMahon, Marguerite
Internal-combustion engines
Two-cycle
Rear compression
F02B 2520, F02B 3304, F02M 1900
Patent
active
061127086
ABSTRACT:
A stratified scavenging two-cycle engine, which enables a reduction in size and an improvement in productivity, includes a carburetor (6), which is provided between an air cleaner (7) and a suction fitting (4), wherein a mixture flow passage (6B) and an air flow passage (6A) are formed in the carburetor at least generally in parallel with each other, an air control valve (6a) is disposed in the air flow passage in the carburetor, and a mixture control valve (6b) is disposed in the mixture flow passage in the carburetor so that the carburetor and the valves (6a and 6b) constitute a single unit. The suction fitting (4), which is provided between the carburetor (6) and the closest outer face of the cylinder block (2), is a single piece and contains an air flow passage (4a), which is fluidly connected to the air flow passage (6A) in the carburetor (6) and to scavenging ports (2a) in the cylinder block, and a mixture flow passage (4b), which is fluidly connected to the mixture flow passage (6B) in the carburetor (6) and to a chamber in a crankcase (3).
REFERENCES:
patent: 4248185 (1981-02-01), Jaulmes
patent: 4398509 (1983-08-01), Offenstadt et al.
patent: 4777913 (1988-10-01), Staerzl et al.
patent: 5503119 (1996-04-01), Glover
Kato Hiroshi
Sawada Toshiharu
Watanabe Takeshi
Komatsu Zenoah & Co.
McMahon Marguerite
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