Two cycle engine

Details Two cycle engine Two cycle engine

1992-11-12

1993-10-12

Cross, E. Rollins

Internal-combustion engines

Two-cycle

Rear compression

123 73PP, F02B 3304

Patent

active

052515842

ABSTRACT:
Two embodiments of two cycle, crankcase compression engines wherein exhaust emissions are controlled by controlling the amount of scavenging air flow at low and mid ranges. The scavenging air flow is controlled by balance passages that interconnect at least two crankcase chambers of the engine and in which a control valve is provided. In one embodiment, the balance passage is positioned above the crankcase chambers and communicates with them through downwardly extending passages so as to preclude the likelihood of condensation of fuel or lubricant in the balance passages and to return any fuel or lubricant to the crankcase chambers.

REFERENCES:
patent: 2067715 (1937-01-01), Kylen
patent: 2639699 (1953-05-01), Kiekhaeffer
patent: 3815559 (1974-06-01), Anderson
patent: 4690109 (1987-09-01), Ogasahara et al.
patent: 4879974 (1989-11-01), Alvers
patent: 4892066 (1990-01-01), Brown
patent: 4898127 (1990-02-01), Phillips et al.

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