Multiple port cylinder for crankchamber precompression type two

Details Multiple port cylinder for crankchamber precompression type two Multiple port cylinder for crankchamber precompression type two

1980-03-26

1982-05-18

Burns, Wendell E.

Internal-combustion engines

Two-cycle

Rear compression

123 65P, F02B 3304

Patent

active

043299482

ABSTRACT:
A cylinder for crankchamber precompression type two stroke engines includes three pairs of main scavenging ports which are symmetrical with respect to a longitudinal plane passing through the centers of the intake and exhaust ports and containing the longitudinal center line of the cylinder. A pair of auxiliary scavenging ports are provided at the opposite sides of the longitudinal plane in such a manner that in a horizontal cross-section the flows from the auxiliary ports do not intersect with the flows from the main ports. Further, the auxiliary scavenging ports are directed further upwardly than the main ports.

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