Adjustable rotary valve assembly for a combustion engine

Details Adjustable rotary valve assembly for a combustion engine Adjustable rotary valve assembly for a combustion engine

1993-02-01

1993-11-02

Cross, E. Rollins

Internal-combustion engines

Two-cycle

Rear compression

123 73V, 12319014, F02B 3304

Patent

active

052576019

ABSTRACT:
A rotary valve assembly is provided for use in a combination engine, wherein the valve assembly is adjustable for variable valve timing during engine operation. The rotary valve assembly comprises a rotary valve plate formed by a pair of valve leaves mounted coaxially in overlapping relation and defining an open arcuate valve port. The valve plate is rotatably mounted to extend across and thereby open and close an engine valve passage, such as an intake passage in a two-stroke combustion engine. An adjustment sleeve is provided to rotate the valve leaves during engine operation to rotate the valve leaves during engine operation in response to one or more selected engine operating conditions, to correspondingly and selectively adjust the engine valve timing.

REFERENCES:
patent: 1009945 (1911-11-01), Veitch
patent: 3822682 (1974-07-01), Sherwood
patent: 4071000 (1978-01-01), Herbert
patent: 4418658 (1983-12-01), DiRoss
patent: 4550696 (1985-11-01), Ehrlich
patent: 4838220 (1989-06-01), Parsons

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