Motorcycle breather valve adjustment system and method

Details Motorcycle breather valve adjustment system and method Motorcycle breather valve adjustment system and method

1988-03-28

1989-09-26

Wolfe, Willis R.

Internal-combustion engines

Two-cycle

Rear compression

123196CP, F02B 3304, F01M 100

Patent

active

048692131

ABSTRACT:
A system is provided for relieving gas pressure developed in a crank case under an internal combustion engine piston as the reciprocating piston travels from top dead center toward and beyond bottom dead center, and wherein a rotary breather valve is employed. The rotary valve has a rotary sleeve rotatable within a fixed sleeve, the rotary and fixed sleeves respectively having first and second arcuate ports which come into increasing and decreasing registration in timed relation to the piston travel, such decreasing registration terminating after the piston reaches bottom dead center. Oil and air mist are discharged through the registered ports during said piston travel. In this system, a method for compensating for the replacement of a relatively smaller displacement piston chamber with a relatively larger displacement piston chamber is provided, said method including:

REFERENCES:
patent: 2111242 (1938-03-01), Harley
patent: 4142487 (1979-03-01), Somraty
patent: 4532897 (1985-08-01), Metzger
patent: 4765291 (1988-08-01), Kurio et al.

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