Hydraulic circuit for valve operation timing changing device for

Details Hydraulic circuit for valve operation timing changing device for Hydraulic circuit for valve operation timing changing device for

1986-11-12

1989-01-03

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9036, F01L 134, F01M 910

Patent

active

047948922

ABSTRACT:
A hydraulic circuit for a valve operation timing control device for supplying oil pressure through an oil passage defined in a rocker shaft to an actuator disposed in rocker arms which are pivotally supported on the rocker shaft for transmitting lifting motion from cams rotating in synchronism with the crankshaft of an engine to valves disposed in intake or exhaust ports of a combustion chamber. A solenoid-operated valve and flows restricting orifice are provided between the oil pump and oil passage for causing oil flow to the oil passage for lubrication even when the oil is cold and the actuator is not operated.

REFERENCES:
patent: 4537164 (1985-08-01), Ajiki et al.
patent: 4537165 (1985-08-01), Honda et al.
patent: 4545342 (1985-10-01), Nakano et al.
patent: 4589387 (1986-05-01), Miura et al.

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