Valve actuating apparatus

Details Valve actuating apparatus Valve actuating apparatus

1984-06-08

1985-08-27

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9027, 123 9046, 123308, 123315, 123432, F01L 134, F01L 126

Patent

active

045371644

ABSTRACT:
A valve actuating apparatus for an internal combustion engine having selectively energizable intake/exhaust valves. Oil is supplied to valve actuators which perform the selective energization of the valve through a spool valve. The spool valve has a bypass for supplying operating oil to the actuators when the spool valve is set to the unenergized position in an amount insufficient for energizing the actuators but sufficient to purge air from the lines connecting the spool valve to the actuators. By so doing, the responsiveness of the actuator system is improved.

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patent: 3367312 (1968-02-01), Jonsson
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patent: 4353334 (1982-10-01), Neitz
patent: 4404937 (1983-09-01), Leitermann
patent: 4442806 (1984-04-01), Matsuura et al.
patent: 4469061 (1984-09-01), Ajiki et al.
patent: 4480617 (1984-11-01), Nakano et al.

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