Variable timing of multiple engine cylinder valves

Details Variable timing of multiple engine cylinder valves Variable timing of multiple engine cylinder valves

1995-01-11

1996-03-19

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9016, F01L 902, F01L 1300

Patent

active

054996066

ABSTRACT:
Lost motion variable valve timing systems using hydraulic actuators controlled by a single control valve, preferably an electronically controlled solenoid valve, for actuating two or more valves on similar or identical timing and lift curves include prevention means that stop discharge pulses from one actuator being transmitted to and adversely affecting another actuator connected to the same control valve. Such prevention means may include one way check valves in the discharge lines connected with the control valve, non-aligned multiple inlet ports in the control valve and positioned to avoid transfer of pulses from one inlet port to another, or other return pulse preventing means.

REFERENCES:
patent: 4615306 (1986-10-01), Wakeman
patent: 4887562 (1989-12-01), Wakeman
patent: 4930465 (1990-06-01), Wakeman et al.
patent: 5154143 (1992-10-01), Stutzenberger
patent: 5158048 (1992-10-01), Robnett et al.
patent: 5216988 (1993-06-01), Taxon

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