Controls apparatus for engine variable valve system

Details Controls apparatus for engine variable valve system Controls apparatus for engine variable valve system

1995-12-26

1997-03-25

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9044, F01L 1300

Patent

active

056134690

ABSTRACT:
A hydraulically powered and electrically activated control system for a variable valve selection assembly for an internal combustion engine of the type with two intake valves per cylinder and an overhead valve arrangement so as to selectively produce four different operational modes. The control system includes an ECU responsive to a plurality of engine and vehicle related operative parameters to control solenoid operated valves which selectively direct pressurized fluid to valve rocker arm latching means which either permit pairs of rocker arms to move independently of one another or cause a pair of rocker arms to move together.

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