Control device for valve system in automobile engine

Details Control device for valve system in automobile engine Control device for valve system in automobile engine

1993-10-27

1995-03-07

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9016, 123 9012, F01L 134

Patent

active

053948416

ABSTRACT:
A control device for a valve system in which low or high speed cams can be smoothly changed. The control device comprises: a valve system including low and high speed cam selecting means for activating and deactivating intake or exhaust valves; and a control unit for calculating, based on engine operation data, a target engine speed to provide a cam selecting signal to the low and high speed cam selecting means, a variation of the engine speed based on the engine speed data, a corrected target engine speed based on the engine speed variation, target engine speed, and delay time of the operation of the cam selecting means, and activating the cam selecting means at the corrected target engine speed.

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