Valve operation timing regulation apparatus for internal combust

Details Valve operation timing regulation apparatus for internal combust Valve operation timing regulation apparatus for internal combust

1994-03-23

1994-11-15

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

053638174

ABSTRACT:
A valve operation timing regulation apparatus for changing the operation timing of the intake valve, etc., of internal combustion engine, in which the controllability is improved by avoiding operation variations of a value actuator. The rotational phase angle difference between the crankshaft and the camshaft is changed by driving a member interposed between the two shafts. A target value of the rotational phase angle difference is determined and an actual value measured by detecting operating conditions at various parts of the engine. The control deviation between the target and the actual value is calculated, so that a control unit decides a present control value of the actuator, by selecting on the basis of the error and past control values, one of a plurality of control values predetermined in a region free of unfavorable influences of actuator characteristic variations.

REFERENCES:
patent: 4909194 (1990-03-01), Bauer
patent: 4995351 (1991-02-01), Ohkubo et al.
patent: 5103780 (1992-04-01), Ishii
patent: 5184578 (1993-02-01), Quinn, Jr. et al.
patent: 5222465 (1993-06-01), Sakamoto et al.
patent: 5245968 (1993-09-01), Kolias et al.
patent: 5289805 (1994-03-01), Quinn, Jr. et al.

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