Valve timing control system for engines

Details Valve timing control system for engines Valve timing control system for engines

1995-02-03

1996-06-04

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

055223524

ABSTRACT:
To realize a highly reliable feedback control of the valve timing, i.e., angular rotational relation between a crankshaft and a camshaft, three reference signals are generated from the crankshaft side, and three cam signals corresponding to three pulse inductors arranged at even angles to the camshaft or arbitrary angle intervals to the camshaft are generated from the camshaft side. The variation in the phase difference of each cam signal to each reference angle signal caused by the installation position of the corresponding pulse inductors is stored in a memory as compensation values indicating differences from the phase difference used as a reference. When the signals are detected, the corresponding compensation value for the phase differences other than those used as reference is read out, added and compensated. Based on the relation of the compensated phase difference and a target value of the valve timing, the rotational phase of the crankshaft and the camshaft is controlled.

REFERENCES:
patent: 4909194 (1990-03-01), Bauer
patent: 5218935 (1993-06-01), Quinn, Jr. et al.
patent: 5222465 (1993-06-01), Sakamoto et al.
patent: 5289805 (1994-03-01), Quinn, Jr. et al.

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