Variable cam timing control system and method

Details Variable cam timing control system and method Variable cam timing control system and method

1999-02-19

2000-08-15

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

73116, 731173, F01L 134, G01M 1500

Patent

active

061019933

ABSTRACT:
A system and method for measuring and controlling cam timing of an internal combustion engine uses a filtering method based on a number of equally spaced teeth mounted on the camshaft. The filtering method specifically removes certain oscillations caused by camshaft torsional effects. The filtering method also specifically removes oscillations due to production variations. These oscillations are removed with minimal effect on closed loop system response.

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