Control system for variable valve timing apparatus
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 13, 2014
app pub date -
Nov 14, 2013
filing date -
Nov 2, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A control system for a variable valve timing apparatus for an internal combustion engine comprises: a electronic control unit having (i) a phase control portion for temporarily reversing a direction of changing a rotational phase of a cam shaft, so that the direction is temporarily changed to an opposite direction of changing the rotational phase of the cam shaft to a target value, when the locked condition is detected after the engine operation is stopped and (ii) a phase-changing amount setting portion for setting a phase-changing amount when controlling the rotational phase of the cam shaft in the reversed direction after the engine operation is stopped. The phase control portion carries out the control of the rotational phase of the cam shaft in the reversed direction based on the phase-changing amount set by the phase-changing amount setting portion, after the engine operation is stopped.
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