Apparatus and method for controlling variable valve timing mechanism
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United States of America Patent
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Mar 23, 2004
Grant Date -
Nov 28, 2002
app pub date -
May 23, 2002
filing date -
May 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an apparatus for, controlling a variable valve timing mechanism that variably controls valve timing of an engine by changing a rotation phase of a camshaft relative to a crankshaft due to friction braking of an electromagnetic brake, the rotation phase is controlled while limiting a change rate of the rotation phase.
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