Continuously variable valve lift device
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United States of America Patent
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May 12, 2015
Grant Date -
Oct 9, 2014
app pub date -
Oct 19, 2011
filing date -
Oct 19, 2011
priority date (Note) -
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Abstract
A continuously variable valve lift device with improved lift amount change accuracy includes a rocker arm causing an engine valve to perform an opening/closing operation with a cam of a cam shaft, and an engine valve lift amount change mechanism. The mechanism has a control shaft which has an eccentric circular disc cam, a control arm which swings about the eccentric circular disc cam and having a cam contact portion in contact with a first cam and a first arm, second biasing means for biasing the cam contact portion against the first cam, a second cam portion of a free-form surface shape contacting with the second arm and the rocker arm, a cam member supported so as to be capable of turning around the shall main body, and a link arm with both ends supported so as to be capable of turning by the first arm and the second arm.
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