Methods and apparatus for providing variable valve lift for camshaft-actuated valves
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United States of America Patent
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Feb 1, 2005
Grant Date -
Jan 8, 2004
app pub date -
Jul 2, 2003
filing date -
Jul 4, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus suitable for use in reciprocally opening and closing a camshaft-actuated valve may include a rotating camshaft (20) having first and second cams (16, 17, 18) respectively defining first and second amounts of valve opening distance. A cam follower (10, 11, 12) may be defined on a mounting pin (24) so as to operatively engage the first and second cams in an alternating manner. At a first rotational position of the cam follower relative to the camshaft, the cam follower operatively engages the first cam and generates the first amount of valve opening distance. At a second rotational position, the cam follower operatively engages the second cam and generates the second amount of valve opening distance. A valve lever (6) transmits the respective generated first and second amounts of valve opening distance to the valve. A locking device (50) releasably locks the mounting pin and cam follower in the respective first and second rotational positions.
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