STRUCTURE OF DRIVING MEMBER OF ENGINE VALVE
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United States of America Patent
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N/A
Issued Date -
Dec 15, 2011
app pub date -
May 23, 2011
filing date -
Jun 15, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An engine includes a camshaft carrying a first intake cam, a second intake cam, and an exhaust cam for selectively driving an intake valve driving member and an exhaust valve driving member, which in turn drive an intake valve and an exhaust valve. The intake valve driving member includes first and second driving members, which form push rollers respectively in engagement with the first and second intake cams and a pressing section in engagement with the intake valve. The first and second driving members form bores communicating each other to form a hydraulic cylinder. First and second pistons are movable within the bores to selectively set the first and second driving members in a condition of being allowed to operate independently or in combination with each other.
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