VARIABLE VALVE LIFT MECHANISM FOR ENGINE AND ARRANGEMENT OF OIL CONTROL VALVE
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United States of America Patent
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Issued Date -
Oct 20, 2011
app pub date -
Apr 18, 2011
filing date -
Apr 20, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An engine has a cylinder block mounted on a crankcase and a cylinder head mounted on the cylinder block. The cylinder head has one side forming an intake port and an intake valve and another side forming an exhaust port and an exhaust valve. A camshaft includes an intake cam assembly and an the exhaust cam assembly, which respectively drive an intake valve driving member and an exhaust valve driving member. The intake cam assembly includes a first intake cam and a second intake cam. The intake valve driving member includes a low lift driving member corresponding to the first intake cam and a high lift driving member corresponding to the second intake cam. The low lift driving member and the high lift driving member form a hydraulic cylinder, which receives therein hydraulically operable pistons.
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