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US 7,069,890 B2Granted
Valve train device for an engine
AssigneeYamaha Motor Co., Ltd.
InventorsHideo Fujita, Koichi Hatamura
Life of this patent
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AssigneeYamaha Motor Co., Ltd.
InventorsHideo Fujita, Koichi Hatamura
Estimating the term…
A valve train device for an engine is adapted to pivot a rocker arm supported on a rocker arm support shaft to drive a valve which opens and closes a valve opening formed in a combustion chamber. The device comprises a valve drive device and a swing member pivotally supported on a swing member support shaft and driven to pivot about the swing member support shaft by the valve drive device. An intermediate rocker member is pivotally supported on the rocker arm support shaft. The intermediate rocker member is provided between a swing cam surface formed on the swing member and a rocker face formed on the rocker arm, for transmitting the movement of the swing cam surface generated by the valve drive device to the rocker face. An intermediate rocker moving mechanism is configured to rotate the rocker arm support shaft and thereby move a first contact point between the intermediate rocker member and the swing cam surface and a second contact point between the intermediate rocker member and the rocker face to continuously vary at least one of the valve opening duration and the amount of valve lift.
A valve train device for an engine adapted to pivot a rocker arm supported on a rocker arm support shaft to drive a valve which opens and closes a valve opening formed in a combustion chamber, the device comprising a valve drive device, a swing member pivotally supported on a swing member support shaft and driven to pivot about the swing member support shaft by the valve drive device, an intermediate rocker member pivotally supported on the rocker arm support shaft, the intermediate rocker member being provided between a swing cam surface formed on the swing member and a rocker face formed on the rocker arm, for transmitting the movement of the swing cam surface generated by the valve drive device to the rocker face, and an intermediate rocker moving mechanism configured to rotate the rocker arm support shaft and thereby move a first contact point between the intermediate rocker member and the swing cam surface and a second contact point between the intermediate rocker member and the rocker face to continuously vary at least one of the valve opening duration and the amount of valve lift.
A method of continuously adjusting at least one of maximum valve lift and valve timing of a valve of an internal combustion engine, the method comprising:
Dependencies are inferred from the claim text.