Valve timing changer

Details Valve timing changer Valve timing changer

2006-11-07

2006-11-07

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07131409

ABSTRACT:
A valve timing change apparatus of the present invention is an apparatus for changing the relative angular position between a cam shaft10and a sprocket30, which comprises an angle change mechanism80changing and holding the relative angular position between the cam shaft10and the sprocket30by oil pressure, an oil pressure generating mechanism90for generating oil pressure for driving the angle change mechanism80by relative rotation, and an electromagnetic retarder100for generating relative rotation at the oil pressure generating mechanism90. With this structure, simplification and downsizing of the apparatus, reduction of engine load, suppression of oil pressure drop, etc. can be obtained. Then, a plurality of the apparatus can be mounted on an engine. In this manner, downsizing of the valve timing change apparatus, reduction of engine load, downsizing of an oil pump, etc. can be obtained.

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