Invention Application
- Patent Title: Variable-valve-actuation apparatus for internal combustion engine
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Application No.: US09908924Application Date: 2001-07-20
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Publication No.: US20020007809A1Publication Date: 2002-01-24
- Inventor: Yoshiaki Miyazato , Seinosuke Hara , Makoto Nakamura
- Applicant: UNISIA JECS CORPORATION
- Applicant Address: null
- Assignee: UNISIA JECS CORPORATION
- Current Assignee: UNISIA JECS CORPORATION
- Current Assignee Address: null
- Priority: JP2000-220397 20000721
- Main IPC: F01L001/34
- IPC: F01L001/34

Abstract:
A VVA apparatus includes a driving shaft, a crank cam arranged at an outer periphery of the driving shaft, a VO cam swingably supported by the driving shaft to actuate an engine valve, and a rocker arm having a first arm swingably mounted to an eccentric control cam at a first pivotal point and a second arm rotatably mounted to the crank cam and the VO cam at a second pivotal point and a third pivotal point, respectively, the rocker arm transmitting a driving force of the crank cam to the VO cam. The valve lift produced by the VO cam is varied by changing a rocking fulcrum of the rocker arm through rotation control of the control cam, and the second pivotal point and the third pivotal point are located on the side of the second arm of the rocker arm.
Public/Granted literature
- US06499454B2 Variable-valve-actuation apparatus for internal combustion engine Public/Granted day:2002-12-31
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