| US 7,451,729 B2 | ||
| Variable valve mechanism | ||
| Akira Sugiura, Nishio (Japan); Tetsuya Niwa, Nishio (Japan); Tamotsu Yamamoto, Nishio (Japan); Katsutoshi Kitagawa, Nishio (Japan); Tomiyasu Hirano, Nishio (Japan); and Tomoki Miyoshi, Nishio (Japan) | ||
| Assigned to Otics Corporation, Aichi-ken (Japan) | ||
| Filed on Mar. 12, 2007, as Appl. No. 11/716,745. | ||
| Claims priority of application No. 2006-177356 (JP), filed on Jun. 27, 2006. | ||
| Prior Publication US 2007/0295292 A1, Dec. 27, 2007 | ||
| Int. Cl. F01L 1/34 (2006.01) | ||
| U.S. Cl. 123—90.16 [123/90.15; 123/90.31] | 16 Claims |
| 1. A variable valve mechanism, comprising:
a rotating cam that is provided on a camshaft;
a swing arm that contacts with the rotating cam to swing;
a drive arm that drives a valve in conjunction with the swing arm;
a variable arm that turns the drive arm around a swing axis of the swing arm;
an actuator that drives the variable arm; and
a cam device that is provided between the swing arm and the drive arm;
wherein the variable arm is provided so as to be able to rotate relatively around the swing axis as the swing arm,
wherein the cam device changes the initial position of the drive arm with respect to the swing arm accompanying the turning
of the drive arm,
wherein the variable arm and the swing arm are supported so as to be able to rotate relatively to each other on a support
shaft,
wherein a control shaft is separate from the support shaft and is linked to the actuator,
wherein a control cam that drives the variable arm is provided on the control shaft, and
wherein a shim is interposed between the control cam and the variable arm.
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