Variable valve mechanism of internal combustion engine

摘要

The present invention provides a variable valve mechanism of an internal combustion engine, which includes a main arm having at a rear end thereof a supported portion that is continuously supported swingably by a support member without floating upward, a sub arm which has a tip end to which a roller contacting a cam is rotatably attached, in which a center of the roller is located rearward of the pressing portion and forward of a swing center of the supported portion, which has a rear end that is swingably supported with respect to the main arm by a support pin, and in which a center of the support pin is located rearward of the center of the roller and forward of the swing center of the supported portion, and a switch pin that is inserted in a central portion of the roller.

主权项

1. A variable valve mechanism of an internal combustion engine, comprising:
a main arm having at a tip end thereof a pressing portion that presses a valve, and having at a rear end thereof a supported portion that is continuously supported swingably by a support member without floating upward; a sub arm which is disposed next to the main arm, which has a tip end to which a roller contacting a cam is rotatably attached, in which a center of the roller is located rearward of the pressing portion and forward of a swing center of the supported portion, which has a rear end that is swingably supported with respect to the main arm by a support pin, and in which a center of the support pin is located rearward of the center of the roller and forward of the swing center of the supported portion; and a switch pin that is inserted in a central portion of the roller, and that can be shifted between a coupling position where the sub arm is coupled to the main arm so as not to allow the sub arm to swing relative to the main arm, and a non-coupling position where the coupling between the sub arm and the main arm is released.