Patent ID: 9732641
Date: 2017-08-15
CPC Classifications: F01L

Claim:
1. A variable valve mechanism of an internal combustion engine, the variable valve mechanism comprising: a rocker arm that includes a roller arm including a roller that rotatably abuts against a cam and a side arm provided at a side of the roller arm, and that drives a valve; and a switching device that includes a switching pin and a hydraulic chamber provided inside the rocker arm, and that switches a drive state of the valve by displacing the switching pin between a coupling position at which the switching pin extends between the roller arm and the side arm and a non-coupling position at which the switching pin does not extend between the roller arm and the side arm based on variations in hydraulic pressure in the hydraulic chamber, wherein the roller arm includes an inner arm provided on an inner side of the side arm in a width direction, wherein the side arm includes an outer arm provided on both outer sides of the roller arm in the width direction, and the side arm does not include a roller, wherein the switching pin is provided on an axis of the roller, and the hydraulic chamber is provided inside the roller arm which includes the inner arm.