Patent ID: 9181826
Filing Date: 2015-11-10
Classification: F01L

Abstract:
1. A variable valve mechanism of an internal combustion engine, the variable valve mechanism comprising: a main arm that is capable of swinging and that drives a valve when swinging; a first sub arm that is provided on one side in a lateral direction of the main arm and that swings when driven by a first cam provided on a camshaft so as to protrude from the camshaft; a second sub arm that is provided on an other side in the lateral direction of the main arm and that swings when driven by a second cam provided on the camshaft so as to protrude from the camshaft; and a switch device that performs switching between a first coupled state where only the first sub arm of the first and second sub arms is coupled to the main arm so as to be non-swingable relative to the main arm and the main arm to swing according to a cam profile of the first cam, and a second coupled state where only the second sub arm of the first and second sub arms is coupled to the main arm so as to be non-swingable relative to the main arm and the main arm to swing according to a cam profile of the second cam, wherein the switch device is configured to perform switching among a non-coupled state where neither the first sub arm nor the second sub arm is coupled to the main arm so as to be non-swingable relative to the main arm, the first coupled state, and the second coupled state, wherein the switch device includes: wherein the non-coupling hydraulic mechanism includes a non-coupling shaft oil passage formed in the rocker shaft, wherein the coupling hydraulic mechanism includes a coupling shaft oil passage formed in the rocker shaft, and wherein the non-coupling shaft oil passage is separated from the coupling shaft oil passage by a partition pin inserted in the rocker shaft.