Patent ID: 7007646
Filing Date: 2006-03-07
Classification: F01L

Abstract:
1. A valve gear with a cylinder suspending mechanism of an internal combustion engine, comprising: a first rocker arm having a tip end connected to either one of an intake valve and an exhaust valve and pivotably supported on a first rocker shaft; a second rocker arm located at one side of said first rocker arm, pivotally supported on said first rocker shaft, and driven by a first cam formed in a camshaft; a third rocker arm located at the other side of said first rocker arm, pivotally supported on said first rocker shaft, and driven by a second cam formed in the camshaft and having a cam shape different from said first cam; a first switching mechanism for switching connection and disconnection of said first rocker arm with respect to said second or third rocker arm; and control means for controlling the switching of said first switching mechanism, wherein said first switching mechanism includes a first piston slidably fitted into a first cylinder formed in said first rocker arm, a second piston slidably fitted into a second cylinder formed in said first rocker arm, a first engaging projection extending from said third rocker arm and formed to be engageable with said second piston, and a second engaging projection extending from said third rocker arm and formed to be engageable with said second piston; and said first and second pistons are switched between an engaging position and a non-engaging position with respect to said first and second engaging projections.