Patent ID: 7156059
Filing Date: 2007-01-02
Classification: F01L

Abstract:
1. A variable valve train apparatus for an internal combustion engine, comprising: a first rocker arm supported for rocking motion on a rocker shaft, said first rocker arm having one end side thereof provided with an operating portion that is in contact with a first cam on a camshaft, and another end side thereof connected to an intake valve or an exhaust valve; a second rocker arm disposed adjacent to said first rocker arm arid supported for rocking motion on the rocker shaft, said second rocker arm having one end side thereof provided with an operating portion that is in contact with a second cam of the cam shaft, said second cam having a cam shape different from that of the first cam; and a changeover mechanism provided between said first and second rocker arms for making changeover to establish or release a connection between said rocker arms, wherein part of said changeover mechanism provided on a side of said second rocker arm has its center substantially coinciding with a widthwise center of the operating portion of said second rocker arm.