Patent ID: 6948465

Claim:
A variable valve mechanism for an engine, where the engine has: a rocker shaft which is arranged to a cylinder head; a camshaft which is arranged on the cylinder head in parallel with the rocker shaft and above the rocker shaft and has a first cam and a second cam which are different in cam profile from each other; a first rocker arm which is rotatably supported by the rocker shaft and is driven by the first cam, and which transmits a displacement of the first cam to a valve; and a second rocker arm which is rotatably supported by the rocker shaft in parallel to the first rocker arm and is driven by the second cam, wherein the variable valve mechanism has a switching mechanism which allows selective transmission of a displacement of the second rocker arm to the first rocker arm, the switching mechanism which is provided sideward of the camshaft, and the switching mechanism comprises: a first abutting portion which is provided on the first rocker arm; a second abutting portion which is provided on the second rocker arm and opposed to the first abutting portion with respect to rotational direction around the rocker shaft; and a switching element which is provided on one abutting portion of the first abutting portion and the second abutting portion, the switching element being displaceable to a first position where the switching element abuts on the other abutting portion of the first abutting portion and the second abutting portion to transmit displacement of the second rocker arm to the first rocker arm and a second position where the switching element does not abut on the other abutting portion.