Patent ID: 8042500
Filing Date: 2011-10-25
Classification: F01L,Y10T

Abstract:
1. A valve train for an internal combustion engine, comprising: a plurality of camshaft supports arranged on a support member included in the internal combustion engine; a camshaft supported on the camshaft supports and provided with valve operating cams for opening and closing engine valves included in the internal combustion engine; and a torque reducing mechanism for applying a counter torque to the camshaft to suppress torque fluctuation of the camshaft caused by reaction forces applied to the cams by the engine valves; wherein the torque reducing mechanism includes a rotating member that rotates together with the camshaft, and a counterforce applying member for applying a counterforce to the rotating member to apply a counter torque to the camshaft, and the counterforce applying member is supported on a connecting member connecting adjacent ones of the camshaft supports; wherein the counterforce applying member is a lever supported for rocking on the connecting member, the lever has an input arm and an output arm that rocks together with the input arm, a pressing device is provided to produce a force to be applied to the lever to press the lever against the rotating member, and the pressing device applies the force to the input arm such that the output arm is pressed against the rotating member to apply a counterforce to the rotating member.