Patent ID: 7140334
Filing Date: 2006-11-28
Classification: F01L,F02B

Abstract:
1. A valve train for an internal combustion engine comprising: a plurality of cylinders having different valve mechanism constructions; a correcting member for correcting a difference in valve lift amount that is produced between the plurality of cylinders as a result of a difference in construction between valve mechanisms so as to make valve lift amounts of the plurality of cylinders substantially uniform; a cam profile of the camshaft provided on the one of the cylinders which is formed larger than a cam profile of a camshaft provided on the other cylinder in accordance with a difference in construction of the valve mechanisms; and switching members provided only on one of the plurality of cylinders for switching operating conditions of valves by selectively connecting follower rocker-arms actuated by a camshaft so as to actuate the valves and actuating rocker-arms corresponding to cams, wherein the correcting member is a difference in cam profile that is provided to correspond to the difference in construction or rigidity of the valve mechanisms, and wherein a change in in-cylinder pressure generated by a difference in valve lift amount between the plurality of cylinders is corrected by making a cam profile of a cylinder provided with the switching members large.