Patent ID: 8360018
Filing Date: 2013-01-29
Classification: F01L,Y10T

Abstract:
1. A V-type internal combustion engine with a variable valve train which uses an actuator to vary the phase/lift amount of a camshaft, the actuator being mounted on a head cover for each of a plurality of cylinder blocks arranged in a V-shape; wherein cylinder blocks are positionally offset from each other in the axial direction of the camshaft; and the actuator is mounted on a lateral surface positioned opposite the offset direction of the head cover, wherein the variable valve train includes a drive cam which rotates together with the camshaft, a valve cam which rotates relative to the camshaft and opens/closes an engine valve, a link mechanism which transmits the valve driving force of the drive cam to the valve cam, a holder member which supports a fulcrum of the link mechanism and is capable of swinging around the camshaft, and a drive mechanism which swings the holder member to vary the fulcrum position of the link mechanism, and varies the phase/lift amount of the camshaft in accordance with a swing position of the fulcrum of the link mechanism, wherein the drive mechanism includes a ball screw, which is positioned over an intake camshaft and an exhaust camshaft, the intake side of the ball screw being threaded in one direction and the exhaust side of the ball screw being threaded in another direction; a slider, which is provided for both the intake side and the exhaust side and capable of traveling along the ball screw; and a coupling link member, which is disposed between the slider and the holder member.