Abstract

The present invention addresses the problem of providing an internal combustion engine valve lift adjusting device with which flexible valve lift control is possible, and with which it is also possible to solve problems such as the occupied space resulting from a plurality of cams.　An internal combustion engine valve lift adjusting device according to the present invention includes a camshaft (10) axially supported with freedom to rotate in a cylinder head of the internal combustion engine, and a cam (14) which is disposed on an outer circumference of the camshaft (10), and which is provided in such a way as to act on an intake/exhaust valve (28) provided in the cylinder head, characterized in that the cam (14) is capable of sliding relative to the cylinder head in the axial direction of the camshaft (10), and opening and closing of the intake/exhaust valve (28) is controlled in accordance with the shape of a cam outer peripheral surface (16) of the cam (14), said shape varying continuously and in a stepless manner in conjunction with the movement of the camshaft (10) in the axial direction.

IPC Classes  ?

• F01L 13/00 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
• F01L 1/30 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of positively opened and closed valves, i.e. desmodromic valves