Valve`s rotation movement characterizing method for internal combustion engine of motor vehicle, involves establishing variation curve of angular position of valve based on angular position of camshaft controlling valve

摘要

The method involves taking an image of a lower surface (3) of a valve (1) by a photographic camera (4), processing images by a computer (5), and placing two marks on the surface. Set of positions of one of the marks is recorded related to each one of angular positions of a camshaft. The computer then establishes a variation curve of angular position of the valve based on the angular position of the camshaft controlling the valve. An independent claim is also included for a device for characterizing and measuring angular displacement of a unit of motor vehicle, implementing a valve rotation movement characterizing method.