Abstract
In this paper is presented a general cinematic analysis of multicountour mechanisms. These kind of mechanisms are found in the composure of systems that modifies the height of heat engine valves. These can also be composed of cam-follower mechanisms in which the cam and the follower have a plane-parallel movement. Beginning with the structural aspects and continuing by extending the cinematic analysis methods for plane bar mechanisms and cam mechanisms, one obtains a nonlinear equation system. The equations are based on the contour conditions and also on the tangency in contact point (of the camfollower grooves) condition. Finally is obtained a nonlinearly equation system that is solvable through the Newton - Raphson method. Next are presented the determination relations for the velocities and accelerations of the cam-follower ensemble. In the end of the paper is presented the calculation algorithm proposed for the cinematic analysis of complex mechanisms with cams and bars.
Keywords: Cam, Follower, Positions, Velocities, Accelerations