Based on requirements of the 4th Hunan province undergraduate engineering training integration ability competition, a carbon-free car which mainly composes of frame, power conversion mechanism, guide mechanism and transmission mecha- nism is designed in this paper. The design process of steering mechanism of the cylindrical cam is mainly elaborated ; and the adjustment method of trajectory error is exposited in detail through the trajectory simulation analysis with the solidworks soft- ware. Thus problems in designing, manufacturing and debugging the...