This research takes that the wheel side skid should be as short as possible when the front suspension of electric vehicle is in lift condition as aim function to study the riding comfort of electric vehicle.

This article analyses the malfunaction cause of 630EⅢ truck front suspension.

This paper demonstrated the effect of front wheel aligment angle on the character of the vehicle’ s running straight, and provided the measure of conrtoling front wheel aligment angle to make the vehicle run straight by analysiny the mechanisms of front suspension of Nissna D21 pickup.

This paper establishes the mathematical model for dual free double axle vehicles system with dynamic theory It makes a detailed analysis to the matching of inherent frequency of front/rear suspension Practical examples are give

Further, the method to determine reasonable thickness of roof coal is discussed and the mechanism of rooffall in head face is analyzed as well.