This paper investigates the innovative design of an independent suspension that has invariable orientation parameters when the wheel is jumping up and down and a steering system that satisfies the Ackermann law in turning. With group theory, it first discusses the synthesis of kinematic chains of a rigid body guidance mechanism which can realize straight-line translation. Then, it synthesizes a symmetrical redundant suspension mechanism with constant orientation parameters. This kind of independent suspension should not only eliminate the shambling shocks induced by the jumping of wheels but also decrease the wear of tyres. A new steering mechanism that satisfies the Ackermann law during turning is also proposed to satisfy the straight-line motion of the suspension. Therefore, these kinds of independent suspension can be used as both front and rear suspensions. The steering system accompanying the rectilinear moving suspensions should greatly improve the ride and handling properties of advanced automobiles.
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