Abstract

To develop new in-wheel-motor electric vehicle with compact chassis structure, using a double-wishbone suspension mechanism with zero toe-in fluctuation, a module structure composed of double-wishbone suspension with torsion bar, sensor, brake and in-wheel motor was presented, and a new method for analyzing and designing the stiffness and damping parameters of double-wishbone suspension with torsion bar was strictly derived. Then, the theoretical results above were successfully applied in the chassis development of new electric vehicles with four in-wheel motors, such as fuel cell mini-car with steer-by-wire, etc.

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