两种汽车主动转向机构的设计

In this paper, two different kinds of Active Front Steering (AFS) mechanism are discussed. The concepts of two design options are both to use differential gears to increase the degree of freedom, so the function of two input (input of the steering wheel and the electric motor), one output (output of the AFS system ) can be achieved. Then the transmission ratio can be changed according to the result of the ECU. Two design options can both guarantee the transmission ratio be fixed at 1:1 after the failure of the electric motor, and other parts of the existing steering mechanism do not need to be changed.