A steer by wire steering system for a vehicle includes a reaction force actuator 25, a steering actuator 28, a control unit 40, and a clutch 20, 120 that can selectively connect a steering wheel 11 with road wheels 3 to be steered. The control unit is configured to operate in an emergency mode when a failure is detected while the control unit is operating in a steer by wire mode. The emergency mode includes commanding the clutch to engage, terminating the steer by wire mode, performing a position keep control whereby the steering actuator is driven so as to maintain a fixed steering angle of the road wheels, initiating a power assist mode using the reaction force actuator, and once the clutch is fully engaged, terminating the position keep control.


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    Title :

    Steer by wire steering system


    Contributors:

    Publication date :

    2019-07-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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