The invention discloses a double-motor electric power-assisted steering system and a power-assisted steering method thereof. A main assisting motor and an auxiliary assisting motor in the steering system are connected through a one-way clutch assembly; an output shaft of the one-way clutch assembly is connected with a steering shaft connected to the lower portion of a steering wheel in parallel through a torsion coupler, and the output end of the torsion coupler is connected with a steering gear; the output shaft of the one-way clutch assembly is connected with the torsion coupler through a speed reducer, an overload protector and a normally closed electromagnetic clutch; the output end of a steering wheel torque and angle sensor, the control end of the main assisting motor, the control end of the auxiliary assisting motor and the control end of the normally closed electromagnetic clutch are connected with a control unit. The double-motor electric power-assisted steering system is provided with the two assisting motors which are connected through the one-way clutch assembly, controls a single assisting motor or the two assisting motors to simultaneously output torque through the control unit according to vehicle speed signals and steering wheel angle and toque signals, meets the requirement of commercial vehicles and the other vehicles for large assisting toque, improves fuel economy for the commercial vehicles, and reduces the operation cost.


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    Title :

    Double-motor electric power-assisted steering system and power-assisted steering method thereof


    Contributors:
    LI YAOHUA (author) / ZHAO WENLIANG (author) / JIAO SEN (author)

    Publication date :

    2015-06-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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