The invention discloses a double-motor electric power-assisted steering system and a power-assisted steering method of the system. A main power-assisted motor and an auxiliary power-assisted motor in the system are connected with a first torque coupler through a first normally-closed electromagnetic clutch and a second electromagnetic clutch; an output shaft of the first torque coupler is connected with a second torque coupler through a third electromagnetic clutch, and the output end of the second torque coupler is connected with a steering gear; and the output end of a steering wheel torque angle sensor, the control end of the main power-assisted motor, the control end of the auxiliary power-assisted motor, the control end of the first electromagnetic clutch, the control end of the second electromagnetic clutch and the control end of the third electromagnetic clutch are connected with a control unit. The two power-assisted motors which are connected with the torque coupler through the electromagnetic clutches are arranged and either or both of the power-assisted motor are controlled through the control unit to output torque or to output torques at the same time according to vehicle speed signals and steering wheel angle torque signals. The requirement of commercial vehicles and the like needing large power-assisted torques is met, and the fuel economy of the commercial vehicles is improved, and the operation cost is reduced.
Double-motor electric power-assisted steering system and power-assisted steering method thereof
08.07.2015
Patent
Elektronische Ressource
Englisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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