The invention discloses an electric power steering system. The electric power steering system comprises a steering power pump, a high-voltage power supply, a blocking diode, a booster, a low-voltage power supply and a voltage monitoring and controlling system, wherein the high-voltage power supply is used for driving the steering power pump; the blocking diode allows electric currents between the high-voltage power supply and the steering power pump to pass through; the booster is electrically connected with the steering power pump; the voltage monitoring and controlling system comprises a voltage monitor, a complete vehicle controller and a controller, wherein the voltage monitor is used for monitoring a voltage between the high-voltage power supply and the steering power pump so as to obtain a first voltage value; the complete vehicle controller is used for monitoring the voltage between the high-voltage power supply and the steering power pump so as to obtain a second voltage value; when the first voltage value or the second voltage value is smaller than a pre-set voltage value, the controller gives out an enable signal to the booster, and the booster raises the voltage provided by the low-voltage power supply to the working voltage of the steering power pump so as to drive the steering power pump. According to the electric power steering system disclosed by the invention, when a high-voltage failure or line failure appears, the normal work of the steering pump can be maintained within a definite time.
Electric power steering system
2016-02-24
Patent
Elektronische Ressource
Englisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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