Hydraulic power steering control system for new energy automobile and control method of hydraulic power steering control system

Abstract

The invention relates to the field of new energy automobiles, in particular to a hydraulic power steering control system for a new energy automobile and a control method of the hydraulic power steering control system. The hydraulic power steering control system for the new energy automobile comprises an integrated motor controller, an integrated dual-motor power assisting motor, an electro-hydraulic power steering pump assembly, an overrunning coupler and a vehicle control unit, wherein the integrated motor controller comprises an AC motor controller and a DC motor controller; the integrated dual-motor power assisting motor comprises a high-voltage AC motor and a DC brush motor, and a rotor of the high-voltage AC motor is connected with a rotor of the DC brush motor through the overrunning coupler; the output of the integrated dual-motor power assisting motor is connected with the electro-hydraulic power steering pump assembly; and the integrated motor controller is used for converting the mode that the high-voltage AC motor provides power-assisted steering into the mode that the DC brush motor provides power-assisted steering when the vehicle control unit acquires abnormal information sent by the automobile.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a control system and a control method for a hydraulic power steering of a new energy vehicle. Background technique [0002] The electro-hydraulic power steering system is a key component of the vehicle, which is directly related to the handling, stability and safety of the vehicle. The electrohydraulic power steering system in the prior art is generally mainly composed of an energy storage mechanism, a frequency conversion controller, an electrohydraulic power steering pump assembly, a hydraulic oil tank, and a steering gear. The frequency conversion controller outputs an AC voltage with variable frequency to drive the electrohydraulic power steering system. The power steering pump assembly uses the hydraulic pump of the electrohydraulic power steering pump assembly to make the fluid in the hydraulic oil tank flow to the steering gear at a flow rate to provide power for the ste...

AI Technical Summary

Problems solved by technology

[0004] The existing processing technology includes adding an emergency protection power supply DC-DC (low voltage to high voltage) converter, and adding a power circuit to the traditional electro-hydraulic power steering control system. Not only is the cost high, the volume is large and the layout is inconvenient, but the system can only There are limitations in the use of vehicles with a voltage platform above 400v. Once there is a problem with any of the booster controller and booster motor, its emergency protection function will fail, and the problem cannot be solved at the root; secondly, add accumulator and pressure maintaining valve mechanism technology , store a certain amount of high-pressure oil in the accumulator, release it when there is a power boost emergency, and provide a certain running time for steering, but there is insufficient energy, and it cannot meet the normal power boost operation requirements in an emergency under high load, so the root cause cannot solve this problem Help with emergency issues

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