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Switching control method of dual-source emergency electric power steering system

A technology of electric power steering and power assist system, which is applied in electric vehicles, fluid steering mechanisms, collectors, etc., can solve problems such as time flicker, achieve the effects of maintaining stability, solving time flicker, and avoiding time delay

Active Publication Date: 2018-01-23
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a switching control method of a dual-source emergency electric power steering system to solve the technical problem of time flicker in the switching of the existing dual-source emergency electric power steering system

Method used

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  • Switching control method of dual-source emergency electric power steering system
  • Switching control method of dual-source emergency electric power steering system

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Embodiment Construction

[0021] The specific implementation manners of the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0022] refer to figure 1 and figure 2 , a switching control method of a dual-source emergency electric power steering system, the dual-source emergency electric power steering system includes a vehicle controller 1, a high-voltage power assist system, a low-voltage power assist system, and a steering oil pump 2, and the high-voltage power assist system includes a power battery Group 3, DCAC controller 4 and high-voltage oil pump motor, the low-voltage booster system includes 24V battery 5, 24V emergency controller 6 and low-voltage oil pump motor. Wherein, the high-voltage oil pump motor and the low-pressure oil pump motor can be two separate motors, or the same double-winding motor 7, which is preferably a double-winding motor 7 in this embodiment.

[0023] refer to figure 1 , the DCAC controller 4 is respectively co...

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Abstract

The invention relates to a switching control method of a dual-source emergency electric power steering system. The dual-source emergency electric power steering system comprises a vehicle controller,a high-pressure booster system, a low-pressure booster system, and a steering oil pump. The high-pressure booster system comprises a power battery pack, a DCAC controller, and a high-pressure pump motor. The low-voltage booster system comprises a 24V battery, a 24V emergency controller, and a low-pressure oil pump motor. When the vehicle is running, the high-pressure booster system is turned on, and the 24V emergency controller monitors the rotation speed of the high-pressure pump motor and receives the enabling signal of the steering oil pump; when the current rotation speed of the high-pressure pump motor is less than the previous speed, and the speed difference is greater than the set threshold, and an enabling signal of the steering oil pump is still received, then it is determined that the high-pressure booster system is abnormal, and the 24V emergency controller automatically starts the low-pressure booster system to drive the steering oil pump, thereby achieving a smooth switching between the high and low pressure booster system to avoid the time delay caused by the process of sending the emergency start command by the vehicle controller.

Description

technical field [0001] The invention relates to the technical field of complete vehicle control of new energy vehicles, and more specifically refers to a switching control method of a dual-source emergency electric power steering system. Background technique [0002] At present, the mainstream dual-source emergency power steering system on the market usually adopts a dual-circuit power steering power system. One way is to provide DC power through the power battery pack, which is converted into AC power by the DCAC controller to drive the high-voltage power steering motor. The 24V battery provides DC power, and the low-voltage controller inverts the AC power to drive the low-power power steering motor. These two high and low voltage motors can use two independent motors or a coaxial double-winding motor to drive the same steering oil pump. [0003] In the existing control technology, the following two methods are usually used to start the emergency steering system: first, wh...

Claims

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Application Information

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IPC IPC(8): B62D5/06B62D5/30B60L1/00
Inventor 杨福清徐一凡宋光吉林靖方媛陈伟林浩群
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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