Method and device for improving abnormal sound of electric power steering system and automobile
A technology of electric power steering and abnormal noise, which is applied in the direction of electric steering mechanism, power steering mechanism, steering mechanism, etc. It can solve the problems of affecting driving comfort and easy generation of abnormal noise in the electric power steering system, so as to improve comfort and improve The effect of abnormal sound
Active Publication Date: 2020-05-19
BAIC MOTOR CORP LTD
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Problems solved by technology
[0004] In the worm gear structure, due to the processing accuracy of the worm gear and the worm, as well as the wear and tear during long-term use, there is an meshing gap between the worm gear and the worm. Steering system is prone to abnormal noise, affecting driving comfort
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[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044] figure 2 The flow chart of the method for improving the abnormal sound of the electric power steering system provided by the embodiment of the present invention. Such as figure 2 As shown, this embodiment provides a method for improving the abnormal noise of the electric power steering system, and the specific steps of the method are as follows:
[0045] S101. Acquiring a bump degree parameter of the steering gear during the running of the vehicle. ...
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The invention provides a method and device for reducing abnormal sounds of an electric power steering system and an automobile. By obtaining bumping degree parameters of a steering gear in the automobile running process, a compensating current value of a motor for driving a worm is obtained according to the bumping degree parameters of the steering gear and a pre-obtained worm gear and worm meshing clearance in the electric power steering system; and according to the compensating current value, the motor is controlled to drive the worm to reversely rotate in advance to be stably meshed with aworm gear without impact before the worm and the worm gear reversely move relative to each other in the automobile bumping process. According to the method and device for reducing the abnormal soundsof the electric power steering system and the automobile, when it is detected that the automobile runs on an uneven road surface and the worm gear and the worm have reverse movement tendencies, the motor drives the worm to rotate for a certain idle stroke in advance so as to get over the worm gear and worm meshing clearance in advance so that the gear side is not impacted or the impact stroke is reduced; and therefore, the abnormal sounds caused by reverse impact are improved, the automobile NVH quality is improved, and the taking comfort is improved for users.
Description
technical field [0001] The invention relates to the technical field of automobile engineering, in particular to a method and device for improving abnormal noise of an electric power steering system and an automobile. Background technique [0002] Electric Power Steering (EPS) has gradually become popular in modern vehicles due to factors such as compact structure, energy saving and emission reduction, and rich adjustment functions. However, in practical applications, the abnormal noise of the electric power steering system has gradually become the focus of people's attention. [0003] Electric vehicle power steering system is divided into control part and transmission part, such as figure 1 As shown, the control part measures the torque applied by the driver on the steering wheel shaft 104, the motor 103 of the transmission part rotates, drives the worm in the worm gear mechanism 102 to rotate through the claws and buffer pads, and drives the worm meshed with the worm throu...
Claims
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IPC IPC(8): B62D5/04B62D3/04
CPCB62D3/04B62D5/0463
Inventor 梁阿南
Owner BAIC MOTOR CORP LTD