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Electric power steering system, control method and automobile

An electric power steering and steering gear technology, applied in electric steering mechanism, power steering mechanism, steering mechanism, etc., can solve the problems of mechanical shock and noise, affecting the life of parts, etc., so as to reduce the impact and noise, improve the life and operation of parts The effect of comfort

Active Publication Date: 2017-12-22
BAIC MOTOR CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an electric power steering system, a control method and an automobile, which are used to solve the technical problems in the prior art that mechanical shock and noise are easily generated when the steering wheel is rotated to the limit position, and the life of the parts is affected.

Method used

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  • Electric power steering system, control method and automobile
  • Electric power steering system, control method and automobile
  • Electric power steering system, control method and automobile

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1 of the present invention provides an electric power steering system. figure 1 It is a structural block diagram of the electric power steering system provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the electric power steering system in this embodiment may include: a processor 1 and a motor 2;

[0068] The processor 1 is used to: obtain the rack stroke of the steering gear; determine whether the rack stroke of the steering gear is greater than the rack stroke threshold; if greater, reduce the current output to the motor 2 according to the rack stroke ;

[0069] The input end of the motor 2 is connected with the processor 1, and the output end is used for connecting with the steering gear, and is used for outputting torque to the steering gear under the control of current.

[0070] The electric power steering system in this embodiment, in addition to including the processor 1 and the motor 2, can also include a steering column,...

Embodiment 2

[0082] Embodiment 2 of the present invention provides an electric power steering system. Figure 4 It is a structural block diagram of the electric power steering system provided by Embodiment 2 of the present invention. Such as Figure 4 As shown, the electric power steering system in this embodiment may include: a processor 1, a motor 2, a torque sensor 3, a motor position sensor 4 and a reduction mechanism 5;

[0083] The torque sensor 3 is connected to the processor 1 for detecting the torque value of the steering wheel, and sending the detected torque value to the processor 1;

[0084] The motor position sensor 4 is connected to the processor 1 for detecting the angle of the motor 2, and sends the detected angle of the motor 2 to the processor 1;

[0085] The input end of the reduction mechanism 5 is connected to the output end of the motor 2, and the output end of the reduction mechanism 5 is used to connect with the steering gear; wherein, the reduction mechanism 5 ca...

Embodiment 3

[0125] Embodiment 3 of the present invention provides a control method for an electric power steering system. Figure 6 It is a flow chart of the control method of the electric power steering system provided by Embodiment 3 of the present invention. Such as Figure 6 As shown, the method in this embodiment may include:

[0126] Step 101, obtaining the rack stroke of the steering gear;

[0127] Step 102, judging whether the rack stroke of the steering gear is greater than the rack stroke threshold;

[0128] Step 103, if it is greater than, then reduce the current output to the motor according to the stroke of the rack.

[0129] The method in this embodiment can be implemented based on the electric power steering system described in any one of the above embodiments, and the execution subject can be a processor in the electric power steering system. For the specific implementation principles of the method in this embodiment, reference may be made to the foregoing embodiments,...

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Abstract

The invention provides an electric power steering system, a control method and an automobile. The electric power steering system comprises a motor and a processor; the processor is used for obtaining rack stroke of a steering gear; determining whether the rack stroke of the steering gear is larger than a rack stroke threshold value; if the rack stroke of the steering gear is larger than the rack stroke threshold value, reducing the current output to the motor according to the rack stroke; an input end of the motor is connected with the processor and an output end is used for connecting the steering gear and for outputting torque to the steering gear under the control of the current. According to the electric power steering system, the control method and the automobile, the torque output to the steering gear from the motor is reduced when getting close to a limit position, which effectively reduces impact and noise and increases service life of parts and comfort of operation.

Description

technical field [0001] The invention relates to the technical field of automobile communication, in particular to an electric power steering system, a control method and an automobile. Background technique [0002] With the advancement of electronic technology, the application of electronic products in automobiles is becoming more and more popular. The steering system is a series of devices used to change or maintain the direction of driving or reversing of the car. It has functions such as power assist with speed and active return to the center. It is one of the important parts of the car. [0003] There are two kinds of limit positions of the existing steering system: one is the limit position of the steering gear itself, and the other is limit by adding a mechanical limit sleeve or a limit ring. When the vehicle is turned at a large angle or parked into the garage, it is necessary to quickly turn the steering wheel to the limit position. Frequent operations at the left a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D5/04
CPCB62D5/0469
Inventor 龚代花
Owner BAIC MOTOR CORP LTD
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