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Device and method for testing electronic power steering system of automobile

A technology of electronic power steering and power steering, which is applied in the field of EPS system testing and can solve problems such as difficulties in curve EPS performance testing

Inactive Publication Date: 2015-04-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also difficult to test the performance of curved EPS

Method used

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  • Device and method for testing electronic power steering system of automobile
  • Device and method for testing electronic power steering system of automobile
  • Device and method for testing electronic power steering system of automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A test device for an automotive electronic power steering system, a test device for an automotive electronic power steering system, comprising a base 7 with a horizontal upper surface, the upper surface of the base 7 is installed sequentially from the left end to the right end: a limit table I1, an elastic Component I2, first guide rod 18, rack and pinion steering gear I3, tension pressure sensor I5, rack and pinion steering gear II11, tension pressure sensor II10, second guide rod 22, elastic component II9 and limit platform II8. The rack and pinion steering gear I3 includes a gear I and a rack I19 that are installed in the cylinder I and mesh with each other. Both ends of the cylinder I are open, and the moving direction of the rack I19 is parallel to the upper surface. The cylinder body I is installed on the support I4, and the lower end of the support I4 is fixed on the upper surface of the base 7. The left end of the rack I19 is connected to the right end of the ...

Embodiment 2

[0047] The power assist characteristics of EPS are divided into the following three categories: linear power assist, broken line power assist and curved power assist. When performing EPS performance tests, it is necessary to provide corresponding curve resistance.

[0048] In this embodiment, the righting moment of the vehicle is derived by using parameters such as kingpin inclination angle and caster angle, and combined with the dynamic model to obtain the calculation formula of the loading force (resistance) as follows.

[0049] see figure 2 :

[0050] Angle of the outer wheel to the center of rotation of the vehicle:

[0051]

[0052] Rotation center angle of inner wheel to vehicle:

[0053]

[0054] Radius of the center of rotation of the outer wheel to the vehicle:

[0055]

[0056] Rotation center radius of inner wheel set vehicle:

[0057] ;

[0058] see image 3 :

[0059] Angle of the right wheel (inner wheel) relative to the kingpin...

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PUM

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Abstract

The invention aims to provide a device and a method for testing response of EPS (electronic power steering) under different steering resistance force actions, and discloses a device and a method for testing an electronic power steering system of an automobile. The device comprises a base. The base is provided with a horizontal upper surface, and a limiting table I, an elastic component I, a first guide rod, a rack and pinion steering gear I, a pull pressure sensor I, a rack and pinion steering gear II, a pull pressure sensor II, a second guide rod, an elastic component II and a limiting table II are sequentially mounted on the upper surface of the base from the left end to the right end of the upper surface of the base. The device and the method have the advantage that steering characteristics of the EPS under the effects of different rotation angles and automobile speeds can be measured by the device.

Description

technical field [0001] The invention relates to the field of mechanical device performance testing, in particular to EPS system testing. Background technique [0002] Electric Power Steering (EPS) relies on electric motors to provide assistance, and is a new type of electromechanical integrated power steering device. Because EPS has the advantages of simple structure, the best boosting effect changing with the speed of the vehicle, saving energy, protecting the environment, etc., it is currently widely used. [0003] The power assist characteristic curve of EPS refers to the relationship between the power assist torque of the electric motor (including magnitude and direction) and the steering wheel input torque, vehicle speed, front wheel air pressure, front axle axle load and other parameters. Generally, the steering wheel input torque, vehicle The two main parameters of driving speed can meet the control requirements. The power assist characteristic curve of the EPS det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/06
Inventor 余传祥彭冲谭稀石志亮刘和平邓力郑群英刘庆郭强熊亮
Owner CHONGQING UNIV
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