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Comprehensive performance test rig of vehicle electric power steering system

An electric power steering and system integration technology, applied in the direction of vehicle steering/jump performance, etc., to achieve real-time vehicle dynamics simulation environment and good real-time performance

Active Publication Date: 2014-05-14
ZF AUTOMOTIVE TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, domestic EPS system performance testing devices can only test a single type of EPS system, most of which are column-type electric power steering systems (C-EPS for short). With the rapid development of electric power steering, pinion-type electric power steering systems (referred to as P-EPS) and rack-type electric power steering system (referred to as R-EPS) also require a large number of performance tests

Method used

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  • Comprehensive performance test rig of vehicle electric power steering system
  • Comprehensive performance test rig of vehicle electric power steering system
  • Comprehensive performance test rig of vehicle electric power steering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Functional test of C-EPS

[0044] First, adjust the seventh handwheel 8, the fifth handwheel 21, and the sixth handwheel 22 respectively to place the turntable 2 at the test position, then fix the C-EPS tested prototype on the C-EPS tooling fixture 16, and the input drive It is connected with the C-EPS tested prototype by a sliding spline, and the C-EPS output loading device is connected with the C-EPS tested prototype by a double universal joint sliding connection. Adjust the third handwheel 23 to make the C-EPS loading assembly adjustment mechanism 24 rotate around the vertical direction, adjust the first handwheel 9 to change the pitch angle of the adjustment mechanism, adjust the handwheel 10 to change the pitch angle of the fixture plate 18, adjust the second The hand wheel 17 changes the vertical height of the C-EPS fixture 16 to ensure that the C-EPS tested prototype, the input drive, and the output rotary loader are in a straight line.

[0045] Af...

Embodiment 2

[0046] Embodiment 2: Functional test of P-EPS

[0047] The function test of P-EPS or R-EPS uses the loading device at the output end of P / R-EPS, which is a linear loader. Firstly, the P-EPS or R-EPS prototype 32 to be tested is installed on the jig table 7 , and the fifth hand wheel 21 is adjusted to place the rotary table 2 in the direction of the jig table 7 . The input driver is connected with the P-EPS or R-EPS tested prototype 32 by sliding splines. The loading device at the output end of the P / R-EPS loads the P-EPS or R-EPS sample machine 32 to be tested through the tie rod 33 .

[0048] After the installation is completed, operate the industrial computer, open the P / R-EPS performance test software, and select the function test. At this time, the first loading servo motor 15 of the loading device at the output end of the P / R-EPS will follow the vehicle speed given by the motion control card. The changing load signal is loaded, and the driving servo motor 6 of the input d...

Embodiment 3

[0049] Embodiment 3: Driver's power steering feel test

[0050] Adjust the third hand wheel 23 to rotate the C-EPS loading assembly adjustment mechanism 24 so that the loading device at the output end of the C-EPS faces the manual input device 34, and connect the manual input device 34 to the loading device at the output end of the C-EPS through the sliding spline connect.

[0051] After the installation is completed, operate the industrial computer, open the C-EPS performance test software, and select the driver's steering power-assisted feel test. At this time, the driver can feel the power-assisted feel of the steering gear to be tested by operating the steering wheel. At the same time, the first display shows the curves of the torque sensor voltage and the driving motor current changing with time.

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Abstract

The invention provides a comprehensive performance test rig of a vehicle electric power steering system. The comprehensive performance test rig includes a rack part, an electric control part and a computer control system; and the rack part comprises a base, a rotary table, a fixture clamp plate, a C-EPS fixture clamp, an input terminal driver, a C-EPS output terminal loading device, a P / R-EPS output terminal loading device, a fixture clamp bench, and an adverse impact part. The comprehensive performance test rig of the invention can comprehensively test three types of electric power steering systems, wherein the three types include a C-EPS, a P-EPS and an R-EPS. Compared with a conventional electric power steering test rig, the control system has good real-time performance, can provide the real-time vehicle dynamics simulation environment, and can provide the comprehensive high-precision multiple performance tests of three types of the EPS.

Description

technical field [0001] The invention belongs to the technical field of automobile chassis performance testing equipment, and in particular relates to an automobile electric power steering test bench. Background technique [0002] Electric Power Steering (EPS for short) technology is a new technology in the field of automobile steering in the past ten years, and has achieved considerable development abroad. EPS is also a research hotspot in the domestic steering industry. EPS is a safety component of a car, and its performance is directly related to the safety and reliability of the car, as well as the convenience and sensitivity of the driver. A comprehensive test of the performance of each component of the system is an important link in the assembly, factory inspection and maintenance of the automotive electric power steering system. How to test the performance of the EPS system and evaluate the EPS control strategy in the laboratory environment is a problem that researche...

Claims

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Application Information

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IPC IPC(8): G01M17/06
Inventor 唐斌江浩斌赵回袁朝春马世典华一丁
Owner ZF AUTOMOTIVE TECH SHANGHAI CO LTD
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