Vehicle engine water pump belt pulley test design method

A technology for a water pump pulley and an automobile engine, applied in the field of automobiles, can solve the problems of the failure of the water pump pulley and the inability to accurately reflect the fatigue performance of the water pump pulley, and achieve the effect of accurately reflecting the fatigue performance and avoiding insufficient test detection.

Pending Publication Date: 2022-01-28
CHONGQING CHANGAN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

However, the test parameters are usually determined based on the experience of engineers, which cannot accurately reflect the fatigue performance of the water pump pulley, and may easily lead to failure of the water pump pulley during the test on the entire vehicle

Method used

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  • Vehicle engine water pump belt pulley test design method
  • Vehicle engine water pump belt pulley test design method
  • Vehicle engine water pump belt pulley test design method

Examples

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] Such as figure 2 The automotive engine water pump pulley test design method shown in , which includes S101 to S106, S201 to S202, S301 and S401.

[0025] S101, collecting the rotational speed of the water pump pulley and the force data of the water pump belt during the vehicle road test;

[0026] In practice, it is difficult to directly measure the above two data, and it is usually obtained by converting other data. Specifically, the rotational speed of the water pump pulley can be obtained by multiplying the crankshaft rotational speed of the engine obtained through the test by the rotation ratio, as shown in image 3 As shown, the speed of the water pump pulley is equal to the speed of the engine crankshaft multiplied by the transmission ratio two. For the belt force of the water pump belt, it is first necessary to test the force of the idler in the front-end a...

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Abstract

The invention relates to an vehicle engine water pump belt pulley test design method. The method comprises the following steps: acquiring the rotating speed of a water pump belt pulley and water pump belt force data during a whole vehicle road test; the collected rotating speed and belt force of the water pump belt pulley are merged into a plurality of specific rotating speeds, and the number of revolutions of each specific rotating speed and the corresponding belt force are recorded; adopting a finite element method to calculate the stress when the water pump belt pulley rotates by one circle at each specific rotating speed; calculating damage generated when the water pump belt pulley rotates for a circle at each specific rotating speed; calculating the damage generated by the water pump belt pulley at each specific rotating speed; calculating the total damage generated by the whole vehicle road test water pump belt pulley; setting the belt force of the single test; adopting a finite element method to calculate damage caused by one-circle rotation of the water pump belt pulley during single test; setting the rotating speed of the water pump belt pulley during single test; and calculating the test time of the water pump belt pulley single test. According to the invention, accurate rotating speed, belt force and test time of a single test can be obtained.

Description

technical field [0001] The invention relates to automobiles, in particular to an automobile engine water pump pulley test design method. Background technique [0002] The water pump pulley is an important part of the front-end accessory wheel train of the automobile engine. It is usually driven by the engine crankshaft through the belt to drive the water pump to ensure the normal operation of the engine's thermal management system. [0003] At present, the unit test of the water pump pulley generally adopts figure 1 In this way, the motor is used to directly drive the water pump pulley, and the fatigue performance of the water pump pulley is tested to meet the requirements by controlling the test parameters such as the speed of the water pump pulley, belt force, and running time. However, the test parameters are usually determined based on the experience of engineers, which cannot accurately reflect the fatigue performance of the water pump pulley, and may easily lead to fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F119/04G06F119/14
CPCG06F30/15G06F30/23G06F2119/14G06F2119/04
Inventor 徐发扬司庆九
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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