Method for testing jitter and slippage of belt of engine gear train and swinging angle of tension roller

A test method and engine technology, applied in the field of slippage and tensioner swing angle, and testing the vibration of engine gear belts, can solve problems such as lack of performance, achieve the effect of preventing abnormal noise and failure, and saving time and cost

Active Publication Date: 2013-01-02
DONGFENG CUMMINS ENGINE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the assessment of the front end of the engine uses durability tests to verify its performance. There is no systematic test method to evaluate its performance in the early stage.

Method used

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  • Method for testing jitter and slippage of belt of engine gear train and swinging angle of tension roller
  • Method for testing jitter and slippage of belt of engine gear train and swinging angle of tension roller
  • Method for testing jitter and slippage of belt of engine gear train and swinging angle of tension roller

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Embodiment Construction

[0020] figure 1 It is a schematic diagram of the test gear train of the present invention: 1-crankshaft pulley 2-fan pulley 3-generator 4-water pump 5-automatic tensioner 6-belt, the embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] figure 2 It is a schematic diagram of the swing angle of the tensioner wheel movement of the present invention: 5a is the tensioner wheel mounting seat, 5b is the tensioner wheel, θ is the swing angle of the tensioner wheel, and r is the swing radius of the tensioner wheel.

[0022] 1: Test method for the jitter of the front wheel train belt of the engine:

[0023] see figure 1 , Test the amount of belt vibration D between the crankshaft pulley 1 and the fan pulley 2.

[0024] When the engine is stopped, the maximum span of the belt in the entire wheel train is taken as the test object, and a test mark is made at the middle position of the test belt.

[0025] Take the mi...

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Abstract

The invention provides a method for testing the jitter and slippage of a belt of an engine gear train and a swinging angle of a tension roller. The belt jitter quantity D of belt gears can be obtained by adopting a laser displacement sensor to acquire the belt jitter displacement of a belt middle position between the belt gears; a laser rotation speed sensor is utilized to test the rotation speed VDriver of a driving gear and the rotation speed VDriven of a driven gear, and the belt sliding rate S of the driven gear is calculated through the formula as shown in the specification, wherein VDriver is the rotation speed of the driving gear of the gear train, VDriven is the rotation speed of the driven gear of the gear train, and I is the transmission ratio of the driving gear and the driven gear; subsequently a laser acceleration sensor is utilized to acquire an acceleration time domain signal in the swinging direction of the tension roller, the acceleration time domain signal is obtained through fast Fourier transform, the peak value, namely, the amplitude value A, and the frequency f at the peak value are found out; and the maximum swinging angle theta of the automatic tension roller is calculated according to a formula as shown in the specification.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, and in particular relates to a method for testing engine wheel train belt vibration, slippage and tensioner swing angle. Background technique [0002] At present, with the continuous development of technology in the automotive field, the engine drive train is becoming more and more complex. While meeting the OEM vehicle layout, cooling and transmission ratio requirements, it must also meet the reliability requirements of the front-end wheel train. Most of the assessment of the front end of the engine uses durability tests to verify its performance, and there is no systematic test method to evaluate its performance in the early stage. In order to effectively prevent abnormal phenomena such as motion interference, slipping, and abnormal noise of the front-end wheel train belt in the early stage of engine wheel train development, and to check whether it meets the requirements for reliabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 宋单平王勇许超
Owner DONGFENG CUMMINS ENGINE
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