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A Torque Monitoring Method in Engine Reliability Test

A torque monitoring and engine technology, applied in the direction of engine testing, force/torque/power measuring instrument, machine/structural component testing, etc., can solve the problems of monitoring, not mentioning the engine, etc., to achieve a wide range of applications and ensure effective Good performance, timeliness and versatility

Active Publication Date: 2018-06-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"A dual-mass flywheel protection control method" disclosed in CN 105402040A is the prior art close to the present application, but does not mention how to monitor the torque of the engine at different speeds

Method used

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  • A Torque Monitoring Method in Engine Reliability Test
  • A Torque Monitoring Method in Engine Reliability Test
  • A Torque Monitoring Method in Engine Reliability Test

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] For example: based on the external characteristic data of a 1.0L naturally aspirated engine, according to the alternating load test conditions stipulated in GB / T 19055-2003 "Automobile Engine Reliability Test Methods" (see figure 1 ), combined with actual test data, introduces the calculation method of fitting torque and the setting method of torque monitoring.

[0026] The first step is the measured torque and the corresponding rotational speed; the measured torque T of the external characteristics of the engine is measured by a bench dynamometer with a speed step of 500r / min. tq实 and the corresponding speed n 实 , the data are as follows:

[0027]

[0028] The second step is to linearly transform the engine speed; the linear transformation formula is n 系 =n 实 / 500-2, where n 系 is the speed coefficient, a is the selected speed step, and b...

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Abstract

The invention relates to a torque monitoring method in an engine reliability test. The torque monitoring method comprises the following steps: 1) actually measuring torque and rotation speed corresponding to the torque; 2) carrying out linear transformation on the rotation speed of an engine; 3) determining a calculating formula of fitted torsion; 4) carrying out correction on the fitted torsion; 5) calculating the difference value between the fitted torsion and the actually-measured torque; 6) calculating alarm value z; and 7) setting torque monitoring parameters. The method can monitor the limit values of the torque of the engine under different rotation speeds, provides basis for setting the alarm value of the torque of the engine and realizes monitoring of the torque of the engine.

Description

technical field [0001] The invention relates to an engine, in particular to a torque monitoring method in an engine reliability test. During the bench reliability test of the engine machine, the engine torque is monitored. Background technique [0002] The engine reliability test is a test conducted to study failures and their effects, and to improve reliability. During the reliability test of the engine bench, in order to effectively observe and confirm the running state of the engine, it is necessary to monitor the relevant parameters of the engine. When these parameters exceed or fall below the limit value, it can alarm and stop in time, so as to prevent further damage to the engine. As an important index to measure the power of the engine, the engine torque has long been the object of our focus in the test process. However, due to the different engine torque limits at different speeds, people have been unable to effectively set the engine torque alarm. value, so as to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00G01L5/00
CPCG01L5/00G01M15/00
Inventor 郭亮余涛江宝宇卢良剑左云亮林绍峰
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD