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Method for testing dynamic characteristics of an engine piston

A technology of dynamic characteristics and testing methods, applied in engine testing, combustion engine, internal combustion engine testing, etc., can solve problems such as excessive air leakage, abnormal piston wear, excessive oil consumption, etc., to avoid major quality problems, process simple effect

Active Publication Date: 2021-02-02
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual situations, even if the piston has passed the thermal load test and mechanical load test verification, the piston will have quality problems in dynamic characteristics during the user's use, such as excessive air leakage, excessive oil consumption, and abnormal wear of the piston. etc. Therefore, it is necessary to carry out targeted experimental verification on the dynamics of the engine piston

Method used

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  • Method for testing dynamic characteristics of an engine piston

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] see figure 1 , the shown engine piston dynamics testing method, it comprises the steps:

[0029] S1. Complete the engine installation and commissioning according to the bench test preparation requirements, and use the bench blowing machine to cool the engine oil. During the whole test process, the oil temperature should not exceed 140°C. The engine coolant temperature is controlled by the bench water temperature regulation system.

[0030] After the engine is installed, run-in the engine to ensure that the engine can work normally and all performance meets the requirements. Carry out 90 minutes of running-in under the running-in condition, which includes the idling condition, the maximum torque point condition, and the maximum power point condition. During the running-in process, observe whether the engine has three leaks, abnormal noises and abnormal oil p...

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Abstract

The invention discloses a method for testing dynamic characteristics of an engine piston. The method comprises the following steps: S1, measuring the power of an engine, the compression pressure of acylinder, the engine oil consumption, the air leakage of the piston and the abrasion condition of the piston in an initial state; S2, performing a bench test on the engine according to a preset cyclecondition, and measuring the air leakage of a piston of the engine once every 40-60 times of cycle condition; measuring the power of the engine, the compression pressure of the cylinder, the engine oil consumption, the air leakage of the piston and the abrasion condition of the piston after multiple circulation working conditions are finished; and S3, comparing and analyzing the measurement data of the S2 and the S1, and judging whether the dynamic characteristics of the engine piston meet the requirements or not. The dynamic characteristics of the engine piston can be effectively evaluated, and an engine piston test evaluation system is perfected.

Description

technical field [0001] The invention relates to engine performance testing, in particular to a testing method for engine piston dynamics characteristics. Background technique [0002] With the continuous improvement of the explosion pressure and power per liter in the cylinder of automobile engines in recent years, the mechanical load and thermal load on the engine are also increasing significantly. As the core key component of the engine, the piston's thermal load, mechanical load and dynamic characteristics will directly affect a series of important indicators such as the reliability, durability, economy and emission of the engine. [0003] The reliability evaluation of the piston mainly includes: the thermal load of the piston, the mechanical load of the piston and the dynamic characteristics of the piston. The thermal load test of the piston is mainly used to judge the temperature of the piston, the mechanical load test of the piston is used to judge the reliability of ...

Claims

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Application Information

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IPC IPC(8): G01M15/06G01M15/04G01M15/02
CPCG01M15/06G01M15/044G01M15/046G01M15/048G01M15/02Y02T10/12
Inventor 王翀曾庆强谢琰
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD