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A test method for dynamic characteristics of engine piston

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

Active Publication Date: 2022-08-09
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
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  • Application Information

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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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  • A test method for dynamic characteristics of engine piston

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Embodiment Construction

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

[0028] see figure 1 , the engine piston dynamic characteristics test method, which includes the following steps:

[0029] S1, complete the engine installation and debugging according to the bench test preparation requirements, use the bench blower to cool the engine oil, and the oil temperature does not exceed 140 ℃ during the whole test process. Engine coolant temperature is controlled by the bench water temperature regulation system.

[0030] After the engine is installed, run the engine in to ensure that the engine can work normally and all performances meet the requirements. Run-in is carried out for 90 minutes under running-in conditions, which include idle speed conditions, maximum torque point conditions, and maximum power point conditions. During the running-in process, observe whether the engine has three leaks, abnormal noises and abnormal oil pressure. I...

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Abstract

The invention discloses a method for testing the dynamic characteristics of an engine piston, which comprises the following steps: S1, measuring engine power, cylinder compression pressure, oil consumption, piston air leakage and piston wear in an initial state; S2, pressing the engine The bench test is carried out under the preset cycle conditions, and the air leakage of the engine piston is measured every 40~60 cycles; after the multiple cycle conditions are completed, the engine power, cylinder compression pressure, oil consumption, and piston air leakage are measured. S3, compare and analyze the measured data of S2 and S1, and determine whether the dynamic characteristics of the engine piston meet the requirements. It can effectively judge the dynamic characteristics of the engine piston and improve the engine piston test evaluation system.

Description

technical field [0001] The invention relates to engine performance testing, in particular to a method for testing engine piston dynamics. Background technique [0002] With the continuous improvement of the in-cylinder burst pressure and liter power of automobile engines in recent years, the mechanical and thermal loads 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 assessment 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 the piston under severe conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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