A chain tension variable durability test bench and test method

Abstract

The invention discloses a chain tension variable durability test bench and a test method. The bench carries a plurality of high-pressure oil pumps, controls the injection quantity and the injection interval of each fuel injection valve through an ECU (electronic control unit), further drives the torque variation of each high-pressure oil pump, and finally, achieves the setting of the variable tension on a chain. Compared with the traditional engine reliability test bench, the bench in the invention can rapidly change the test conditions by using the ECU, superimpose and add the torque variation of the plurality of high-pressure oil pumps to the chain and achieve the chain drive torque variation, substantial variable frequency increase and variable setting, while approximately simulating actual operating conditions of an engine. In addition, a bench test method is proposed which shortens the chain durability test time and has the advantages of reducing equipment space, reducing equipment costs, and performing chain performance evaluation in a short time.

Description

technical field [0001] The invention relates to the technical field of chain transmission, in particular to a chain tension variable durability test bench and a test method. Background technique [0002] In recent years, chain transmission technology has been developed rapidly, and its application has also been extended to the field of automobile engines, especially in automobile transmission systems, transfer case systems, and automobile timing transmission systems. [0003] In view of the fact that reliability is an important indicator of automobile engines, the reliability evaluation of the chain has also become an important basis for evaluating the key performance of the chain. Different from the vehicle road test, engine full-speed and full-load test, engine variable speed and variable load test and other related tests carried out by the main engine factory, chain drive enterprises generally use engine simulation test benches to simulate the actual operating conditions ...

AI Technical Summary

Problems solved by technology

Although the limitation of using the engine to test is reduced to a certain extent, the disadvantage of high test cost

However, the actual bench realizes the loading of the chain drive system through the torque loader, which cannot fully reflect the torque influence of the fuel injection process on the high-pressure oil pumps, the reliability of the test results is weak, and the required test time is still long, sometimes as long as 1000 hours, seriously delayed the time period required for chain performance evaluation

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