DCT finished vehicle gearshift cycle endurance testing method

Abstract

The invention provides a DCT finished vehicle gearshift cycle endurance testing method, which comprises the steps of: step 1, performing static checking and dynamic evaluation on a DCT transmission ofa finished vehicle before the test; step 2, in the test phase, running the finished vehicle according to a set working condition curve on a chassis dynamometer till a test requirement is met, and recording data in the test process; step 3, and finally performing dynamic evaluation on the DCT transmission of the finished vehicle again, dismantling a transmission box, and checking an internal damage situation. The DCT finished vehicle gearshift cycle endurance testing method aims at the finished vehicle provided with the DCT, performs the static and dynamic evaluation before the test, then runsthe finished vehicle according to the specific cycle curve on the chassis dynamometer till the test requirement is met, and finally performs dynamic evaluation and dismantles the transmission box, soas to achieve the purpose of conducting special item verification on the DCT, thus the DCT is not limited to constraints of road conditions, the DCT can be subjected to rapid special item verification in a targeted manner, and the DCT finished vehicle gearshift cycle endurance testing method has the advantages of low cost, short verification cycle, problem focusing and the like when compared withroad tests.

Description

technical field [0001] The invention relates to the vehicle reliability test technology, in particular to the shift cycle durability test technology of a dual-clutch automatic transmission. Background technique [0002] Dual-clutch automatic transmission (DCT) is a mechanical automatic transmission that connects two input shafts through two clutches for power transmission. The transmission ratio can be changed without cutting off the power, thereby shortening the shifting time and effectively improving the shifting quality. With the development of automobile technology and the increasing quality requirements of consumers, the reliability of dual-clutch automatic transmissions is particularly important. [0003] At present, the current technical standards in the automotive industry usually inspect the reliability of the dual-clutch automatic transmission while inspecting the reliability of the entire vehicle through the road test of the entire vehicle. This test method is s...

AI Technical Summary

Problems solved by technology

This test method is subject to differences in road conditions, and it is not targeted at verifying the performance of the dual-clutch automatic transmission in advance because it is synchronized with other parts of the vehicle

[0004] In addition, there is another method of using a bench to perform a shift durability test on a single dual-clutch transmission. This method cannot simulate the actual shifting conditions during the driving of the vehicle.

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