Acquisition and Compilation Method of Automobile Driveline Load Spectrum for Indoor Bench Test

Abstract

The invention discloses an automatic transmission loading spectrum collecting and compiling method used for indoor bench test. The method comprises the following steps of 1, acquiring a real vehicle working condition signal; 2, inputting the asynchronously acquired signal into a data collector, converting an analog signal into a digital signal and then inputting the digital signal to a computer; 3, obtaining an engine torque signal by dividing the sum of torque values output by a transmission by the transmission ratio of the transmission; 4, carrying out data preprocessing on the engine torque signal by means of a rain-flow method; 5, carrying out extrapolating on the time domain of a loading spectrum; 6, dividing toques under a positive dragging working condition and an inverse dragging working condition into eight grades respectively; 7, calculating the rotating frequency of a flywheel and the occurrence frequency of a gear of the engine corresponding to each loading grade; 8, performing a program loading test method; 9, performing a random loading test method. The method effectively solves the problem that the indoor bench test is seriously deviated from the actual driving working condition of a vehicle due to the fact that compiling of the automatic transmission indoor bench test has no basis, and reasonably represents the loading working condition of the transmission on an indoor bench.

Description

technical field [0001] The invention relates to a method in the field of automobile load spectrum processing, in particular to a method for compiling and loading the indoor bench test load spectrum of the automobile transmission system. Background technique [0002] The reliability test of the automobile transmission system is an important means to assess and verify the durability of the transmission system. How to carry out a reasonable drive train reliability test that meets the user's operating conditions is an important issue faced by the automotive drive train parts industry. The components in the automobile transmission system are in a complex working state of randomly variable loads. There are many components in the automobile transmission system (including clutches, transmissions, and transmission shafts), and various forms of connections between them constitute a transmission system with relatively complex mechanical characteristics. chain. During the driving proc...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a method for collecting and compiling the load spectrum of the automobile transmission system for indoor bench tests that reasonably reproduces the operating conditions of the automobile transmission system, and solves the problem of indoor problems of the automobile transmission system. There is no basis for the compilation of the bench reliability test spectrum, and there is a big difference between the test working conditions and the real vehicle working conditions

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