Automatic transmission loading spectrum collecting and compiling method used for indoor bench test

A bench test and load spectrum technology is applied in the field of compiling and loading realization of the indoor bench test load spectrum for the automobile drive train, which can solve the problem that the test conditions are greatly different from the actual vehicle conditions, and the reliability test has no basis for compiling the spectrum. And other issues

Inactive Publication Date: 2014-03-26
CHONGQING ACADEMY OF SCI & TECH
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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

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  • Automatic transmission loading spectrum collecting and compiling method used for indoor bench test
  • Automatic transmission loading spectrum collecting and compiling method used for indoor bench test

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] A method for collecting and compiling a load spectrum of an automobile transmission system for an indoor bench test, the method comprising the following steps:

[0038] 1) Obtain the real vehicle working condition signal (such as figure 1 As shown in the figure: 1—the torque signal of the left and right half shafts output by the transmission, 2—the engine speed signal, 3—the throttle opening signal, 4—the clutch travel signal, 5—the transmission oil temperature signal, 6—the gear position signal, 7—the vehicle speed history signal obtained by the wheel ABS system):

[0039] 1.1) Paste the strain gauges on the left and right half shafts of the transmission output, use the full bridge method to obtain the torque signal, and use the RF telemetry system to send the collected torque signal to the data collector through wireless...

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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...

Claims

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Application Information

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IPC IPC(8): G01M17/007
Inventor 李文礼易鹏余勇刘万伟王晶晶
Owner CHONGQING ACADEMY OF SCI & TECH
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