Durability testing method for an automobile automatic transmission

A technology of automatic transmission and testing method, which is applied in vehicle testing, machine/structural component testing, machine gear/transmission mechanism testing, etc. It can solve the problem that the reliability of test results needs to be improved, the test items are not comprehensive enough, and the performance of automatic transmission cannot be solved. Comprehensive analysis of testing and other issues, to achieve accurate analysis and judgment, and enhance the effect of reliability

Inactive Publication Date: 2018-09-11
JIANGLING HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, the purpose of the present invention is to solve the existing automatic transmission test method in the prior art, its test items are not comprehensive enough, it is impossible to provide a very comprehensive analysis test for the overall performance of the automatic transmission, and the reliability of the test results issues that still need to be improved

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  • Durability testing method for an automobile automatic transmission

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Embodiment 1

[0034] In order to solve this technical problem, the present invention proposes a kind of durability test method of automatic transmission of automobile, please refer to figure 1 , for the durability testing method of the automobile automatic transmission that the first embodiment of the present invention proposes, comprise the steps:

[0035] S101. When controlling the automobile to test the automatic transmission according to a preset test procedure, obtain the relevant attribute parameters of the automobile, wherein the preset test procedure includes a plurality of continuous unit test steps, and the relevant attribute parameters are at least Including engine speed, engine torque, vehicle speed, four-wheel speed, throttle opening, longitudinal acceleration, lateral acceleration, main oil pressure and transmission oil temperature.

[0036] As mentioned above, the preset test program includes multiple unit test steps. In this embodiment, multiple continuous unit test steps ca...

Embodiment 2

[0059] The solution of the present invention will be described in more detail below with a specific example. Firstly, test the automatic transmission of the car according to the preset test procedure. Among them, a complete test program includes the following test steps:

[0060] 1. Control the car in the N gear state, the engine is running at idle speed, the vehicle is stationary under the brake state, then control the car to switch to the D gear, release the brake, and the vehicle accelerates to 48kph under the full throttle state and then brakes to stop.

[0061] 2. Control the car in the N gear state, keep the vehicle still, then control the car to switch to the D gear, release the brake after 1.5 to 2 seconds, accelerate to 112kph under full throttle and then brake to stop;

[0062] 3. Control the car in the N gear state, keep the vehicle stationary, control the car to switch to the D gear, release the brake after 1.5 to 2 seconds, and accelerate to 80kph under full thro...

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Abstract

The invention discloses a durability testing method for an automobile automatic transmission. The method includes the following steps: when a vehicle is controlled to test an automatic transmission according to preset test procedures, obtaining related attribute parameters of the vehicle, wherein the preset test procedures include a plurality of continuous unit test steps, and the related attribute parameters include at least engine speed, engine torque, vehicle speed, four-wheel speed, throttle opening, longitudinal acceleration, transverse acceleration, main oil pressure and gearbox oil temperature; controlling the vehicle to repeatedly carry out tests according to preset frequencies and in accordance with the preset test procedures, and judging whether the obtained related attribute parameters are within respective corresponding preset ranges after the tests with the preset frequencies are finished; and if the obtained related attribute parameters are within respective correspondingpreset ranges, determining that the automatic transmission meets durability criteria. According to the durability testing method provided by the invention, the performance of the automatic transmission can be analyzed and judged more accurately and the reliability of a test result can be improved.

Description

technical field [0001] The invention relates to the technical field of automobile performance testing, in particular to a durability testing method for automatic transmissions of automobiles. Background technique [0002] With the development of the economy and the advancement of technology, the number of cars owned by urban residents is increasing rapidly. People also put forward higher requirements for the comfort when riding in a car, so how to improve the overall safety performance and comfort of the car has become the most important research direction for automotive engineers. [0003] For automobiles, the automatic transmission is a key component of the automobile, its structure is complex, and the probability of failure is higher than that of a manual transmission. Therefore, before the transmission is used, it is necessary to carry out an off-line test on the transmission. The purpose of the off-line test is to detect whether the automatic transmission is qualified ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01M17/007
CPCG01M13/02G01M17/007
Inventor 方惺生胡学明李锐
Owner JIANGLING HLDG
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