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Automatic transmission oil pump monomer reliability testing method

A technology of automatic transmission and test method, which is applied in the test of machine/structural components, the test of machine gear/transmission mechanism, instruments, etc., can solve the problem of no test assessment method, etc., and achieves low overall test cost, reduced project consumption time, The effect of shortening the test period

Active Publication Date: 2013-09-25
HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching, there is no relevant test assessment method at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Endurance test cycle conditions

[0030] This test method is to simulate the reliability of the transmission oil pump when the 4-speed automatic transmission is mounted on a real vehicle and travels about 200,000 kilometers. The oil temperature is controlled in the high temperature range of 110°C. The outlet pressure of the oil pump is controlled based on the main oil pressure of each gear of the transmission, and the maximum value among each model is selected for control. During the process, the pump discharge flow is measured to judge whether the performance of the oil pump is normal. The specific test process is divided into three steps:

[0031] Step 1: Simulate the process of full throttle acceleration and coasting deceleration of a real vehicle and add manual shifting,

[0032] Starting from the idle state of neutral gear at 700 rpm, the transmission shifts into the first gear, the shifting process lasts for 3 seconds, maintains the idle speed state for 1 sec...

Embodiment 2

[0050] (1) Endurance test cycle conditions

[0051] This test method is to simulate the reliability of the transmission oil pump when the 4-speed automatic transmission is mounted on a real vehicle and travels about 200,000 kilometers. The oil temperature is controlled in the high temperature range of 120°C. The outlet pressure of the oil pump is controlled based on the main oil pressure of each gear of the transmission, and the maximum value among each model is selected for control. During the process, the pump discharge flow is measured to judge whether the performance of the oil pump is normal. The specific test process is divided into three steps:

[0052] Step 1: Simulate the process of full throttle acceleration and coasting deceleration of a real vehicle and add manual shifting,

[0053] Starting from the idle state of neutral gear at 800 rpm, the transmission shifts into the first gear, the shifting process lasts for 3 seconds, maintains the idle speed state for 1 sec...

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PUM

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Abstract

The invention relates to an automatic transmission oil pump monomer reliability testing method. The method comprises the following steps of: (1) simulating full throttle acceleration and sliding deceleration of the vehicle and adding to a manual gear shifting process; (2) simulating 10-20% of throttle state of the vehicle and accelerating the vehicle to a certain speed; and then accelerating the vehicle by fully opening the throttle; and finally loosening the throttle for deceleration; and (3) simulating the 45-60% of throttle state of the vehicle and accelerating the vehicle to a certain speed; and then fully loosening the throttle and fully opening the throttle for urgent acceleration so that the gear of the transmission rises and falls in sequence or jumping way; and finally, loosening the throttle for deceleration, wherein the first step is repeated for 3000 times, the second step is repeated for 1500 times, the third step is repeated for 3000 times and the three steps are alternately carried out according to a certain sequence in the whole testing process according to the frequencies of the three steps in the real vehicle state and the vehicle durability testing method. The automatic transmission oil pump monomer reliability testing method provided by the invention has the advantages of reasonable design, lower comprehensive cost and relatively reduced period; the oil pump bursting flow is monitored in the testing process and the oil pump is decomposed and detected after the testing is finished.

Description

technical field [0001] The invention relates to a test method for evaluating the reliability of an automatic transmission oil pump unit. Background technique [0002] At present, due to the late start of automatic transmission in my country, there are almost no test standards related to automatic transmission assembly and single parts. In the 2010 edition of "Compilation of Automobile Standards", there is no relevant assessment method for the durability of automatic transmission oil pumps. After retrieval, there is no relevant test assessment method at home and abroad. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the above-mentioned technologies, and provide a single reliability test method of an automatic transmission oil pump with reasonable design, low comprehensive cost and relatively shortened cycle. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007G01M13/02
Inventor 方立辉辛海霞
Owner HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD