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Test method for comprehensive transmission efficiency of automotive automatic transmission

A technology of automatic transmission and transmission efficiency, applied in the direction of machine gear/transmission mechanism testing, etc., can solve the problems of low efficiency and inaccuracy, achieve accurate test results and avoid human interference

Inactive Publication Date: 2015-04-22
JILIN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing test methods are mainly aimed at the structure of the automatic transmission itself, and do not include the influence of the shift control strategy and operating conditions on the transmission efficiency, which is not accurate enough
The transmission efficiency of different types of automatic transmissions is affected to different degrees by shift control strategies and operating conditions. Some automatic transmissions have high transmission efficiency under stable conditions, but their efficiency is significantly reduced under unstable conditions. Therefore, the transmission efficiency test It is necessary to formulate the operating conditions in line with the actual working conditions of the automatic transmission

Method used

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  • Test method for comprehensive transmission efficiency of automotive automatic transmission
  • Test method for comprehensive transmission efficiency of automotive automatic transmission
  • Test method for comprehensive transmission efficiency of automotive automatic transmission

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0029] Such as figure 1 Shown, the automobile automatic transmission comprehensive transmission efficiency testing method of the present invention comprises the following steps:

[0030] Step 1. Install the components of the system on the test platform through jigs and fixtures, and adjust the state of each component to the state of the real vehicle to prepare for the test.

[0031] The power output device is connected to the input end of the automatic transmission through the first torque speed sensor, and the power output device simulates an automobile engine as a power source. The power output device is preferably a variable frequency motor, which adopts a special variable frequency induction motor and an AC speed regulation method of a frequency converter, which can adap...

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Abstract

The invention discloses a test method for the comprehensive transmission efficiency of an automotive automatic transmission. The test method includes the following steps that (1) the automatic transmission is installed on an experiment platform, a power output device, a first torque and rotation speed sensor, the automatic transmission, a second torque and rotation speed sensor and a load are sequentially connected, and the automatic transmission is engaged at an advancing gear; (2) a data collecting and control system controls the power output device to operate and output the torque, and collects the rotation speed and torque data; (3) the common driving conditions of an automobile are simulated, and the data of the first rotation speed, the first torque, the second rotation speed and the second torque are obtained through measurement; (4) the comprehensive transmission efficiency of the automotive automatic transmission is worked out according to a formula. By means of the test method, the more actual and accurate transmission efficiency of the automotive automatic transmission is obtained, and a basis is provided for evaluation of the performance of the automatic transmission.

Description

technical field [0001] The invention belongs to the field of automobile testing, in particular to a method for testing the comprehensive transmission efficiency of automatic transmissions of automobiles. Background technique [0002] There are several kinds of automobile automatic transmissions on the market at present. They have the same function but have very different structures. Each automatic transmission has obvious advantages and disadvantages. With the maturity of automatic transmission manufacturing technology, the manufacturing costs of various automatic transmissions are decreasing, and the price gap is also narrowing, which creates the problem of how to choose an automatic transmission. With the aggravation of environmental pollution and the reduction of oil resources, the world is paying more and more attention to the fuel economy of automobiles. As a key component of the transmission system, the transmission efficiency has a great impact on the fuel economy of ...

Claims

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Application Information

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IPC IPC(8): G01M13/02
Inventor 刘学良卢延辉张友坤刘明树鞠彤晖
Owner JILIN UNIV
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