Test method of automobile transmission system efficiency

Abstract

The invention relates to a test method of automobile transmission system efficiency, which comprises the following steps: a variable frequency and variable speed motor is connected with an automobile transmission system through a revolution speed and torque sensor; two eddy current dynamometers are respectively connected with two half shafts of the automobile transmission system through the revolution speed and torque sensor; a speed variator of the automobile transmission system is positioned at a certain shift; the target rotation speed of the two half shafts under the rotation speed of a certain variable frequency and variable speed motor is determined according to the transmission ratio; the variable frequency and variable speed motor is started, the eddy current dynamometers load the two half shafts respectively so that the two half shafts can reach the target rotation speed, and then the product of the sum of the torque of the two half shafts and the rotation speed of the half shafts is the output power of the automobile transmission system; and the output power and the product of the torque and the rotation speed of the variable frequency and variable speed motor are compared to obtain the transmission efficiency of the automobile transmission system. The test method is simple, and has quick dynamic response and high testing precision.

Description

technical field [0001] The invention relates to a testing technology of a vehicle transmission system, in particular to a method for testing the efficiency of an automobile transmission system. Background technique [0002] The car transmission system is a power transmission device located between the car engine and the driving wheels. Its basic function is to transmit the power output by the engine to the driving wheels. The automotive transmission system mainly includes clutches, transmissions, final reducers, differentials, and axle shafts. This system needs to work with the engine to ensure the driving force and speed necessary for the normal driving of the car under various driving conditions, and Make the car have good power and fuel economy. The transmission efficiency of the automobile transmission system can reflect the comprehensive performance of the automobile transmission system, including its design level and manufacturing level, and can also reflect the power...

AI Technical Summary

Problems solved by technology

It is specifically reflected in the degree of heat generation of the transmission device itself. Excessive heat generation will cause premature deterioration of the lubricating oil, resulting in deterioration of lubrication conditions. In the case of poor heat dissipation conditions, it may also cause partial overheating of transmission components such as clutches, bearings, and gears. Lost some application functions

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