Device for testing cooling performance of liquid controlled stepless speed changer and its testing method

Abstract

The invention discloses liquid control non-stage transmission cooling performance detecting device and method. The device includes sensing component connected in series, control component contains analog to digital converter ADC0816 and SCM AT89C2051, executing component contains digital to analog converter TCL5620 and solenoid valve, electrical source, and liquid flow rate adjusted by the solenoid valve according to the control signal. The method includes the following steps: respectively setting and collecting sensor output time slice, solenoid valve duty ratio, duty ratio adjusted step size; confirming collecting time according to the object and output value to process data converted into digital signal; comparing the curve gained under the condition that cooler inlet oil temperature is not more than 150 degree centigrade with theoretic one; storing the result and sending to output device. It can automatically verify and detect CVT efficiency, the matching of the wind cooler and hydraulic system.

Description

technical field [0001] The invention relates to a detection device and a detection method, in particular to a detection device and a detection method of the cooling performance of a hydraulically controlled continuously variable transmission. Background technique [0002] Continuously variable transmission (CVT: continuously variable transmission) using hydraulic operation is to control the oil pressure and flow output by each oil circuit by controlling the duty ratio of the solenoid valve in the hydraulic system, thereby realizing effective control of its output speed. Since the main role is the hydraulic system, the selected oil and oil temperature will directly affect the performance of the CVT. Among them, the oil temperature is most affected by the external working conditions, and once it exceeds the allowable limit value, it will cause The whole CVT doesn't work properly. In order to solve this problem, the commonly used way to reduce the oil temperature is to connect...

AI Technical Summary

Problems solved by technology

However, how effective is this CVT with an air cooler? Is the air cooler properly matched to the hydraulic system? It has always been a problem that has plagued the development, verification and testing of CVTs

Although there are also artificial methods, that is, to understand the oil leakage, oil temperature, shift quality, and speed ratio mode of the CVT through visual and hand feeling, but there are also problems that can only be qualitatively verified and cannot be quantitatively verified and tested.

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