Transfer case torque control method for eliminating temperature influence

Abstract

The invention discloses a transfer case torque control method for eliminating temperature influence. The method comprises the steps that a target torque is set, the target torque is substituted into apreset correlation function F1, and a friction plate surface temperature prediction value, a lubricating oil temperature prediction value and an electromagnetic coil temperature prediction value arecalculated; the electromagnetic coil temperature prediction value is substituted into a preset correlation function F2, and an electromagnetic coil power-on current prediction value is calculated; thetotal torque of a transfer case is obtained according to the electromagnetic coil power-on current prediction value, and a correlation function F3 of a friction coefficient and a friction plate surface temperature is set according to the target torque, the total torque of the transfer case and the friction plate surface temperature prediction value; and a correlation function F4 of an output torque and the electromagnetic coil power-on current is obtained according to the correlation function F1, the correlation function F2 and the correlation function F3. According to the method, current collection replaces friction plate surface temperature collection, the data acquisition difficulty is reduced, the data acquisition efficiency and precision are improved, the adjustment efficiency of thetransfer case is improved, and the work controllability of the transfer case is improved.

Description

technical field [0001] The invention relates to the technical field of clutches, in particular to a transfer torque control method for eliminating temperature influence. Background technique [0002] Four-wheel drive vehicles have better off-road performance and ability to get out of trouble, which is the most direct reason why ordinary consumers are more and more inclined to choose four-wheel drive vehicles. As a key component for a four-wheel drive vehicle to achieve a reasonable distribution of power, the transfer case is the core content. [0003] Due to the large amount of heat generated by the friction plate and the counter steel plate during the sliding friction process, the current research mainly focuses on the related effects of the temperature increase of the lubricating oil. Due to the more complex structure of the transfer case, the mechanism of the influence of the temperature of the transfer case friction plate, electromagnetic coil and lubricating oil on the...

AI Technical Summary

Problems solved by technology

However, since the installation of the thermocouple does not directly contact the surface of the friction plate, and the temperature response of the thermocouple is slow (about 1s), there is a large error and lag between the surface temperature of the friction plate measured by the traditional test method and the actual temperature.

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