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A Torque Control Method of Transfer Case Eliminating the Effect of Temperature

A torque control and transfer case technology, applied in the clutch field, can solve the problems of error lag and slow temperature response characteristics of thermocouples, achieve real-time regulation, eliminate temperature effects, and overcome high measurement costs.

Active Publication Date: 2021-02-05
NANTONG UNIVERSITY
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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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  • A Torque Control Method of Transfer Case Eliminating the Effect of Temperature
  • A Torque Control Method of Transfer Case Eliminating the Effect of Temperature
  • A Torque Control Method of Transfer Case Eliminating the Effect of Temperature

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Embodiment Construction

[0038] refer to figure 1 , a transfer case torque control method that eliminates the influence of temperature proposed by the present invention includes.

[0039] S1. Set the target torque, substitute the target torque into the preset correlation function F1, and calculate the predicted value of the surface temperature of the friction plate, the predicted value of the lubricating oil temperature and the predicted value of the electromagnetic coil temperature.

[0040] Specifically, in this step, the correlation function F1 can be derived based on existing basic theories such as mechanical energy and thermal energy conversion, combined with the working principle of the transfer case. Moreover, in a specific implementation, since the correlation function F1 includes three independent variables, namely the surface temperature of the friction plate, the temperature of the lubricating oil and the temperature of the electromagnetic coil, the correlation function F1 can be set as a m...

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Abstract

The present invention proposes a transfer case torque control method that eliminates the influence of temperature, including: setting the target torque, substituting the target torque into the preset correlation function F1, calculating the predicted value of the surface temperature of the friction plate, the predicted value of the lubricating oil temperature and the predicted temperature of the electromagnetic coil Substituting the predicted value of the battery coil temperature into the preset correlation function F2 to calculate the predicted value of the electromagnetic coil energized current; the total torque of the transfer case is obtained according to the predicted value of the energized current of the electromagnetic coil, and combined with the target torque, the total torque of the transfer case and the friction plate The predicted value of the surface temperature sets the correlation function F3 of the friction coefficient and the surface temperature of the friction plate; the correlation function F4 of the output torque and the energized current of the electromagnetic coil is obtained by combining the correlation function F1, the correlation function F2 and the correlation function F3. The invention replaces the collection of the surface temperature of the friction plate by current collection, reduces the difficulty of data collection, improves the efficiency and accuracy of data collection, is beneficial to improve the adjustment efficiency of the transfer case, and improves the controllability of the transfer case.

Description

technical field [0001] The invention relates to the technical field of clutches, in particular to a method for controlling torque of a transfer case that eliminates the influence of temperature. 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 plates, electromagnetic coils...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D48/06B60K17/344
CPCB60K17/344F16D48/06
Inventor 王钰明陈黎卿李洪亮顾添翼谢莹孙美陈一枭裔馥华孙景景胡蝶
Owner NANTONG UNIVERSITY
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