An amt shift control method and system for friction coefficient following compensation

Abstract

The invention discloses an AMT shift control method and system with friction coefficient follow-up compensation, which comprises a synchronizer friction coefficient compensation strategy, a vehicle speed signal, an engine speed signal, a throttle valve opening signal, a shift drive device, and a shift actuator. , synchronizer, transmission transmission mechanism, force sensor, temperature sensor, TCU, TCU controls shifting according to vehicle speed signal, engine speed signal, throttle opening signal, shift force signal and synchronizer temperature signal; According to the synchronizer friction coefficient compensation strategy, the TCU corrects the shift force and performs friction coefficient follow-up compensation, thereby shortening the shift interruption time and improving the shift quality. The AMT shift control method and system with friction coefficient follow-up compensation of the present invention is suitable for the field of automobile technology, especially when the all-electric automatic transmission is applied in the automobile transmission system, it will obtain better system integration control effect and shorten the shift interruption. Time can greatly improve the shifting quality of the car.

Description

technical field [0001] The present invention relates to the technical field of vehicle control, and more specifically, relates to an AMT shift control method and system with friction coefficient following compensation. Background technique [0002] Sustained and rapid economic development has made problems such as energy shortage and environmental pollution increasingly prominent. Accelerating the cultivation and development of efficient new automotive technologies is an important strategic measure for the automotive industry. High-efficiency operation of automobile power plants is one of the main solutions to save energy and reduce emissions. An AMT shift control method and system with friction coefficient follow compensation is to consider the influence of temperature changes on the friction coefficient of the synchronizer, and to formulate a more reasonable The shift control strategy reduces the shift interruption time and improves the shift quality. [0003] With the de...

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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the purpose of inventing an AMT shift control method and system with friction coefficient following compensation is to consider that the change of the synchronizer temperature during the shift process will affect the change of the friction coefficient. If the shift force If the friction coefficient remains unchanged, the friction coefficient decreases, which will cause the problem that the shift interruption time is too long. The present invention collects the axial force signal of the shift drive device and the temperature signal of the synchronizer, and feeds it back to the TCU. Coefficient compensation strategy, real-time correction of the axial force of the shifting drive device, reducing the time of the synchronization process and improving the quality of shifting

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