Steel strip slip simulation method and device for continuously variable transmissions

Abstract

The invention discloses a steel strip slip simulation method and device for continuously variable transmissions. When the maximum torque which is currently and actually transmitted by a driving wheelis less than actually transmitted torque, relations between the linear velocity of a steel strip and the angular velocity and radius of the driving wheel need to be judged, so that whether the steel strip slips at the driving wheel can be determined; and processes to judge whether the steel strip slips at a driven wheel are similar. When the slip state of the current steel strip is judged, erroneous judgement of the slip states can be reduced by adding the analysis on the relations between the steel strip linear velocity and driving and driven wheels, so that situations of slip rate jump can be decreased, and the quality and efficiency of strategy simulation in control strategy development can be enhanced.

Description

technical field [0001] The invention relates to the technical field of automobile simulation, and more specifically, to a steel belt slip simulation method and device for a continuously variable transmission. Background technique [0002] CVT (Continuously Variable Transmission, continuously variable transmission) is an ideal transmission device for passenger cars with low torque. It can adjust the speed ratio according to the driving requirements of the car at any running time, so that the engine always runs in the target operating area with the best economical fuel consumption. , can effectively improve the fuel consumption of the engine and the emission of harmful substances. [0003] The core part of the CVT components is the steel belt, which is composed of two metal rings and hundreds of metal sheets. The driving wheel and the driven wheel are connected by a steel belt. Both the driving wheel and the driven wheel are composed of a moving cone and a fixed cone. The c...

AI Technical Summary

Problems solved by technology

The calculation of the maximum torque depends on the accurate current value acquisition. However, the output current of the pressure solenoid valve collected by the physical model in the hardware-in-the-loop test environment has interference and clutter. Therefore, the calculated maximum torque will fluctuate. When according to When the traditional method calculates the slip, there will be an instantaneous slip, which will cause the slip rate to fluctuate, which is quite different from the actual situation.

This in turn affects the quality and efficiency of strategy simulation in control strategy development

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