Experimental verification and comparison of the rubber V- belt continuously variable transmission models

Scientific Conference on Automotive Vehicles and Combustion Engines 2016

Grzegozek, W.^1 ; Dobaj, K.^1 ; Kot, A.^1

Institute of Automobiles and Internal Combustion Engines, Cracow University of Technology, Al. Jana Pawla II 37, Krakow

31-864, Poland^1

关键词: Accurate estimation;    Contact regions;    Continuously variable transmission;    Driving wheels;    Experimental verification;    Forces and torques;    Rotational speed;    Surface curvatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/148/1/012005/pdf
DOI  :  10.1088/1757-899X/148/1/012005

来源: IOP

【 摘 要 】

The paper includes the analysis of the rubber V-belt cooperation with the CVT transmission pulleys. The analysis of the forces and torques acting in the CVT transmission was conducted basing on calculated characteristics of the centrifugal regulator and the torque regulator. The accurate estimation of the regulator surface curvature allowed for calculation of the relation between the driving wheel axial force, the engine rotational speed and the gear ratio of the CVT transmission. Simplified analytical models of the rubber V-belt- pulley cooperation are based on three basic approaches. The Dittrich model assumes two contact regions on the driven and driving wheel. The Kim-Kim model considers, in addition to the previous model, also the radial friction. The radial friction results in the lack of the developed friction area on the driving pulley. The third approach, formulated in the Cammalleri model, assumes variable sliding angle along the wrap arch and describes it as a result the belt longitudinal and cross flexibility. Theoretical torque on the driven and driving wheel was calculated on the basis of the known regulators characteristics. The calculated torque was compared to the measured loading torque. The best accordance, referring to the centrifugal regulator range of work, was obtained for the Kim-Kim model.