GEARSHIFT SIMULATION OF AUTOMOBILE TRANSMISSION WITH TORQUE CONVERTER

Abstract

The aim of the work is to evaluate the influence of gear shift parameters on the performance indicators of an automobile transmission with a torque converter (TC). The research objective is to develop a computer dynamic model of an automobile transmission with a three-row planetary gearbox and a TC to assess the transmission quality. The research applies the method of computer simulation using the software package “Universal Mechanism”. The novelty of the work is building a computer dynamic model of an automobile transmission with a three-row planetary gearbox and a torque converter to study the processes of gear shifting. The work results in developing a computer model to study the dynamic processes in a car transmission to assess the influence of gear shift parameters on the performance indicators of a car transmission with a TC. Recommendations are given on choosing gear shift control parameters. The work findings state that increasing the rise time of the friction clutch tup compression force raises the TC efficiency and the synchronization time of the clutch disks, reduces the values of the maximum angular acceleration and the change rate in the angular acceleration of the vehicle wheels (Jerk), increases the work of the friction forces of the clutches (W) when shift up is engaged and reduces W when shift down is engaged regardless of the TC blocking. When upshifting is actuated, one can recommend the minimum value of tup, which provides an acceptable value of Jerk.