Reverse rotation stator of torque converter in automotive powertrain system

Abstract

Global economy demonstrates a steady elevated demand for heavy mobile equipment for construction and mining enterprises. At the same time wheel loaders, the total annual world output of which is about 160-170 thousand units are in high demand. Many wheel buckets and forklifts are equipped with hydro-mechanical transmissions containing a torque converter and a manual gearbox with hydraulic control. The positive properties of self-regulating torque converters are particularly favorable for equipment operating under stress. The transmission is equipped with a gear due to insufficient transforming properties of the torque converter. In order to improve the dynamic properties of self-propelled machines, designers increase the number of stages in gearboxes. However, multi-stage boxes complicate the hydro-mechanical transmission and its control system. One of the ways to improve the hydro-mechanical gears of mobile machines is to fully utilize the motor and tractor torque converters by using the opposite rotation of the torque converter reactor in the forward and reverse modes of the transmission. The article discusses circuit solutions for a hydro-mechanical transmission with a single-stage torque converter without a multi-stage gearbox, intended for use in transmissions of wheeled transport and loading and other self-propelled machines.