Design of a stepless torque converter for heavy trucks

Abstract

The design of the stepless torque converter for heavy trucks is suggested. The stepless torque converter consists of two series-connected hydromechanical differentials. In the proposed design, automatic stepless control of kinematic and power parameters is carried out in the absence of any control system; simplicity of design options is achieved. The proposed stepless torque converter is able to cover the control range of both passenger cars and heavy trucks. The comparative analysis of designs structures in stepless transmissions produced by the modern automobile industry in different countries shows high degree of the design and technological continuity in relation to the existing production, high degree of standardization and much smaller production cost. The stepless torque converter allows the engine to operate with the equal capacity when changing the external load, which leads to an optimal capacity utilization and, accordingly, to a significant reduction in fuel consumption.