Proportional control type continuously variable transmission flow active control system

Abstract

The invention discloses a proportional control type continuously variable transmission flow active control system. A double hydraulic pump comprises a main pump unit and a secondary pump unit, the oil inlet of the main pump unit and the oil inlet of the secondary pump unit are connected with an oil box, the oil outlet of the main pump unit is respectively connected with a main single-way valve and a secondary single-way valve, the other end of the main single-way valve is respectively connected with the oil inlet and the throttling port of an overflow valve, and the oil outlet of the overflow valve is connected with the oil box. The other end of the throttling port is connected with an executing mechanism, the other end of the secondary single-way valve is connected with the oil inlet A of a reversing valve, the oil outlet of the secondary pump unit is connected with the oil inlet A of the reversing valve, the oil outlet O of the reversing valve is connected with the oil box, the external control port B of the reversing port is connected with the front end of the throttling port through a proportional pressure reducing valve, and the proportional pressure reducing valve is in electric connection with an automatic transmission control unit (TCU). The proportional control type continuously variable transmission flow active control system has the advantages that energy loss of a hydraulic system is greatly reduced, and optimal matching of system flow is achieved; work performance of real-time and accurate flow switching is achieved easily; system work efficiency is improved greatly; and double feedback signals are timely and accurate, system flow changes are reflected in real time, and control accuracy is high.

Description

technical field [0001] The invention relates to a proportional control type continuously variable transmission flow active control system, which is mainly used in the hydraulic system of the continuously variable transmission, especially the hydraulic system of the continuously variable transmission with small volume and low cost. Background technique [0002] With the increasingly serious energy crisis and the increasingly severe energy shortage problem, the common theme emerging in the tide of development and change in today's world is energy saving and emission reduction, people-oriented, and the development of the field of automatic transmissions for automobiles should also follow this development trend and trends. Since the 1980s, automotive automatic transmissions have taken high efficiency, energy saving, comfortable operation, safety and reliability as the main pursuit goals; in the 1990s, the automotive industry has paid more and more attention to the research and d...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large energy loss, high power loss, low system working efficiency, low control efficiency and low control precision in the existing hydraulic system, and provide a proportional control type continuously variable transmission flow active control system. The system flow is adjusted in real time by proportional control

Images