Hydraulic transmission stepless speed-changing system

Abstract

The invention discloses a hydraulic transmission stepless speed-changing system. The hydraulic transmission stepless speed-changing system comprises a main loop composed of a pump and a motor and further comprises an electronic control unit. The main loop is provided with a first branch circuit for oil inlet and corresponding structures and a second branch circuit of oil outlet and corresponding structures. A sliding valve connected with the motor is further connected to the main loop in parallel; the pump is connected with an input shaft, and the motor is connected with an output mechanism; the electronic control unit is connected with a plurality of sensors and further connected with an output servo mechanism; and the output servo mechanism is connected with the motor. The hydraulic transmission stepless speed-changing system has the characteristics of smooth transmission, high lubrication full response speed and relatively-simple system; in addition, the oil leakage phenomenon is not likely to occur, and the system pressure and the transmission ratio are stable; meanwhile, the performance, resistant to hydraulic pressure impact, of a pipeline of the hydraulic transmission stepless speed-changing system is good, and the oil leakage phenomenon can be further reduced; and the motor is sufficiently lubricated, the energy of the friction loss is small, and the transmission efficiency of the system is high.

Description

technical field [0001] The invention relates to a speed change system, in particular to a hydraulic transmission continuously variable speed system. Background technique [0002] A continuously variable transmission system refers to a transmission system that can continuously obtain any transmission ratio within the transmission range. The best match between the transmission system and the engine operating conditions can be obtained through continuously variable transmission. The existing continuously variable transmission system mainly includes mechanical transmission continuously variable electric transmission continuously variable transmission. Among them, the mechanical transmission continuously variable transmission system is relatively common nowadays. It has the characteristics of small slip rate and reliable operation, but the processing and lubrication requirements of the parts are high; at the same time, because the parts are in rigid contact, the system cannot ab...

AI Technical Summary

Problems solved by technology

Among them, the mechanical transmission continuously variable transmission system is relatively common now, which has the characteristics of small slip rate and reliable operation, but the processing and lubrication requirements of the parts are high; at the same time, because the parts are in rigid contact, the system cannot absorb and attenuate vibration , causing the system to not work smoothly

For the continuously variable transmission system of electric transmission, its response speed is slow, and there is also the problem of unstable operation at low speed, and the equipment of electric transmission system is complicated and expensive, and its maintenance also requires corresponding professionals

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