The invention provides a hydraulic transmission system controlled by an electro-hydraulic proportional valve. In the operation process of the transmission system, oil in an oil pan passes through a coarse oil filter and then enters an inlet of an oil supply pump; after being pressurized through operation of the oil supply pump, the oil is filtered by the fine filter; when the pressure difference before and after the fine filter is blocked reaches a preset value, the pressure switch transmits a corresponding alarm signal to a transmission control unit (TCU) to remind checking and replacement of the fine filter, and a part of oil passing through the fine filter enters an electro-hydraulic proportional valve I and/or an electro-hydraulic proportional valve II to supply oil to a valve body. The gearbox controller TCU is used for controlling the oil pressure of the middle oil duct and the oil quantity returned to the oil tank from the uppermost oil duct for the electro-hydraulic proportional valve I and/or the electro-hydraulic proportional valve II; and the other part of the oil passing through the fine filter enters the torque converter after being subjected to pressure regulation through the safety valve and then flows back to an oil pan of the gearbox. According to the invention, the gearbox controller is combined with the functions of gear, reversing and micro-motion, so that the process is smoother.
本发明提供一种电液比例阀控制的液压传动系统,传动系统运行过程为油底壳中油液经过粗滤油器后进入供油泵的进口;经过供油泵的运转加压后到精滤清器过滤;当精滤清器有堵塞前后压力差达到预定值后压力开关会传递给变速箱控制器TCU相应的报警信号,提醒检查并更换精滤清器,经过精滤清器的油液一部分进入电液比例阀Ⅰ和/或电液比例阀Ⅱ给阀体供油,经过变速箱控制器TCU对电液比例阀Ⅰ和/或电液比例阀Ⅱ来控制中间油道的油压以及由最上方油道返回油箱的油量;经过精滤清器的油液另外一部分再次经过安全阀调压后进入变矩器中,再回流到变速箱油底壳中。本发明通过变速箱控制器结合挡位、换向以及微动的功能实现过程中更加的平顺。
Hydraulic transmission system controlled by electro-hydraulic proportional valve
一种电液比例阀控制的液压传动系统
2022-03-25
Patent
Elektronische Ressource
Chinesisch
IPC: | F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
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