The invention relates to an electro-hydraulic control system and a tractor. The electro-hydraulic control system comprises a steering device, a multi-way valve device, a variable displacement piston pump and a steering priority valve, wherein an oil outlet I of the variable displacement piston pump is communicated with an oil inlet of the steering priority valve through a pipeline; and two oil outlets of the steering priority valve are respectively communicated with an oil inlet of the steering device and an oil inlet of the multi-way valve device through pipelines. The electro-hydraulic control system provided by the invention has the beneficial effects that the characteristics of high response speed, high control precision, convenience in operation and the like are achieved, and a hydraulic pipeline is simplified; a constant-speed control function is achieved, and a high-maneuverability mode or a high-economical-efficiency mode can be switched; the working performance and the service life of a wet clutch are improved; and a constant power function can ensure that an engine works in the optimal economical state.
本发明涉及一种电液控制系统及拖拉机,包括转向装置、多路阀装置、变量柱塞泵及转向优先阀,变量柱塞泵的出油口一通过管路与转向优先阀的进油口连通,转向优先阀的两个出油口分别通过管路与转向装置的进油口和多路阀装置的进油口连通。本发明的有益效果是具有响应速度快、控制精度高、操纵方便等特性,简化了液压管路;具备恒速控制功能,且可切换高操纵性或高经济性模式;提高湿式离合器的工作性能和使用寿命;恒功率功能,可以保证发动机在经济性最佳状态下工作。
Electro-hydraulic control system and tractor
一种电液控制系统及拖拉机
2021-10-15
Patent
Electronic Resource
Chinese
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