Two-stage variable pump control system based on single feedback cavity

The utility model provides a two-stage variable pump control system based on a single feedback cavity, which comprises a main oil duct, an oil pan, a variable displacement vane pump and an electromagnetic valve with a safety mode, and the variable displacement vane pump comprises a pump body, a variable spring, a rotor, a variable sliding block and a feedback oil cavity; the electromagnetic valveis provided with a P port, an A port and a T port, the P port is communicated with the main oil channel, the A port is communicated with the feedback oil cavity, and the T port is communicated with the oil pan. Two-stage variable displacement of the single-cavity feedback vane pump can be realized only through combined application of the single-feedback cavity and the electromagnetic valve with the safety mode, so that the structure of the whole control system is greatly simplified, the control is simple, and the response is timely. 本实用新型提供了一种基于单反馈腔的二级变量泵控制系统，包括主油道、油底壳、可变排量叶片泵和具有安全模式的电磁阀，所述可变排量叶片泵包括泵体、变量弹簧、转子、变量滑块和反馈油