Energy-saving system and method for power matching between engine and hydraulic pump

Abstract

The invention discloses an energy-saving system for power matching between an engine and a hydraulic pump. The energy-saving system comprises a pressure sensor, an electronic load controller, an energy-saving controller, an accelerator potentiometer, an optical-electricity encoder, an actuating mechanism, a proportional electromagnetic valve, a pressure relay, an engine oil pump, the engine, a variable pump, a variable mechanism and an oil tank, wherein the oil tank is respectively connected with the engine oil pump and the variable pump, the engine oil pump is respectively connected with the accelerator potentiometer and the engine, and the engine is coaxially connected with the variable pump and is used for driving the variable pump to operate; the optical-electricity encoder is arranged on the engine; the variable pump is synchronously connected with the actuating mechanism, the pressure relay and the variable mechanism, and the proportional electromagnetic valve is arranged on the variable mechanism; the accelerator potentiometer and the proportional electromagnetic valve are respectively and electrically connected with the energy-saving controller; the optical-electricity encoder and the pressure relay are respectively connected with the electronic load controller, and the electronic load controller is connected with the pressure sensor; the variable mechanism is used for controlling the rotating speed of the variable pump.

Description

technical field [0001] The invention relates to a mechanical engineering equipment control device, in particular to a power matching energy-saving system and method for an engine and a hydraulic pump. Background technique [0002] In the field of construction machinery, the working efficiency and fuel-saving performance of excavators driven by hydraulic pumps are closely related to the performance of hydraulic pumps and engines. The ideal working state of the power system should always provide power output according to the load demand, so that the power of the diesel engine can be fully utilized without making it work in an overloaded state, and when the external load is small, it will not cause waste of power. In daily operation, when the power required by the external load is large, the diesel engine runs at full load, and the hydraulic system can completely absorb the power from the diesel engine, but it will not make the diesel engine work in an overloaded state, causing...

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Problems solved by technology

[0003] Although the power system and load matching are controlled according to working conditions, the power mode is generally selected and set manually. Once the power mode does not match the actual working conditions, the engine will work in the low-efficiency area, which greatly improves the excavation. The goal of machine energy saving is difficult to achieve

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