Electromagnetic variable cam mechanism and small-fluctuation variable-flow oil supply device

Abstract

The invention discloses an electromagnetic variable cam mechanism and a small-fluctuation variable-flow oil supply device. The small-fluctuation variable-flow oil supply device comprises an oil tank and an oil pump, wherein the oil pump is composed of a cylinder body and a piston, an oil inlet of the cylinder body is communicated with the oil tank through an oil inlet valve and a filter, an oil outlet of the cylinder body is communicated with an oil inlet of an electric-control oil injector through an oil outlet valve and a pressure sensor, an oil return port of the electric-control oil injector is connected with an oil return port of the oil tank through an oil return control valve, the lower end of the piston makes contact with a single-action cam or a multi-action cam, and the pressure sensor, the electric-control oil injector, an electromagnetic coil and the oil return control valve are connected with a power source and a controller. According to the small-fluctuation variable-flow oil supply device, the single-action cam or the multi-action cam is selected to be used for changing the oil supply capacity of the oil pump in real time according to the rotating speed working condition and the load working condition of an engine, the amount of returned oil is controlled through the oil return control valve, the amount of returned oil of the oil pump is reduced, and fuel oil supplying efficiency is improved.

Description

technical field [0001] The invention relates to an oil supply device for an engine, in particular to an electromagnetic variable cam mechanism and a small pulsation variable flow oil supply device. Background technique [0002] With the increasingly serious energy shortage and environmental pollution, the requirements for engine fuel supply technology are also getting higher and higher. The fuel supply device of a traditional engine is generally composed of fuel tanks, fuel filters, fuel pumps and oil pipes and other components. When the engine is running, the crankshaft of the engine drives the camshaft of the oil pump to rotate, and the piston of the oil pump reciprocates up and down in the piston chamber of the pump body. Through the reciprocating movement of the oil pump piston, the volume of the sealed cavity inside the pump is increased and reduced, the fuel is sucked out from the fuel tank, the resistance of the fuel filter is overcome, the fuel is pressurized, a...

AI Technical Summary

Problems solved by technology

Although this invention can adjust the oil injection angle of the oil pump cam at will, the oil pump using the camshaft cannot adjust the oil supply capacity of the oil pump according to the working conditions of the engine. Problems of low oil pressure, small flow, large oil supply pressure pulsation, and the sudden opening and closing of the electronically controlled injector at the moment of oil injection cause pressure pulsation and impact on the oil supply system

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