Pressure balanced valve and pressure-retaining device comprising same for oil supply line of engine

Abstract

The invention provides a pressure maintaining device for an engine oil supply pipeline, which comprises a valve body passing through the pipeline, a valve core for regulating the opening level of the pipeline, and an iron core coil assembly for operating the valve core to regulate the opening level of the pipeline. The iron core coil assembly comprises a coil and an iron core. The pressure maintaining device also comprises a balance valve core for regulating the opening level of the pipeline, and an elastic piece for applying an action force on the balance valve core. The valve body is provided with a mounting hole communicated with the pipeline. The balance valve core is arranged in the mounting hole to divide the mounting hole into a first chamber and a second chamber. The balance valve core can slide hermetically relative to the mounting hole. A balance valve core through hole is arranged in the balance valve core to communicate the first chamber with the second chamber. The opening level of the pipeline decreases along with the decreasing of pressure in the first chamber and increases along with the increasing of pressure in the first chamber. During the operation of the engine, the pressure maintaining device ensures the pressure in the engine oil supply pipeline to be kept within a certain range. Thus, the engine can work normally.

Description

technical field [0001] The invention belongs to the field of vehicle oil circuit pressure regulation, in particular to a pressure retainer capable of automatically adjusting the pressure of an engine oil supply circuit. [0002] Background technique [0003] The engine fuel supply system mainly includes a fuel pump, a fuel filter, and an oil pressure regulator connected by pipelines in sequence, wherein the fuel pump is placed in the fuel tank, and a channel of the oil pressure regulator is connected to the fuel tank through a pipeline; The pump, fuel filter, oil pressure regulator, and fuel tank form a circulating system. The pipeline between the fuel pump and the oil pressure regulator is connected to the pipeline connected to the engine. In the engine, the oil pressure regulator is mainly used to adjust the pressure of the oil pump line to the engine. [0004] The sealing effect of the valve of the oil pressure regulator depends on the tight contact between the lower pla...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an engine for the technical defect of the existing engine oil supply pipeline that the engine cannot work normally due to pressure relief. Oil supply line pressure retainer, so that the engine oil supply line can always be kept in a normal oil pressure state to ensure the normal operation of the engine

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