Proportional value adjustable high pressure common rail proportional electromagnetic valve

Abstract

The invention relates to a proportional value adjustable high pressure common rail proportional electromagnetic valve. The proportional value adjustable high pressure common rail proportional electromagnetic valve comprises a valve seat and a valve casing; a coil and an armature are arranged in the valve casing; a valve core is arranged in the valve seat; a piston is arranged in the valve core; an ejector rod is arranged in a coil chamber; one end of the ejector rod is in interference fit with the armature; the other end of the ejector rod penetrates a hole to be in contact with the bottom surface of the piston, wherein the hole is formed at the tail end of the valve core; the circumferential direction of the valve seat is provided with a first inlet hole; a second inlet hole is formed in the circumferential direction of the valve core corresponding to the first inlet hole; the circumferential direction of the piston is provided with an annular groove; the circumferential direction of the annular groove is provided with a flow hole which is communicated with an inner chamber of the piston to enable the second inlet hole which is formed in the valve core to be blocked through the circumferential direction outside the annular groove of the piston. The proportional value adjustable high pressure common rail proportional electromagnetic valve is characterized in that one end of the valve seat, which is far away from the valve casing, is in in interference fit with a spring seat; the center of the spring seat is provided with a screw hole; an adjustment screw is arranged in the screw hole; a spring is arranged in the piston; one end of the spring abuts against the inner bottom of the piston and the other end of the spring abuts against the spring seat; the inner end of the adjustment screw extends into the spring. The proportional value adjustable high pressure common rail proportional electromagnetic valve can be applied to different specifications of oil pumps and is suitable for a high pressure common rail system of a diesel engine.

Description

technical field [0001] The invention relates to a solenoid valve. Specifically, it is a high-pressure common-rail proportional solenoid valve with an adjustable proportional value in the high-pressure common-rail system of a diesel engine. Background technique [0002] At present, the high-pressure common-rail proportional solenoid valve used in the high-pressure common-rail system of a diesel engine includes a valve seat and a valve housing. The valve seat is connected to one end of the valve housing, and the valve seat is closely matched with the valve housing, and a coil is arranged in the valve housing. The armature is closely matched with the ejector rod and is installed in the coil cavity. The valve seat is hollow, and a valve core is arranged therein, and the valve core closely fits with the inner wall of the valve seat. There is a piston in the spool and there is a sliding fit between the two. There is a push rod in the coil cavity, and one end of the push rod pa...

AI Technical Summary

Problems solved by technology

Since there is only one part of the spring between the inner bottom of the piston and the spring seat, the effective number of turns of the spring cannot be changed, so the stiffness of the spring cannot be changed, and the proportional value cannot be changed

One type of solenoid valve cannot be compatible with various types of oil. Therefore, the flow rate ratio must be individually designed to match the requirements of various oil pumps with different specifications. That is, the valve and the pump are not compatible. Operators and valve producers are subject to greater restrictions

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