Injector High Speed ​​Solenoid Valve

Abstract

The invention discloses a high-speed electromagnetic valve for an oil sprayer. The high-speed electromagnetic valve comprises a connecting threaded sleeve, a fastening threaded sleeve, an electromagnetic valve spring sleeve, an electromagnetic valve spring, a pressure adjusting washer, an electromagnetic valve needle assembly, a magnetic core part and a clearance adjusting washer, wherein the electromagnetic valve needle assembly is formed through welding an electromagnetic valve needle and an armature into a whole, and the magnetic core part is formed through injection molding of a magnetic core, a magnetic head, a magnetic isolating pad, a pin, a lead, a linkage nut, an electromagnetic valve nut and the like; the electromagnetic valve needle assembly is inserted into the central hole of a magnetic core part and is paired with the magnetic core part in a clearance fit manner; the clearance adjusting washer is arranged at the upper end of the electromagnetic valve needle assembly, the electromagnetic valve spring sleeve is arranged in the central hole of the magnetic head, the electromagnetic valve spring is arranged in the electromagnetic valve spring sleeve, the lower end of the electromagnetic valve spring is abutted with the clearance adjusting washer, the upper end of the electromagnetic valve spring is positioned by the pressure adjusting washer, and the electromagnetic valve spring sleeve is fastened in the magnetic core part by the fastening threaded sleeve. The oil sprayer high-speed electromagnetic valve is simple in structure and convenient to mount.

Description

technical field [0001] The invention relates to the field of high-pressure injection systems of automobile diesel engines, in particular to a high-speed electromagnetic valve for high-pressure common rail injectors. Background technique [0002] In recent years, with the increasingly stringent requirements of emission regulations and the increasing shortage of petroleum energy, the emission standards for diesel engines and the technical requirements for engines have become more and more stringent. But diesel engine emission control is a difficult point. In order to meet the emission standards, the advanced fuel injection system of diesel engines - high pressure common rail technology has become the focus of attention of the industry. [0003] The high-pressure common rail injection system of diesel engine realizes the separation of pressure build-up and injection process, so that the control process is more flexible, and it can more accurately realize the precise control of...

AI Technical Summary

Problems solved by technology

The existing high-speed solenoid valve adopts the split structure of the armature and the solenoid valve needle. The solenoid valve needle adopts the downward guiding mode, and the axial guiding effect of the solenoid valve needle is weak; the number of coil turns is large, the heat dissipation is large, and the heat radiation intensity is high. The cost is high; the spring force system of the solenoid valve and the solenoid valve assembly are an integral system. When adjusting the spring force of the solenoid valve, the solenoid valve needs to be disassembled as a whole, which cannot quickly and effectively adjust the spring force of the solenoid valve, resulting in a waste of time for parts replacement. The spring force system is set on the stationary parts, and a large spring force of the solenoid valve is required to ensure the sealing performance of the injector when the injector is closed. Large tightening torque will easily lead to deformation of the solenoid valve parts; the stroke adjustment of the solenoid valve armature needs to disassemble the solenoid valve as a whole Parts can only be adjusted, which complicates the replacement of parts and causes a waste of time; if a fault occurs and it is inconvenient to replace, the overall replacement will cause a lot of waste, reduce the assembly pass rate, and increase the production cost of the product

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