Electronic control oil sprayer for injection valve

Abstract

The invention relates to an electronic control oil sprayer for a diesel engine injection valve. An oil sprayer body oil hole is arranged in an oil sprayer body and communicated with an oil inlet port positioned on the oil sprayer body, a bushing ring and a guiding valve seat are arranged in the oil sprayer body, the guiding valve seat is located below the bushing ring and provided with a guiding valve seat oil hole, and a throttling orifice plate is arranged below the guiding valve seat and provided with a control chamber, an oil inlet throttling orifice, a throttling orifice plate oil inlet hole, a connecting oil hole, an oil returning throttling orifice and a throttling orifice plate oil discharging hole. A control piston sleeve is arranged below the throttling orifice plate and provided with a control piston sleeve oil hole, the lower end face of a control flat valve is a plane, and the upper end face of the throttling orifice plate is provided with a pressure relief ring groove, an outer ring groove and a flow guiding groove. The outer ring groove is sleeved outside the pressure relief ring groove, and the pressure relief ring groove is selectively communicated with the oil returning throttling orifice. The electronic control oil sprayer reduces processing difficulty and improves tightness and production rate.

Description

technical field [0001] The invention relates to an electronically controlled fuel injector for a diesel engine, in particular to an electronically controlled fuel injector for an injection valve. Background technique [0002] Compared with the traditional mechanical fuel system, the electronically controlled high-pressure common rail fuel injection system has significant advantages such as reducing engine noise, reducing emissions, improving economy, and high reliability, so it has been widely used abroad. In China, due to the continuous improvement of emission regulations, the high-pressure common rail system has become an inevitable choice. [0003] In the high-pressure common rail system, the electronically controlled fuel injector is the most critical and complex part. It controls the needle valve body through the opening and closing of the solenoid valve according to the signal sent by the ECU, and injects the high-pressure fuel in the common rail pipe. into the combus...

AI Technical Summary

Problems solved by technology

[0004] In electronically controlled fuel injectors, the seal between the pilot valve seat and the throttle orifice is very important, especially the seal between the valve core and the throttle hole in the throttle orifice. , the machining of the throttle cone is very difficult, and it is difficult to process

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