Common rail oil injector of marine diesel engine

Abstract

The invention discloses a common rail oil injector of a marine diesel engine, which comprises a needle valve matching part, wherein a first channel and a first inner cavity for containing a needle valve are arranged in the needle valve matching part, the first channel and the first inner cavity are communicated, a pressure chamber is arranged at the bottom end of the needle valve matching part, and a plurality of spraying holes are formed in the surrounding wall of the pressure chamber; an oil sprayer body internally provided with a second channel, a third channel, a cooling channel and a second inner cavity used for containing the control valve matching part and the driving mechanism, wherein the second channel, the first channel and part of the first inner cavity are communicated to form an oil inlet channel, and the control valve matching part is provided with a fourth channel capable of communicating with the second channel and the second inner cavity; a third channel capable of sequentially being communicated with the second inner cavity and the first inner cavity to form an oil return channel; a mounting cap fixedly arranged at the top end of the second inner cavity, wherein the mounting cap, the first inner cavity and the second inner cavity can define a mounting cavity used for sequentially arranging the needle valve, the control valve matching part and the driving mechanism from bottom to top; and a locking nut arranged on the outer surfaces of the needle valve matching part and the oil sprayer body in a sleeving mode to connect the needle valve matching part and the oil sprayer body into a whole.

Description

technical field [0001] The invention relates to the technical field of electronically controlled fuel injection for diesel engines, in particular to a common rail fuel injector for marine diesel engines. Background technique [0002] Diesel engines are widely used in various fields due to their high thermal efficiency, good economy, high reliability, and wide power range, and have played an important role in the development of modern society. Since the beginning of the new century, the development of diesel engines has become more and more perfect, and in the foreseeable future, diesel engines will still play a leading role in the field of marine power. However, as the emission regulations of various countries in the world are becoming more and more strict on emission requirements, diesel engines are increasingly becoming the object of emission regulations because of their relatively large adverse effects on the environment. Therefore, how to improve the working quality of d...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a common rail fuel injector for marine diesel engines, which is used to solve the problem of large fuel injection volume required by common rail fuel injectors for marine high-power diesel engines in the prior art, poor sealing of control valves, and the need for solenoid valves to drive valves. hard problems

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