A fuel injector equipped with a fuel filter device

Abstract

A fuel injector equipped with a fuel filter device, the filter device is matched with a reaming fuel inlet pipe joint (11) and a filter gasket (10), and is installed in the pipe joint connection hole (K) of the fuel injector body (9) Inner, reamed oil inlet pipe joint (11) The inner end of the pipe joint oil inlet hole (Y) is reamed to form a stepped hole (T). The diameter of the stepped hole (T) is φ3~5mm, and the depth is 2~10mm. Gasket (10) is folded inwards by metal ring-shaped thin gasket, and a layer of metal filter screen (17) is sandwiched in the middle to block gasket mesopore (D) to form, and the fineness of metal filter screen (17) is 80~160 orders. When the fuel is fed into the injector body (9) through the reaming inlet pipe joint (11) and the filter gasket (10), the impurity particles in the fuel are blocked by the filter mesh (17) of the filter gasket (10), Stay in the stepped hole (T) of the reaming oil inlet pipe joint (11) to ensure that the fuel injector assembly (4) is not stuck, prolong the service life, reduce the loss of shutdown, and ensure that the fuel injector assembly and the complete internal combustion engine work performance.

Description

technical field [0001] The invention relates to an internal combustion engine, in particular to a fuel injector matched with a fuel injection pump. Background technique [0002] The fuel injector is an important part of the fuel system of the internal combustion engine, which allows the fuel to be sprayed into the combustion chamber in the form of mist under a certain pressure, and mixed with air to form a combustible mixture that is conducive to combustion. The structure of the existing fuel injector is composed of a fuel injector body, a fuel injector assembly, a pressure regulating screw, a pressure regulating spring, a mandrel, a pipe connecting bolt, an oil inlet pipe joint and gaskets at various sealing and fastening parts. Install the supporting gasket in the connection hole of the fuel inlet pipe on the side of the injector body, and connect with the fuel injection pump through the fuel pipe. The oil inlet hole in the center of the oil inlet pipe joint is a straigh...

AI Technical Summary

Problems solved by technology

This structure can meet the needs of fuel supply to the internal combustion engine and fuel injection combustion, but because the fuel in the fuel injection pump and fuel pipe is mixed with polluted particulate impurities, after long-term use, it is easy to cause blockage of the fuel injector and increase the angle of the fuel injector. The relative sliding wear of even parts affects the fuel injection efficiency. In severe cases, it will cause the fuel injector to be stuck and cause the performance of the internal combustion engine to fail

Since there is no fuel filter device in the oil inlet pipeline, this unfavorable phenomenon occurs in practical applications, which affects the normal operation of the whole machine and causes losses to users; compensation for each piece returned to the factory for replacement is 100 to 1,000 yuan, resulting in losses to the manufacturer

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