Multi-orifice pencil-style fuel injectors

Abstract

A pencil like apparatus of multi oil spouts, includes an inside oil spray body, an oil inlet junction bolt with filter, a needle valve, an oil injector. The spray body has an O type gasket, the body is an acerose pencil like structure, wherein the spray body matches the acerose shank needle valve, wherein the oil injector is of multi mini spouts on the top of the spray body. The rear part of the spray body is locked in a tight cannula, wherein has pressure adjusting gasket, pressure adjusting spring, fixing bolt, middle bolt on the top of the cannula. Anti coking loops are embedded in the grooves on the outside top of the spray body. Screw the oil inlet in the tight cannular and contact against the needle valve blocker, wherein between there is an O type gasket.

Description

technical field [0001] The present invention relates to fuel injectors, in particular to multi-hole pencil-type fuel injectors. Background technique [0002] The multi-hole fuel injector is a precision device on the engine, and the matching precision is high. The quality of the injector will directly affect the normal use and life of the engine. The structure design of the existing multi-hole injector body: one is to use a shorter needle valve of the fuel injection nozzle, so that the guide part of the needle valve is close to the engine combustion chamber, the guide part of the needle valve is easy to be heated, and the phenomenon of nozzle jamming often occurs; The assembly has a large number of parts and the sealing surface of the assembly parts, which reduces the sealing performance of the assembly, and adopts a higher opening pressure, which increases the impact force of the needle valve on the seat surface of the fuel injector, resulting in increased failures and poor ...

AI Technical Summary

Problems solved by technology

The structure design of the existing multi-hole injector body: one is to use a shorter needle valve of the fuel injection nozzle, so that the guide part of the needle valve is close to the engine combustion chamber, the guide part of the needle valve is easy to be heated, and the phenomenon of nozzle jamming often occurs; The assembly has a large number of parts and the sealing surface of the assembled parts, which reduces the sealing performance of the assembly, and adopts a higher opening pressure, which increases the impact force of the needle valve on the seat surface of the fuel injector, resulting in increased failures and poor reliability. The second is that the number of nozzle holes is small and the hole diameter is large, so the atomization of fuel is not sufficient, which is not conducive to combustion, increases fuel consumption, increases CO and HC emissions, and is difficult to meet environmental protection requirements

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