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fuel injector

A technology of fuel injectors and injectors, which is applied in the direction of fuel injection devices, charging systems, machines/engines, etc., can solve problems such as the influence of ignition characteristics, duration and quantity, sequence and mixing ratio, and achieve compact structure, Create easy effects

Active Publication Date: 2021-03-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The duration and amount of the corresponding injections of liquid fuel / gas as well as the sequence and the mixing ratio significantly affect the ignition characteristics and thus the efficiency of the entire injection system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] figure 1 A fuel injector according to the invention is shown comprising an injector housing 1 , which surrounds a nozzle body 2 , a valve body 3 and a holding body 4 . An electromagnetic coil 33 is inserted between the valve body 3 and the holder 4 . Furthermore, the fuel injector has an inner pole 5 and an electromagnetic armature 6 which consists of an armature plate 9 and an armature pin 10 . Here, the valve body 3 , the holding body 4 and the inner pole 5 delimit an armature chamber 22 in which the electromagnetic armature 6 is arranged. The armature pin 10 sinks into the through-opening 13 of the valve body 3 and protrudes there into a pressure chamber 21 , wherein the pressure chamber 21 is formed in the nozzle body 2 and the valve body 3 and is delimited by the valve body 3 . The armature chamber 22 can be filled with liquid fuel via the rail 23 , wherein the liquid fuel can enter the pressure chamber 21 via the feed throttle 49 . In the pressure chamber 21 , ...

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PUM

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Abstract

The invention relates to a fuel injector for injecting both liquid and / or gaseous fuels, having an injector housing (1) comprising a nozzle body (2) and a valve body (3). A reciprocatingly arranged first nozzle needle (7) for opening and closing the injection section (27) is arranged on the injector housing (1). The first nozzle needle ( 7 ) is designed as a hollow needle, in which a second nozzle needle ( 8 ) arranged so as to be movable back and forth is arranged. The second nozzle needle cooperates with an inner nozzle seat (25) formed in the first nozzle needle for opening and closing the at least one spray opening (35). The first nozzle needle (7) and the second nozzle needle (8) delimit an injection chamber (20), which can be filled with fuel via a feed throttle (36). In the up switch position, the second nozzle needle (8) bears against the sealing seat (38) and thus separates the connection between the injection chamber (20) and the feed throttle (36).

Description

technical field [0001] The invention relates to a fuel injector for injecting two liquid and / or gaseous fuels into a combustion chamber of an internal combustion engine. Background technique [0002] A combustion method for an internal combustion engine is known from DE 10 2013 014 329 A1, which uses a dual-fuel fuel injector for delivering different types of fuel into a combustion chamber of the internal combustion engine. Arranged in the dual-fuel fuel injector here is a first nozzle arrangement through which diesel fuel can flow into the combustion chamber and a second nozzle arrangement through which gaseous fuel can be carried into the combustion chamber. [0003] By means of such dual-fuel fuel injectors, especially in the case of diesel / gas engines, the internal combustion engine can be operated both in pure liquid-fuel operation and in combined liquid-fuel / gas operation. Both the duration and the amount as well as the sequence and the mixing ratio of the respective ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M45/08F02M51/06F02M43/04
CPCF02M51/0671F02M51/0664F02M45/086F02M43/04
Inventor M·库尔茨
Owner ROBERT BOSCH GMBH