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fuel injector with control valve

A fuel injector and fuel injection technology, applied in fuel injection devices, special fuel injection devices, charging systems, etc., can solve the problem that the operating temperature of the fuel injection valve is no longer stable, and achieve the effect of optimizing the closing function

Active Publication Date: 2020-12-04
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the function of the entire fuel injection valve is no longer robust above the operating temperature

Method used

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  • fuel injector with control valve
  • fuel injector with control valve
  • fuel injector with control valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] figure 1 A fuel injector 100 known from the prior art is shown schematically. Fuel is injected into the combustion chamber of the internal combustion engine by means of the fuel injector 100 . The fuel injector 100 comprises a holding body 10 and a control valve 1 having a solenoid assembly 2 and a magnetic core 3 arranged therein. An injection valve element 11 is actuatable via the control valve 1 and is movably received in the holding body 10 .

[0035] Injection valve element 11 - usually needle-shaped - at the combustion chamber-side end of fuel injector 100 releases or closes injection opening 13 formed on nozzle body 12 into the combustion chamber of the internal combustion engine, so that the fuel Can be injected into the combustion chamber when required. The nozzle body 12 is screwed media-tight to the holding body 10 via a union nut 14 .

[0036] The control valve 1 comprises a valve part 4 which is inserted into a holding body 10 and has a control chamber ...

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PUM

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Abstract

The invention relates to a fuel injector (100) for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector (100) includes a control valve (1) and an injection valve element (11). This injection valve element (11) delimits a control chamber (15) and is guided longitudinally movably in the fuel injector (11). The injection valve element (11) opens and closes at least one injection opening (13) into the combustion chamber by its movement. The control valve (1) controls the pressure in the control chamber (15). The control valve (1) includes an electromagnetic assembly (2), an armature (5), a valve member (4) and a valve seat (7) constructed on the valve member (4). The armature (5) includes an armature plate (50), which can be actuated by the electromagnetic assembly (2). The armature (5) cooperates at least indirectly with the valve seat (7) to release the pressure in the control chamber (15). The crown ring (20) is clamped between the valve member (4) and the solenoid assembly (2).

Description

technical field [0001] The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, the fuel injector having a control valve. Background technique [0002] Various fuel injectors with control valves are known from the prior art, for example from laid-open document DE 196 50 865 A1. [0003] A known fuel injector for injecting fuel into a combustion chamber of an internal combustion engine comprises a control valve and an injection valve element. The injection valve element delimits the control chamber and is guided longitudinally movable in the fuel injector. Through its movement, the injection valve element opens and closes at least one injection opening into the combustion chamber. The control valve controls the pressure in a control chamber and includes a solenoid assembly, an armature, a valve part and a valve seat formed on the valve part. An armature plate arranged on the armature can be actuated by the sole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M47/02F02M63/00F02M61/16F02M61/12F02M51/00
CPCF02M63/0071F02M47/027F02M51/005F02M61/12F02M61/161F02M2200/9069F02M63/0073
Inventor L·奥勒姆斯D·武斯特H·克劳斯O·蒂克尔C·法尔廷M·瓦尔登迈尔T·尼埃里克罗F·菲舍尔
Owner ROBERT BOSCH GMBH