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Electromagnetic valve

A solenoid valve and valve needle technology, applied in the field of solenoid valves, can solve problems such as different opening times, fuel injection quantity scattering, etc.

Inactive Publication Date: 2002-12-11
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, here too, there is a disadvantage that the part moving towards the other part of the armature oscillates excessively after the valve element has seated on its seat. Due to such oscillations, the position of the armature after the pre-injection is uncertain, which leads to subsequent Consequences of different opening times of the solenoid valves when the valves are under the same control during the main injection, which leads to a scatter of the injection quantity

Method used

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Embodiment Construction

[0012] FIG. 1 shows a partial sectional view of an electronically controlled fuel injector 1 , as is known from the above-mentioned prior art. This fuel injection valve is used for this fuel injection equipment. It is equipped with a high-pressure fuel reservoir, and a high-pressure fuel delivery pump continuously supplies high-pressure fuel to the high-pressure fuel reservoir, and from here the fuel under fuel injection pressure passes through various electric circuits. The controlled fuel injection valve feeds the internal combustion engine. The fuel injection valve 1 shown in part and in section has a fuel injection valve housing 4 with a longitudinal bore 5 in which a valve piston 6 is located, which acts at one end without continuing In the shown valve needle, the valve needle again cooperates with the injection opening of the fuel injection valve in a known manner, for example as described in the aforementioned EP0690223. Here, the valve piston 6 is used to actuate the ...

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Abstract

A solenoid valve ( 30 ) is proposed here, the armature ( 28 , 27 ) of which is constructed in multiple parts, with an armature plate ( 28 ), an armature screw ( 27 ), which is guided in a slide ( 34 ). In order to avoid excessive vibrations of the armature plate (28) after the solenoid valve (30) is closed, a vibration damper (50) is arranged on the magnet armature (25). With this device, the instantaneous switching time required by the solenoid valve can be precisely maintained. This solenoid valve (30) is intended for fuel injection equipment with Common Rail.

Description

technical field [0001] The invention relates to a solenoid valve for controlling a fuel injection valve in a fuel injection device. Background technique [0002] A solenoid valve of this type is known from EP 0 690 223 A2. There, the valve is used to control the electronically controlled fuel injection valve. In this case, the valve needle of the fuel injection valve is loaded in the closing direction by the pressure enclosed in the control chamber. Solenoid valves work in a known manner in that when the magnet of the solenoid valve is energized and the valve needle of the injection valve leaves its seat under the action of high pressure acting on it from the other side, in order to start fuel injection, the valve begins to release the valve in the control chamber. pressure. In solenoid valves, the armature is fixedly connected to an armature post, on which the valve element of the solenoid valve rests. [0003] A disadvantage of the known solenoid valves is that during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M47/02F02M59/46F16K31/06F02M47/00F02M51/00F02M51/06F02M61/16F02M63/00
CPCF02M47/027F02M63/0017F02M63/0022F02M2200/304F02M2547/003F16K31/0689F02M47/02F02M59/46
Inventor 霍尔格·拉普安德烈亚斯·克尔纳
Owner ROBERT BOSCH GMBH
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