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Valve for metering fluid, containing a filter device

A filter, fluid technology applied to a valve that measures fluid, placing and forcing the fluid to flow through the filter surfaces of a strainer and a fine filter in sequence. It can solve problems such as sealing problems and filter structure damage, and achieve the effect of preventing sealing problems and simple manufacturing technology.

Active Publication Date: 2015-12-23
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In such fuel injection valves or fuel injection valves it has been found that relatively large individual particles mainly originating from the fuel system or fuel system manufacturing and assembly process and accumulating in the filter arrangement cause damage to the filter structure, for example cutting open Fine-pored filter cloth, so that during further operation, dirt in the fuel can enter the valve unimpeded and cause leak-tightness problems and functional changes there

Method used

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  • Valve for metering fluid, containing a filter device
  • Valve for metering fluid, containing a filter device
  • Valve for metering fluid, containing a filter device

Examples

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Embodiment Construction

[0020] For example in internal combustion engines, in figure 1 The valve for metering fluid shown in longitudinal section in the figure is used as an injection valve for injecting fuel oil or fuel into the intake manifold or combustion chamber of an internal combustion engine or as a metering valve for aqueous urea solution into the exhaust gas tract of an internal combustion engine valve. The valve can also be used in heating installations operating with hot oil or gas and in gas engines.

[0021] exist figure 1 The valve for metering fluids shown in longitudinal section has a tubular valve housing 11 into which a connecting sleeve 12 with a fluid inlet 13 is inserted at one end and in which A hollow valve seat carrier 14 is loaded into the other side end of the valve. The connecting sleeve 12 and the valve seat carrier 14 are integrally connected to the valve housing 11 . The material fit is produced respectively by welding, as in this figure 1 as shown by weld 15 or 16...

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Abstract

The invention relates to a valve for metering fluid, having a flow channel (35), which leads from a fluid inlet (13) to a metering opening (17), for the fluid and having a filter device (40), which is arranged in the flow channel (35) and through which the fluid flows. The filter device (40) has a coarse filter (41) and a fine filter (42), which is arranged downstream of the coarse filter (41) in the flow direction of the fluid, in order to increase the robustness of the filter device (40) against damage from larger particles substantially resulting from manufacturing and assembly processes of the fluid system in which the valve is used.

Description

Background technique [0001] The invention relates to a valve for metering fluids according to the preamble of claim 1 , in which the superordinate concept fluid of the flowing or flowing medium is used in terms of fluid mechanics for gases and liquids. [0002] A known fuel injection valve or fuel injection valve (DE 10 2005 061 424 A1) has a connecting sleeve with an inflow channel for the fuel or fuel oil, the connecting sleeve extending through the hollow magnetic core of the electromagnet and through the The hollow valve needle of the closing head controlling the metering opening extends in the flow channel for the fuel. In order to be able to filter out foreign particles in the fuel which, due to their size, could cause clogging or damage in the injection valve, a filter arrangement is used in the inflow channel of the connecting sleeve. The filter device has a filter pot with a fluid-impermeable pot bottom and a filter structure, such as a filter cloth, a grid or a siev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/16F02M51/06B01D29/58F02M37/34F02M37/48
CPCF02M51/0671F02M61/165F02M2200/27F02M37/48F02M37/34B01D46/62B01D29/56B01D35/30B01D46/0002F02M21/0227F02M63/007
Inventor J·珀尔曼M·舍费尔R·伊特林格
Owner ROBERT BOSCH GMBH
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