Metering valve for controlling a gaseous medium

A technology for gaseous media and metering valves, which is applied in the direction of lift valves, valve details, valve devices, etc., can solve the problems of proportional valve sealing performance, angle tolerance, etc., to ensure high sealing performance, improved sealing performance, and small pressure fluctuations Effect

Pending Publication Date: 2020-07-03
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequent opening and closing of proportional valves leads to wear on the valve seat and tilting of the closing element relative to the valve seat, because angular tolerances may occur between the closing element and the valve seat
This in turn has a negative effect on the tightness of the entire proportional valve

Method used

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  • Metering valve for controlling a gaseous medium
  • Metering valve for controlling a gaseous medium
  • Metering valve for controlling a gaseous medium

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] figure 1 An exemplary embodiment of a metering valve 100 according to the invention is shown in longitudinal section. The metering valve 100 has a valve housing 12 in which an inner chamber 26 is formed. An electromagnet 130 comprising a solenoid coil 13 , an inner pole 10 and an outer pole 11 is arranged in the inner chamber 26 . In this case, the inner pole 10 is connected to the valve housing 12 via a spacer bushing element 14 made of a non-magnetic material.

[0017] Furthermore, in the armature chamber 9 contained in the inner chamber 12 there is an armature 6 which is movable back and forth with a rod-shaped element 5 , wherein the rod-shaped element 5 is fixedly connected to the electromagnetic armature 6 and not only the notch 27 of the inner pole 10 and is received and guided in the notch 28 of the valve housing 12 . The armature 6 is designed as a plug-in armature and is received in a recess 22 of the inner pole 10 during its stroke movement.

[0018] The ...

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PUM

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Abstract

The invention relates to a metering valve (100) for controlling a gaseous medium, in particular hydrogen, comprising a valve housing (12), wherein a longitudinally movable, planar closing element (2)is arranged in the valve housing (12) and interacts with a valve seat (4) in order to open and close an opening cross-section from a feed region (7) into a passage opening (21). The valve seat (4) isformed as a circumferential sealing edge (20) on a seat surface (1a), facing the closing element (10), of a nozzle (1) received in the valve housing (12) and fixedly connected thereto. Furthermore, the seat surface (1a) of the nozzle (1) is conical, wherein the closing element (2), in a closed position of the metering valve (100), has a radial protrusion (19) on the circumferential sealing edge (20). The radial protrusion (19) delimits a maximum oblique position of the closing element (2) on the seat surface (1a), wherein the opening angle beta of the conical seat surface (1a) lies in a valuerange of between 172 degrees and 178 degrees.

Description

technical field [0001] The invention relates to a metering valve for controlling a gaseous medium, in particular hydrogen, for use, for example, in a vehicle with a fuel cell drive. Background technique [0002] DE 10 2012 204 565 A1 describes a metering valve designed as a proportional valve for controlling a gaseous medium, in particular hydrogen, the proportional valve comprising a nozzle body, a closing element and an elastic sealing element. At least one throughflow opening is formed in the nozzle body, which can be released or closed by a closing element at the valve seat. Here, the elastic sealing element seals against the valve seat. [0003] During normal operation of the proportional valve, in particular when the metering valve is used in the anode region of the fuel cell system, frequent opening and closing processes occur. In order to optimize the scavenging process in the anode path of the fuel cell or to optimize the operation of the suction injection pump in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/42F16K31/06
CPCF16K1/42F16K31/0655
Inventor H-C·马格尔
Owner ROBERT BOSCH GMBH
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