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Proportional valve with improved sealing fit

A proportional valve and sealing element technology, applied in the field of proportional valves, can solve problems such as improving valve seat sealing, and achieve the effects of effective sealing, improved sealing, and large contact area

Active Publication Date: 2013-09-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the valve is not designed as a proportional valve, but as a blown-throttle valve, and there is no statement about improved seat sealing

Method used

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  • Proportional valve with improved sealing fit
  • Proportional valve with improved sealing fit
  • Proportional valve with improved sealing fit

Examples

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Embodiment Construction

[0020] Refer below Figures 1 to 3 A proportional valve 1 for controlling a gaseous medium according to a first embodiment will be described in detail. The proportional valve 1 shown in these figures serves here to control gaseous hydrogen, which is supplied, for example, to a fuel cell in a motor vehicle.

[0021] Such as figure 1 As shown, the proportional valve 1 comprises a valve housing 6 with a magnetic armature 12 , a coil 13 and a rod 11 connected to the magnetic armature 12 . A closing spring 14 is connected to the lever 11 via a spring seat 15 . Reference numeral 16 designates an adjusting pin for adjusting the restoring force of the closing spring 14 . The coil 13 is fastened in a plastic overmolding 17 on the valve housing 6 . An electrical plug connector 18 is arranged laterally on the proportional valve 1 . A closing element 4 is arranged on the end of the rod 11 opposite the closing spring 14 . The closing element 4 closes a central perforation 3 formed in...

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PUM

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Abstract

The invention relates to a proportional valve for controlling gaseous mediums, especially hydrogen. The proportional valve comprises a nozzle body (2) having at least one through hole (3); a sealing element releasing and closing a through hole (3) on a valve seat (21); and an elastic sealing element (5) sealing the valve seat (21). The sealing element (5) has a hollow groove (50) with an inner wall area (51) and pressure for loading gaseous mediums inside the inner wall area (51) when the proportional valve is closed.

Description

technical field [0001] The invention relates to a proportional valve for controlling a gaseous medium, especially hydrogen, and especially for use in motor vehicles with a fuel cell drive. Background technique [0002] In addition to liquid fuels in the motor vehicle sector, gaseous fuels will also become more and more important in the future. Especially in motor vehicles with fuel cell drives, the hydrogen flow must be controlled. The gas flow is no longer controlled discontinuously here, as is the case with liquid fuel injection, but preferably a proportional valve is used which adapts the opening cross section of the valve depending on the desired drive power. [0003] Due to the small molecular size of gaseous hydrogen, high requirements must be met with regard to the tightness of the proportional valve. Even the slightest inclination of the closing element can lead to undesired leaks here. A gas valve for natural gas is known from DE 2005 056 212 A1 in which a specia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/36
CPCF02M21/0266F16K1/34F16K31/0655Y02T10/30
Inventor H·施蒂尔R·申德勒C·威尔J·赫尔F·伊尔格纳T·博佐伊
Owner ROBERT BOSCH GMBH
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