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Fuel gas ejector with improved opening function

A technology of gas injectors and elastomers, which is applied in the direction of combustion engines, machines/engines, internal combustion piston engines, etc. It can solve the problems of gas injectors being difficult to open and can no longer keep the opening time, and achieve the effect of improving the opening performance

Inactive Publication Date: 2017-01-04
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In gas injectors, especially at low temperatures, another problem is the presence, for example, of oil or oil-containing liquid media in the area of ​​the valve seat
Such oily liquid media can accumulate in the area of ​​the valve seat and additionally make it difficult to open the gas injector
It is also possible that due to the presence of oil in the seat area the defined opening time is often no longer maintained

Method used

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  • Fuel gas ejector with improved opening function
  • Fuel gas ejector with improved opening function
  • Fuel gas ejector with improved opening function

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Embodiment Construction

[0026] back reference Figures 1 to 5 A gas injector according to a preferred embodiment of the present invention will be described in detail.

[0027] The gas injector 1 of the preferred embodiment is a gas injector for blowing gaseous fuel into a combustion chamber. The gas injector 1 here comprises a valve housing 10 , a solenoid armature 12 , a solenoid coil 13 and a closing spring 14 . An adjustment pin 16 is provided to adjust the return force of the closing spring 14 . Gas is supplied axially (arrow H) and is guided through the filter 11 . Solenoid coil 13 is attached to valve housing 10 by means of an injection molding made of plastic. An electrical plug connection 18 is arranged laterally on the gas injector 1 .

[0028] A closing element 30 with an elastomer body 3 is arranged at one end in the axial direction X-X on the electromagnetic armature 12 . The closing element here closes the through openings 6 which are arranged in the valve carrier 20 . The valve se...

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Abstract

The present invention relates to a fuel gas ejector with improved opening function. The ejector comprises a valve seat, and a valve seat assembly of an elastic body which releases and seals the through opening of the valve seat, wherein the valve seat has an anti-sticking coating.

Description

technical field [0001] The invention relates to a gas injector for blowing in a gaseous medium, which has improved opening behavior. The invention also relates to a method for producing a valve seat for a gas injector. Background technique [0002] Various configurations of gas injectors are known from the prior art. To seal a gas injector of this type, an elastomer can be used which, in the closed state of the gas injector, sits on the valve seat. However, a problem with this type of gas injector is the cold start capability, since the elastomer has only very little elasticity at low temperatures. To solve this problem, an elastomeric sealing element was proposed in DE 10 2013 202 599 A1, which has different thicknesses at the sealing area. A further problem in gas injectors, especially at low temperatures, is the presence of, for example, oil or an oil-containing liquid medium in the region of the valve seat. Here, the oil may come from bearings or other lubricating po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02F16K1/42
CPCF02M21/0266F02M21/0296F16K1/42F16K1/36F16K25/005F16K31/0651F16K31/0655Y02T10/30B82Y40/00F16K1/34
Inventor M·普罗克施J·罗泽H·寺主E·奥克伦特A·克劳斯A·佩茨S·黑斯F·米勒
Owner ROBERT BOSCH GMBH