Direct-injection gas injector with elastomer seat and sealing edge

A gas injector and sealing seat technology, which is applied in fuel injection devices, machines/engines, mechanical equipment, etc., can solve the problems of high temperature stability and easy wear, and achieve the effect of compact structure

Active Publication Date: 2020-02-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Suitable materials for the sealing seat are, for example, elastomers, but elastomers have hitherto not been used in direct-injection gas injectors due to their limited temperature stability and high wear resistance

Method used

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  • Direct-injection gas injector with elastomer seat and sealing edge
  • Direct-injection gas injector with elastomer seat and sealing edge
  • Direct-injection gas injector with elastomer seat and sealing edge

Examples

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Embodiment Construction

[0024] Refer to the attached Figures 1 to 3 A gas injector 1 according to a first preferred embodiment of the present invention will be described in detail.

[0025] as from figure 1 As can be seen, the gas injector 1 comprises a valve closing element 2 which in this embodiment is a valve needle with a cylindrical body. X-X here indicates the axial direction of the gas injector. The valve closing element 2 here releases or closes the passage opening 10 to the combustion chamber 16 . figure 1 The closed state of the gas injector is shown. The gas injector 1 is here a gas injector that opens outwards, as in figure 1 as indicated by arrow A.

[0026] The gas injector 1 also includes a plurality of sealing seats which are arranged between the valve closing element 2 and the valve body 8 . More precisely, the gas injector 1 comprises a first sealing seat 3 realized in two metal sealing counterparts 31 , 32 . In this case, the first metallic sealing counterpart 31 is arrange...

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PUM

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Abstract

The invention relates to a gas injector for injecting a gaseous fuel directly into a combustion chamber of an internal combustion engine. The gas injector comprises a valve closing element (2) for releasing and closing a passage opening, a first sealing seat (3) with two metallic sealing partners (31, 32), a second sealing seat ( 4) with an elastomer sealing partners and a first sealing edge (11), and a third sealing seat (5) with an elastomer sealing partner and a second sealing edge (12).

Description

technical field [0001] The invention relates to a direct-injection gas injector having an elastomer sealing seat and at least two sealing edges, which seal against the elastomer sealing seat. Background technique [0002] In addition to liquid fuels, gaseous fuels, such as natural gas or hydrogen, have recently been increasingly used in the motor vehicle sector. In direct injection gas injectors, sealing with the gas injector closed presents a series of problems. A suitable material for the seal seat is, for example, an elastomer, but elastomers have hitherto not been used in direct-injection gas injectors due to their limited temperature stability and high wear resistance. In addition to the good sealing properties of the elastomer, its excellent damping properties during the closing process are also advantageous here. Contents of the invention [0003] Compared with the prior art, the inventive direct-injection gas injector for injecting gaseous fuel directly into the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M21/02F02M61/18F02M61/08F16K11/04F16K1/38
CPCF02M21/0248F02M21/026F02M61/08F02M61/18F16K1/38F16K11/04F02M21/0269F02M21/0272F02M21/0275Y02T10/30
Inventor O·奥尔哈费尔R·哈马达F·耶格勒
Owner ROBERT BOSCH GMBH
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