Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gas injectors with thermally protected elastomer sealing elements

A gas injector and sealing element technology, which is applied to engine components, fuel injection devices, special fuel injection devices, etc., can solve the problems of high temperature stability and easy wear, and achieve the effect of simplified design and low thermal conductivity

Active Publication Date: 2020-03-20
ROBERT BOSCH GMBH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Elastomers have hitherto not been used in direct injection gas injectors due to their limited temperature stability and high wear resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gas injectors with thermally protected elastomer sealing elements
  • Gas injectors with thermally protected elastomer sealing elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Refer to the attached figure 1 and 2 A gas injector 1 for injecting gaseous fuel into a combustion chamber 10 of an internal combustion engine will be described in detail.

[0023] as available from figure 1 Gas injector 1 is an outwardly opening injector as seen in figure 2 marked with arrow A. The gas injector 1 comprises a valve closing element 2 , which in the present exemplary embodiment is a valve needle. The valve closing element 2 releases the passage opening 3 and closes it. In this case, the valve closing element 2 is actuated by means of an actuator not shown, for example an electromagnetic actuator or a piezoelectric actuator.

[0024] The gas injector 1 also comprises a first elastomer-free sealing seat 4 and a second sealing seat 5 comprising at least one elastomeric sealing element 6 . The first sealing seat 4 without elastic body is, for example, a metal sealing seat or a ceramic sealing seat. Combinations of metal and ceramic seal seats are also...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a gas injector for directly injecting a gaseous fuel into a combustion chamber of an internal combustion engine, comprising a valve closure member (2) for releasing and closing a passage hole (3), a first sealing seat (4), and a second sealing seat (5), wherein the first sealing seat (4)is an elastomer-free sealing seat, in particular a metallic or ceramic sealing seat; the second sealing seat (5) is a sealing seat with at least one elastomeric sealing element (6); and the first sealing seat (4) in the axial direction (XX) of the gas injector is closer to the combustion chamber (10) than the second sealing seat (5), and a first thermal insulation element (7) is arranged on the second sealing seat (5).

Description

technical field [0001] The invention relates to a direct-injection gas injector with a thermally protected elastomer sealing element for injecting gaseous fuel directly into the combustion chamber of an internal combustion engine. 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. The problem with gas injectors of this type is tightness, especially with direct-injection gas injectors that inject directly into the combustion chamber. A suitable sealing material here is, for example, an elastomer. Due to its limited temperature stability and high wear resistance, elastomers have hitherto not been used in direct-injection gas injectors. The elastomer has good sealing properties against gaseous media and also has outstanding cushioning properties during the closing process. It is therefore desirable to have a direct injection gas injector that can also use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/16F16K1/34
CPCF02M61/167F02M2200/16F16K1/34F02M21/0269Y02T10/30
Inventor S·克里斯勒O·奥尔哈费尔F·莫泽F·耶格勒M·德赖茨勒R·哈马达
Owner ROBERT BOSCH GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com