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Injector having a seal and supporting ring

An injector and support ring technology, which is applied to fuel injection valves driven by fluid pressure, engine seals, fuel injection devices, etc., can solve the problems of high deviation, uncertain cross-section, plastic deformation of support rings, etc. Extrusion hazard, easy to handle, improve the effect of extrusion hazard

Active Publication Date: 2011-04-13
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this can result in plastic deformation of the support ring during injector operation due to high-pressure loads, so that the effective cross-section of the opening is uncertain with high deviations

Method used

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  • Injector having a seal and supporting ring
  • Injector having a seal and supporting ring
  • Injector having a seal and supporting ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 1 and 2 each show a detail of an injector 1 for injecting fuel into a combustion chamber of an internal combustion engine, which is used in particular in common-rail fuel injection systems of vehicles.

[0021] A pressure chamber 3 is formed in the interior of the housing 2 of the injector 1 , which is arranged annularly around a valve element 4 designed as an insert. The pressure chamber 3 is formed by two radially spaced annular walls 3A, 3B and a pressure chamber base 8 . In this case, the radially inner ring wall 3A is formed by the valve element 4 , and the radially outer ring wall 3B is formed by the housing 2 . The pressure chamber 3 is fluidically connected to a high-pressure inlet 6 of a high-pressure source by means of a bore 5 .

[0022] Arranged on the circumference of the valve element 4 inside the pressure chamber 3 at its combustion chamber-side end is an annular sealing element 7 which is pressed against the pressure chamber bottom 8 by the high pressur...

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PUM

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Abstract

The invention relates to an injector, in particular for injecting fuel into a combustion chamber of an internal combustion engine, having a valve element which can be displaced longitudinally in a valve housing and an annular pressure chamber which is formed between the valve housing and the valve element and has a sealing element which is arranged therein between the valve housing and the valve element, wherein the sealing element has a sealing ring and an associated supporting ring (30), and the sealing ring has a radially inwardly lying sealing face and a radially outwardly lying sealing face, characterized in that the supporting ring (30) has at least one opening (31) which is spaced apart from a radially inner and a radially outer edge region (30A, 30B) of the supporting ring (30) (figure 5a).

Description

technical field [0001] The invention relates to an injector, in particular for injecting fuel into a combustion chamber of an internal combustion engine. Background technique [0002] Such an injector is known, for example, from DE 102 20 457 A1. The injector disclosed therein has a pressure chamber which is sealed between a high-pressure region and a low-pressure region by means of sealing elements. In this case, the sealing element is accommodated between two annular walls of the pressure chamber and a pressure chamber floor and is formed annularly. The sealing element is designed as a solid, one-piece metal sealing ring, which is received on the inner annular wall by means of a press fit. [0003] Furthermore, DE 10 2004 015 133 A1 discloses an injector which has a sealing element which is designed as a sealing ring with a support ring. The shear-resistant sealing ring is made of a mixture of polytetrafluoroethylene (PTFE) and copper powder, so that extrusion is preven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/16F16J15/16F16J15/12
CPCF02M2547/003F02M2200/16F02M61/166F02M61/167F02M61/168F02M47/027
Inventor M·伯姆L·泽勒
Owner ROBERT BOSCH GMBH