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Fuel injection valve

A technology for fuel injection valves and internal combustion engines, applied in fuel injection devices, special fuel injection devices, charging systems, etc., can solve problems such as enlarging sealing problems, and achieve the effect of reliable sealing and simple cost

Inactive Publication Date: 2006-01-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantage is that, although this known embodiment can allow larger deflection angles, it also increases the sealing problem of the annular gap between the receiving hole and the fuel injection valve, because at larger inclination angles the The sealing is only achieved by the elasticity of the sealing ring, because it has a large cross-sectional area and is elastic and must also seal in the case of strong uneven extrusion

Method used

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Embodiment Construction

[0021] The fuel injection valve 1 according to the invention shown in FIG. 1 with a sealing ring 1 a is designed in the form of a fuel injection valve for a fuel injection system for a mixture-compressing, forced-ignition internal combustion engine. The fuel injector 1 is accommodated in a receiving bore, not shown in detail here, of a cylinder head 1b. The cylinder head 1b is shown as a cutaway plane only in the region of the sealing ring 1a, since this region which is relevant for the invention is described in more detail in the following figures. The fuel injector 1 is particularly suitable for injecting fuel directly into a combustion chamber (not shown) of an internal combustion engine.

[0022] The fuel injection valve 1 is formed by a nozzle body 2 in which a valve needle 3 is guided. The valve needle 3 is operatively connected to a valve closing body 4 which cooperates with a valve seat surface 6 arranged on a valve seat body 5 to form a sealing seat. In this exempla...

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Abstract

The invention relates to a fuel injection valve (1) which can be introduced into a receiving bore (39) of a cylinder head (1b) of an internal combustion engine. Said fuel injection valve has a sealing ring (1a) which is situated peripherally around the fuel injection valve (1) in the receiving bore (39). Said sealing ring (1a) has a partial sphere-shaped contact surface (40) to the fuel injection valve (1) which rests on a corresponding partial sphere-shaped counter-surface (40a) of said fuel injection valve (1).

Description

technical field [0001] The invention relates to a fuel injection valve with a sealing ring, which can be accommodated in a receiving bore in a cylinder head of an internal combustion engine, with a sealing ring arranged in the receiving bore around the fuel injector on the circumference. Background technique [0002] DE 19735665 A1 discloses a fuel injection device which has a compensating element which consists of a support body which has a spherical segment-shaped support surface. A fuel injector is supported via the compensating element in a receiving bore of a cylinder head. In the annular gap between the receiving bore and the fuel injection valve there is a sealing ring, which sits in a groove of the fuel injection valve and seals the annular gap with respect to the combustion chamber. Since the fuel injection valve rests with a support surface on the spherical segment surface formed by the ball, the fuel injection valve can be mounted with an angular offset relative ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M61/14F02M51/06F02M61/16
CPCF02M2200/858F02M61/14F02M61/165F02M51/0671
Inventor 费迪南德·赖特尔京特·霍尔
Owner ROBERT BOSCH GMBH
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