Fluid-Injection Device For Internal Combustion Engines

Patent metadata

Field	Value
Publication number	US-2018306152-A1
Application number	US-201615766980-A
Country	US
Kind code	A1
Filing date	Oct 5, 2016
Priority date	Oct 9, 2015
Publication date	Oct 25, 2018
Grant date	—

Abstract

The present disclosure relates to internal combustion engines. Various embodiments of the teaching thereof may include a fluid injection device for internal combustion engines, for example: a valve body with a valve needle; a spring element compressed in a radial direction between the valve body and the valve needle; the spring element supporting the valve needle on the valve body; and the spring element guiding the valve needle to at least substantially prevent tilting of the valve needle relative to the longitudinal axis during operation of the fluid injection device.

First claim

What is claimed is:

1 . A fluid injection device for internal combustion engines, the device comprising:
a valve body with a valve needle arranged therein so as to be displaceable along a longitudinal axis of the valve body; wherein the valve needle interacts with a valve seat to open up or close off a fluid outlet; a spring element compressed in a radial direction between the valve body and the valve needle; the spring element supporting the valve needle on the valve body; the spring element guiding the valve needle to at least substantially prevent tilting of the valve needle relative to the longitudinal axis during operation of the fluid injection device.

2 . The fluid injection device as claimed in claim 1 , wherein the spring element is compressed in a radial direction between the valve needle and a side wall f the valve body and brdiges a radial gap between the valve needle and the side wall.

3 . The fluid injection device as claimed in claim 1 , wherein the valve needle is both centered with respect to the longitudinal axis and axially guided by the spring element.

4 . The fluid injection device as claimed in claim 1 , wherein the spring element is preloaded in a radial direction.

5 . The fluid injection device as claimed in claim 2 , wherein at opposite sides of the gap, the spring element exerts oppositely directed radial forces on the valve needle and on the valve body.

6 . The fluid injection device as claimed in claim 1 , wherein the spring element comprises a circular helical spring with a closed, curved central line about which the windings of the helical spring are wound; and
the valve needle is supported by the spring element on the valve body by virtue of the spring element being supported with its inner circumference on the valve needle and with its outer circumference on the valve body.

7 . The fluid injection device as claimed in claim 1 , wherein the spring element comprises a spider-type spring and has an inner circumference supported on the valve needle, and a number of spring legs supported on the valve body.

8 . The fluid injection device as claimed in claim 1 , further comprising multiplicity of spring elements guiding the valve needls;
wherein the multiplicity of spring elements are arranged in a radial direction between the valve body and the valve needle supporting the valve needle on the valve body; at least two of the spring elements comprise helical springs and are arranged, spaced apart from one another along the circumference of the valve needle between the valve needle and the valve body.

9 . The fluid injection device as claimed in claim 1 , further comprising a multiplicity of spring elements guiding the valve needle;
wherein the spring elements are arranged in a radial direction between the valve body and the valve needle and to support the valve needle on the valve body; wherein at least a first spring element is arranged on a section of the valve needle facing toward the fluid outlet; and at least a second spring element is arranged on a section of the valve needle remote from the fluid outlet.

10 . The fluid injection device as claimed in claim 1 , wherein the spring element si arranged on a central section of the valve needle between a section of the valve needle facing toward the fluid outlet and a section of the valve needle remote from the fluid outlet.

11 . The fluid injection device as claimed in claim 1 , wherein the spring element is welded to the valve needle and/or to an inner surface of the valve body.

12 . The fluid injection device as claimed in claim 1 , wherein the spring element comprises a corrosion-resistant spring steel.

Assignees

• Continental Automotive Gmbh

Inventors

• Jovovic Dejan
• Lyubar Anatoliy

Classifications

• F02M2200/26

  Fuel-injection apparatus with elastically deformable elements other than coil springs · CPC title

• F02M61/12 Primary

  characterised by the provision of guiding or centring means for valve bodies · CPC title

• F02M63/0071 Primary

  characterised by guiding or centering means in valves including the absence of any guiding means, e.g. "flying arrangements" · CPC title

• F02M63/0022

  the armature and the valve being allowed to move relatively to each other · CPC title

• F02M61/20

  Closing valves mechanically, e.g. arrangements of springs or weights {or permanent magnets; Damping of valve lift} · CPC title