Arrangement of a fuel injection valve on a fuel distributor of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10815948-B2
Application number	US-201916544645-A
Country	US
Kind code	B2
Filing date	Aug 19, 2019
Priority date	Aug 20, 2018
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The invention relates to an arrangement for connecting at least one fuel injection valve with a fuel distributor of a fuel injection system of an internal combustion engine, which fuel distributor is detachably fastened to a cylinder head, wherein the at least one fuel injection valve is detachably fastened by means of a fixing element to a mounting element of the fuel distributor. It is provided that a non-cylinder-facing surface of the mounting element of the fuel distributor and a cylinder-facing surface of the fixing element, in the assembled state of the cylinder head and fuel distributor and also the fuel injection valve, are configured as contact surfaces, by means of which, through attachment of the fixing element to the fuel injection valve, it is possible to bring about an axial fixing and a radial orientation of the fuel injection valve in the cylinder head and in the mounting element of the fuel distribution rail.

First claim

The invention claimed is:

1. An arrangement for connecting at least one fuel injection valve with a fuel distributor of a fuel injection system of an internal combustion engine, wherein the fuel distributor is detachably fastened to a cylinder head, the arrangement comprising:
a fixing element detachably fastening the at least one fuel injection valve to a mounting element of the fuel distributor,
wherein a non-cylinder-facing surface of the mounting element of the fuel distributor and a cylinder-facing surface of the fixing element, in the assembled state of the cylinder head and fuel distributor and also the at least one fuel injection valve, are configured as contact surfaces, by means of which, through attachment of the fixing element to the at least one fuel injection valve, it is possible to bring about an axial fixing and a radial orientation of the at least one fuel injection valve in the cylinder head and in the mounting element of the fuel distributor,
wherein the fixing elements has polygonal socket, into which a tool engages to perform a rotational movement of the fixing element, said rotational movement fixing the at least one fuel injection valve to the mounting element.

2. The arrangement according to claim 1 ,
wherein the fixing element is a screw head which has a blind hole which is provided with an internal thread, which, in the assembled state, faces the non-cylinder-facing surface of the mounting element,
wherein the cylinder-facing surface is configured around the blind hole of the fixing element.

3. The arrangement according to claim 2 , wherein the internal thread of the blind hole corresponds to an external thread of a fuel nozzle of the fuel injection valve, which fuel nozzle is configured as a threaded bolt.

4. The arrangement according to claim 1 , wherein a through opening of the mounting element and the non-cylinder-facing surface of the mounting element in the assembled state is orientated predefinably through fastening of the mounting element to the cylinder head, such that an arrangement of the fuel injection valve in an installation channel of the cylinder head and the through opening of the mounting element in a pre-position is possible, wherein the pre-positioning of the mounting element leads simultaneously to a pre-positioning of the non-cylinder-facing surface of the mounting element.

5. The arrangement according to claim 1 ,
wherein, when the at least one fuel injection valve is fixed to the mounting element, the at least one fuel injection valve is secured against rotation in the pre-position opposite the installation channel and the through opening opposite the mounting element of the fuel distributor, and
wherein the fuel nozzle of the fuel injection valve has a projection above the non-cylinder-facing surface.

6. The arrangement according to claim 1 ,
wherein the contact surfaces are flat surfaces by means of which an axial fixing and radial orientation of the fuel injection valve in the cylinder head and on the mounting element is brought about through the cylinder-facing surface of the fixing element being brought to lie opposite the pre-positioned non-cylinder-facing surface of the mounting element and being axially clampable by performing a rotational movement of the fixing element,
wherein, at the same dine, a radial orientation of the fuel injection valve takes place, since the contact surfaces bring about an end positioning of the fuel injection valve through the axial clamping.

7. The arrangement according to claim 1 , further comprising a first gasket arrangement arranged between the combustion chamber and an installation channel of the cylinder head, said gasket arrangement being configured as a ring gasket which seals a tip of the fuel injection valve in relation to the installation channel.

8. The arrangement according to claim 7 , further comprising a second gasket arrangement arranged between the through opening of the mounting element of the fuel distributor and an installation channel of the fuel injection valve.

9. The arrangement according to claim 8 , further comprising a third gasket arrangement arranged between the contact surfaces of the mounting element of the fuel distributor and the fixing element.

10. The arrangement according to claim 9 ,
wherein the second and third gasket arrangements are configured as taper-cone seating, as hemisphere-cone seating, as metal beaded gasket, as biting edge, as bonded joint, as O-ring, as hemp tape seal or as non-ferrous-metal sealing ring, and
wherein the second and third gasket arrangements are configured as identical sealing systems or different sealing systems.

11. A method for producing an arrangement according to claim 1 , comprising:
introducing a fuel injection valve into a cylinder head, into the opening provided for this in the cylinder head,
placing a fuel distributor via a through opening in a mounting element of the fuel distributor onto a stud-like extension of the had injection valve configured as a fuel nozzle, and
fixing the fuel distributor to the cylinder head, which serves as a mounting element for the fuel distributor, and
fixing the fuel injection valve by means of a fixing element to the fuel distributor.

12. A fuel injection system of an internal combustion engine with an arrangement for connecting at least one fuel injection valve to a fuel distributor of the fuel injection system, wherein the at least one fuel injection valve is detachably fastened by means of a fixing element to a mounting element of the fuel distributor, wherein a non-cylinder-facing surface of the mounting element of the fuel distributor and a cylinder-facing surface of the fixing element, in the assembled state of the cylinder head and fuel distributor and also the at least one fuel injection valve, are configured as contact surfaces, by means of which, through attachment of the fixing element to the at least one fuel injection valve, it is possible to bring about an axial fixing and a radial orientation of the at least one fuel injection valve in the cylinder head and in the mounting element,
wherein the fixing element has a polygonal socket, into which a tool engages to perform a rotational, movement of the fixing element, said rotational movement fixing the at least one fuel injection valve to the mounting element.

Assignees

• Volkswagen Ag

Inventors

• Göschel Marcus
• Triebsch Paul

Classifications

• F02M2200/856

  characterised by mounting injector to fuel or common rail, or vice versa · CPC title

• F02M55/02

  Conduits between injection pumps and injectors {, e.g. conduits between pump and common-rail or conduits between common-rail and injectors} · CPC title

• F02M2200/803

  using clamp elements and fastening means; e.g. bolts or screws · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title

• F02M61/14 Primary

  Arrangements of injectors with respect to engines; Mounting of injectors · CPC title