Injector system

Patent metadata

Field	Value
Publication number	US-9745938-B2
Application number	US-201113996690-A
Country	US
Kind code	B2
Filing date	Nov 4, 2011
Priority date	Dec 23, 2010
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

An injector system which is in particular used as an injector block for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines includes a fuel distribution rail, a counter bracket, a first injector, and at least one second injector. Here, the counter bracket has a first connecting piece and a second connecting piece. The first injector is joined to the counter bracket on an input side of the first connecting piece with the aid of an elastic sealing ring. The second injector is joined to the counter bracket on an input side of the second connecting piece with the aid of an elastic sealing ring. In this case, the counter bracket is connected to the fuel distribution rail. The fuel distribution rail is used for distributing compressed natural gas to the injectors. The injector system has a compact design.

First claim

What is claimed is:

1. An injector system for a fuel injection system of a mixture-compressing, spark-ignited internal combustion engine, comprising:
a fuel distribution rail;
a counter bracket having a first connecting piece and at least one second connecting piece, wherein the counter bracket is connected to the fuel distribution rail by separate connecting elements;
a first injector joined at least indirectly to the counter bracket on an input side of the first connecting piece; and
at least one second injector joined at least indirectly to the counter bracket on an input side of the second connecting piece;
wherein the fuel distribution rail is to distribute fuel through a bottom side of the fuel distribution rail to the first injector and the at least one second injector,
wherein the first connecting piece and the second connecting piece each have one hose nipple on an output side,
wherein the injector system is provided to guide the fuel from the fuel distribution rail through the bottom side of the fuel distribution rail, through the first injector and through the first connecting piece of the counter bracket to the hose nipple of the first connecting piece,
wherein the injector system is provided to guide the fuel from the fuel distribution rail through the bottom side of the fuel distribution rail, through the second injector and through the second connecting piece of the counter bracket to the hose nipple of the second connecting piece,
wherein the bottom side of the fuel distribution rail faces the counter bracket, and
wherein the first injector and the second injector are each are at least one of: (i) clamped between the counter bracket and the fuel distribution rail, and (ii) mounted in a floating manner with respect to the counter bracket.

2. The injector system as recited in claim 1 , wherein the fuel distribution rail is to distribute natural gas to the injectors.

3. The injector system as recited in claim 1 , wherein the counter bracket is a plastic-based plastic part.

4. The injector system as recited in claim 1 , wherein the counter bracket and the first connecting piece and the second connecting piece are made of at least one metallic material and the first connecting piece and the second connecting piece are connected to the counter bracket in at least one of a form-locked and force-fitted manner.

5. The injector system as recited in claim 1 , wherein the first injector and the at least one second injector are each joined to the counter bracket with the aid of at least one elastic sealing.

6. The injector system as recited in claim 1 , wherein the counter bracket is connected to the fuel distribution rail by separate connecting elements.

7. The injector system as recited in claim 1 , wherein at least one connecting element is implemented on the counter bracket and the connecting element of the counter bracket is connected to the fuel distribution rail.

8. The injector system as recited in claim 1 , wherein injector cups, into each of which one injector is inserted, are provided on the fuel distribution rail.

9. The injector system as recited in claim 8 , wherein the injectors are each connected to an associated one of the injector cups via a connecting clamp.

10. The injector system as recited in claim 1 , wherein the fuel distribution rail includes an aluminum extrusion profile.

11. The injector system as recited in claim 1 , wherein the fuel distribution rail is formed from a soldered stainless steel part.

12. The injector system as recited in claim 1 , wherein the fuel distribution rail is to distribute natural gas to the injectors, wherein the first connecting piece and the second connecting piece each have one hose nipple on an output side.

13. The injector system as recited in claim 12 , wherein the counter bracket is a plastic-based plastic part.

14. The injector system as recited in claim 12 , wherein the counter bracket and the first connecting piece and the second connecting piece are made of at least one metallic material and the first connecting piece and the second connecting piece are connected to the counter bracket in at least one of a form-locked and force-fitted manner.

15. The injector system as recited in claim 12 , wherein the first injector and the at least one second injector are each joined to the counter bracket with the aid of at least one elastic sealing.

16. The injector system as recited in claim 1 , wherein the fuel distribution rail includes an aluminum extrusion profile, or wherein the fuel distribution rail is formed from a soldered stainless steel part.

Assignees

• Stahr Wolf
• Haug Martin
• Kirschner Horst
• Miller Frank
• Bosch Gmbh Robert

Inventors

• Stahr Wolf
• Haug Martin
• Kirschner Horst
• Miller Frank

Classifications

• F02M21/0215

  Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas · CPC title

• F02M61/14

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

• F02M69/465 Primary

  of fuel rails · CPC title

• F02M21/0281

  Adapters, sockets or the like to mount injection valves onto engines; Fuel guiding passages between injectors and the air intake system or the combustion chamber · CPC title

• F02D19/027

  Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position · CPC title