System having a fuel distributor and multiple fuel injectors

Patent metadata

Field	Value
Publication number	US-10648439-B2
Application number	US-201314397383-A
Country	US
Kind code	B2
Filing date	Mar 22, 2013
Priority date	Apr 26, 2012
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A system, which is used especially as a fuel injection system for the high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each fuel injector is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a holding element. The holding element has an at least essentially straight first leg and an at least essentially straight second leg. The cup includes at least one recess, which extends through a wall of the cup. The first leg and the second leg are guided through the at least one recess. Furthermore, the connection sleeve of the fuel injector has a collar, which is braced on the first leg of the holding element and on the second leg of the holding element in order to secure the fuel injector on the cup.

First claim

What is claimed is:

1. A system, comprising:
a fuel distributor; and
a plurality of fuel injectors, each fuel injector being situated on an associated cup of the fuel distributor, and at least one of the fuel injectors being fastened to the associated cup by a holding element, wherein:
the holding element has an at least substantially straight first leg and an at least substantially straight second leg,
the cup has at least one through hole extending through a wall of the cup,
the first leg and the second leg are at least partially routed through the at least one through hole, and
a connection sleeve of the fuel injector has a collar that is braced on the first leg of the holding element and on the second leg of the holding element such that the first leg and the second leg are at least partially situated between, in a direction perpendicular to a longitudinal axis of the cup, the collar and a respective inner side of the cup in order to secure the fuel injector on the cup, wherein, with respect to a joining direction of the holder and the cup, an upper inner side of each leg adjoins the collar and an outer side of each leg adjoins the inner side of the cup, wherein the joining direction is perpendicular to the longitudinal axis of the cup,

wherein the fuel injector is clamped on the cup with a clamp directed through four through-holes in the wall of the injector cup.

2. The system as recited in claim 1 , wherein the system is a fuel injection system for a high-pressure injection in an internal combustion engine.

3. The system as recited in claim 1 , wherein the first leg and the second leg lie at least approximately in a plane that is perpendicular to a longitudinal axis of the cup.

4. The system as recited in claim 1 , wherein the first leg and the second leg of the holding element are not oriented parallel to each other in an initial state.

5. The system as recited in claim 1 , wherein the first leg and the second leg of the holding element are pivoted relative to each other so as to clamp the holding element in the at least one through hole.

6. The system as recited in claim 1 , wherein at least one of:
a contact surface is present on the first leg of the holding element, on which the collar of the connection sleeve of the fuel injector rests against the first leg, and
a contact surface is present on the second leg of the holding element, on which the collar of the connection sleeve of the fuel injector rests against the second leg.

7. The system as recited in claim 6 , wherein the contact surface of the first leg includes an embossed region, and the contact surface of the second leg includes an embossed region.

8. The system as recited in claim 1 , wherein at least one of:
a keyed connection is present between the first leg of the holding element and the collar of the connection sleeve of the fuel injector, which fixates the holding element relative to the cup, and
a keyed connection is formed between the second leg of the holding element and the collar of the connection sleeve of the fuel injector, which fixates the holding element relative to the cup.

9. The system as recited in claim 1 , wherein at least one of:
the first leg of the holding element has a rectangular profile, and
the second leg of the holding element has a rectangular profile.

10. The system as recited in claim 1 , wherein at least one of:
in a region of the connection sleeve of the fuel injector, the first leg has a fixation section which is bent radially outward in relation to a longitudinal axis of the cup, and
the second leg has a fixation section in the region of the connection sleeve of the fuel injector, the fixation section of the second leg being is bent radially outward in relation to the longitudinal axis of the cup.

11. The system as recited in claim 10 , wherein:
the connection sleeve of the fuel injector has a contact surface which is at least partially developed in a shape of a cylindrical sleeve, and
one of the fixation section of the first leg and the fixation section of the second leg has a low radial clearance at the contact surface of the connection sleeve.

12. The system as recited in claim 1 , wherein:
the holding element includes a bracket that connects the first leg to the second leg, and
a stop on the bracket strikes against an outer side of the cup.

13. The system as recited in claim 12 , wherein the stop of the bracket is formed by a folded-over part of the bracket.

14. The system as recited in claim 12 , wherein the stop of the bracket is formed by a stop part that is connected to the bracket.

15. A system, comprising:
a fuel distributor; and
a plurality of fuel injectors, each fuel injector being situated on an associated cup of the fuel distributor, and at least one of the fuel injectors being fastened to the associated cup by a holding element, wherein:
the holding element has an at least substantially straight first leg and an at least substantially straight second leg,
the cup has at least two through holes extending through a wall of the cup,
the first leg and the second leg are at least partially routed through a respective through hole of the at least two through holes, and
a connection sleeve of the fuel injector has a collar that is braced on the first leg of the holding element and on the second leg of the holding element in order to secure the fuel injector on the cup,
wherein two through holes of the at least two through holes extend through the wall of the cup to respectively two opposite sides of the wall, wherein the two through holes are in the form of through-bores, and wherein the wall is circumferentially closed except for the through holes.

16. The system as recited in claim 15 , wherein the system is a fuel injection system for a high-pressure injection in an internal combustion engine.

17. The system as recited in claim 15 , wherein the first leg and the second leg lie at least approximately in a plane that is perpendicular to a longitudinal axis of the cup.

18. The system as recited in claim 15 , wherein the first leg and the second leg of the holding element are not oriented parallel to each other in an initial state.

19. The system as recited in claim 15 , wherein the first leg and the second leg of the holding element are pivoted relative to each other so as to clamp the holding element in the at least two through holes.

20. The system as recited in claim 15 , wherein at least one of:
a contact surface is present on the first leg of the holding element, on which the collar of the connection sleeve of the fuel injector rests against the first leg, and
a contact surface is present on the second leg of the holding element, on which the collar of the connection sleeve of the fuel injector rests against the second leg.

21. The system as recited in claim 20 , wherein the contact surface of the first leg includes an embossed region, and the contact surface of the second leg includes an embossed region.

22. The system as recited in claim 15 , wherein at least one of:
a keyed connection is present between the first leg of the holding element and the collar of the connection sleeve of the fuel injector, which fixates the holding element relative to the cup, and
a keyed connection is formed between the second leg of the holding element and the collar of the connection sleeve of the fuel injector, which fixates the holding element relative to the cup.

23. The system as recited in claim 15 , where

Assignees

• Bosch Gmbh Robert

Inventors

• Pohlmann Jens
• Bolz Thilo
• Ittlinger Ralph
• Guengoer Goekhan
• Froihofer Thomas

Classifications

• F02M61/168

  Assembling; Disassembling; Manufacturing; Adjusting · CPC title

• F02M41/00

  Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor · CPC title

• F02M2200/853

  involving use of quick-acting mechanism, e.g. clips · CPC title

• F02M2200/8023

  the assembly involving use of quick-acting mechanisms, e.g. clips · CPC title

• F02M61/14 Primary

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