Integrated sealing and positioning structure for fuel rail

Patent metadata

Field	Value
Publication number	US-9441591-B2
Application number	US-201313839767-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A mounting assembly for mounting a fuel injector to a fuel rail. The mounting assembly includes a mounting boss and a fuel cup. The mounting boss is configured to be mounted to the fuel rail and receive a bolt within the mounting boss to couple the fuel rail to a cylinder head. The fuel cup is coupled to the mounting boss and configured to receive the fuel injector therein, as well as be mounted to the fuel rail to direct fuel from the fuel rail to the fuel injector.

First claim

What is claimed is:

1. A mounting assembly for mounting a fuel injector to a fuel rail comprising:
a mounting boss configured to be mounted to the fuel rail and receive a bolt within the mounting boss to couple the fuel rail to a cylinder head;
a fuel cup coupled to the mounting boss configured to receive the fuel injector therein and be mounted to the fuel rail to direct fuel from the fuel rail to the fuel injector; and
a coupling member that couples the fuel cup to the mounting boss, the coupling member includes a fuel cup flange that extends into the fuel cup and is coupled to the fuel cup by brazing to couple the coupling member to the fuel cup;
wherein the coupling member includes a coupling member aperture surface defining a coupling aperture, the mounting boss defines a mounting boss aperture, the coupling aperture has an inner diameter that is less than an inner diameter of the mounting boss aperture, and the coupling member aperture surface faces a portion of the bolt that is devoid of threads.

2. The mounting assembly of claim 1 , wherein the mounting boss is non-rigidly coupled to the fuel cup.

3. The mounting assembly of claim 1 , wherein the fuel cup is coupled to the mounting boss such that the fuel cup and the mounting boss are aligned along parallel axes.

4. The mounting assembly of claim 1 , wherein the coupling member defines an aperture aligned with an axial center of the mounting boss.

5. A mounting assembly for mounting a fuel injector to a fuel rail comprising:
a fuel cup configured to receive a fuel injector therein and be mounted to a fuel rail to direct fuel from the fuel rail to the fuel injector; and
a mounting boss configured to be mounted to the fuel rail and receive a bolt within the mounting boss to couple the fuel rail to a cylinder head; and
a coupling member coupling the fuel cup to the mounting boss to align the fuel cup and the mounting boss along a first axis of the fuel cup that extends parallel to a second axis of the mounting boss, the coupling member includes a fuel cup flange that extends into the fuel cup and is coupled to the fuel cup by brazing to couple the coupling member to the fuel cup;
wherein the coupling member includes a coupling member aperture surface defining a coupling aperture, the mounting boss defines a mounting boss aperture, the coupling aperture has an inner diameter that is less than an inner diameter of the mounting boss aperture, and the coupling member aperture surface faces a portion of the bolt that is devoid of threads.

6. The mounting assembly of claim 5 , wherein the first axis extends through an axial center of the fuel cup and the second axis extends through an axial center of the mounting boss.

7. The mounting assembly of claim 5 , wherein the coupling member includes a flange that extends into an aperture defined by the mounting boss thereby reducing the aperture's diameter at the flange.

8. The mounting assembly of claim 5 , wherein the coupling member and the mounting boss are brazed together.

9. A mounting assembly for mounting a fuel injector to a fuel rail comprising:
a fuel cup configured to be mounted to the fuel rail and receive a fuel inlet end of the fuel injector within the fuel cup, and align the fuel injector along a first longitudinal line; and
a coupling member extending from the fuel cup and defining an aperture of the coupling member, the coupling member configured to extend to and couple with a mounting boss mounted to the fuel rail, the coupling member configured to align a bolt extending through the mounting boss and the aperture along a second longitudinal line that is parallel to the first longitudinal line, the coupling member includes a fuel cup flange that extends into the fuel cup and is coupled to the fuel cup by brazing to couple the coupling member to the fuel cup;
wherein the coupling member includes a coupling member aperture surface defining a coupling aperture, the mounting boss defines a mounting boss aperture, the coupling aperture has an inner diameter that is less than an inner diameter of the mounting boss aperture, and the coupling member aperture surface faces a portion of the bolt that is devoid of threads.

10. The mounting assembly of claim 9 , wherein the aperture of the coupling member is at least partially defined by the fuel cup flange.

11. The mounting assembly of claim 9 , wherein the fuel cup flange at least partially defines the aperture configured to receive the fuel injector therein.

12. The mounting assembly of claim 11 , wherein the fuel cup flange is between a seal of the fuel injector and the fuel cup, the fuel cup flange extends into the fuel cup toward a base of the fuel cup and beyond a portion of the seal closest to the base.

13. The mounting assembly of claim 1 , wherein the fuel cup flange is between a seal of the fuel injector and the fuel cup when the fuel injector is mounted to the fuel rail, the fuel cup flange extends into the fuel cup toward a base of the fuel cup and beyond a portion of the seal closest to the base.

14. The mounting assembly of claim 5 , wherein the fuel cup flange is between a seal of the fuel injector and the fuel cup when the fuel injector is mounted to the fuel rail, the fuel cup flange extends into the fuel cup toward a base of the fuel cup and beyond a portion of the seal closest to the base.

15. The mounting assembly of claim 1 , wherein the fuel cup flange is monolithic with the coupling member.

16. The mounding assembly of claim 5 , wherein the fuel cup flange is monolithic with the coupling member.

17. The mounting assembly of claim 9 , wherein the fuel cup flange is monolithic with the coupling member.

Assignees

• Denso Int America Inc

Inventors

• Ramamurthy Dhyana
• Roseborsky Steven

Classifications

• F02M61/168

  Assembling; Disassembling; Manufacturing; Adjusting · CPC title

• F02M2200/856

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

• F02M61/145

  the injection nozzle opening into the air intake conduit · CPC title

• F02M69/465

  of fuel rails · CPC title

• F02M2200/855

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