Fuel-piping attachment structure

Patent metadata

Field	Value
Publication number	US-9664164-B2
Application number	US-201314071656-A
Country	US
Kind code	B2
Filing date	Nov 5, 2013
Priority date	Nov 8, 2012
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A fuel-piping attachment structure includes a fuel piping, at least one fastening portion, and a protective member. The at least one fastening portion is to be joined to an internal combustion engine main body to support the fuel piping with respect to the internal combustion engine main body. The protective member includes at least one base portion to be joined to the internal combustion engine main body. All of the at least one fastening portion are disposed on a first side in a Z direction with respect to the axis of the fuel piping. All of the at least one base portion are disposed on a second side in the Z direction with respect to the axis of the fuel piping.

First claim

What is claimed is:

1. A fuel-piping attachment structure comprising:
a fuel piping defining an axis, the fuel piping extending parallel to an injector row including a plurality of injectors aligned in an internal combustion engine main body, each of the injectors defining an axis;
at least one fastening portion to be joined to the internal combustion engine main body to support the fuel piping with respect to the internal combustion engine main body; and
a protective member including at least one base portion to be directly joined to the internal combustion engine main body, the protective member extending so as to cover a side of the fuel piping opposite to the internal combustion engine main body, the protective member having a distal end forming a free end, a direction perpendicular to the axes of the plurality of injectors and the axis of the fuel piping being defined as a Z direction, all of the at least one fastening portion being disposed on a first side with respect to the axis of the fuel piping in the Z direction, all of the at least one base portion being disposed on a second side with respect to the axis of the fuel piping in the Z direction,
wherein a bottom of the fuel piping in a height direction of the internal combustion engine is disposed in the second side.

2. The fuel-piping attachment structure according to claim 1 , wherein the at least one fastening portion is provided to sandwich the plurality of injectors between the at least one fastening portion and the internal combustion engine main body.

3. The fuel-piping attachment structure according to claim 1 ,
wherein the distal end of the protective member is disposed so as to face the at least one fastening portion with a gap between the distal end and the at least one fastening portion, and
wherein, when a load is applied to the protective member, the protective member deforms in a rotational direction about the at least one base portion, and the distal end of the protective member sandwiches the at least one fastening portion between the distal end and the internal combustion engine main body.

4. The fuel-piping attachment structure according to claim 3 ,
wherein the protective member has a first protrusion that extends toward the internal combustion engine main body through the first side in the Z direction, and
wherein the first protrusion is disposed such that when a load is applied to the protective member and when the protective member deforms in a rotational direction about the at least one base portion, the first protrusion comes into contact with the internal combustion engine main body before the distal end sandwiches the at least one fastening portion between the distal end and the internal combustion engine main body.

5. A fuel-piping attachment structure comprising:
a fuel piping defining an axis, the fuel piping extending parallel to an injector row including a plurality of injectors aligned in an internal combustion engine main body, each of the injectors defining an axis;
at least one fastening portion to be joined to the internal combustion engine main body to support the fuel piping with respect to the internal combustion engine main body;
a protective member including at least one base portion to be joined to the internal combustion engine main body, the protective member extending so as to cover a side of the fuel piping opposite to the internal combustion engine main body, the protective member having a distal end forming a free end, a direction perpendicular to the axes of the plurality of injectors and the axis of the fuel piping being defined as a Z direction, all of the at least one fastening portion being disposed on a first side with respect to the axis of the fuel piping in the Z direction, all of the at least one base portion being disposed on a second side with respect to the axis of the fuel piping in the Z direction; and
an elastic member that covers the fuel piping and that is engaged with the first protrusion, the elastic member being provided between the fuel piping and the protective member,
wherein the distal end of the protective member is disposed so as to face the at least one fastening portion with a gap between the distal end and the at least one fastening portion,
wherein, when a load is applied to the protective member, the protective member deforms in a rotational direction about the at least one base portion, and the distal end of the protective member sandwiches the at least one fastening portion between the distal end and the internal combustion engine main body,
wherein the protective member has a first protrusion that extends toward the internal combustion engine main body through the first side in the Z direction, and
wherein the first protrusion is disposed such that when a load is applied to the protective member and when the protective member deforms in a rotational direction about the at least one base portion, the first protrusion comes into contact with the internal combustion engine main body before the distal end sandwiches the at least one fastening portion between the distal end and the internal combustion engine main body.

6. The fuel-piping attachment structure according to claim 4 , further comprising:
a fuel pressure sensor provided so as to protrude from the fuel piping to the second side in the Z direction,
wherein the protective member has an overhang portion protruded so as to cover a side of the fuel pressure sensor opposite to the internal combustion engine main body, and
wherein the overhang portion and the first protrusion are provided in parts that correspond to each other with respect to the Z direction.

7. The fuel-piping attachment structure according to claim 6 ,
wherein the protective member has at least two second protrusions that extend toward the internal combustion engine main body through the second side in the Z direction, and
wherein the second protrusions are protruded from two sides of the overhang portion, the two sides of the overhang portion being spaced in the axis of the fuel piping.

8. The fuel-piping attachment structure according to claim 1 ,
wherein each of the at least one fastening portion has a receiving hole to receive an end of each of the plurality of injectors, and
wherein the at least one fastening portion is fastened with bolts to the internal combustion engine main body at at least two positions at which each of the plurality of injectors is sandwiched between each of the at least one fastening portion and the internal combustion engine main body along the axis of the fuel piping.

9. The fuel-piping attachment structure according to claim 1 , wherein the first side and the second side are opposed about the axis of the fuel piping in the Z direction such that the first side and the second side form opposite sides relative to the fuel piping.

10. The fuel-piping attachment structure according to claim 1 , wherein the plurality of injectors are provided on the first side in the Z direction with respect to the axis of the fuel piping.

11. The fuel-piping attachment structure according to claim 1 ,
wherein the distal end extends in a direction along the axis of the fuel piping and the free end has a distal end edge that freely extends along an entirety of the distal end with respect to the axis of the fuel piping.

12. A fuel-piping attachment structure comprising:
a fuel piping defining an axis, the fuel piping extending parallel to an injector row including a plurality of injectors aligned in an internal combustion engine main body, each of the injectors defining an axis;
at least one fastening portion to be joined to the internal combustion engine main body to support the fuel

Assignees

• Honda Motor Co Ltd

Inventors

• Imakita Akio
• Kaneda Fumio
• Kojima Hiroyuki

Classifications

• F02M55/025 Primary

  Common rails · CPC title

• F02M69/465

  of fuel rails · CPC title

• F02M61/14

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

• F02M2200/857

  characterised by mounting fuel or common rail to engine · CPC title

• F02M2200/185

  means for improving crash safety · CPC title