JP2535132Y2 - Fuel injector mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injector mounting apparatus having a plurality of fuel injection holes.

[0002]

2. Description of the Related Art In a normal fuel injection valve having a single fuel injection hole, the fuel injection direction is constant without positioning around the axis, but a plurality of fuel injection holes are required. In order to inject fuel in a predetermined direction, it is necessary to mount the fuel injection valve so as to be positioned around the axis.

[0003] For example, Japanese Utility Model Laid-Open Publication No. 61-41864 discloses a delivery pipe 2 as shown in FIGS.
A positioning member 25 which is positioned near the fuel injector mounting portion 22 to determine the position of the coupler 24 in the rotational direction about the axis of the injector by contacting the coupler 24 of the fuel injector 23.
Are disclosed. In FIG. 3, 2
Reference numeral 6 denotes an intake pipe, into which an end of the fuel injection valve 23 is inserted into an inlet port 27, and which is connected to a fuel injection hole on the end face of the intake pipe 26.
Fuel is injected inside.

[0004] A similar configuration is also disclosed in Japanese Utility Model Application Laid-Open No. 63-87272.

[0005]

However, since the positioning member 25 is integrally fixed to the delivery pipe 21 by welding, there is a problem that the manufacturing cost is high, and the mounting position accuracy of the positioning member 25 is increased. The positioning accuracy of the fuel injection valve 23 is deteriorated due to the variation of the mounting position, or the positioning member 25 interferes with the coupler 24 to cause the mounting state of the fuel injection valve 23 to be unreasonable. There is a problem that fuel may leak from the seal portion 28 of the fuel cell 22.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a fuel injection valve mounting device which can be positioned at a low cost with high accuracy in positioning the fuel injection valve around its axis.

[0007]

According to the present invention, a cylindrical holder for fitting and connecting a fuel introduction portion of a fuel injection valve is provided integrally with a delivery pipe for distributing fuel. In the case where the coupler is mounted in the intersecting direction, an engagement groove is formed on the outer periphery of the holder, and the first engagement portion is elastically press-fitted on the outer periphery of the holder and engages with the engagement groove. A positioning member made of a product is provided,
The positioning member is integrally formed with a second engaging portion which engages with the delivery pipe to determine the position of the positioning member itself around the axis, and engages with both side surfaces of the coupler to form the axis of the fuel injection valve. A third engaging portion for determining a surrounding position is integrally formed.

[0008]

According to the present invention, since the positioning member made of a molded product is used, the manufacturing cost can be reduced and the dimensional accuracy is high, and the first engaging portion of the positioning member is engaged with the engaging groove of the holder. The positioning member can be fixed to the delivery pipe and the holder with high positional accuracy by engaging the second engagement portion with the delivery pipe,
By engaging the coupler of the fuel injection valve with the third engagement portion of the positioning member, it is possible to accurately position the fuel injection valve around the axis and to cause a fuel leak due to excessive mounting of the fuel injection valve. There is no fear of doing it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a fuel injection valve, and a pair of fuel injection holes 2, 3 for injecting fuel in two directions at one end face.
have. One end of the fuel injection valve 1 is inserted into an inlet 5 of an intake pipe 4, and air leakage is prevented by a ring-shaped grommet 6. The other end of the fuel injection valve 1 is provided with a fuel introduction section 7.

Reference numeral 8 denotes a delivery pipe composed of a square pipe for distributing fuel to each fuel injection valve 1, and a cylindrical holder 9 is integrally fixed to a position where each fuel injection valve 1 is disposed. The fuel introduction portion 7 of the fuel injection valve 1 is inserted into the holder 9, and the O-ring 10 prevents fuel leakage. An annular engaging groove 11 is formed on the outer periphery of the tip of the holder 9.
Are formed. The delivery pipe 8 is a bracket 12
And is fixed to the intake pipe 4 by bolts 13.

In the vicinity of the rear end of the fuel injection valve 1, a coupler 14 is mounted obliquely rearward so as to cross the axis of the fuel injection valve 1. The coupler 14 has a rectangular cross section.

Reference numeral 15 denotes a positioning member made of a synthetic resin molded product. The positioning member 15 is elastically press-fitted on the outer periphery of the holder 9 and engages with the engagement groove 11 to thereby move the positioning member 15 in the axial direction of the holder 9. The first engagement portion 16 in the shape of an arc positioned on the delivery pipe 8 and the holder 9
And a second engaging portion 17 that engages on both sides of the fuel injection valve 1 to prevent rotation of the positioning member 15 and prevents the rotation of the fuel injection valve 1 around its axis so that the fuel injection valve 1 is positioned in the rotational direction. It has a U-shaped third engaging portion 18 that engages with both side surfaces of the rectangular coupler 14.

According to the above configuration, since the positioning member 15 is made of a molded product made of synthetic resin, the cost can be reduced as compared with the case where the positioning member 15 is fixed to the delivery pipe 8 by welding, and the dimensional accuracy can be reduced. Of high stability can be obtained stably. On the other hand, the delivery pipe 8 has the fuel injection valve 1
Simply fix the cylindrical holder 9 at the position of
The fuel injection valve 1 can be shared regardless of the presence or absence of the positioning member 15.

When the fuel injection valve 1 needs to be positioned and mounted around the axis, the positioning member 15 is required.
The first engaging portion 16 is press-fitted to the outer periphery of the holder to engage with the engaging groove 11, and the second engaging portion 17 is engaged with the delivery pipe 8, whereby the positioning member 15 It is fixed to the holder 9 with high positional accuracy. Next, the third engaging portion 18 of the positioning member 15
When the fuel introduction portion 7 is inserted into the holder 9 and the fuel injection valve 1 is mounted while the coupler 14 is being engaged with the coupler 14, the dimensional accuracy of the positioning member 5 is high and the accuracy of the mounting position is also high.
The fuel injection valve 1 can be accurately positioned around the axis.
In addition, there is no possibility that the fuel injection valve 1 interferes with the positioning member 5 to cause the mounting state of the fuel injection valve 1 to be excessive, and there is no possibility that the fuel leaks from the O-ring 10.

[0016]

According to the fuel injection valve mounting device of the present invention, since the positioning member made of a molded product is used, it can be manufactured at a low cost and has high dimensional accuracy. Engage with the engaging groove of the holder,
By engaging the engaging portion with the delivery pipe, the positioning member can be fixed to the delivery pipe and the holder with high positional accuracy, and by engaging the coupler of the fuel injection valve with the third engaging portion of the positioning member. , The positioning of the fuel injection valve around the axis can be performed accurately at low cost.
In addition, there is no danger that the fuel injection valve will be mounted in an unreasonable manner, causing a fuel leak, and the delivery pipe may be used regardless of whether or not the positioning of the fuel injection valve around the axis is required. It has the effect that it can be shared.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is a longitudinal sectional view of a conventional example.

FIG. 4 is a view as viewed in the direction of arrows AA in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel injection valve 7 Fuel introduction part 8 Delivery pipe 9 Holder 11 Engagement groove 14 Coupler 15 Positioning member 16 First engagement part 17 Second engagement part 18 Third engagement part

Claims (1)

(57) [Scope of request for utility model registration] A cylindrical holder for fitting and connecting a fuel introduction portion of a fuel injection valve is provided integrally with a delivery pipe for distributing fuel, and a coupler is provided on the fuel injection valve in a direction crossing the axis thereof.
In those over is attached to form a engaging groove on the outer periphery of the holder, consisting of a molded article having a first engagement portion engaged with the engaging grooves while elastically press fit on the outer periphery of the holder Positioning
A member is provided, and the positioning member is engaged with the delivery pipe to determine the position.
The second engaging portion for determining the position of the member itself around the axis is
Integrally formed and engaged on both sides of the coupler around the axis of the fuel injection valve
A third engaging portion for determining a position of the fuel injection valve is integrally formed .