JPH1182231A - Fuel injection nozzle mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal combustion engine fuel injection nozzle mounting device that is proper in a mounting position, and besides, there is no looseness at all. SOLUTION: One end of a tubular body is formed into a trumpet-shaped part made to an insertional part of a fuel injection nozzle 9, and a connector 21 formed with plural pieces of engagement receiving parts, a ring base body 29 to be installed around the fuel injection nozzle 9, and a holder 22 to be formed with plural pieces of pinched pieces 30 erected in parallel with an axis of the base body 29 from itself, and also formed with a locked claw to be snap-locked in a gap with the engagement receiving part of the connector 21, at an end of this pinched piece 30 are all installed in a surface of a peripheral edge flange 26 of this trumpet-shaped part. The fuel injection nozzle 9 to be held by this holder 22 is made inseparable from the connector 21 by means of engagement between the holder 22 and the connector 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection nozzle mounting device for an internal combustion engine for an automobile.

[0002]

2. Description of the Related Art FIG. 15 shows an internal combustion engine for a vehicle having a delivery pipe to which a fuel injection nozzle is mounted. In FIG. 15, reference numeral 2 denotes a cylinder block. A cylinder bore 3 and a piston 4 are provided in the cylinder block 2, and the piston 4 reciprocates in the cylinder bore 3. A cylinder head 5 is provided above the cylinder bore 3, and a spark plug 6 and an intake valve 7 are mounted on the cylinder head 5. An intake manifold 8 is connected to the cylinder head 5 in a lateral direction, and a fuel injection nozzle 9 is mounted diagonally above the intake manifold 8. The fuel injection nozzle 9 is connected to a delivery pipe 11 via a connector 10 as shown in FIGS.

This delivery pipe 11 is shown in FIGS.
As shown in FIG. 8, it is an elongated cylindrical body having a rectangular cross section, one end of which is closed and a conduit 12 connected to the other end. The lower surface of the delivery pipe 11 has, for example, four holes 1.
3 are formed, and the holes 13 are formed in FIG.
A connector 10 as shown in FIG. The fuel injection nozzle 9 is inserted into the connector 10, and fuel is supplied to the fuel injection nozzle 9 via the delivery pipe 11 and the connector 10.

As shown in FIGS. 19 and 20, the connector 10 has a cylindrical large-diameter fuel injection nozzle insertion portion 14,
A small-diameter connection portion 15 to the delivery pipe following the fuel injection nozzle insertion portion 14 is formed by machining from a steel material by machining. At one position on the outer peripheral surface of the fuel injection nozzle insertion portion 14, a protruding rectangular positioning portion 16 is formed. The connector 10 is always properly mounted at a predetermined angular position so that fuel from the fuel injection nozzle 9 is injected into the internal combustion engine.

[0005]

When the fuel injection nozzle 9 is inserted into the conventional connector 10, the fuel injection nozzle 9 and the nectar 10 are always positioned at a predetermined angular position by the positioning portion 16. However, since the fuel injection nozzle 9 is only inserted into the connector 10, there is a problem that the fuel injection nozzle 9 is loosened with respect to the connector 10 due to vibration or the like during running of the automobile.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a fuel injection nozzle in which a mounting position of a fuel injection nozzle to a connector is appropriate and a fuel injection nozzle is not loosened with respect to the connector. It is an object of the present invention to provide an injection nozzle mounting device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, a fuel injection nozzle mounting device of the present invention has a cylindrical main body having an insertion portion for a fuel injection nozzle at one end. A connector in which a plurality of engagement receiving portions are formed at intervals in the circumferential direction on a surface of a peripheral flange formed at one end, and a base mounted on the fuel injection nozzle, or from the fuel injection nozzle to the fuel injection nozzle. A plurality of holding pieces protruding in parallel with the axis, and a holder having a locking claw formed at a tip end of the holding piece at an engagement receiving portion of the connector; A dowel is detachably engaged with the engagement receiving portion on the surface of the peripheral flange.

Further, according to the present invention, a fuel injection nozzle mounting device has a cylindrical main body having an insertion portion for a fuel injection nozzle at one end, and a circumferential flange formed at one end of the fuel injection nozzle. A connector having a notch formed therein and a plurality of holding pieces projecting from the base mounted on the fuel injection nozzle in parallel with the axis of the fuel injection nozzle are formed. Having a holder formed with
Each of the holding pieces is inserted into the notch hole, and the hook of the holding piece engages with the edge of the notch hole to lock the holder to the connector.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the fuel injection nozzle mounting device according to the present invention will be described below with reference to FIGS. The description of the same components as those shown in the drawings showing the prior art is omitted.

As shown in FIGS. 1 and 2, a fuel injection nozzle mounting device (hereinafter, referred to as a mounting device) 20 has a connector 21 and a holder 22. Then, as shown in FIG. 4, the connector 21 includes an insertion portion 23 of the fuel injection nozzle 9 and a connection portion 24 to the delivery pipe 11 on the base end side, which are main portions thereof.

As shown in FIG. 4, the insertion portion 23 is a cylindrical body made of a steel plate, and the tip side 25 is formed in a conical surface that spreads in a flared manner.
It is inserted into the inner peripheral surface of this insertion portion 23. Then, as shown in FIG.
6 are formed, and two notches 27 are formed in the flange 26 at intervals of, for example, 180 °. On the flange 26, for example, at a position of 90 ° between the notches 27,
A chevron convex portion 28 as an engagement receiving portion whose cross section is shown in FIG.
However, two pieces are formed at one location with an interval corresponding to the width of a locking claw of the holder 22 described later.

At the base end of the insertion portion 23, there is formed the connection portion 24 to the delivery pipe 11 which is narrowed down from the cylindrical body and has a small diameter. As shown in FIG. 2, a hole 13 on the lower surface of the delivery pipe 11 is formed.
The connector 21 is fixed to the delivery pipe 11.

The holder 22 is formed, for example, by cutting out a steel material, and as shown in FIG.
, A clamping piece 30 and a locking claw 31 at the tip thereof. The base body 29 is an annular body having an inner diameter corresponding to the outer diameter of the fuel injection nozzle 9, and has an electric connector part (for opening and closing control of an electromagnetic valve) of the fuel injection nozzle 9 at a part in the width direction.
A notch recess 33 having a width corresponding to the width of 32 (FIG. 1) is formed at the upper edge of the base 29 in FIG. 7 over a part of the axial depth of the annular body. On the upper surface 34 of the base 29 in the drawing, the two holding pieces 30 erected in parallel with the axis of the base 29 are erected at 180 ° intervals. 7 and 8, the rectangular locking claw 31 is formed facing the center of the base 29 and locked between two adjacent chevron convex portions 28 of the connector 21. As shown in FIG. I have. The holding piece 30 preferably has a habit of deforming inward in the radial direction.

Next, the operation of the mounting device 20 will be described.

First, the connector 21 is fixed to the delivery pipe 11 such that the ridge line of the chevron 28 is in a predetermined direction (for example, a direction parallel to the length direction of the delivery pipe 11). Next, the body 35 of the fuel injection nozzle 9 is connected to the base 36 of the electrical connector 32 (FIG. 1).
Is inserted into the cutout recess 33 of the holder 22 and is supported in the holder 22.
1 through the notch 27 of the connector 21 from below to above in FIG.
Is positioned on the upper surface side of the flange 26 of the connector 21. Next, by rotating the holder 22, the locking claw 31 of the holding piece 30 is snapped between the two convex portions 28 by elastically riding over one of the pair of convex portions 28. The fuel injection nozzle 9 does not come off the connector 21, and the fuel injection nozzle 9 can keep the connector 21 at a predetermined rotation position. The holding piece 30 is always in contact with the peripheral edge of the flange 26 because it has a tendency to deform inward as described above.

FIG. 10 shows a modified embodiment in which two notches formed in the peripheral flange 26 of the connector 21 are square notches 37. In this modified embodiment, the connector 21 is not provided with the chevron 28 shown in FIG. As shown in FIG. 11, the end face 38 of the locking claw 31 of the holding piece 30 of the holder 22 is inclined so as to retreat toward the tip. In this modified embodiment, the insertion piece 30 is inserted into the notch 37 from the lower side to the upper side. At this time, the inclined end surface 38 contacts the inner edge of the hole 37 and passes through the locking claw 31 while being gradually elastically deformed outward.
After the passage is completed, the locking claw 31 is elastically snap-engaged with the inner edge of the hole 37, and the holder 22 is locked to the connector 21 while holding the fuel injection nozzle 9. Thus, the mounting and holding of the fuel injection nozzle 9 is completed.

FIGS. 12 to 14 show an embodiment in which the bases of a pair of holding pieces 30 corresponding to the holding pieces 30 of the holder 22 are directly and integrally attached to the body 35 of the fuel injection nozzle 9. By forming the holder 39 so as to have the holding piece 30 integral with the fuel injection nozzle 9, the notch recess 33 (FIG. 7) to be fitted to the electric connector portion 32 is unnecessary. And the length of the holding piece 30 can be shortened.

[0018]

As described above, in the fuel injection nozzle mounting device of the present invention according to claims 1 and 2, one end of the cylindrical main body is formed as an insertion portion of the fuel injection nozzle, and is formed at this one end. A connector having a plurality of engagement receiving portions formed on the surface of the peripheral flange, and a plurality of clamping pieces projecting from the base mounted on the fuel injection nozzle or from the fuel injection nozzle itself in parallel to the axis of the fuel injection nozzle. The fuel injection nozzle has a holder formed at the distal end of the holding piece and formed with a locking claw that can be locked to the engagement receiving portion of the connector. Since the tip of the piece is supported, the connector does not loosen, and the correct position is always maintained with respect to the connector by the engagement between the engaging claw and the receiving portion at the tip of the holding piece. But Kill. And these can be achieved by inexpensive means. Further, when the holder is formed integrally with the fuel injection nozzle, an effect is obtained that the fuel injection nozzle mounting device can be provided at lower cost.

Further, in the fuel injection nozzle mounting device according to the third aspect, the locking claw of the holding piece is locked to the edge of the notch hole portion of the peripheral flange of the connector.
The fuel injection nozzle can be held at a correct position without being loosened by inexpensive means.

[Brief description of the drawings]

FIG. 1 is a front view showing a mounted state of a fuel injection nozzle and a mounting device of the present invention.

FIG. 2 is a side view showing a mounted state of the fuel injection nozzle and the mounting device of the present invention.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a longitudinal sectional view of one embodiment of the connector.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is an enlarged view of a chevron.

FIG. 7 is a side view of one embodiment of a holder.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is an enlarged view of a locking claw of the holder of FIG. 7;

FIG. 10 is a plan view of a modified embodiment of the connector.

FIG. 11 is a side view of a modified embodiment of the holder.

FIG. 12 is a front view showing another embodiment in which the fuel injection nozzle and the holder of the mounting device are integrated.

FIG. 13 is a side view of the embodiment in which the fuel injection nozzle and the holder of the mounting device are integrated.

FIG. 14 is a plan view of FIG. 13;

FIG. 15 is a partial longitudinal sectional view of the internal combustion engine.

FIG. 16 is an explanatory diagram showing a state in which a fuel injection nozzle is inserted into a connector attached to a delivery pipe.

FIG. 17 is a bottom view of FIG. 16 with a connector attached to the delivery pipe.

FIG. 18 is a vertical sectional view taken along the line AA of FIG. 17 showing a state in which a conventional connector is mounted on the delivery pipe.

FIG. 19 is a longitudinal sectional view of a conventional connector.

FIG. 20 is a plan view of FIG. 19;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Internal combustion engine 9 Fuel injection nozzle 11 Delivery pipe 20 Mounting device 21 Connector 22 Holder 27 Notch recessed part 28 Engagement receiving part (angle-shaped convex part) 31 Locking claw 37 Notch hole part 39 Holder

Claims (3)

[Claims] 1. A cylindrical body having an insertion portion for a fuel injection nozzle at one end, and a plurality of engagement receiving portions spaced apart in a circumferential direction on a surface of a peripheral flange formed at the one end. The formed connector and a plurality of holding pieces projecting from the base mounted on the fuel injection nozzle in parallel to the axis of the base are formed, and the front end of the holding piece can be engaged with the engagement receiving portion of the connector. A holder having a locking claw, wherein the engaging claw of the holder is detachably engaged with the engagement receiving portion on the surface of the peripheral flange. . 2. A fuel injection nozzle having a cylindrical main body having an insertion portion at one end, and a plurality of engagement receiving portions formed at intervals in a circumferential direction on a surface of a peripheral flange formed at the one end portion. And a plurality of holding pieces protruding from the fuel injection nozzle in parallel to the axis thereof, and a locking claw which can be locked to the engagement receiving portion of the connector is formed at the tip of the holding piece. A fuel injection nozzle mounting device, comprising: a holder; and an engaging claw of the holder is detachably engaged with the engagement receiving portion on a surface of the peripheral flange. 3. A connector having a cylindrical main body having an insertion portion for a fuel injection nozzle at one end, a notch hole formed at a peripheral flange at an end in a peripheral flange formed at the one end, and a fuel cell. A plurality of clamping pieces projecting from the base mounted on the injection nozzle in parallel with the axis of the fuel injection nozzle, and a holder having a locking claw formed at the tip of the clamping piece;
The fuel injection nozzle mounting device wherein the holding pieces are respectively inserted into the notch holes, and the locking claws of the holding pieces are engaged with the edges of the notch holes to lock the holder to the connector.