JP2000145596A - Fuel injection valve in fuel injector for v-engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the manufacturing cost of V-engines by easing the installation of a plurality of fuel injection valves in intake pipes connecting to each cylinder. SOLUTION: A plurality of intake pipes 1A and 1B connecting to each cylinder of a V-engine are disposed to meet from the opposite sides of a vertical line A-A so that their fuel-injection-valve-point bearing holes 2A and 2C have a longitudinal axis B-B inclined against the vertical line A-A at an angle of X. Each fuel-injection-valve-point bearing hole 2A, 2C has at its opening end 2B, 2D a conical bearing hole 2E of an angle of Y, set equal to or larger than the angle X, in relation to the axis B-B. Fuel injection valves J1 and J2 have their back end Ja fitted in a single fuel distribution pipe 3 and their point Jb mounted with a conical seal ring 5 with an inclined surface 5A conforming to the conical bearing hole 2E. Moving the fuel distribution pipe 3 with the fuel injection valves J1 and J2 along the vertical line A-A down to the intake pipes 1A and 1B brings the points Jb of the fuel injection valves Jl and J2 in the respective fuel-injection-valve-point bearing holes 2A and 2C via the conical seal rings 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel pump for supplying fuel pressurized by a fuel pump to a fuel distribution pipe through a fuel injection valve attached to the fuel distribution pipe. The present invention relates to a fuel injection device that supplies fuel to an intake pipe connected to a cylinder, and particularly to a fuel injection valve mounting device in a V-type engine.

[0002]

2. Description of the Related Art Conventionally, in a fuel injection device, a fuel injection valve is mounted on an intake pipe or a throttle body as shown in FIGS. Reference numeral 20 denotes a throttle body through which an intake passage 21 penetrates.
One longitudinal axis is formed on the vertical line EE. The reference line 22 is assumed to be a vertical line EE. Reference numeral 22 denotes a fuel injection valve tip support hole, the longitudinal axis GG of which is the vertical line E-E.
-E is formed to intersect at an angle H. The opening end 22A of the fuel injection valve tip support hole 22 on the atmosphere side is provided.
A cylindrical support hole 22B having a diameter larger than that of the support hole 22 is connected to the support hole 22. The fuel injection valve tip support hole 22 and the cylindrical support hole 22B are both cylindrical and coaxial with the longitudinal axis GG. It is formed. A ring-shaped seal ring 23 made of an elastic material is disposed in the cylindrical support hole 22B. J is a fuel injection valve, the rear end of which is inserted and supported in a fuel distribution pipe F via a cushion member 24, and is connected to an internal fuel flow path Fa. The fuel injection valve J in which the fuel distribution pipe F is mounted at the rear end described above has its longitudinal axis KK disposed on the longitudinal axis GG of the fuel injection valve tip support hole 22, and is in this state. At the fuel injection valve J
Is inserted into the fuel injection valve support hole 22 along the longitudinal axis GG, and after the insertion, the fuel distribution pipe F is fixed to the throttle body 20 by, for example, screws. According to the above, the fuel injection valve J is sandwiched and fixed between the throttle body 20 and the fuel distribution pipe F at the front and rear ends thereof, and the cylindrical portion near the front end is elastically supported by the ring-shaped seal ring 23. Is done. That is, the longitudinal axis KK of the fuel injection valve J and the longitudinal axis GG of the fuel injection valve tip support hole 22 are arranged on the same line. The fuel injection valve J is sandwiched between the fuel distribution pipe F and the throttle body 20 and the rear end thereof has a cylindrical seal ring 2.
FIG. 4 shows a state in which the seal is elastically supported at 3.

[0003]

According to such a conventional fuel injection valve mounting apparatus, a plurality of intake passages 21 are arranged laterally and a longitudinal axis EE of each intake passage 21 is arranged like an in-line multi-cylinder engine. If the longitudinal axis GG of the fuel injection valve tip support hole 22 is directed in the same direction, it is effective in manufacturing. That is, the rear ends of the plurality of fuel injection valves J are inserted and arranged in a single fuel distribution pipe F, and the longitudinal axis KK of each fuel injection valve J and the longitudinal axis of each fuel injection valve tip support hole 22 are provided. GG are arranged on the same line, and in such a state, all the fuel injection valves J can be simultaneously inserted and arranged in all the fuel injection valve tip support holes 22 by moving all the fuel injection valves J along the longitudinal axis. It is.

However, it is not preferable in terms of manufacturing to use the conventional fuel injector mounting device as a fuel injector mounting device for a V-type engine. That is, in a V-type engine, as will be described later, the intake pipes connected to the respective cylinders are arranged so as to cross each other, and the longitudinal axis of the fuel injection valve tip support hole formed in one intake pipe and the other intake pipe Are not arranged in the same direction as the longitudinal axis of the fuel injection valve tip support hole, but are arranged so as to intersect each other. According to the above, the insertion direction of the fuel injection valve to be inserted into each of the fuel injection valve tip support holes cannot be inserted from the Y direction, and the operation of inserting the fuel injection valve into the fuel injection valve tip support hole is extremely difficult. It will be difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is intended for a V-type engine in which each fuel injection valve can be very easily mounted in a fuel injection valve tip support hole of each intake pipe. An object of the present invention is to provide a fuel injection valve mounting device in a fuel injection device.

[0006]

According to the present invention, there is provided a fuel injection valve mounting apparatus for a fuel injection device for a V-type engine according to the present invention, wherein a plurality of intake pipes connected to respective cylinders constituting the V-type engine are provided. On both sides of the vertical line A-A and the vertical line A-
A, the longitudinal axis BB of the fuel injection valve tip support hole formed in each intake pipe is arranged so as to intersect with A.
A cone support which is formed at an angle of X degrees with respect to A and is inclined at an angle of Y degrees or more with respect to the axis BB at an opening end on the atmosphere side of the fuel injector front end support hole. A hole is provided, and at the tip of the fuel injection valve, a conical seal ring whose outer surface has an inclined surface along the conical support hole is arranged, and the rear end is inserted and arranged in a single fuel distribution pipe. By moving the fuel injection valve along the vertical line AA, the tip is inserted into the fuel injection valve tip support hole via a conical seal ring, and the fuel injection valve is moved between the fuel distribution pipe and the intake pipe. And the fuel injection valve is disposed along the longitudinal axis BB of the fuel injection valve tip support hole.

[0007]

According to the above, the rear end of each fuel injection valve toward each intake pipe is inserted and arranged in a single fuel distribution pipe, and the fuel injection valve in this state is moved along the vertical line AA. By moving the fuel injection valve toward the intake pipe, each fuel injection valve can be simultaneously inserted and disposed in each fuel injection valve tip support hole formed in each intake pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fuel injection valve mounting device in a fuel injection device for a V-type engine according to the present invention will be described below with reference to FIGS. Reference numeral 1 denotes an intake pipe connected to each cylinder of the V-type engine. A first intake pipe 1A and a second intake pipe 1B are symmetrically arranged on both sides of a vertical line AA, and the intake pipes 1A and 1B are vertically arranged. It is arranged crossing the line A-A. The first intake pipe 1A is a first cylinder W constituting a V-type engine.
1 and the second intake pipe 1B is connected to the second cylinder.

[0009] A fuel injection valve tip support hole 2 is formed in the intake pipe 1. A first fuel injection valve tip support hole 2A (hereinafter simply referred to as a first support hole 2A) is formed in the first intake pipe 1A, and a longitudinal axis B1 of the first support hole 2A is formed.
-B1 is inclined X degrees with respect to the vertical line AA. The upper end 2B of the first support hole 2A opens to the atmosphere, and the lower end opens to the inside of the first intake pipe 1A. A second fuel injection valve tip support hole 2C (hereinafter simply referred to as a second support hole 2C) is formed in the second intake pipe 1B, and a longitudinal axis B2-- B2 is X with respect to the vertical line AA.
Incline. The open end 2D above the second support hole 2C opens to the atmosphere, and the lower end opens into the second intake pipe 1B.
That is, the first support hole 2A and the second support hole 2C are symmetrical with respect to the vertical line AA and are formed to be inclined by X degrees.

J is a first intake pipe 1A, a second intake pipe 1B
The first fuel injection valve J1 is directed to the first intake pipe 1A, and the second fuel injection valve J2 is directed to the second intake pipe 1B. The first fuel injection valve J1 is disposed parallel to the longitudinal axis B1-B1 of the first support hole 2A, and the rear end Ja is inserted and disposed in the single fuel distribution pipe 3 via the cushion member 4, It is communicated with the fuel flow path 3A in the fuel distribution pipe 3. In this fuel passage 3A,
Fuel whose pressure is increased by a fuel pump (not shown) is supplied. The second fuel injection valve J2 is disposed parallel to the longitudinal axis B2-B2 of the second support hole 2C, and has a rear end Ja.
Are inserted and arranged in a single fuel distribution pipe 3 via a cushion member 4, and are connected to a fuel flow path 3 </ b> A in the fuel distribution pipe 3. According to the above, the first fuel injection valve J1 and the second fuel injection valve J2 are attached to the single fuel distribution pipe 3,
As described above, the first fuel injection valve J1 is disposed in parallel with the longitudinal axis B1-B1 of the first support hole 2A, and the second fuel injection valve J2 is disposed in parallel with the longitudinal axis B2- of the second support hole 2B. It is arranged in parallel with B2.

Then, the opening end 2B of the first support hole 2A
Is formed with a conical support hole 2E. This conical support hole 2E
Is an inclined surface inclined by Y degrees with respect to the longitudinal axis B1-B1 of the first support hole 2A, and the angle Y degrees is the angle X
Make an angle greater than degrees. The angle Y degrees and the angle X degrees may be equal. (The angle X degrees is the longitudinal axis B of the first support hole 2A.
The angle at which 1-B1 intersects the vertical line AA. )or,
A conical support hole 2E similar to the above is formed at the open end 2D of the second support hole 2C. The conical support hole 2E is an inclined surface that is inclined by Y degrees with respect to the longitudinal axis B2-B2 of the second support hole 2C, and the angle Y is equal to or larger than the angle X.

Reference numeral 5 denotes a ring-shaped conical seal ring mounted on the outer periphery of the cylindrical end Jb of the fuel injection valve J, and its outer surface forms an inclined surface 5A along the inclined portion of the conical support hole 2E. It is formed of an elastic material such as a rubber material. When the first fuel injection valve J1 and the second fuel injection valve J2 are mounted on the fuel distribution pipe 3, the conical seal ring 5 is connected to the fuel injection valves J1 and J2.
2 is attached to the outer periphery of the tip Jb. This state is shown in FIG.

The fuel distribution pipe 3, the fuel injection valve J, and the intake pipe 1 are assembled as follows. First, the rear end Ja of the first fuel injection valve J1 and the second fuel injection valve J2 is attached to the fuel distribution pipe 3 via the cushion member 4. At this time, the first fuel injection valve J1 is connected to the first
Are arranged in parallel with the longitudinal axis B1-B1 of the support hole 2A. Further, the second fuel injection valve J2 is disposed in parallel with the longitudinal axis B2-B2 of the second support hole 2C. Further, a conical seal ring 5 is attached to the outer periphery of the tip Jb of each of the fuel injection valves J1 and J2. As described above, the first and second fuel distribution pipes 3
The state in which the second fuel injection valves J1 and J2 are mounted is shown in FIG. 1, and in this state, the second fuel injection valves J1 and J2 are arranged away from the intake pipe 1.

Second, as shown in FIG. 1, the fuel distribution pipe 3 having the fuel injection valves J1 and J2 is disposed on the vertical line AA. Moved down along -A. According to the above, the conical seal ring 5 of the first fuel injection valve J1 is inserted and arranged in the conical support hole 2E of the first support hole 2A, and the conical seal ring 5 of the second fuel injection valve J2 is The second support hole 2C is inserted into the conical support hole 2E and disposed. Then, in such a state, the fuel distribution pipe 3 is screwed and fixed to the intake pipe 1 via a stay or the like. (Stays and screws are not shown.) As described above, the fuel distribution pipe 3 including the fuel injection valves J1 and J2 is moved downward along the vertical line A-A to thereby lower the fuel injection valves J1 and J2. Connect the tip Jb to each support hole 2
A and 2C can be arranged in (1) a longitudinal axis B1-B1 of the first support hole 2A,
Of the support hole 2C of the above-mentioned is arranged symmetrically with respect to the vertical line AA and crossed at X degrees. (2) A conical support hole 2E having an angle Y or more than X degrees is formed in the openings 2B and 2D of the support holes 2A and 2C. (3) The first fuel injection valve J1 is disposed parallel to the longitudinal axis B1-B1 of the first support hole 2A, and the conical seal ring 5 having the inclined surface 5A along the conical support hole 2E at the end Jb thereof. That it was placed. (4) The second fuel injection valve J2 is disposed parallel to the longitudinal axis B2-B2 of the second support hole 2C, and the conical seal ring 5 having the inclined surface 5A along the conical support hole 2E at the tip Jb thereof is provided. That it was placed. It is due to. FIG. 2 shows a state in which the fuel distribution pipe 3 including the fuel injection valves J1 and J2 is attached to the intake pipe 1. In this embodiment, the fuel injection valves J1, J
2 can be arranged on the same cross section, but can be carried out even on different cross sections. Also, the first and second support holes 2
A, the vertical line A of the longitudinal axis B1-B1, B2-B2 of 2C
The present invention can be implemented even if the crossing angle X degrees with respect to -A is different from each other. Further, the number of fuel injection valves J is not limited to two in this embodiment.

[0015]

As described above, according to the fuel injector mounting apparatus of the present invention, the plurality of intake pipes connected to the respective cylinders constituting the V-type engine are located on both sides of the vertical line A-A, and The longitudinal axis BB of the fuel injection valve tip support hole formed in each intake pipe is disposed so as to intersect with AA and is inclined at X degrees with respect to the vertical line AA. At the open end of the fuel injection valve tip support hole on the atmosphere side, a conical support hole that is inclined at an angle Y or more than the X degree with respect to the axis BB is provided at the tip of the fuel injection valve. Since the outer side surface is provided with the conical seal ring having the inclined surface along the conical support hole, the fuel distribution pipe having the plurality of fuel injection valves can be simply moved toward the intake pipe along the vertical line A-A. The fuel injection valve can be installed very easily in each support hole of the intake pipe connected to the V-type engine. It is effective on the production.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of an embodiment of a fuel injection valve mounting device in a fuel injection device for a V-type engine according to the present invention, showing a state in which each fuel injection valve is mounted on a fuel distribution pipe.

FIG. 2 is a longitudinal sectional view of a main part showing a state in which a fuel injection valve including a fuel distribution pipe in FIG. 1 is attached to an intake pipe.

FIG. 3 is a longitudinal sectional view of a main part showing a state in which a fuel injection valve is mounted on a fuel distribution pipe in a conventional fuel injection valve mounting device.

FIG. 4 is a longitudinal sectional view of a main part showing a state in which a fuel injection valve including a fuel distribution pipe in FIG. 3 is attached to an intake pipe;

[Explanation of symbols]

 1A, 1B Intake pipe 2A, 2C Fuel injection valve tip support hole (support hole) 2B, 2D Open end 2E Conical support hole 3 Fuel distribution pipe 5 Conical seal ring 5A Inclined surface J1, J2 Fuel injection valve

Claims (1)

[Claims] 1. A plurality of intake pipes 1A and 1B connected to respective cylinders constituting a V-type engine are disposed on both sides of a vertical line AA and intersect with the vertical line AA. Intake pipe 1
A, 2B, 2A, 2C
Of the fuel injection valve tip support holes 2A, 2C are provided at the open ends 2B, 2D on the atmosphere side with respect to the vertical line AA. Conical support hole 2 inclined at an angle Y or more than X degrees with respect to BB
E, a conical seal ring 5 having an inclined surface 5A having an outer surface along the conical support hole 2E is disposed at the tip Jb of the fuel injection valve J, and the rear end Ja is inserted and disposed in the single fuel distribution pipe 3. The fuel injection valves J1 and J2 are connected to a vertical line A-A.
, The tip Jb of the fuel injection valve is inserted into the fuel injection valve tip support hole 2E via the conical seal ring 5 and the fuel injection valves J1 and J2 are connected to the fuel distribution pipe 3.
Between the fuel injection valves J1,
J2 is the longitudinal axis B of the fuel injection valve tip support holes 2A and 2C.
A fuel injection valve mounting device for a V-type engine fuel injection device arranged along B.