JP3747272B2 - Mounting device for fuel injection valve in fuel injection device for V-type engine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention supplies fuel boosted by a fuel pump to a fuel distribution pipe, and directs the pressurized fuel in the fuel distribution pipe to an intake pipe connected to the cylinder via a fuel injection valve attached to the fuel distribution pipe. In particular, the present invention relates to a fuel injection valve mounting device in a V-type engine.
[0002]
[Prior art]
Conventionally, in a fuel injection device, when a fuel injection valve is attached to an intake pipe or a throttle body, it is performed as shown in FIGS.
Reference numeral 20 denotes a throttle body through which an intake passage 21 passes, and the longitudinal axis of the intake passage 21 is formed on a vertical line EE. 22 (assuming the reference line is a vertical line EE) 22 is a fuel injection valve tip support hole, and its longitudinal axis GG intersects the vertical line EE with an angle H. .
A cylindrical support hole 22B having a diameter larger than that of the support hole 22 is connected to the open end 22A on the atmosphere side of the fuel injection valve front end support hole 22, and the fuel injection valve front end support hole 22 and the cylinder support are supported. The holes 22B are both cylindrical and are formed concentrically with the longitudinal axis GG.
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 the fuel distribution pipe F via the cushion member 24 and communicated with the internal fuel flow path Fa.
The fuel injection valve J having the fuel distribution pipe F attached to the rear end as described above has its longitudinal axis KK disposed on the longitudinal axis GG of the fuel injection valve front end support hole 22 and is in this state. The fuel injection valve J is inserted into the fuel injection valve support hole 22 along the longitudinal axis GG. After the insertion, the fuel distribution pipe F is fixed to the throttle body 20 with screws or the like.
According to the above, the fuel injection valve J is sandwiched and fixed by the throttle body 20 and the fuel distribution pipe F at the front end and the rear end, 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.
A state in which the fuel injection valve J is sandwiched between the fuel distribution pipe F and the throttle body 20 and the rear end thereof is elastically supported by the cylindrical seal ring 23 is shown in FIG.
[0003]
[Problems to be solved by the invention]
According to such a conventional fuel injection valve mounting device, a plurality of intake passages 21 are arranged on the side as in an in-line multi-cylinder engine, and the longitudinal axis EE of each intake passage 21 and the front end support hole 22 of the fuel injection valve. When the longitudinal axis GG is 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 front end support hole 22 are arranged. GG are arranged on the same line, and in this state, all the fuel injection valves J can be inserted and arranged in all the fuel injection valve front end support holes 22 simultaneously by moving along the longitudinal axis. It is.
[0004]
However, the use of the conventional fuel injection valve mounting device as a fuel injection valve mounting device for a V-type engine is not preferable in manufacturing.
That is, in the V-type engine, as will be described later, the intake pipes connected to the respective cylinders are arranged so as to intersect right and left, 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 formed in the above, but are arranged so as to cross each other.
According to the above, the insertion direction of the fuel injection valve to be inserted into each fuel injection valve tip support hole cannot be inserted from the Y direction, and the insertion operation of the fuel injection valve into the fuel injection valve tip support hole is extremely difficult. It becomes difficult.
[0005]
The present invention has been made in view of the above problems, and in a V-type engine, a fuel injection device for a V-type engine that can very easily mount each fuel injection valve to a fuel injection valve tip support hole of each intake pipe. It is an object of the present invention to provide a fuel injection valve mounting apparatus.
[0006]
[Means for achieving the object]
In order to achieve the above object, the fuel injection valve mounting apparatus in the V-type engine fuel injection apparatus according to the present invention has a plurality of intake pipes connected to each cylinder constituting the V-type engine on both sides of the vertical line AA. The longitudinal axis BB of the fuel injection valve front end support hole formed in each intake pipe and intersecting the vertical line AA is inclined by X degrees with respect to the vertical line AA. And drilled
A conical support hole inclined at an angle Y degree equal to or greater than X degrees with respect to the axial line BB is provided at an opening end portion on the atmosphere side of the fuel injection valve tip support hole,
A conical seal ring having an inclined surface along the conical support hole is disposed on the tip of the fuel injection valve,
By moving the fuel injection valve whose rear end is inserted and arranged in a single fuel distribution pipe along the vertical line AA, the tip thereof is inserted into each fuel injection valve tip support hole via a conical seal ring. Each fuel injection valve is inserted and disposed 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]
[Action]
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 placed along the vertical line AA. By moving the fuel injection valve toward each other, the fuel injection valves can be inserted and arranged in the front end support holes of the fuel injection valves that are formed in the intake pipes at the same time.
[0008]
【Example】
An embodiment of a fuel injection valve mounting device in a V-type engine fuel injection device 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 a 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 AA.
The first intake pipe 1A is connected to the first cylinder W1 constituting the V-type engine, 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.
The first intake pipe 1A is provided with a first fuel injection valve tip support hole 2A (hereinafter simply referred to as a first support hole 2A), and the longitudinal axis B1- of the first support hole 2A. B1 is inclined by X degrees with respect to the vertical line AA. The opening end 2B above the first support hole 2A opens to the atmosphere, and the lower end opens into the first intake pipe 1A.
The second intake pipe 1B is provided with a second fuel injection valve front end support hole 2C (hereinafter simply referred to as a second support hole 2C), and the longitudinal axis B2- of the second support hole 2C. B2 is inclined by X degrees with respect to the vertical line AA. The opening end 2D above the second support hole 2C opens to the atmosphere, and the lower end opens into the second intake pipe 1B.
In other words, the first support hole 2A and the second support hole 2C are formed in a symmetrical position with respect to the vertical line AA and inclined by X degrees.
[0010]
J is a fuel injection valve disposed toward the first intake pipe 1A and the second intake pipe 1B. The first fuel injection valve J1 faces the first intake pipe 1A and the second fuel injection valve. J2 goes 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 communicates with the fuel flow path 3A in the fuel distribution pipe 3.
Fuel that has been pressurized by a fuel pump (not shown) is supplied to the fuel flow path 3A.
The second fuel injection valve J2 is disposed in parallel with the longitudinal axis B2-B2 of the second support hole 2C, and the rear end Ja is inserted and disposed in the single fuel distribution pipe 3 via the cushion member 4, It communicates with the fuel flow path 3A 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, and as described above, the first fuel injection valve J1 is the first fuel injection valve J1. The second fuel injection valve J2 is disposed in parallel with the longitudinal axis B2-B2 of the second support hole 2B, and is disposed in parallel with the longitudinal axis B1-B1 of the support hole 2A.
[0011]
A conical support hole 2E is formed at the opening end 2B of the first support hole 2A. The 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 greater than the angle X degrees.
The angle Y degree and the angle X degree may be equal.
(An angle X degree is an angle at which the longitudinal axis B1-B1 of the first support hole 2A intersects the vertical line AA.)
A conical support hole 2E similar to the above is formed at the opening end 2D of the second support hole 2C. The conical support hole 2E is an inclined surface inclined by Y degrees with respect to the longitudinal axis B2-B2 of the second support hole 2C, and the angle Y degrees is greater than the angle X degrees.
[0012]
5 is a conical seal ring having a ring shape attached to the outer periphery of the cylindrical tip 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. For example, it is made of an elastic material such as a rubber material.
The conical seal ring 5 is attached to the outer periphery of the tip Jb of each fuel injection valve J1, J2 in a state where the first fuel injection valve J1 and the second fuel injection valve J2 are attached to the fuel distribution pipe 3. Is done.
This state is shown in FIG.
[0013]
The fuel distribution pipe 3, the fuel injection valve J, and the intake pipe 1 are assembled as follows. First, the rear ends Ja of the first fuel injection valve J1 and the second fuel injection valve J2 are attached to the fuel distribution pipe 3 via the cushion member 4.
At this time, the first fuel injection valve J1 is arranged in parallel with the longitudinal axis B1-B1 of the first support hole 2A of the intake pipe 1.
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 fuel injection valve J1, J2.
As described above, the state in which the first and second fuel injection valves J1, J2 are attached to the fuel distribution pipe 3 is shown in FIG. 1, and in this state, the fuel distribution pipe 3 is disposed away from the intake pipe 1.
[0014]
Second, as shown in FIG. 1, the fuel distribution pipe 3 provided with the fuel injection valves J1 and J2 is arranged on the vertical line AA, and from this state, the fuel distribution pipe 3 is moved to the vertical line AA. Along the line.
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 first one. The second support hole 2C is inserted into the conical support hole 2E. In this 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, by moving the fuel distribution pipe 3 including the fuel injection valves J1 and J2 downward along the vertical line AA, the front ends Jb of the fuel injection valves J1 and J2 are moved to the support holes 2A and 2C. Can be placed inside
(1) The longitudinal axis B1-B1 of the first support hole 2A and the longitudinal axis B2-B2 of the second support hole 2C are arranged symmetrically with respect to the vertical line AA and at X degrees. .
(2) A conical support hole 2E having an angle Y degree of X degrees or more is formed in the openings 2B and 2D of the support holes 2A and 2C.
(3) The first fuel injection valve J1 is arranged in parallel to the longitudinal axis B1-B1 of the first support hole 2A, and the conical seal ring 5 having an inclined surface 5A along the conical support hole 2E at the tip Jb. Arranged.
(4) The second fuel injection valve J2 is arranged in parallel to the longitudinal axis B2-B2 of the second support hole 2C, and the conical seal ring 5 having an inclined surface 5A along the conical support hole 2E at the tip Jb. Arranged.
Is due to.
A state in which the fuel distribution pipe 3 including the fuel injection valves J1 and J2 is attached to the intake pipe 1 is shown in FIG.
Although the fuel injection valves J1 and J2 are arranged on the same cross section, this embodiment can be implemented even on different cross sections.
Further, the first and second support holes 2A and 2C can be implemented even when the crossing angles X degrees of the longitudinal axes B1-B1 and B2-B2 with respect to the vertical line AA are different from each other.
Further, the number of fuel injection valves J is not limited to two in this embodiment.
[0015]
【The invention's effect】
As described above, according to the fuel injection valve mounting device of the present invention, the plurality of intake pipes connected to the cylinders constituting the V-type engine are on both sides of the vertical line AA and with respect to the vertical line AA. The longitudinal axis BB of the fuel injection valve tip support hole formed in each intake pipe is formed so as to be inclined by X degrees with respect to the vertical line AA,
A conical support hole inclined at an angle Y degree equal to or greater than X degrees with respect to the axial line BB is provided at an opening end portion on the atmosphere side of the fuel injection valve tip support hole,
Since a conical seal ring having an inclined surface along the conical support hole is disposed at the tip of the fuel injection valve,
If a fuel distribution pipe having a plurality of fuel injection valves is simply moved toward the intake pipe along the vertical line AA, the fuel injection valves can be attached to the support holes of the intake pipe connected to the V-type engine very easily. It is possible to manufacture and is effective.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part showing 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;
2 is a longitudinal sectional view of a main part showing a state where 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.
4 is a longitudinal sectional view of a main part showing a state in which a fuel injection valve including a fuel distribution pipe is attached to an intake pipe in FIG. 3;
[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)

A plurality of intake pipes 1A, 1B connected to each cylinder constituting the V-type engine are arranged on both sides of the vertical line AA and intersecting the vertical line AA, and each intake pipe 1A, 1B is arranged. The longitudinal axis BB of the fuel injection valve tip support holes 2A, 2C formed in the cylinder is inclined by X degrees with respect to the vertical line AA,
A conical support hole 2E that is inclined at an angle Y degree of X degrees or more with respect to the axial center line BB is provided at the opening end parts 2B, 2D on the atmosphere side of the fuel injection valve tip support holes 2A, 2C,
A conical seal ring 5 having an inclined surface 5A whose outer surface is along the conical support hole 2E is disposed at the tip Jb of the fuel injection valve J,
By moving the fuel injection valves J1 and J2 whose rear end Ja is inserted into the single fuel distribution pipe 3 along the vertical line AA, the front end Jb is connected to each fuel via the conical seal ring 5. The fuel injection valves J1 and J2 are interposed between the fuel distribution pipe 3 and the intake pipe 1 while being inserted into the injection valve front end support hole 2E, and the fuel injection valves J1 and J2 are held in the fuel injection valve front end support hole 2A. , 2C. A fuel injection valve mounting device in a fuel injection device for a V-type engine arranged along the longitudinal axis BB of 2C.

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