JPS59168224A - Injection quantity controlling apparatus for distributor type fuel injection pump - Google Patents

Abstract

PURPOSE:To facilitate assembling of a fuel injection pump to a vehicle, by connecting a spill ring serving as an injection quantity control member to a governor lever at its side portion or at its lower portion, and thereby reducing the height of the fuel injection pump. CONSTITUTION:A flyweight holder 21 having a gear portion held in mesh with a large gear 24 on a driving shaft 23 is fitted on a governor shaft 22 so that a governor sleeve 27 can be pushed rightward via a thrust washer 26 through the outward displacement of a flyweight 25 in a holder 21 that is caused by the centrifugal force. At the time of starting an engine, a spill ring 4 is moved to a start position by forcing a control lever 1 onto the governor sleeve 27 by a start spring 29 and turning the control lever 1 leftward around pins 16, 17. Further, the control lever 1 and the spill ring 4 are connected together by a connecting member 5 by the side of the driving shaft 23 to reduce the height of a fuel injection pump.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection amount adjusting device for a distributed fuel injection pump used for internal combustion engines, particularly diesel engines.

In a conventional distribution type fuel injection pump injection amount adjustment device, as shown in Fig. 1, a cabana lever consisting of a control lever 1, (1) tensilon lever 2, and a guide lever 3 is connected to the spill ring 4 in a vertical direction. They were connected by a connecting member 5 at the top in the direction. Therefore, the distance from the highest point of the cabana lever to the lowest point of the spill ring 4 becomes long, and the pump itself also becomes long in the vertical direction, which hinders miniaturization of the pump.

Therefore, in view of the above problems, the present invention aims to shorten the distance from the highest point of the cabana lever to the lowest point of the spill ring 4, thereby lowering the height of the pump.

this. In order to achieve the purpose, in the present invention, the cabana lever and the spill ring 4 are connected at the side or lower part of the spill ring 4.

Hereinafter, a first embodiment of the present invention will be described based on the drawings.

FIG. 2 is a longitudinal cross-sectional view of the first embodiment, FIG. 3 is a cross-sectional view, and FIG. 4 is a partial view. A drive shaft 23 that rotates under the driving force of an automobile engine (not shown)
(2) A flyweight holder 21 having a gear portion is disposed on the governor shaft 22 so as to mesh with the large gear 24. A flyweight 25 is disposed inside the flyweight holder 21, and when this flyweight 25 receives a force in the centrifugal direction due to centrifugal force, the flyweight 25 moves through the thrust washer 26 to the governor sleeve 27 due to the lever principle.
is pushed out to the right in Figure 2. The governor lever, which is an injection amount control member, is control lever 1 and tensilon lever 2.
, a guide lever 3, a control lever 1
The tensilon lever 2 is fixed on the guide lever 3 above the axis of the drive shaft 23 by pins 16 and 17, and rotates about the pin 16, 17 as a fulcrum. The control lever 1 and the spill ring 4 are connected by a connecting member 5 at a side portion of the drive shaft 23. On the other hand, the guide lever 3 is attached to the bolt 18.1 at the point where the horizontal plane containing the axis of the drive shaft 23 and the pump housing 20 intersect
9 is fixed to the pump housing 20. The full load stopper 28 is brought into contact with the upper end of the guide lever 3 in FIG.
When the full load stopper 28 is screwed in, the upper end of the guide lever 3 in FIG. 2 receives a force in the direction of the flyweight 25 and rotates to the left in FIG. 2 about the bolts 18 and 19. The bins 16 and 17 and the spill ring 4 then move to the left in FIG. The start spring 29 is a weak leaf spring that is disposed between the control lever 1 and the tension lever 2.
Press it against the governor sleep 27. Then, the control lever 1 is rotated to the left in FIG. 2 about the bins 16 and 17 to move the spill ring 4 to the start position.

A control spring 30 is disposed between a spring seat 31 provided above the tensilon lever 2 in FIG. 2 and an adjusting lever 32. A damper spring 33 is installed between the spring seat 31 and the Tensilon lever 12, and an idle spring 34 is installed above the control lever 11.

(4) Next, the operation of this embodiment will be explained. This embodiment uses an inner cam type to regulate overflow, and the injection amount to be supplied to the diesel engine is controlled by moving the spill ring 4 with a cabana lever. When the spill ring 4 moves, the pumping period from the start of fuel pumping to the end of the pumping path changes. In other words, by moving the lower end side (left side in FIG. 2) of the Hesbill ring 4 of the fuel distribution rotating member 50 that is integrated with the drive shaft 23, the spill port opens more quickly and reverse pressure feeding ends more quickly. On the other hand, if it is moved toward the upper end (to the right in FIG. 2), the opening of the spill port will be delayed, and a large amount of fuel will be pumped during that time. In this way, the amount of fuel injection is controlled by moving the spill ring 4 in a direction that opens it quickly with respect to the spill port of the rotating member 50 for fuel distribution, or in a direction that does not open it forever. Note that this also applies to the face cam type.

When the accelerator pedal is depressed when the engine is started, and the adjusting lever 32 is suddenly moved in the direction of full load (5) (direction of arrow A in Fig. 4), the tension lever 2 is moved around the pin 16.17 as a fulcrum. , second
Rotate to the left in the figure. Since the centrifugal force of the flyweight 25 at the time of starting is very small, the start spring 2 with a weak tension is used.
9 presses the control lever 1 against the cabana sleeve 27, and the flyweight 25 is completely closed.

At this time, the upper part of the control lever 1 moves to the left and the lower part moves to the right in FIG. Move up to.

When the accelerator pedal is released after starting the engine, the adjusting lever 32 is returned to the idle position.

At this time, the tension of the control spring 30 becomes almost zero. Therefore, the flyweights 25 expand outward even at low speed rotation, and the cabana sleep 27 compresses the idle spring 34 and damper spring 33.

The control lever 1 rotates the cloth in FIG. 2 as the bin 16, 17 + shaft (6), and puts the spill ring 4 in the idle position. In this way, when the centrifugal force of the flyweight 25 and the tension of the idle spring 34 and damper spring 33 are balanced, smooth idling rotation can be obtained.

Next, when the accelerator pedal is depressed and the adjusting lever 32 is moved in the fully open direction (in the direction of the arrow in FIG. 4), the tensile lever 2 rotates to the left about the pins 16 and 17. The control lever 1 is also pushed rightward in FIG. 2 by the cabana sleep 27 and comes into contact with the tension lever 2, so the spill ring 4 moves rightward in FIG.

Also, if the engine speed rises above the specified speed,
The centrifugal force of the flyweight 25 becomes greater than the tension of the control spring 30, and the control lever 1 and tensilon lever 2 rotate clockwise about the pins 16 and 17 as a unit. Therefore, the spill ring is moved to the left in Figure 2 to prevent engine overrun (7).

Next, a second embodiment of the present invention will be described. In the first embodiment described above, the control lever 1 and the spill ring 4
was connected to the side of spill ring 4, but No. 5.6
They may be connected at the lower part of the spill ring 4 as shown in the figure. The other configurations are the same as in the first embodiment. By doing so, the distance from the highest point of the governor lever to the lowest point of the spill ring 4 can be further shortened than in the first embodiment.

In the above embodiment, the control lever 1 and the spill ring 4 are connected at the side or lower part of the spill ring 4, but the control lever 1 and the spill ring 4 may be connected at a location from the side to the lower part.

As described above, by using the injection amount adjusting device of the distribution type fuel injection pump of the present invention, the distance from the highest point of the governor lever to the lowest point of the spill ring 4 can be shortened, and the distribution type fuel The height of the injection pump can be reduced. When this distribution type fuel injection pump is attached to a vehicle, (8) it may become one of the factors for lowering the height of the hood of the vehicle.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a conventional injection amount adjustment device, and Figure 2 is a diagram showing a conventional injection amount adjustment device.
A longitudinal sectional view of the embodiment; FIG. 3 is a transverse sectional view of the first embodiment;
FIG. 4 is a partial view of the first embodiment, FIGS. 1 and 6 show the second embodiment, FIG. 1...Control lever (injection amount control member). 2... Tensilon lever (lJf shot amount control member 3
... Guide lever (injection amount control member), 4 ... Spill ring (injection amount control member), 5 ... Connection member, 30
...Control spring, 32...Adjusting lever (external operating member). Representative Patent Attorney Takashi Okabe (9)

Claims (1)

[Claims] A device that connects an injection amount control member provided in a fuel injection pump for an internal combustion engine to an external operating member via a control spring, and adjusts the injection amount by operating the injection amount control member based on the operation of the external operating member. In the above, the injection amount control member is composed of a governor lever spill ring, and the spill ring is connected to the governor lever at a side portion thereof, a lower portion thereof, or an arbitrary location from the side portion to the lower portion. Features: Injection amount adjustment device for distribution type fuel injection pump.