JP2559514Y2 - Control lever 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 control lever device provided in a fuel supply control mechanism for a diesel engine.

[0002]

2. Description of the Related Art Generally, in a diesel engine, an injection pump for supplying fuel to each cylinder is appropriately controlled by a control lever device in order to control the output by adjusting the amount of fuel injection. The injection amount changes in accordance with the angular phase.

As shown in FIG. 3, conventionally, a control lever 1 of this type has a MIN output (idling state) position (P) on a control shaft 2 of an injection pump (not shown).
And a MAX output position (Q), and a spring 4 for urging the idle end is attached to the rotation end 3 of the motor. An adjustment bolt 5 is provided in the vicinity of the control lever 1, and the rotation range thereof is adjusted by contacting the side of the control lever 1 so that desired output control can be performed.

[0004]

In the above-mentioned conventional control lever device, however, the injection amount with respect to the angular phase of the control lever 1 is not necessarily constant for each product because the components of the injection pump have variations in processing accuracy and the like. Not with a certain variation. In addition, when this is combined with the engine body, even if the injection amount is the same, the engine's friction characteristics also vary due to variations in the processing accuracy of the components of the engine body, so the output for each engine is not necessarily Not constant. Therefore, in an actual engine, as a result of the addition of these two variations, the engine output with respect to the control phase angle of the control lever 1 also has a large variation.

Conversely, to guarantee the MIN output and the MAX output as the engine output range, the control phase of the control lever 1 varies from engine to engine. Therefore, for example, when used in an automobile, it means that the idle set angle and pedal stroke of the accelerator pedal vary from vehicle to vehicle, and in some cases, the driving operability is deteriorated. Complex adjustment work was required.

[0006] More recently, various complex control systems have been developed and the number of cases in which the engine output control amount is used as a control factor has been increasing. In such a case, however, the control lever 1 serving as a signal source is also used. The initial phase and stroke are not constant, which is a major obstacle in configuring a control system.

In view of the above circumstances, the present invention has been devised to provide a control lever device that does not vary in the rotation angle phase of the control lever corresponding to the set control value.

[0008]

According to the present invention, there is provided a control lever device for rotating a control shaft between a first output position and a second output position by a control lever rotating in a predetermined range.
A direct coupling lever attached to the control shaft, an intermediate lever pivotally supported by the control shaft and engaged to adjust the rotational angle phase difference between the direct coupling lever, and the intermediate lever and the control lever, respectively. An elongate hole formed so as to substantially match when superimposed as the first output position and to intersect appropriately at the second output position, and to play in this elongate hole so as to be fixed to either the intermediate lever or the control lever. And a pin rod which fits and connects these levers.

[0009]

According to the above arrangement, when matching the output of the control shaft with the angular phase of the control lever, the rotation angle phase difference between the direct connection lever and the intermediate lever is adjusted, so that the control shaft at the first output position can be adjusted. The phase relationship with the control lever is determined. When the control lever comes to the second output position, the rotation is transmitted to the directly connected lever via the pin rod and the intermediate lever, and the control shaft is rotated. If there is a deviation between the output value and the set value at that time, by moving the pin rod along the elongated hole while keeping the control lever,
Rotate the intermediate lever by an appropriate amount. This rotation is transmitted to the directly connected lever, so that the deviation is eliminated. This movement of the pin rod does not affect the phase of the intermediate lever at the first output position and does not degrade the adjustment already made at the first output position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a control lever device according to the present invention, which is applied to a fuel supply control mechanism of a diesel engine. This control lever device includes a control lever 11 that rotates in a predetermined range.
Thus, the control shaft 12 of the fuel injection pump is configured to rotate between an idle position as a first output position and a maximum output position as a second output position, and is attached to the control shaft 12. Directly connected lever 13, an intermediate lever 14 coaxially with the directly connected lever 13 and pivotally supported by a control shaft 12, elongated holes 15 and 16 provided in the intermediate lever 14 and the control lever 11, respectively, Hole 15,1
6 is mainly constituted by a pin rod 17 which is loosely fitted to the control lever 6 and connects the intermediate lever 14 and the control lever 11.

The control lever 11 is formed of a substantially linear long plate having a slightly bent distal end portion 18 and a base end pivotally supported by a rotating shaft 19 provided in parallel with and separated from the control shaft 12 as appropriate. I have. And a fixed stopper 2 provided at an appropriate position.
The rotation range is restricted by abutting both sides by 0 and 21 respectively. That is,
The position in contact with one fixed stopper 20 is the idle position (P), and the position in contact with the other fixed stopper 21 is the maximum output (full) position (Q). The elongated hole 16 is formed at the distal end portion 18 along the refraction direction.

The direct connection lever 13 has one end fixed to the control shaft 12 and the other end mounted with a return spring 22 for urging the idler side. An adjuster bolt 23 that is in contact with one end of the intermediate lever 14 is attached to the direct connection lever 13. The adjuster bolt 23 is supported by a bracket 24 so as to protrude toward the idle side, and is formed so that the amount of protrusion at the tip thereof can be adjusted.
The rotation angle phase difference between the third lever 3 and the intermediate lever 14 can be determined.

The intermediate lever 14 is formed of an L-shaped plate bent at a substantially right angle, and the boss 2 fitted coaxially with the control shaft 12.
5 rotatably supported. The side opposite to the side in contact with the adjuster bolt 23 extends to the maximum output side, and the other end 26 has an elongated hole 15 formed in the longitudinal direction.

The intermediate lever 14 and the control lever 11 are formed and arranged such that when the levers 14 and 11 are at the idle position (P), the other end 26 and the tip 18 are overlapped over a considerable section. In this embodiment, the elongated holes 15 and 16 are formed to have the same length, and are arranged so that their directions are completely coincident. Therefore, at the maximum output position (Q), these slots 15 and 16 are
Due to the difference between the rotation trajectories 4 and 11, they intersect appropriately.

As shown in FIG. 2, the pin rod 17
At the center in the longitudinal direction, the intermediate lever 14 and the control lever 11
And a flange 27 interposed therebetween is formed.
Both ends 28 and 29 protruding from the flange are elongated holes 1 respectively.
6, 15 are inserted. A male screw is cut into the end portion 29 on the side of the intermediate lever 14, and a nut 30 screwed into the male screw is provided. That is, the nut 30
By tightening, the pin rod 17 can be fixed at an arbitrary position in the intermediate lever side elongated hole 15.
Further, the control lever side end 28 slides appropriately in the elongated hole 16 according to the rotation of the control lever 11, and the inserted state is maintained. The pin rod 17 may be formed so as to be fixed to the control lever 11 side.

Next, the operation of this embodiment will be described.

The direct connection lever 13 is connected to the return spring 2
2, the urging force is transmitted in the idle direction (clockwise direction in FIG. 1), and this urging force is transmitted to the intermediate lever 14 via the adjuster bolt 23. The transmitted bias is
Further, the control lever 11 acts in a direction for rotating the control lever 11 in the idle direction (clockwise direction in FIG. 1) via the pin rod 17 restrained in the transverse direction by the slots 15 and 16. At this time, the control lever 11 is
The rotation is stopped by contacting the zero position, and is stabilized at the idle position (P). The intermediate lever 14 is also held by the pin rod 17 and is stabilized at that position. And the long holes 15, 16
Since the pin rods 17 are completely coincident in this state, no matter where the pin rod 17 is located in
Does not change and its idle position is
Similarly to the above, it is uniquely determined by the fixed stopper 20.

When the engine is started in this state, if the generated output is lower than the target idle rotation, the adjuster bolt 23 is adjusted to increase the tip protrusion amount. Due to this increase, the direct connection lever 13 shifts in the injection amount increasing direction (counterclockwise in FIG. 1) with respect to the control lever 11 fixed at the idle position (P), and the generated output is increased to the target idle rotation. be able to.
Conversely, when the rotation is higher than the idle rotation, the amount of protrusion of the tip of the adjuster bolt 23 is reduced, so that the direct connection lever 13 moves the return spring 22 in the injection amount decreasing direction.
, The desired idle rotation is obtained.

Next, when the control lever 11 is rotated to a position (Q) where it comes into contact with the other fixed stopper 21, the other end 26 is pulled by the pin rod 15 and the intermediate lever 1 is pulled.
4 rotates around the control shaft 12 in the maximum output direction (counterclockwise direction in FIG. 1). Due to the rotation of the intermediate lever 14, the direct connection lever 13 is pushed through the adjuster bolt 23, and rotates in the injection amount increasing direction (counterclockwise in FIG. 1) against the return spring 22.

If the output at this time is lower than the target maximum output, the nut 30 is loosened while the control lever 11 is in the maximum output position (Q), and the pin rod 17 is moved to the length of the control lever 11. It is moved in the direction approaching the rotation shaft 19 in the hole 16. By this movement, the intermediate lever 14 further rotates in the maximum output direction (counterclockwise direction in the figure) as shown by the two-dot chain line in FIG. The output increases by rotating in the injection amount increasing direction. Therefore, if the pin rod 17 is fixed in position in the long hole 16 so that the output becomes the target maximum output,
At the maximum output position (Q) of the control lever 11 uniquely determined by the fixed stopper 20, a desired maximum output is reliably obtained.

After the pin rod 17 is relocated in this manner, even if the control lever 11 is returned to the idle position (P) determined by the one fixed stopper 20, the intermediate lever 14 is not affected by the position of the pin rod 17. Since the engine returns to the previously set idle position, the idle rotation at which the target value was obtained in the first adjustment is maintained as it is.

As described above, the directly connected lever 13 attached to the control shaft 12 and the control lever 11 pivotally supported by the rotating shaft 19 are connected by the pin rods 17 loosely fitted into the long holes 15 and 16 respectively. Adjuster bolt 2 for idle adjustment
3, the maximum output adjustment is performed by moving the pin rod 17 in the elongated hole 15 of the intermediate lever 14, and the output adjustment is performed by the control lever. 11 can be performed without changing the rotation range, and the maximum output adjustment can be performed independently without affecting the idle adjustment already performed. That is, the idle position (P) and the full position (P) defined by the fixed stoppers 20 and 21 in advance on the control lever 11 which is the final output control unit for the engine are performed by the two adjustment operations of the idle amount adjustment and the full adjustment of the injection amount. In Q), the idle rotation and the maximum output can be reliably ensured.

In the vehicle equipped with the control lever device of the present invention, the idle set angle and the pedal stroke of the accelerator pedal do not vary from vehicle to vehicle, and there is no possibility that the driving operability is deteriorated. Furthermore, when the vehicle is equipped with a complex control system and the engine output control amount is used as a control factor, the initial phase and stroke of the control lever as a signal source are fixed, contributing to the construction of a highly reliable control system. it can.

The shapes of the intermediate lever and the control lever are not limited to those in the above-described embodiment, but may be any shapes as long as the elongated holes can be aligned in the idle position. For example, as shown in FIG.
And an intermediate lever 42 whose other end side is slightly bent, and elongated holes 45 and 46 may be provided at the front end 43 and the other end 44, respectively.

In the above embodiment, the present invention is applied to a fuel supply control mechanism for a diesel engine. However, the present invention can be widely applied to a control mechanism having a control lever for performing the same control operation.

[0027]

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

A direct coupling lever attached to the control shaft, an intermediate lever engaged so as to adjust the rotation angle phase difference between the direct coupling lever, an elongated hole appropriately formed in the intermediate lever and the control lever, A pin rod for connecting the intermediate lever and the control lever by loosely fitting to the control lever, so that when the phase of the control shaft and the control rod is adjusted to obtain a desired output, the rotation range of the control lever can be changed. It is possible to adjust the angle of the control lever properly and eliminate variations in the angular phase of the control lever.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a control lever device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a side view showing a main part of another embodiment of the present invention.

FIG. 4 is a side view showing a conventional control lever device.

[Explanation of symbols]

 Reference Signs List 11 control lever 12 control shaft 13 direct connection lever 14 intermediate lever 15, 16 long hole 17 pin rod P idle position (first output position) Q maximum output position (second output position)

Claims (1)

(57) [Scope of request for utility model registration] 1. A control lever device for rotating a control shaft between a first output position and a second output position by a control lever rotating in a predetermined range, comprising: a directly connected lever attached to the control shaft; An intermediate lever pivotally supported by the control shaft and engaged so as to be able to adjust the rotational angle phase difference with the directly connected lever, respectively provided on the intermediate lever and the control lever, and these levers are overlapped as the first output position. And a slot formed so as to substantially coincide with each other at the second output position and intersect appropriately at the second output position. A control lever device comprising a pin rod for connecting a lever.