JP2003269194A - Mechanical governor for diesel engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a governor capable of adjusting a torque characteristic while operating an engine, and superior in a partial restoring rate in a medium- low speed area. <P>SOLUTION: A governor lever device 50 comprises a governor lever 2, a tension lever 3, and an Angleich lever 1. A torque control Angleich spring device 40 is arranged in the tension lever 3, and is constituted so as to control a maximum injection quantity of a fuel injection pump. An adjusting mechanism 60 of the Angleich spring device 40 is internally stored. The adjusting mechanism 60 has a notch type Angleich adjusting bolt 16 adjustable by a tool. The Angleich adjusting bolt 16 is arranged so as to partially project from the tension lever 3 of the adjusting mechanism 60. The adjusting mechanism 60 can be adjusted from the outside of a governor housing 19. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure of a mechanical governor used in a diesel engine.

[0002]

2. Description of the Related Art Generally, a mechanical governor for a diesel engine is constructed so that the centrifugal force of a governor weight is transmitted to a governor lever mechanism, and the governor lever mechanism controls the position of a control rack of a fuel injection pump. In such a mechanical governor, an governor with an Angreich spring is generally used as a governor provided with a torque control mechanism and having a good partial recovery rate even in the medium to low speed range.

FIG. 8 shows an example of a conventional governor with an Angleich spring. In FIG. 8, 101 is a control rack, 102 is a governor link, 103 is a spring lever, 104 is a governor housing, 105 is a governor lever, 106 is a torque spring mechanism, 107 is a stop lever, 108 is a tension lever, and 109 is an Angleich spring mechanism. , 110 is a starting spring,
111 is an Angle shifter, 112 is a sleeve, 11
3 is a governor weight support, and 114 is a governor weight. Torque control is enabled by the torque spring mechanism 106 and the Angleich spring mechanism 109.

In FIG. 8, a torque spring mechanism 10 is provided.
6 is provided outside the governor housing, and adjustment of the mechanism 106 is relatively easy as compared with the case where it is built in. On the other hand, Angreich spring mechanism 109
Is built into the governor housing. When adjusting the adjustment mechanism of the mechanism 109, the lid 115 of the adjustment window provided on the governor housing 104 is removed, the Angleich spring mechanism 109 is finely adjusted, and the lock nut 116 for preventing loosening is tightened. It is necessary to perform the difficult work described above, and the lubricating oil is scattered. Therefore, it is impossible to make adjustments while the engine is running.

[0005]

[Problems to be Solved by the Invention] In order to comply with the exhaust gas regulations of diesel engines, which are becoming increasingly strict,
It is necessary to adjust the maximum torque (output) in a wide engine rotation range with high accuracy and set it within the regulation value. For that purpose, it is necessary to develop a governor capable of adjusting the torque characteristics while operating the engine and having a good partial recovery rate in the medium to low speed range.

[0006]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described. That is, in claim 1, in a two-shaft mechanical governor for a diesel engine provided with a governor lever shaft and a control lever shaft, the governor lever mechanism has a governor lever, a tension lever, and an Angleich lever. The tension lever is provided with an Angleich spring mechanism for torque control to control the maximum injection amount of the fuel injection pump, and a built-in adjustment mechanism for the Angleich spring mechanism is provided. The adjusting mechanism is provided with a notch-type adjusting rotating portion that can be adjusted by means of, and the adjusting mechanism can be adjusted from the outside of the governor housing.

According to a second aspect of the present invention, the notch-type adjusting rotating portion is provided with a screw at the tip of the shaft and a taper portion and a notch portion on the outer peripheral surface of the shaft.

According to a third aspect of the present invention, the adjusting mechanism is provided with a notch plate that engages with the taper portion of the notch-type adjusting rotating portion, and is provided between the adjusting rotating portion and the notch plate. A biasing member is provided.

According to another aspect of the present invention, the governor housing is provided with a through hole for externally adjusting the notch-type adjusting rotary portion, and the through hole can be sealed by a sealing member. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a governor 30 according to an embodiment of the present invention will be described with reference to FIGS. 1 is a side sectional view showing a governor 30 which is an embodiment of the present invention, and FIG. 2 is a front sectional view of the same.

The governor 30, as shown in FIGS. 1 and 2,
It is configured as a two-shaft mechanical governor for a diesel engine, which includes a governor lever shaft 9 and a control lever shaft 21. The governor 30 has a governor lever mechanism 50.
And an Angleich spring mechanism 40 as a torque control means. In the following, the vertical direction of FIG. 1 is the vertical direction of the governor 30, and the horizontal direction of FIG. 1 is the front-back direction.
The side, that is, the left side of FIG. 1 is the front side.

In FIGS. 1 and 2, a cam shaft 23 of a fuel injection pump is supported by a lower portion of a pump housing 24, and one end of the cam shaft 23 has a pump housing 24.
It projects into the governor housing 19 of the governor 30 that is attached and fixed to. A governor weight 5 is rotatably attached to one end of the cam shaft 23, and the movement of the governor weight 5 due to a centrifugal force is transmitted to the lower end of the Angleich lever 1 via a sleeve 25. There is.

Angleich lever 1 and governor lever 2
The upper and lower intermediate parts are rotatably supported by the first rotating shaft 8 press-fitted into the tension lever 3, and are abutted and connected to each other by the urging force of the connecting spring 12.
The first rotation shaft 8 is provided coaxially with the governor lever shaft 9. Further, a rotary bearing bush 28 is press-fitted into the first rotary shaft 8, and the tension lever 3 is rotatably supported via the rotary bearing bush 28. The governor lever mechanism 50 is composed of the three levers provided rotatably around the governor lever shaft 9, the Angleich lever 1, the governor lever 2, and the tension lever 3.

An Angleich spring mechanism 40 for torque control is provided above the tension lever 3. In the Angleich spring mechanism 40, the Angleich shifter 7 slidably inserted into the tension lever 3 is urged toward the Angleich lever 1 side by the Angleich spring 6 provided in the mechanism 40.
The Angleich shifter 7 is in contact with the upper portion of the Angleich lever 1. The configuration of the Angleich spring mechanism 40 will be described in detail later.

The governor lever 2 has a link 2 at its upper end.
0 to the control rack of the fuel injection pump. Then, the link 2 is made by the governor lever 2.
By moving the control rack via 0, the fuel injection amount of the fuel injection pump is changed. As shown in FIG. 1, a direction in which the governor lever 2 rotates counterclockwise with respect to the governor lever shaft 9 is referred to as an increasing direction A. When the governor lever 2 rotates in the increasing direction A,
The fuel injection amount of the fuel injection pump is increased via the link 20 and the control rack. Further, a direction in which the governor lever 2 rotates clockwise with respect to the governor lever shaft 9 is referred to as a weight reduction direction B. When the governor lever 2 rotates in the reducing direction B, the fuel injection amount is reduced.

The tension lever 3 is connected to the tip of the spring lever 15 at a portion located above the governor lever shaft 9 via the connecting plate 44 and the governor spring 4. The base end portion of the spring lever 15 is a control lever shaft 2 which is parallel to the governor lever shaft 9.
1 is fixed to one end. The control lever 14 is connected to the other end of the control lever shaft 21. An operation mechanism (not shown) is connected to the control lever 14, and the control lever 1 is operated by the operation mechanism.
4 is rotated, the control lever shaft 21, the spring lever 15, the governor spring 4, and the connecting plate 4 are rotated.
The tension lever 3 is rotated via 4.

When the tension lever 3 is rotated in the increasing direction A, the Angleich lever 1 is rotated in the increasing direction A via the Angleich spring mechanism 40. Since the lower end of the Angleich lever 1 and the lower end of the governor lever 2 are connected by the connecting spring 13, the governor lever 2 is integrated with the Angleich lever 1 in the increasing direction A.
Rotate to and move the control rack in the fuel increase direction.

A starting spring 11 is interposed between the lower end of the tension lever 3 and the lower end of the Angleich lever 1 in a compressed state. The lower end of the Angleich lever 1 is urged toward the governor weight 5 side, and the governor lever 2
Is made movable to the fuel increase side, and the starting increase is ensured. In this way, by increasing the fuel injection amount at the time of starting, the starting performance is improved.

The governor housing 19 is also provided with a starting injection amount adjusting bolt 17 which comes into contact with the upper end of the Angleich lever 1. The start-time injection amount adjustment bolt 17 regulates the amount of rotation of the Angleich lever 1 in the increasing direction A to enable adjustment of the start-time injection amount.
The starting injection amount adjusting bolt 17 is a governor housing 19
After the adjustment, the cap 17a is put on to prevent accidental adjustment on the part of the user. In this way, the starting injection amount adjustment bolt 1
By making it possible to adjust the starting injection amount by 7, it is possible to make the starting injection amount appropriate and suppress the emission of black smoke at the start of engine startup.

Further, above the starting injection amount adjusting bolt 17 in the governor housing 19, an injection amount limiting bolt 18 for restricting the rotational operation position of the tension lever 3 is attached. The injection amount limiting bolt 18 can come into contact with the upper end portion of the tension lever 3, and when the tension lever 3 comes into contact with the injection amount limiting bolt 18, the tension lever 3 is further rotated in the increasing direction A. Regulated. The injection amount limiting bolt 18 can be operated from the outside of the governor housing 19, and after the adjustment, the cap 18a is attached to prevent inadvertent adjustment by the user side or the like. As a result, the fuel injection amount of the fuel injection pump is limited and the maximum output is regulated.

The Angleich spring mechanism 40 will be described with reference to FIGS. 1 to 4. 3 is a perspective view showing the Angleich shifter 7, and FIG. 4 is a perspective view showing the Angleich adjusting bolt 16. Tension lever 3
As shown in FIG. 1 and FIG. 2, there is provided an Angleich spring mechanism 40 for torque control. Governor 3
0 is the adjustment mechanism 6 of the Angleich spring mechanism 40.
0 is built in, and the adjusting mechanism 60 is attached to the mechanism 40. The Angleich spring mechanism 40 and the adjusting mechanism 60 are both provided above the tension lever 3.

As shown in FIG. 1, an insertion hole 3a is formed in the tension lever 3 in a direction parallel to the cam shaft 23, and an Angleich shifter 7 is inserted into the insertion hole 3a. A screw 42 is screwed and fixed to the rear end of the insertion hole 3a.

As shown in FIG. 3, the Angleich shifter 7 has shaft portions 7a, 7b, which extend from the front end to the rear end on the insertion side.
A disk portion 7c and a pair of contact portions 7d and 7d are provided. The abutting portions 7d, 7d are provided at the rear end of the disk portion 7c, a gap is formed between the abutting portions 7d, 7d, and when the shifter 7 is inserted, it goes downward from above. Accordingly, a slanted portion 7e having a thick wall is formed. Although the inclined portion 7e is formed as a flat surface in this embodiment, it may be formed as a convex curved surface. The rear end surfaces of the contact portions 7d and 7d are contact portions with the Angleich lever 1. The inclined portion 7e is a contact portion with the Angleich adjusting bolt 16, which is a notch-type adjusting rotating portion. These will be described later.

The inner diameter of the insertion hole 3a is the same as the outer diameter of the disk portion 7c of the Angleich shifter 7. In addition, the screw 42 is provided with an insertion hole that allows the shaft portion 7a to slide. That is, the Angleich shifter 7 can slide in the insertion hole 3a. Further, between the insertion side (front side) end surface of the screw 42 and the insertion side (rear side) end surface of the disk portion 7c of the Angleich shifter 7, the Angleich spring 6 is provided.
Is provided. And Angrich spring 6
Urges the Angleich shifter 7 to the front side.

The adjusting mechanism 60 of the Angleich spring mechanism 40 is provided with an Angleich adjusting bolt 16 which is a notch-type adjusting rotating portion which can be adjusted by a tool or the like. As shown in FIG. 1, the tension lever 3 has an insertion hole 3b formed in the vertical direction.
The Angleich adjusting bolt 16 is inserted into the. A female screw 3c is formed at the lower end of the insertion hole 3b, and the screw portion 1 formed at the tip of the Angleich adjusting bolt 16 is formed.
6a is screwed together.

As shown in FIG. 4, the Angleich adjusting bolt 16 has a threaded portion 16 from the insertion end to the rear end.
a, a tapered portion 16b in which the outer peripheral surface of the shaft is tapered, and a notch portion 16c in which a notch is also formed in the outer peripheral surface of the shaft are provided, and a bolt head 16d is provided behind the notch portion 16c.
Is provided. The taper portion 16b is a contact portion with the inclined portion 7e of the Angleich shifter 7. Further, in this embodiment, the notch portion 16c is formed with a notch (notch) so that the cross-sectional shape becomes a regular hexagon. A groove 15e is formed on the outer diameter of the rear end surface of the bolt head 16d. A tip of a tool such as a flat-blade screwdriver is inserted into the groove 15e so that the Angleich adjusting bolt 16 can be rotated by the tool. There is.

With the above structure, the protrusion amount of the Angleich shifter 7 biased from the tension lever 3 toward the Angleich lever 1 side is regulated by the Angleich adjusting bolt 16. Specifically, when the Angleich adjusting bolt 16 is rotated by a tool, the adjusting bolt 16 moves up and down in a direction perpendicular to the Angleich shifter 7, and the taper portion 16b of the tapered portion 16b in the axial direction of the Angleich shifter 7 is moved. The amount of protrusion changes. The Angleich shifter 7 that abuts the tapered portion 16b at the inclined portion 7e changes the front-rear position (position in the axial direction of itself) according to the amount of protrusion of the tapered portion 16b.

Torque control in the governor 30 provided with the Angleich spring mechanism 40 will be described with reference to FIGS.
This will be described with reference to FIGS. FIG. 5 is a diagram showing a state of stroke of the Angleich lever 1, and FIG. 6 is a diagram showing a correspondence relationship between the rotational speed of the cam shaft 23 and the position of the control rack 27.

The following forces act on the Angleich lever 1. The starting spring 11 provided between the Angleich lever 1 and the tension lever 3 applies a force for biasing the Angleich lever 1 in the increasing direction A.
This force is required only when the engine is started, its magnitude is small, and does not affect the fuel amount increase by the torque control when a load is generated. Therefore, it is ignored below. When the engine is rotating, the sleeve 25 applies a force N that presses the Angleich lever 1 in the weight reduction direction B by the centrifugal force generated by the rotation of the cam shaft 23. Further, in the Angleich spring mechanism 40 provided on the tension lever 3, the Angleich spring 6 applies a force F for urging the Angleich shifter 7 in the increasing direction A. The Angleich shifter 7 presses the Angleich lever 1 in the increasing amount direction A by the urging force F.

The Angleich lever 1 has a configuration described later (the pad 26 and the Angleich adjusting bolt 10).
It can come into contact with the tension lever 3. The Angleich lever 1 is pressed by the sleeve 25 and the tension lever 3
When contacted with, the biasing force of the governor spring 4 acting on the tension lever 3 (hereinafter, governor spring force) acts on the Angleich lever 1. That is, the Angleich lever 1 has its own rotational direction depending on the magnitude of the pressing force N of the sleeve 25 acting in the decreasing direction B and the urging force F and the governor spring force of the Angleich spring 6 acting in the increasing direction A. It is determined. Especially the sleeve 2
When the pressing force N from the 5 side is reduced and the tension lever 3 contacts the injection amount limiting bolt 18 and the rotation is stopped, the pressing force N in the decreasing direction B and the urging force in the increasing direction A are increased. The direction of rotation of the Angleich lever 1 is determined by the size of F. In this state, Angleich lever 1
The injection amount is increased by.

The sliding range of the Angleich shifter 7 will be described. The sliding of the Angleich shifter 7 toward the Angleich lever 1 side is restricted by the Angleich adjusting bolt 16 as described above. A second Angleich adjusting bolt 10 is provided on the tension lever 3 below the governor lever 7. The adjustment bolt 1
No. 0 has a male screw and the tension lever 3
A female screw is formed on each of these and they can be screwed together.
The second Angleich adjusting bolt 10 is fastened and fixed to the tension lever 3 by the lock nut 29. The second Angleich adjusting bolt 10 can come into contact with the Angleich lever 1. Sleeve 25 of the adjusting bolt 10
The side end and the pad 26 provided on the Angleich lever 1 come into contact with each other. By adjusting the screwing position of the second Angleich adjusting bolt 10 with respect to the tension lever 3, the pushing amount (sliding amount) of the Angleich shifter 7 at the time of contact between the Angleich lever 1 and the tension lever 3 changes. Then, the pressing force (biasing force F) of the Angleich spring 6 is adjusted. In the injection amount increasing state by the Angleich lever 1 described above, the increase in the injection amount is determined by the magnitude of the pressing force N by the sleeve 25 and the biasing force F by the Angleich spring 6. Therefore, by adjusting the urging force F, the rotational speed at which the injection amount increase is started is adjusted. The increase start rotational speed position of the Angleich spring 6 shown in FIG. 6 can be adjusted by adjusting the screwing position of the second Angleich adjusting bolt 10.

The state where the pad 26 and the adjusting bolt 10 are in contact with each other is the limit at which the Angleich lever 1 can be rotated to the tension lever 3 side as much as possible. Therefore, this rotational position is the limit position for sliding the Angleich shifter 7 to the side opposite to the Angleich lever 1. On the other hand, the Angleich shifter 7 slides toward the Angleich lever 1 side, as described above, by the Angleich adjusting bolt 16
It is regulated by. This sliding range is the stroke width of the Angleich shifter 7. The stroke width is equal to the stroke width d of the Angleich lever 1 when the engine rotates and the sleeve 25 presses the Angleich lever 1. The stroke width d is shown in FIG.
It is illustrated in (c).

Control of fuel injection amount described above (torque control)
Will be described as an example when the engine shifts from the no-load / maximum rotation speed state to the overload state. First, at the position Hi point of the no-load maximum rotation speed in FIG. 6, the pressing force N of the sleeve 25 generated by the centrifugal force of the governor weight 5,
The tension of the governor spring 4 is balanced and the governor 30 is in the controlled state. Next, when a load is gradually applied, the pressing force N of the sleeve 25 decreases as the engine speed decreases, and the tension lever 3 rotates counterclockwise by the urging force of the governor spring 4 and the injection amount becomes Will be increased.
Furthermore, when the load increases and the rotation speed decreases to the rated position shown in FIG. 6, the tension lever 3 moves the injection amount limiting bolt 18
It contacts with and stops the rotation. That is, the injection amount is limited to the rated output position.

The tension lever 3 is the injection amount limiting bolt 1
8, the pressing direction N in the decreasing direction B and the urging force F in the increasing direction A determine the rotational direction of the Angleich lever 1. In this state, while the pressing force N is larger than the urging force F, as shown in FIG. 5A, the Angleich shifter 7 is still pushed into the sliding limit position on the side opposite to the Angleich lever. Further, when the engine shifts to the overload state, the rotation speed of the cam shaft 23 decreases and the pressing force N of the sleeve 25 decreases. When the pressing force N becomes smaller, the force in the decreasing direction B due to the pressing force N of the sleeve 25 becomes smaller than the urging force F of the Angleich spring 6 in the increasing direction A as shown in FIG. 5B. At this time, Angreich lever 1
Is pushed by the Angleich shifter 7 and rotates in the increasing direction A. When the Angleich lever 1 rotates in the increasing direction A, the control rack moves to the fuel increasing position via the governor lever 2, the link 20, etc., and the torque output of the engine improves. In FIG. 6, when the cam rotation speed shifts from the high side to the low side, the control rack is at the rated position while the pressing force N is larger than the urging force F. In FIG. 6, the rack position is a portion that does not change from the rated position and is parallel to the horizontal axis. When the pressing force N becomes smaller than the urging force F, the Angleich lever 1 rotates in the increasing direction A, and the control rack moves to the fuel increasing side. Figure 6
It is the part that is inclined inside.

Even if the overload state continues, the rotation speed of the cam shaft 23 decreases, and the pressing force N of the sleeve 25 continues to decrease, the protrusion of the Angleich shifter 7 toward the Angleich lever 1 side is It is regulated by the Angleich adjusting bolt 16. As shown in FIG. 5C, when the Angleich shifter 7 contacts the Angleich adjusting bolt 16, the sliding of the Angleich shifter 7 toward the Angleich lever 1 side stops. Then, the Angleich lever 1 also stops in a state of contacting the Angleich shifter 7. In this state, the fuel injection is maximized by the Angleich spring mechanism 40, and the maximum torque is exerted. In FIG. 6, the rotation of the Angleich lever 1 is also stopped by the stop of the Angleich shifter 7, and the position of the control rack does not change even if the rotational speed of the camshaft shifts to the lower side. In FIG. 6, it is a portion where the rack position is constant on the amount increasing side of the rack position at the rated position. The rack position at the time of maximum torque is a position where the stroke width D corresponding to (proportional to) the stroke width d of the Angleich lever 1 is changed from the rated position to the increasing side. The stroke width D is the amount of displacement according to the displacement of the stroke width d via the governor lever 2, the link 20, and the like.

In the above, the Angleich adjusting bolt 1
The rotation operation of 6 has the following effects. If the protrusion amount of the taper portion 16b is increased on the shaft of the Angleich shifter 7 by moving the Angleich adjusting bolt 16 downward, the protrusion amount of the Angleich shifter 7 toward the Angleich lever 1 becomes smaller. That is, the stroke width d becomes smaller, and the limit rotational position of the Angleich lever 1 toward the increasing direction A side is displaced toward the decreasing direction B side. Therefore, as shown in FIG. 6, the stroke width D at the rack position corresponding to the stroke width d of the Angleich lever 1
Becomes smaller, and the rack position at maximum torque descends to the position shown by the chain double-dashed line in the figure. On the other hand, move the Angleich adjusting bolt 16 upward to move the Angleich shifter 7
When the amount of protrusion of the taper portion 16b is reduced on the axis of, the amount of protrusion of the Angleich shifter 7 toward the Angleich lever 1 side increases. That is, the stroke width d increases, and the limit rotational position of the Angleich lever 1 in the increasing direction A side is further displaced in the increasing direction A side. Therefore, as shown in FIG. 6, the stroke width D of the rack position corresponding to the stroke width d of the Angleich lever 1 also increases, and the rack position at maximum torque rises to the position indicated by the broken line in the figure.

In other words, the maximum torque of the engine can be adjusted by rotating the Angleich adjusting bolt 16, which is the adjusting rotating portion provided in the adjusting mechanism 60.

A configuration in which the adjusting rotary portion (Angreich adjusting bolt 16) provided in the adjusting mechanism 60 is of a notch type will be described with reference to FIGS. 1, 2 and 7. FIG. 7 is a plan view showing the engagement structure between the notch plate 62 and the Angleich adjusting bolt 16.

At the upper part of the front end surface of the tension lever 3,
As shown in FIGS. 1, 2, and 7, a notch plate 62 is fixedly installed. The notch plate 62 is an L-shaped member in a side view, and includes a base portion 62a and an engaging portion 62 that are perpendicular to each other.
It is composed of two surface portions b and b. The base portion 62a is located on the front side of the tension lever 3, and the engaging portion 62b is located above the insertion hole 3b into which the Angleich adjusting bolt 16 is inserted. An engaging groove 62c is formed in the engaging portion 62b, and the engaging portion 62b has a bifurcated shape in a plan view. The engaging groove 62c is formed such that the left and right widths are uniform and the left and right sides are parallel from the end side (rear side) to the back side (front side).
The inner part is formed wider than the uniform part. Also,
The notch portion 16c of the Angleich adjusting bolt 16 is formed such that the surface of the notch is parallel to the axis of the adjusting bolt 16. Therefore, the notch portion 16c of the Angleich adjusting bolt 16 can be engaged with the engaging portion 62b.
The engaging portion 62b is formed in a thin plate shape. Therefore, the elasticity of the engaging portion 62b can be used to rotate the Angleich adjusting bolt 16 in a state where the Angleich adjusting bolt 16 is engaged with the engaging groove 62c. That is,
With the notch surface of the notch portion 16c parallel to the left and right of the engaging groove 62c, the Angleich adjusting bolt 16 is stably held and positioned by the engaging portion 62b. Also,
In this state, when the Angleich adjusting bolt 16 is rotated against the elasticity of the engaging portion 62b, the notch surface of the notch portion 16c is again stable at the position parallel to the left and right of the engaging groove 62c. Retained. In this embodiment, the notch portion 16
The section c has a hexagonal cross section and is in a stable holding position every 60 degrees. That is, the number of notches per revolution of the Angleich adjusting bolt 16 is six.

With the above configuration, the Angleich adjusting bolt 16 is arranged so as to partially project from the tension lever 3 which is also the casing of the adjusting mechanism 60. The bolt head 16d of the adjusting bolt 16 faces upward. On the other hand, in the governor housing 19, a wall facing the bolt head 16d is provided with a through hole 32 for adjusting the Angleich adjusting bolt 16 with a tool or the like.
Therefore, the Angleich adjusting bolt 16 can be adjusted from the outside of the governor housing 19. In this embodiment,
A through hole 32 is provided in the governor housing 19, and the through hole 3
2 is configured to be sealed by a dish type plug 22 described later, but the configuration is not limited to this. As a configuration in which the Angleich adjusting bolt 16 can be adjusted from the outside, for example, one corner of the governor housing 19 may be detachable by bolt fastening or the like so that the inside can be opened. In particular, the Angleich adjustment bolt 16
Is partially protruded from the tension lever 3, so that the Angreich adjusting bolt 16 can be adjusted with a tool such as a screwdriver by simply opening a part of the governor housing 19. After the governor housing 19 is opened, it is not necessary to disassemble the members in the governor housing 19 and secure a space for adjustment in order to adjust the Angleich adjusting bolt 16.

The structure of the Angleich shifter 7 provided in the Angleich spring mechanism 40 and the Angleich adjusting bolt 16 provided in the adjusting mechanism 60 has the following effects.
The screw pitch of the screw portion 16a of the Angleich adjusting bolt 16 and the taper angle θ of the taper portion 16b determine the sliding amount of the Angleich shifter 7 per one rotation of the adjusting bolt 16. In particular, as the taper angle θ approaches 0 degrees, the sliding amount of the shifter 7 per one rotation of the adjusting bolt 16 becomes smaller. The taper angle θ of the tapered portion 16b
And the inclination angle of the inclined portion 7e of the shifter 7 are the same. In addition, the adjustment bolt 16 has a plurality of notches per rotation due to the configuration of the notch portion 16c and the engaging portion 62b.

Therefore, as a result of the above, the rotating position can be adjusted in a notch type (scale) by rotating the Angleich adjusting bolt 16, and the Angle pitch is selected by selecting the screw pitch and the taper angle θ. The sliding amount of the shifter 7 can be finely adjusted. As will be described in detail later, the shift range of the Angleich lever 1 is limited by the shifter 7, and the fuel injection amount is changed by the turning position of the governor lever 2 due to the engagement between the Angleich lever 1 and the governor lever 2. That is, by making the sliding amount of the shifter 7 finely adjustable, the fuel injection amount can be finely adjusted. In addition, the notch number of the notch portion 16c, the screw portion 16
By selecting the screw pitch of a and the taper angle θ of the taper portion 16b, it is possible to configure the Angleich adjusting bolts 16 having different adjustment amounts. Fine adjustment of the fuel injection amount can be performed in different patterns by the different adjustment amount of the Angleich adjusting bolts 16. Further, by finely adjusting the fuel injection amount, it is possible to clear the strict exhaust gas regulation by finely adjusting the maximum torque (output) of the engine and improve workability by one-touch operation with a tool such as a driver.

To summarize the above, the governor 30 of this embodiment is used.
First, is configured as a two-shaft mechanical governor for a diesel engine, which includes a governor lever shaft 9 and a control lever shaft 21. Further, the governor 30 is provided with a governor lever mechanism 50 and an Angleich spring mechanism 40 as torque control means. The governor lever mechanism 50 is provided with an Angleich lever 1, a governor lever 2, and a tension lever 3. The tension lever 3 is provided with an Angleich spring mechanism 40, and the maximum injection amount of the fuel injection amount pump is controlled via the levers, the link 20, and the like that form the governor lever mechanism 50. In addition, the Angleich spring mechanism 40
The adjusting mechanism 60 is incorporated in the governor 30. The adjusting mechanism 60 is provided with an Angleich adjusting bolt 16 that is a notch-type adjusting rotating portion that can be adjusted by a tool or the like. The Angleich adjusting bolt 16 is arranged so as to partially protrude from the tension lever 3 of the adjusting mechanism 60. By providing the through hole 32 in the governor housing 19, it is possible to adjust from the outside with a tool such as a screwdriver. . It is not necessary to disassemble other members incorporated in the governor 30 when adjusting the adjusting mechanism 60.

Therefore, in a governor with an Angleich spring having a good torque recovery rate in a partial (light load range), the maximum torque (output) can be obtained while operating the engine.
Can be adjusted. Therefore, the operator can efficiently and comfortably perform the torque adjustment that corresponds to the strict exhaust gas regulation, is a clean engine, and does not cause engine stall due to a good partial recovery rate. In addition, since the adjustment can be performed by one-touch adjustment with a tool such as a driver, workability is improved and the cost of engine production can be reduced.

Next, a structure for improving the durability of the adjusting mechanism 60 will be described with reference to FIG. As shown in FIG. 1, the notch plate 62 and the Angleich adjusting bolt 16
A spring 63, which is a biasing member, is provided between and. More specifically, the spring 63 is disposed between the upper surface of the engaging portion 62b of the notch plate 62 and the bolt head 16d of the Angleich adjusting bolt 16. The urging force of the spring 63 acts between the notch plate 62 and the Angleich adjusting bolt 16.

Therefore, due to the urging force between the notch plate 62 and the Angleich adjusting bolt 16 which is a notch-type adjusting rotary portion, the backlash of the contact portion between the tension lever 3 and the Angleich adjusting bolt 16 is caused. As a result, the screw portion 16a of the Angleich adjusting bolt 16 caused by the vibration of the engine is prevented from being worn.

Next, the means for sealing the through hole 32 will be described with reference to FIGS. As described above, in the governor housing 19, the wall facing the bolt head 16d is provided with the through hole 32 for adjusting the Angleich adjusting bolt 16 with a tool or the like. The through hole 32 has a circular shape, and the first opening 3 on the inner side of the governor 30.
2a and a second opening 32b that is provided outside the governor 30 and communicates with the first opening 32a. The second opening 32b has a larger diameter than the first opening 32a. The dish-shaped plug 22, which is a sealing member, is fitted into the second opening 32b so that the through hole 32 can be sealed. The dish plug 22 has a shape obtained by cutting off a part of a spherical surface, and can be fitted into a hole that is slightly narrower than its outer circumference against the elasticity of itself. Then, once it is fitted, it is pulled out by the elasticity of itself to prevent it from falling off. Further, the sealing member is not limited to the dish-shaped plug 22, and any member that does not easily fall off once fitted can be used.
Other members may be used.

The dish-shaped plug 22 is fitted into the through hole 32 when the engine including the governor 30 is manufactured.
It is performed after the adjustment of the adjusting mechanism 60 is completed. Further, since the dish-shaped plug 22 is fitted against the elasticity, the fitting operation is performed mechanically rather than manually.

Therefore, after the adjustment of the adjusting mechanism 60 is completed, the through hole 32 is closed by the sealing member such as the dish plug 22.
It is sealed to the extent that it cannot be opened manually, and cannot be released easily. In addition, inexpensive parts can be easily installed. In the US EPA regulations, in order to comply with exhaust gas regulations, it is legally stipulated that parts that affect engine performance, especially those related to fuel injection amount, are sealed and cannot be easily released and changed in the market in a short time. However, the configuration of the present invention complies with this regulation.

[0050]

According to the first aspect of the present invention, in a two-shaft type mechanical governor for a diesel engine having a governor lever shaft and a control lever shaft, a governor lever mechanism is provided with a governor lever, a tension lever and an Angleich lever. In addition, the tension lever is provided with an Angleich spring mechanism for torque control to control the maximum injection amount of the fuel injection pump, and an adjusting mechanism for the Angleich spring mechanism is built-in. Since the adjustment mechanism is adjustable from the outside of the governor housing by providing a notch-type adjustment rotation part that can be adjusted by a rotation operation, the engine can be operated in a governor with an Angleich spring with a good partial recovery rate. However, the maximum torque (output) can be adjusted. Therefore, the operator can efficiently and comfortably perform the torque adjustment that corresponds to the strict exhaust gas regulation, is a clean engine, and does not cause engine stall due to a good partial recovery rate. In addition, since the adjustment can be performed by one-touch adjustment with a tool such as a driver, workability is improved and the cost of engine production can be reduced.

According to a second aspect of the present invention, the notch-type adjusting rotating portion is provided with the screw at the tip of the shaft and the taper portion and the notch portion on the outer peripheral surface of the shaft. The rotating position of the adjusting rotating portion can be adjusted in a notch type (scale) by rotating the moving portion, and the Angleich shifter provided in the Angleich spring mechanism is selected by selecting the screw pitch and the taper angle. The amount of sliding can be finely adjusted. By allowing the sliding amount of the Angleich shifter to be finely adjusted, the fuel injection amount can be finely adjusted. In addition, by selecting the number of notches in the taper portion, the thread pitch of the screw portion, and the taper angle of the taper portion, it is possible to configure the Angleich adjusting bolts having different adjustment amounts. Fine adjustment of the fuel injection amount can be performed in different patterns by the different adjustment amount of the Angleich adjusting bolts. And by fine-tuning the fuel injection amount, clearing the strict exhaust gas regulations by fine-tuning the maximum torque (output) of the engine,
In addition, workability can be improved by one-touch operation with a tool such as a driver.

According to a third aspect of the present invention, the adjusting mechanism is provided with a notch plate that engages with the tapered portion of the notch-type adjusting rotary portion, and between the adjusting rotary portion and the notch plate. Since the urging member is provided, a damper is formed between the notch plate and the notch-type adjusting rotating portion.
The damper removes the play in the contact portion between the Angleich shifter and the Angleich adjusting bolt 16 provided in the Angleich spring mechanism, and prevents the screw portion formed on the adjusting rotating portion from being worn.

According to the fourth aspect, the governor housing is provided with a through hole for externally adjusting the notch-type adjusting rotary portion, and the through hole can be sealed by the sealing member. After the adjustment of the adjusting mechanism is completed, the through-hole is sealed by a sealing member such as a dish-shaped plug to the extent that it cannot be opened manually and cannot be released easily. In addition, inexpensive parts can be easily installed. In the US EPA regulations, in order to comply with exhaust gas regulations, it is legally stipulated that parts that affect engine performance, especially those related to fuel injection amount, are sealed and cannot be easily released and changed in the market in a short time. However, the configuration of the present invention complies with this regulation.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a governor 30 which is an embodiment of the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a perspective view showing an Angleich shifter.

FIG. 4 is a perspective view showing an Angleich adjusting bolt 16.

FIG. 5 is a diagram showing a state of a stroke of the Angleich lever 1.

FIG. 6 shows the rotation speed of the cam shaft 23 and the control rack 27.
It is a figure which shows the correspondence with the position of.

FIG. 7 is a plan view showing an engagement configuration of a notch plate 62 and an Angleich adjusting bolt 16.

FIG. 8 is a side sectional view showing an example of a conventional governor with an Angleich spring.

[Explanation of symbols]

1 Angleich lever 2 Governor lever 3 Tension lever 9 Governor lever shaft 16 Angleich adjusting bolt (rotating part for notch type adjustment) 16a Screw part 16b Tapered part 16c Notch part 19 Governor housing 21 Control lever shaft 22 Dish plug 30 Governor 32 Through hole 40 Angleich spring mechanism 50 Governor lever mechanism 60 Adjustment mechanism 62 Notch plate 63 Spring (biasing member)

Claims (4)

[Claims] 1. A two-shaft type mechanical governor for a diesel engine provided with a governor lever shaft and a control lever shaft, wherein the governor lever mechanism comprises a governor lever, a tension lever, and an Angleich lever, and the tension lever is attached to the tension lever. An Angleich spring mechanism for torque control is provided to control the maximum injection amount of the fuel injection pump, and an adjustment mechanism for the Angleich spring mechanism is built in, and the adjustment mechanism can be adjusted by rotating operation. A mechanical governor for a diesel engine, comprising a notch-type adjusting rotating portion, and the adjusting mechanism can be adjusted from the outside of the governor housing. 2. The notch-type adjusting rotating portion is provided with a screw at the tip of the shaft and a taper portion and a notch portion on the outer peripheral surface of the shaft. The listed mechanical governor for diesel engines. 3. The adjusting mechanism is provided with a notch plate that engages with a taper portion of the notch-type adjusting rotating portion, and a biasing member is provided between the adjusting rotating portion and the notch plate. The mechanical governor for a diesel engine according to claim 1 or 2, characterized in that 4. The governor housing is provided with a through hole for externally adjusting the notch-type adjusting rotary portion, and the through hole can be sealed by a sealing member. The mechanical governor for a diesel engine according to any one of claims 1 to 3.