JP2507070Y2 - Governor for fuel injection system for diesel engine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a governor for a fuel injection device for a diesel engine.

Prior Art A conventional governor for a diesel engine fuel injection device is
Shown in the figure. A flyweight 2 is attached to a camshaft 1 of a fuel injection pump (not shown). The flyweight 2 rotates around a pin 4 press-fitted in a flyweight holder, and when the flyweight 2 opens outward, the flyweight 2 is opened. Roller 6 attached to the end of the second arm 5
Acts to push the shoulder of the sleeve 7 in the axial direction.

A sleeve 7 that slides on the roller 6 of the flyweight 2 is connected to a shifter 9 via a bearing. The shifter 9 moves only in the axial direction and the shifter 9 is hung on a pin of a governor cover (not shown). Lowered guide lever 10
It is fitted to the shaft to prevent the shifter 9 from rotating.

The floating lever 11 is attached to a guide lever 13 by a pin 12 with its lower end as a fulcrum, and is connected to a control rack 15 via a link 14.

A start spring 16 'is hung on the upper end of the floating lever 11, and the control rack 15 is always pulled in the fuel increasing direction.

The rotating shaft 17 of the swivel lever 16 is fitted in the bush of the governor cover, and its center is eccentric with respect to the mounting position of the governor spring 19 hung on the tension lever 18.

When the governor spring 19 hung on the nut part 20 of the swivel lever 16 receives a tension, the tension lever 18 comes into contact with the full load stopper bolt 22 whose lower end can be adjusted.

It should be noted that the swivel lever 16 is provided with protrusions on both ends thereof, which hit the side surface of the guide lever 13 when the engine is stopped and serve to set the control rack 15 to the non-injection position.

When the tilt angle of the control lever 3 is changed, the angle of the swivel lever 16 is also changed and the tension of the governor spring 19 is changed. Also, the swivel lever 16's nut part 20
An adjusting screw 23 is attached to the and the adjusting screw 23 changes the tension of the governor spring 19 to adjust the speed fluctuation rate.

An Angleich spring 24 is incorporated below the tension lever 18. This Angleich spring
The 24 serves to continuously correct between idling speed and full load speed within a certain range to suit the fuel requirement of the engine.

In addition, the standard type governor does not have a stopping device, but it is a special type and has a stopping device that returns the control rack 15 to the stop position independently of the governor control lever position when the engine is stopped. There is something.

In this mechanism, as shown in FIG. 9, the pin 25 at the lower end of the floating lever 11 is fitted in the slot of the supporting lever 26, and when the stop lever 28 is operated to the stop position, the return spring 29 'is pressed and the supporting lever 29' is pressed. 26
A spring 27 is incorporated inside, and the shaft 29 is constantly pressed by the spring 27, so that the movement thereof is transmitted to the floating lever 11.

Therefore, the control rack 15 can be directly pulled to the stop position to stop the engine regardless of the action of other lever mechanisms.

As described above, by moving the control lever 3, the swivel lever 16 is rotated, the tension of the governor spring 19 is changed, and the point with the flyweight 2 is changed to change the rotational speed.

The speed control by the control lever 3 has a torque characteristic that varies depending on the position (1,2,3,4 ... i) of the control lever 3 as shown in FIG. 7, whereby the basic control is performed. There is.

The control of the engine torque with respect to the engine rotation speed is performed by the Angleich spring 24, and the set torque, stroke, and spring constant of the Angleich spring 24 are used to control the torque characteristics shown in FIG.

To stop the engine, either return the control lever 3 to the stop position or install a stop mechanism as shown in FIG.
This is done by moving 28.

Problems to be Solved by the Invention As described above, in the conventional technology, it is necessary to control the engine torque with respect to the engine rotation speed by adjusting the biasing force of the Angleich spring, in addition to the speed control by the control lever. However, the setting of the Angleich mechanism by adjusting the urging force of the Angleich spring must be individually performed when using the generator or the engine for industrial use.

Purpose of the Invention The present invention has been made in view of the above, and by operating the stop lever of the stopping device in conjunction with the movement of the control lever that controls the engine speed, the all-speed control range of the control lever is controlled. The torque characteristic can be set according to the setting of the engine rotation speed by the control lever without adjustment by the Angleich mechanism, and the torque characteristic can be set when the engine is used for each application. It is an object of the present invention to provide a governor for a fuel injection device for a diesel engine, which can meet several specifications only by setting a control lever.

Means and Actions for Solving Problems In order to achieve the above object, the present invention rotates the swivel lever 16 by a moving operation to move the governor spring 19.
Control lever 3 that changes the rotation speed by changing the tension of the flyweight 2 and the balance point with the flyweight 2
And a stopper lever 28 for moving the control lever 15 by rotating the floating lever 11 by a moving operation, a cam 32 is provided at the rotating base of the control lever 3, and the cam 32 is provided by the control lever 3. When the stop lever 28 is rotated in the direction of increasing the engine rotation, the stop lever 28 is slidably contacted with the stop lever 28 so that the stop lever 28 is rotated to the smaller engine torque side.

When the control lever 3 is operated, in the all speed control range of the control lever 3,
In conjunction with this, the stop lever 28 is actuated, and the torque characteristic is set according to the setting of the engine rotation speed by the control lever 3 (control lever position).

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

1 and 2 show a governor according to the present invention, the same components as those of the conventional governor shown in FIGS. 6 and 9 are designated by the same reference numerals to simplify the description. In FIG. 1, 30 is a fuel injection pump and 31 is a governor. The structure of this governor 31 is shown in FIG. This governor 31 is a governor with a stopping device.

A cam 32 is formed on the rotation base of the control lever 3 of the governor 31, and the cam 32 is slidably contacted with the side surface of the stop lever 28 of the stopping device so that the control lever 3 moves in the direction of the arrow (left direction in the figure). ) The rotation causes the stop lever (28) to rotate in conjunction with the arrow (to the right). These control lever 3
The stop lever 28 is provided outside the governor 31, and the control lever 3 is connected to an operating member (not shown).

FIG. 2 shows the internal structure of the governor 31, and the control lever 3 and the stop lever 28 provided outside the governor 31 are indicated by chain lines.

1 and 2 are schematic illustrations, and the control lever 3 and the stop lever shown in both figures are shown.
28 are shown in different shapes, but they are the same. Further, in FIG. 2, the control lever 3 and the stop lever 28 are shown by a chain line as described above, but the drawing of the cam 32 is omitted because the drawing line is complicated.

Swivel lever 16 similar to the conventional one shown in FIG.
Is configured to rotate integrally with the control lever 3, and by moving the control lever 3, the swivel lever 16 is rotated and the governor spring 19 is rotated.
The tension on the flyweight 2 is changed and the balance point of the flyweight 2 changes. The force of the flyweight 2 increases as the engine speed increases, and when the force of the flyweight 2 exceeds the tension of the governor spring 19 of the swivel lever 16, the tension lever 18 is moved to the right in FIG. In order to make it move, the shifter 9 moves to the right, and the floating lever 11 also moves to the right accordingly.
The control rack 15 moves in the direction of the arrow (to the right) to control the fuel injection amount in the small direction.

On the other hand, when the stop lever 28 of the stopping device is moved in the arrow direction, the floating lever 11 is rotated against the start spring 16 'to operate the control rack 15 in the engine stop direction. .

In this configuration, for example, when the control lever 3 is rotated in the arrow direction (left direction) in FIGS. 1 and 2, the swivel lever 16 rotates integrally with the control lever 3 and the tension of the governor spring 19 is increased. It becomes larger, and the balance point with the flyweight 2 is changed via the tension lever 18 in the direction of increasing the engine speed. Therefore, by changing the rotational position of the control lever 3 in the direction of the arrow to 1, 2, 3, 4, ... i, the engine rotational speed is changed from small to large in the direction of 1, 2, 3, 4 as shown in FIG. , ... i are sequentially controlled in the direction in which the engine rotation speed increases.

On the other hand, as the control lever 3 is rotated, the stop lever 28 is moved by sliding contact of the cam 32 with the control lever 3 as shown in FIGS.
As shown by the arrows in the figure, the rotational position is changed to 1,2,3,4, ... i, whereby the floating lever 11 is rotated in the direction of the arrow in Fig. 2, and as a result, it is connected to it. The control rack 15 thus moved is moved in the direction of the arrow in FIG. 2 (the direction of decreasing the fuel injection amount), so that the engine torque is increased from the large direction to the small direction as shown in FIG. The engine torque is sequentially controlled to decrease.

Thus, when the engine rotation speed is controlled by the rotation of the control lever 3, the engine torque can be controlled in conjunction with this.

FIG. 5 shows such a situation. For example, when the control lever 3 is in the 1 position, it is set A, and when it is in the 3 position, it is set B, and the set value of the engine torque can be changed together with the engine rotation speed.

The engine is stopped by manually rotating the stop lever 28 to the i position regardless of the operation of the control lever 3.

As described above, the engine torque is interlocked with the engine rotation speed and the torque control according to the engine rotation speed has a large variation range as compared with the conventional engine torque controlled only by the Angleich spring 24.

The Angreich spring 24 is also provided in the embodiment of the present invention shown in FIG. 2, and according to this embodiment, it is shown in FIG. 8 in the individual control state of each engine torque shown in FIG. It is controlled by the torque characteristic. In the present invention, the above Angreich spring mechanism is not particularly required.

Effect of the Invention As described in detail above, the governor of the fuel injection device for a diesel engine according to the present invention rotates the swivel lever 16 by a moving operation to change the tension of the governor spring 19 and change the balance point with the flyweight 2. In a governor provided with a control lever 3 for changing the rotation speed by means of a moving lever and a stopper lever 28 for rotating the floating lever 11 and moving the control rack 15 by a moving operation, a cam 32 is provided at the rotation base of the control lever 3.
The cam 32 is provided with a stop lever 28 so that when the control lever 3 is rotated in the engine rotation increasing direction, the stop lever 28 is rotated to the small engine torque side.
It is characterized by being in sliding contact with.

Therefore, when the control lever 3 is operated,
The stop lever 28 is operated by slidingly contacting the cam 32 of the control lever 3. Therefore, depending on the setting of the engine rotation speed by the control lever 3, the stop lever 28 is interlocked with this in the all speed control range of the control lever 3. The torque characteristic can be set by the stop lever 28, and when used in a generator or an industrial engine, the torque characteristic can be set without spending time for setting the Angleich mechanism. However, only the control lever 3 set can be used.

[Brief description of drawings]

FIG. 1 is an explanatory view schematically showing the appearance of an embodiment of the present invention,
FIG. 2 is an explanatory diagram schematically showing the internal structure of an embodiment of the present invention, FIGS. 3, 4, and 5 are engine torque characteristic diagrams, and FIG. 6 is a conventional governor constitution explanatory diagram. FIG. 7 is an engine torque characteristic diagram of a conventional governor, FIG. 8 is an engine torque characteristic diagram for explaining the operation of the Angleich mechanism, and FIG. 9 is a perspective view of a stopping device in the governor. 3 is a control lever, 16 is a swivel lever, 11 is a floating lever, 19 is a governor spring, 28 is a stop lever, and 32 is a cam.

Claims (1)

(57) [Scope of utility model registration request] Claims: 1. A swivel lever 16 is rotated by a moving operation to change the tension of a governor spring 19 to change a balance point with a flyweight 2 to change a rotation speed, and a floating lever 11 is moved by a moving operation. In a governor provided with a stop lever 28 that rotates and moves the control rack 15, a cam 32 is provided at the rotation base of the control lever 3, and the cam 32 is provided.
The fuel injection device for a diesel engine, wherein 32 is slidably contacted with the stop lever 28 so that the stop lever 28 is rotated to a smaller engine torque side when the control lever 3 is rotated in the engine rotation increasing direction. Governor.