JP2942104B2 - Diesel engine mechanical governor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical governor for a diesel engine, and more particularly, to a mechanical governor capable of variably controlling a speed fluctuation rate in response to an operation mode of the engine.

[0002]

2. Description of the Related Art A centrifugal force generated by a flyweight which is driven to rotate at a speed corresponding to the number of revolutions of an engine and an urging force of a main spring are applied to an intermediate link. In a conventional mechanical governor of a diesel engine that appropriately controls the amount of fuel supplied to a vehicle, a position (angle) of a fork lever that changes in response to a position of a speed lever operated by a driver is determined by an intermediate link. Often, the position of the control rack is optimally controlled by compensating for the equilibrium effect of the control rack. However, in such a conventional mechanical governor, the ratio of the amount of movement of the rack to the amount of movement of the flyweight shifter, that is, the lever ratio, is determined by the position of the speed lever. On the other hand, in the high-speed range, it is unavoidable that the speed fluctuation rate decreases.

[0003] Therefore, when a vehicle engine and an upper engine are used as in a crane carrier, for example, the vehicle engine is designed to optimize the accelerator feeling by increasing the speed fluctuation rate in a medium speed range. While it is desirable to reduce the speed fluctuation rate in the high-speed range and ensure speed controllability, as a luxury engine, the speed fluctuation rate in the mid-low speed range where the driving frequency is high is reduced to improve the rotation controllability. It is required to be high. Therefore, although it usually differs depending on the application of the vehicle, for example, when the function as an upper engine is emphasized, even if the controllability in the medium to low speed range as a vehicle engine is somewhat sacrificed, it can be used as an upper engine. Often, the controllability of the is increased.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a mechanical governor capable of changing a speed fluctuation rate in response to an operation mode of an engine. It is an object of the present invention to solve the problem associated with the dual use of.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a manually operated speed lever,
A fly that is slidably controlled by a fork lever having an intermediate portion pivotally connected to the tip of the speed lever and one end thereof connected to a control rack of the fuel injection pump, and a fly weight that generates centrifugal force corresponding to the engine speed. A weight shifter, an intermediate link that connects the fly weight shifter and the other end of the fork lever, and a main spring that oscillates and biases the intermediate link, wherein the fork lever changes in response to the position of the speed lever. The angle was corrected by the balance effect of the centrifugal force of the fly weight acting on the intermediate link via the fly weight shifter and the biasing force of the main spring, and the position of the control rack was corrected to optimize the fuel supply. In a mechanical governor of a diesel engine, the main It is characterized in that a set pressure switching means for switching control of the set pressure of pulling.

[0006]

[Action] When the engine is running, the fly weights
Of the strength corresponding to the engine speed at that time
Generates centrifugal force. The centrifugal force of fly weight
Added to one end of the intermediate link via a weight shifter
You. Intermediate link is supplied via flyweight shifter
Due to the centrifugal force of the fly weight and the main spring
To the position where the applied biasing force is balanced,
The connection point with the lever is set at the tip of the speed lever.
(The pivot point of the fork lever). And
Actual rotation of the engine relative to the swing angle of the speed lever
By changing the swing angle of the fork lever in response to the number of turns
Increase or decrease the stroke of the control rack, and
The rotation speed of the gin is maintained at a predetermined value.

By the way, as described above, the control rack
And fly weight to intermediate link and fork lever
In a mechanical governor linked by
Bana lever ratio (flywheel responding to engine speed)
Centrifugal force and stroke of control rack
The relationship. The same applies to the following).
Speed fluctuations in the middle and low speed range where the operating angle of the speed lever is small
Rate (refers to the amount of change in engine speed with respect to load change).
Hereinafter the same).

However, according to the present invention, the speed fluctuation rate
The set pressure of the main spring, which greatly affects the
Easy switching change from outside by switching operation of the set pressure switching means
For example, when driving as a vehicle engine
Increases the set pressure of the main spring to reduce the speed fluctuation rate.
If you want to use it as a high quality engine,
Reduce the speed fluctuation rate by lowering the spring set pressure
Can be

[0009]

【Example】 Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
explain. FIG. 1 shows a diesel engine according to the present invention.
FIG. 2 is a schematic configuration diagram showing an embodiment of a cannibal governor, and FIG.
FIG. 3 is a sectional view showing a specific configuration of a set pressure switching means.
In these figures, control the accelerator pedal 1
Tip of speed lever 3 connected via cable 2
Swingably and rotatably the middle part of the fork lever 4
Have been attached. 5 is the swing fulcrum of the speed lever 3 and 6 is
This is a swing fulcrum of the fork lever 4.

At the upper end of the fork lever 4, a fuel not shown
And rotation of the control rack 7 of the fuel injection pump
It is freely connected. The fuel injection pump is a fork
The upper end of lever 4 moves to the left in the
When the lock 7 is pushed to the left, it moves to an engine (not shown).
The fuel supply amount is increased.

An intermediate link is provided at the lower end of the fork lever 4.
The flyweight shifter 9 connected via the
Fly weight that is driven to rotate in synchronization with the rotation speed of the gin
10 are connected. And the engine speed rises
When the centrifugal force of the fly weight 10 increases,
Increased thrust to swing link 8 counterclockwise in the figure
I am trying to do it. 11 is fly weight shifter 9
The idle spring which presses and biases to the left in the figure, 12 is the middle
This is the swing fulcrum of the interlink 8. The intermediate link 8
The upper and lower ends of the fork lever 4 are
Sliding and rotatable engagement with the weight shifter 9 respectively
Have been combined.

Further , the intermediate link 8 is moved clockwise.
Is provided with a main spring 13 that urges the main spring to swing. So
The urging force of the main spring 13 causes the fly
Fly weight 1 transmitted via weight shifter 9
Rotate the intermediate link 8 to a position that balances with the centrifugal force of 0
As a result, the force at the tip of the speed lever 3 is
The swing angle of clever 4 is corrected and control rack 7
Change the amount of fuel supply by changing the stroke amount of
The engine speed according to the swing angle of the speed lever 3.
The mechanical governor that holds the value
You.

As described above, the fly weight 10
Equilibrium action by applying an urging force against the centrifugal force to the intermediate link 8
Increase the set pressure of the main spring 13
If the speed fluctuation rate increases, the main spring 13
The lower the cut pressure, the lower the speed fluctuation rate.

Therefore, the embodiment shown in FIGS.
Between the intermediate link 8 and the spring shaft 14
The main spring 13 is stretched and held. And
Form spring shaft 14 into set pressure switching lever 15
Following the cam 16 by the spring 17
To rotate the set pressure switching lever 15 so that the main
Increase or decrease the pressure adjustment interval of the pulling 13 to create the intermediate link 8.
The biasing force used is changed. In addition, Mei
The spring 13 is composed of the outer spring 13a and the outer spring 13a.
Inner pudding located inside the spring 13a
13b, and a double spring
Outer spring with movement of ring shaft 4
13a and set pressure of inner spring 13b at the same time
To change it.

That is, in this embodiment, the set pressure
As shown by a solid line in FIG. 1 and FIG.
When lying down, the spring shaft 14
The main spring is pressed by the ring 17 to the right in the drawing.
The tension interval of the bush 13 becomes narrower and is added to the intermediate link 8.
Biasing force increases. Conversely, the set pressure switching lever 15
1 and 2 as shown by the dashed line in FIG.
Then, the cam 16 moves against the spring 17
Move the shaft 14 to the left in the figure to
13 is added to the intermediate link 8 to increase the tension interval
Biasing force is reduced. 18 is a spring shaft 14
The cam follower screwed into and fixed to
0 is an intermediate link via a pin 21 and a bracket 22
8 is the spring receiver attached to this spring.
A flange provided at the end of the receiver 20 and the spring shaft 14
The main spring 13 is stretched and held between the
I have.

As described above, the set pressure switching lever 15 is raised.
If the spring shaft 14 is moved by the downward rotation operation,
Outer spring 13a and inner spring 13b
Of the main spring 13
The cut pressure changes. Then, the main spring 13
When the cut pressure changes, the biasing force increases, especially in the middle and low speed ranges.
And the speed fluctuation rate changes.

Therefore, a diesel engine can be used in a vehicle, for example.
Pressure switching lever 1 when operating as an engine for
5 to lower the set pressure of the main spring 13
To increase the speed fluctuation rate in the middle and low speed range and start the engine
It can be used as a high quality engine
In this case, the set pressure switching lever 15 is
Lower the set pressure of the pulling 13 to operate the
Reduce the speed fluctuation rate in the mid-low speed range where the
The controllability of the engine speed by the drive lever 3
be able to.

FIG . 3 shows a modification of the set pressure switching means.
FIG. In this variant, the full rotation of the engine
Only the inner spring 13b acting in the region
Works only in the high-speed region of the engine by holding it on the shaft 14
Outer spring 13a held on governor body 24
Let me. Then, slide the spring shaft 14
Control the actuator 25 to a controller (not shown)
Connect the outer spring 13a and spring
A clearance 26 is formed between the bearings 20.

Therefore, in the case of this modification, the outer
In the middle to low speed range where the spring 13a does not act,
Energizing with change in set pressure of the female spring 13b
Because the degree of force change is large, the spring
The speed fluctuation rate in the middle to low speed range by moving
Can be changed. However, Autaspurin
In the high-speed range where the motor 13a operates,
Inner spring against urging force of inspring 13
13b, the degree of change in the set pressure is small.
Speed fluctuation rate even if the pulling shaft 14 is moved
Does not change much .

[0020]

As apparent from the above description, the present invention relates to the present invention.
According to the diesel governor's mechanical governor,
Operating the set pressure switching means in response to the engine operation mode
By changing the set pressure of the main spring,
It is possible to precisely change the speed fluctuation rate at each rotation speed.
To be able to, for example, crane carriers or pumps
Like a car, a vehicle engine is also used as a high-end engine
In some cases, there is a problem
Will be resolved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a mechanical governor of a diesel engine according to the present invention.

FIG. 2 is a sectional view showing a specific configuration of a set pressure switching means of FIG.

FIG. 3 is a sectional view showing a modification of the set pressure switching means.

[Explanation of symbols]

 Reference Signs List 1 accelerator pedal 2 control cable 3 speed lever 4 fork lever 5 swing support 6 swing support 7 control rack 8 intermediate link 9 fly weight shifter 10 fly weight 11 idle spring 12 swing support 13 main spring 13a outer spring 13b inner spring 14 Spring shaft 15 Set pressure switching lever 16 Cam 17 Spring 18 Cam follower 19 Stopper 20 Spring receiver 21 Pin 22 Bracket 23 Flange 24 Governor body 25 Actuator 26 Clearance

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02D 1/00-1/18 F02D 31/00 301

Claims (1)

(57) [Claims] 1. A speed lever which is manually pivoted, a fork lever having an intermediate portion pivotally connected to the tip of the speed lever and one end of which is connected to a control rack of a fuel injection pump, A fly weight shifter slidably controlled by a fly weight that generates a corresponding centrifugal force, an intermediate link that connects the fly weight shifter and the other end of the fork lever, and a main spring that oscillates and biases the intermediate link. The angle of the fork lever, which changes in response to the position of the speed lever, is corrected by the balance effect of the centrifugal force of the fly weight acting on the intermediate link via the fly weight shifter and the biasing force of the main spring, and the Diesel engine mechanical governor with optimal position and fuel supply control by correcting position A mechanical governor for a diesel engine, further comprising a set pressure switching means for switching and controlling the set pressure of the main spring in response to an operation mode of the engine.