KR101627048B1 - Apparatus and method for controlling a governor - Google Patents

Abstract

According to the present invention, when an abnormality of an engine control unit (ECU) is detected, a governor is controlled to gradually reduce the amount of fuel flowing into the engine to cool down the engine. According to the present invention, it is possible to safely stop the engine in the event of an ECU abnormality, thereby improving the stability and the durability of the engine. Further, due to malfunctions caused by wiring errors, defects in the product itself, It is possible to prevent the stopping operation from being normally performed, and the stability can be improved.

Description

[0001] Apparatus and method for controlling a governor [0002]

The present invention relates to a governor control apparatus and method, and more particularly, to a governor control apparatus and method that control a governor to stop an engine when an abnormality of an ECU (Engine Control Unit) is detected.

In general, two or more ECUs are redundantly used in order to prepare for sudden failure or malfunction of ECU (Engine Control Unit).

The first ECU 11 and the second ECU 12 are separated from each other and the first ECU 11 is configured as a control module and the second ECU 12 is configured as a safety module safety module, and they are connected to each other via wires and communication lines to exchange data. When the first ECU 11 operates normally, the first ECU 11, which is a control module, controls the governor 30 via the switch module 20 to adjust the injection amount of the flown into the engine. On the other hand, when the first ECU 11 malfunctions or abnormality occurs, the second ECU 12, which is a safety module, controls the governor 30 via the switch module 20 to shut down the engine. At this time, the second ECU 12 sends a signal to the switch module 20 to change the path of the control signal provided to the governor 30. Here, the engine emergency stop system injects compressed air of 3 to 10 bar into a fuel rack of a fuel pump into which the fuel is injected, thereby preventing the fuel rack from moving, The engine is stopped by emergency stop.

Such an emergency stop system can mechanically and electrically operate a solenoid valve for controlling the compressed air to stop the engine urgently, but has a problem of increasing the mechanical load on the engine. In particular, by forcibly stopping the engine by using compressed air without considering the characteristics of the engine such as the marine engine, the land engine, the propulsion engine, the engine for power generation, etc. and the environment in which the engine operates, the crankshaft, mechanical load / impact is applied to the parts of the engine driving parts such as the camshaft, which causes a problem of durability deterioration. In addition, repeated engine emergency stop increases the fatigue strength of cylinders, pistons, fuel racks, etc. in addition to the parts of the engine drive parts, thereby deteriorating the durability of the engine.

Japanese Patent Application Laid-Open No. 2004-162667 (Mitsubishi Industrial Co., Ltd.) 2004. 6. 10. Patent Document 1 is a marine engine control device, and Patent Document 1 discloses a marine engine control device for a marine engine control device including a main unit, The contents are disclosed. Korean Patent Publication No. 2006-0065051 (Doosan Infracore Co., Ltd.) 2006. 6. 14. Patent Document 2 is an electronic governor. Patent Document 2 discloses an electronic governor including a magnetic pickup sensor, a D-flip- The contents about you are disclosed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a non-CPU switching circuit for controlling a governor when an abnormality of an engine control unit (ECU) is detected, And to provide a governor control device and method for causing a cool down stop.

According to an aspect of the present invention, there is provided a governor control apparatus including: a memory unit for storing engine stop logic for controlling a governor to gradually reduce an amount of fuel flowing into an engine; A detector for detecting an abnormality in the ECU based on a signal received from an ECU (Engine Control Unit); And a control unit for measuring a revolution per minute (RPM) of the engine when the abnormality of the ECU is detected through the detection unit, and for outputting a control signal for determining whether the engine is in an emergency stop based on the measured RPM measurement value and a predetermined RPM reference value, And the engine stop logic is activated or deactivated according to the control signal output from the trigger circuit section.

The engine stop logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount into the engine in accordance with a predetermined time interval so that the amount of fuel flowing into the engine does not finally exist, It can be logic that stops.

The engine stop logic may be logic to further introduce compressed air into the engine.

If the control signal is a High signal, the engine stop logic is activated, and if the control signal is a Low signal, the engine stop logic may not be activated.

The trigger circuit unit includes: a sensing module for measuring an RPM of the engine; A converter module for converting the measured RPM value measured through the sensing module into a first voltage signal and outputting the first voltage signal; A first comparator module receiving a second voltage signal according to the RPM reference value and the first voltage signal and outputting a third voltage signal based on the second voltage signal and the first voltage signal; A second comparator module receiving a fourth voltage signal having a voltage of 0V and the first voltage signal as inputs and outputting a fifth voltage signal based on the fourth voltage signal and the first voltage signal; The third voltage signal is input through the J input port, the fifth voltage signal is input through the K input port frame, the third voltage signal input to the J input port, and the third voltage signal input to the K input port, A JK flip-flop module for outputting a sixth voltage signal based on the fifth voltage signal; And an AND gate module receiving the sixth voltage signal and the third voltage signal and outputting the control signal based on the sixth voltage signal and the third voltage signal.

According to another aspect of the present invention, there is provided a governor control method comprising: detecting an abnormality in the ECU based on a signal received from an ECU; Measuring an RPM of the engine when an abnormality of the ECU is detected; And outputting a control signal for determining whether or not the engine is to be stopped to an emergency stop based on the measured RPM measurement value and a predetermined RPM reference value to a memory section storing engine stop logic for controlling the governor to reduce the amount of fuel flowing into the engine stepwise; Wherein the engine stop logic is activated according to the control signal.

The engine stop logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount into the engine in accordance with a predetermined time interval so that the amount of fuel flowing into the engine does not finally exist, It can be logic that stops.

The engine stop logic may be logic to further introduce compressed air into the engine.

If the control signal is a High signal, the engine stop logic is activated, and if the control signal is a Low signal, the engine stop logic may not be activated.

The control signal outputting step may include: converting the measured RPM measurement value into a first voltage signal; Outputting a third voltage signal based on the second voltage signal according to the RPM reference value and the first voltage signal; Outputting a fourth voltage signal having a voltage of 0V and a fifth voltage signal based on the first voltage signal; Outputting a sixth voltage signal based on the third voltage signal input to the J input port of the JK flip flop module and the fifth voltage signal input to the K input port of the JK flip flop module; And outputting the control signal based on the sixth voltage signal and the third voltage signal.

According to the governor control apparatus and method of the present invention, when an abnormality of an ECU (Engine Control Unit) is detected, a governor is controlled through a non-CPU switching circuit to gradually reduce the amount of fuel flowing into the engine, The engine can be stopped safely in the event of an abnormality in the ECU, thereby improving the stability and the durability of the engine.

In addition, by stopping the engine cool-down through a non-CPU switching circuit that is not included in the switching module, it is possible to prevent malfunction due to wiring errors, product defects, program bugs, It is possible to prevent the engine stopping operation from being performed normally, thereby improving the stability.

1 is a block diagram for explaining a conventional engine control duplication system.
2 is a block diagram illustrating a governor control apparatus according to an embodiment of the present invention.
3 is a block diagram for explaining the governor control apparatus shown in FIG. 2 in more detail.
Fig. 4 is a diagram for explaining an example of the trigger circuit section shown in Fig. 3;
5 is a diagram for explaining the operation of the trigger circuit portion shown in Fig.
6 is a block diagram for explaining a governor control apparatus according to another embodiment of the present invention.
7 is a flowchart illustrating a governor control method according to a preferred embodiment of the present invention.
8 is a flowchart for explaining the control signal output step shown in Fig. 7 in more detail.
9 is a flowchart for explaining the engine stop logic activation determination step shown in FIG. 7 in more detail.

Hereinafter, preferred embodiments of the governor control apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings.

First, a governor control apparatus according to an embodiment of the present invention will be described with reference to FIG.

2 is a block diagram illustrating a governor control apparatus according to an embodiment of the present invention.

2, the governor control apparatus 100 according to the present invention is connected to an ECU (Engine Control Unit) 200 and can control a governor 400 through a switch module 300.

That is, when an abnormality of the ECU 200 is detected, the governor control device 100 controls the governor 400 through the non-CPU switching circuit to gradually reduce the amount of fuel flowing into the engine, cool down stop. At this time, the governor control device 100 can change the signal transmission path by controlling the switch module 300 (indicated by a dotted line in FIG. 2) so that a signal for controlling the governor 400 can be transmitted to the governor 400 . For example, when the ECU 200 operates normally, the switch module 300 transmits the control signal of the governor 400, which is transmitted from the ECU 200, to the governor 400. The switch module 300 transmits a control signal of the governor 400 transmitted from the governor control device 100 to the governor 400. In this case,

The governor control apparatus according to an embodiment of the present invention will now be described in detail with reference to FIG.

3 is a block diagram for explaining the governor control apparatus shown in FIG. 2 in more detail.

3, the governor control apparatus 100 may include a detection unit 110, a trigger circuit unit 130, and a memory unit 150. [

The memory unit 150 stores engine stop logic. Here, the engine stop logic refers to the logic that controls the governor 400 to gradually reduce the amount of fuel flowing into the engine.

At this time, the engine stopping logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount repeatedly in accordance with a predetermined time interval, and eventually terminates the engine because the amount of fuel flowing into the engine does not exist. Lt; / RTI > For example, if it is assumed that the amount of fuel flowing into the engine before the engine stop logic is activated is " 20 ", the engine stopping logic inputs the fuel amount 10 into the engine for the first & The amount of fuel flowing into the engine is set to '0', and the engine finally cools down.

In addition, the engine stop logic may be logic that additionally supplies compressed air to the engine. For example, the engine stop logic can additionally supply compressed air to the engine in addition to the operation of stepwise reducing the amount of fuel flowing into the engine.

The engine stop logic may be activated or deactivated according to a control signal output from the trigger circuit unit 130 and input to the memory unit 150. That is, when the control signal output from the trigger circuit unit 130 and input to the memory unit 150 is the High signal, the engine stop logic stored in the memory unit 150 is activated. On the other hand, if the control signal output from the trigger circuit unit 130 and input to the memory unit 150 is a Low signal, the engine stop logic stored in the memory unit 150 is not activated. Accordingly, when the control signal outputted from the trigger circuit unit 130 is a High signal, the memory unit 150 activates the pre-stored engine stop logic, and the amount of fuel flowing into the engine in accordance with the activated engine stop logic is stepped up And controls the governor 400 to cool down the engine.

The detection unit 110 detects the abnormality of the ECU 200 based on the signal received from the ECU 200. [ At this time, the detection unit 110 may be connected to the ECU 200 via an RS485 bus, a CAN bus, or the like. Of course, the detection unit 110 may detect the abnormality of the ECU 200 using the signal received from the ECU 200, but may detect the abnormality of the ECU 200 when the abnormality of the ECU 200 occurs It is possible to detect the abnormality of the ECU 200 by receiving the input.

The trigger circuit unit 130 measures an RPM (revolution per minute) of the engine when an abnormality of the ECU 200 is detected through the detection unit 110. [ The trigger circuit unit 130 outputs a control signal to the memory unit 150 on the basis of the measured RPM measurement value and the predetermined RPM reference value to determine whether or not the engine is in an emergency stop state. That is, if the measured RPM measurement value is larger than the predetermined RPM reference value, the trigger circuit unit 130 may output a control signal that is a High signal to the memory unit 150 in order to stop the engine from cooling down. On the other hand, if the measured RPM measurement value is smaller than the predetermined RPM reference value, the trigger circuit unit 130 can output a Low signal as a control signal.

Here, the preset RPM reference value may vary depending on the characteristics of the engine. For example, the engine characteristic refers to a rated RPM or the like. For example, the RPM reference value may be set to '690' if the rated RPM of the medium speed engine generator of 12 pole 60 Hz is' 600 RPM 'and the over speed limit value of the engine is '15%'.

Generally, a diesel generator type combined with an engine and a generator is referred to as a 'Gen-set'. A gen-set has a rated RPM according to a generator characteristic, and a rated RPM can be calculated according to the following equation (1) .

For example, for a 10-pole generator, 60Hz has a rated RPM of 720 and 50Hz has a rated RPM of 600. At this time, for the safety of the generator, over speed is specified when the rated RPM exceeds 15%, and forced stop is executed when exceeding it.

Thus, when an abnormality of the ECU 200 is detected, the governor 400 is controlled through the non-CPU switching circuit to reduce the amount of fuel flowing into the engine step by step to cool down the engine, In the event of an ECU failure, the engine can be safely stopped, which improves stability and durability of the engine. In addition, by stopping the engine cool-down through a non-CPU switching circuit that does not include a CPU, the engine stop operation can be normally performed due to a malfunction caused by wiring errors, defective products, program bugs, Can be prevented from being performed and the stability can be improved.

An example of the trigger circuit according to an embodiment of the present invention will now be described with reference to Figs. 4 and 5. Fig.

Fig. 4 is a diagram for explaining an example of the trigger circuit section shown in Fig. 3, and Fig. 5 is a diagram for explaining the operation of the trigger circuit section shown in Fig.

4, the trigger circuit unit 130 includes a sensing module 131, a converter module 132, a first comparator module 133b, a second comparator module 133a, a negative circuit module 134, a JK flip- Module 135 and an AND gate module 136. [0035]

The sensing module 131 measures the RPM of the engine. That is, the sensing module 131 can measure the RPM of the engine through a pick-up sensor (not shown).

The converter module 132 converts the measured RPM value measured through the sensing module 131 into a first voltage signal and outputs the first voltage signal. That is, the converter module 132 converts the frequency signal (measured value of the RPM) into a first voltage signal and then provides it to the first and second comparator modules 133b and 133a.

The first comparator module 133b receives the second voltage signal Vm according to the predetermined RPM reference value and the first voltage signal Vp provided from the converter module 132 and outputs the second voltage signal Vm And outputs the third voltage signal based on the first voltage signal Vp. 4, the second voltage signal Vm is 2.5 V, which is a voltage according to the RPM reference value when the preset RPM reference value is 700, and when the RPM reference value is changed, (Vm) can also be changed.

The second comparator module 133a receives the fourth voltage signal Vn of 0V according to 0 RPM and the first voltage signal Vp supplied from the converter module 132 and outputs the fourth voltage signal Vn, And outputs a fifth voltage signal based on the first voltage signal Vp.

It is possible to determine whether the measured RPM value is larger or smaller than the predetermined RPM reference value through the first and second comparator modules 133b and 133a.

The negative circuit module 134 inverts the phase of the fifth voltage signal output from the second comparator module 133a and transmits the inverted phase to the JK flip-flop module 135. [ That is, when the fifth voltage signal output from the second comparator module 133a is a High signal, the negative circuit module 134 transfers the fifth voltage signal as the low signal to the JK flip-flop module 135. [ On the other hand, if the fifth voltage signal outputted from the second comparator module 133a is a Low signal, the negative circuit module 134 transfers the fifth voltage signal as a High signal to the JK flip-flop module 135. [

The JK flip flop module 135 receives the third voltage signal transmitted from the first comparator module 133b through the J input port and receives the third voltage signal transmitted from the second comparator module 133a through the negative circuit module 134 5 voltage signal is input through the K input port.

The JK flip-flop module 135 outputs the sixth voltage signal based on the third voltage signal input to the J input port and the fifth voltage signal input to the K input port. That is, the JK flip-flop module 135 outputs the sixth voltage signal according to the input third and fifth voltage signals as shown in [Table 1] below.

Port J

Port K

The port Q (t + 1)

Explanation

0

0

Q (t)

Stay current

0

One

0

0 is output (reset)

One

0

One

Output 1 (set)

One

One

/ Q (t)

Current state reversal

The AND gate module 136 receives the sixth voltage signal transmitted from the JK flip flop module 135 and the third voltage signal transmitted from the first comparator module 133b.

Based on the sixth voltage signal and the third voltage signal, a control signal is output as shown in Table 2 below.

The sixth voltage signal

The third voltage signal

Control signal

0

0

0

0

One

0

One

0

0

One

One

One

5, changes in control signals output from the trigger circuit unit 130 to the memory unit 150 are shown in Table 3 below, assuming that the RPM measurement value changes. Here, the RPM reference value BV shown in FIG. 5 is set to '700' RPM.

section

The output of the second comparator module
Port K

The output of the first comparator module
Port J

Q (t + 1)

Control signal

P1

0

One

0

0

0

0

P2

One

0
0

0

0

0

P3

One

0

One

One

One

One

P4

One

0

0

0

One

0

P5

One

0

One

One

One

One

P6

One

0

0
0

One

0

P7

0

One
0

0

0

0

The governor control apparatus according to another embodiment of the present invention will now be described with reference to FIG.

6 is a block diagram for explaining a governor control apparatus according to another embodiment of the present invention.

Since the governor control apparatus 100 according to the present embodiment is substantially the same as the governor control apparatus 100 according to the previous embodiment, only the differences from the preceding embodiment will be described below.

Referring to FIG. 6, the governor control apparatus 100 according to the present embodiment can be applied to an ECU redundancy system.

That is, the first ECU 200-1 and the second ECU 200-2 are separated from each other, the first ECU 200-1 is configured as a control module, the second ECU 200-2 is configured as a safety And a module (safety module), which are connected to each other via wires and communication lines to exchange data. The governor control apparatus 100 according to the present embodiment may be connected to the second ECU 200-2.

The governor control device 100 according to the present embodiment controls the governor 400 through the non-CPU swing circuit to detect the abnormality of the engine 200 when the abnormality of both the first ECU 200-1 and the second ECU 200-2 is detected, The amount of fuel flowing into the engine can be reduced stepwise to cool down the engine.

The governor control device 100 controls the first switch module 300-1 and the second switch module 300-2 so that a signal for controlling the governor 400 can be transmitted to the governor 400. In this case, 6) to change the signal transmission path. For example, when all of the first and second ECUs 200-1 and 200-2 operate normally, the first and second switch modules 300-1 and 300-2 are transmitted from the first ECU 200-1 And transmits the control signal of the governor 400 to the governor 400. When only the second ECU 200-2 operates normally, the first and second switch modules 300-1 and 300-2 receive the control signal of the governor 400 transmitted from the second ECU 200-2 To the governor (400). On the other hand, when the first and second ECUs 200-1 and 200-2 are entirely failed or abnormal, the first and second switch modules 300-1 and 300-2 are connected to the governor control device 100, And transmits the control signal of the governor 400, which is transmitted from the governor 400, to the governor 400.

A governor control method according to a preferred embodiment of the present invention will now be described with reference to FIGS.

7 is a flowchart illustrating a governor control method according to a preferred embodiment of the present invention.

Referring to Fig. 7, the governor control apparatus 100 detects an abnormality in the ECU 200 based on a signal received from the ECU 200 (S110).

When the abnormality of the ECU 200 is detected (S130-Y), the governor control device 100 measures the RPM of the engine (S150).

Thereafter, the governor control apparatus 100 outputs a control signal indicating whether or not the engine is to be stopped, based on the measured RPM measurement value and the predetermined RPM reference value (S170). Here, the predetermined RPM reference value may vary depending on the engine characteristics such as the rated RPM and the like.

That is, if the measured RPM measurement value is larger than the predetermined RPM reference value, the governor control device 100 may output a control signal which is a High signal to activate the engine stop logic previously stored to cool down the engine. On the other hand, if the measured RPM measurement value is smaller than the predetermined RPM reference value, the governor control device 100 can output a Low signal as a control signal.

Then, the governor control device 100 determines whether to activate the engine stop logic according to the control signal (S190). Here, the engine stop logic refers to the logic that controls the governor 400 to gradually reduce the amount of fuel flowing into the engine. At this time, the engine stopping logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount repeatedly in accordance with a predetermined time interval, and eventually terminates the engine because the amount of fuel flowing into the engine does not exist. Lt; / RTI > In addition, the engine stop logic may be logic that additionally supplies compressed air to the engine.

8 is a flowchart for explaining the control signal output step shown in Fig. 7 in more detail.

Referring to FIG. 8, the governor control apparatus 100 converts the measured RPM measurement value into a first voltage signal (S171).

The governor control device 100 outputs the third voltage signal based on the second voltage signal and the first voltage signal according to the RPM reference value (S173). In addition, the governor control apparatus 100 outputs the fifth voltage signal based on the fourth voltage signal and the first voltage signal of 0V according to 0 RPM (S175).

Then, the governor control apparatus 100 controls the third voltage signal input to the J input port of the JK flip-flop and the fifth voltage signal input to the K input port of the JK flip-flop via the negative circuit, (S177).

Thereafter, the governor control device 100 outputs a control signal based on the sixth voltage signal and the third voltage signal (S179).

9 is a flowchart for explaining the engine stop logic activation determination step shown in FIG. 7 in more detail.

Referring to FIG. 9, if the control signal is a High signal (S191-Y), the governor control device 100 activates the previously stored engine stop logic (S193). Then, the governor 400 is controlled according to the engine stop logic, and the engine cools down and stops.

On the other hand, if the control signal is a Low signal (S191-N), the governor control device 100 does not activate the previously stored engine stop logic.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the appended claims.

100: governor control device, 110: detection part,
130: trigger circuit section, 131: sensing module,
132: converter module, 133a, 133b: comparator module,
134: Negative circuit module, 135: JK flip flop module,
136: end gate module, 150: memory part,
200: ECU, 300: switch module,
400: governor

Claims (10)

A memory unit for storing engine stop logic for controlling a governor so as to gradually reduce the amount of fuel flowing into the engine;
A detector for detecting an abnormality in the ECU based on a signal received from an ECU (Engine Control Unit); And
And a control unit that measures a revolution per minute (RPM) of the engine when the abnormality of the ECU is detected through the detection unit, and outputs a control signal to the memory unit, based on the measured RPM measurement value and a predetermined RPM reference value, A trigger circuit section for outputting the trigger signal;
/ RTI >
The engine stop logic determines whether or not to activate according to the control signal output from the trigger circuit section,
The trigger circuit section,
A sensing module for measuring an RPM of the engine;
A converter module for converting the measured RPM value measured through the sensing module into a first voltage signal and outputting the first voltage signal;
A first comparator module receiving a second voltage signal according to the RPM reference value and the first voltage signal and outputting a third voltage signal based on the second voltage signal and the first voltage signal;
A second comparator module receiving a fourth voltage signal having a voltage of 0V and the first voltage signal as inputs and outputting a fifth voltage signal based on the fourth voltage signal and the first voltage signal;
The third voltage signal is input through the J input port, the fifth voltage signal is input through the K input port frame, the third voltage signal input to the J input port, and the third voltage signal input to the K input port, A JK flip-flop module for outputting a sixth voltage signal based on the fifth voltage signal; And
An AND gate module receiving the sixth voltage signal and the third voltage signal and outputting the control signal based on the sixth voltage signal and the third voltage signal;
And the governor control device. The method of claim 1,
The engine stop logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount into the engine in accordance with a predetermined time interval so that the amount of fuel flowing into the engine does not finally exist, A governor control device which is a logic to be stopped. 3. The method of claim 2,
Wherein the engine stop logic is logic for further adding compressed air to the engine. The method of claim 1,
Wherein the engine stopping logic is activated when the control signal is a High signal and the engine stopping logic is not activated when the control signal is a Low signal. delete Detecting an abnormality in the ECU based on a signal received from the ECU;
Measuring an RPM of the engine when an abnormality of the ECU is detected; And
Outputting a control signal for determining whether or not the engine is to be stopped to an engine stop based on the measured RPM measurement value and a preset RPM reference value to a memory unit storing engine stop logic for controlling the governor so as to reduce the amount of fuel flowing into the engine step by step;
/ RTI >
The engine stop logic determines whether to activate according to the control signal,
The control signal outputting step includes:
Converting the measured RPM measurement value into a first voltage signal;
Outputting a third voltage signal based on the second voltage signal according to the RPM reference value and the first voltage signal;
Outputting a fourth voltage signal having a voltage of 0V and a fifth voltage signal based on the first voltage signal;
Outputting a sixth voltage signal based on the third voltage signal input to the J input port of the JK flip flop module and the fifth voltage signal input to the K input port of the JK flip flop module; And
Outputting the control signal based on the sixth voltage signal and the third voltage signal;
. The method of claim 6,
The engine stop logic repeatedly performs an operation of injecting a fuel amount smaller than the immediately preceding input fuel amount into the engine in accordance with a predetermined time interval so that the amount of fuel flowing into the engine does not finally exist, A governor control method which is a logic that is stopped. 8. The method of claim 7,
Wherein the engine stop logic is logic that further applies compressed air to the engine. The method of claim 6,
Wherein the engine stop logic is activated when the control signal is a High signal and the engine stop logic is not activated when the control signal is a Low signal. delete

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