JP3124084B2 - Engine speed and clutch control system for two-axle single-axle ship - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to an engine speed and clutch control device for a two-engine single-shaft ship that is switched to shaft operation.

[0002]

2. Description of the Related Art FIG. 6 shows a flow of operation of a conventional two-machine one-axis ship. Conventionally, in order to switch from the two-machine one-axis operation state to the one-machine one-axis operation, when one clutch is to be "de-asserted", the engine speeds of the two machines are once reduced to idling,
The clutch was "de-asserted", and the number of revolutions was increased again by one shaft per machine, and operation was performed.

[0003]

Conventionally, clutches
In the “fit” and “detach” operations, two engines operate
If one of the clutches is taken off during a roll, the remaining engine
Overload due to the sudden load of two engines
Become. On the other hand, in a disconnected engine,
The ratchet "remove" suddenly reduces the load and the engine
There was a risk of overspeeding the number of turns. Therefore, in order to prevent erroneous operation by the driver, usually, the clutches “fit” and “detach”
The operation is provided with an interlock that enables the engine speed only when idling, but if you want to switch from two-engine operation to one-engine operation during navigation, you must temporarily reduce the propeller rotation to idling. However, there has been a problem that the speed of the boat is lowered and smooth navigation is hindered.

The present invention has been made in view of the above problems, and has as its object the purpose of achieving prevention of erroneous operation by a driver, prevention of overload and overspeed of an engine, and smooth navigation. Another object of the present invention is to provide an engine speed and clutch control device for a two-engine single-screw ship.

[0005]

SUMMARY OF THE INVENTION The two-engine, single-shaft ship of the present invention has the following features.
The engine rotation speed and clutch control device are two-machine one-axis operation and one
In the two-engine one-axis ship which is switched to the single-engine operation, the engine speed signals detected by the two engine speed detectors are compared with a preset engine speed, and the two engines are operated together. An operating state determining unit that determines whether or not the two clutches are in a "fitting" state based on a clutch fitting / disengaging position signal detected by the two clutch position detectors. When the determining unit, the operating state determining unit and the clutch state determining unit determine that the two engines are in the operating state, the engine speed signals of the two engines are set in advance based on the propeller absorption horsepower characteristics. Operating range for determining whether or not it is within the operating range of one engine by comparing the rotation speed at which one engine can be operated.
And an operation determination unit.
Judging that the output during rotation cannot be covered by one engine output
When the two units are in operation,
After lowering the engine speed, the two
It is characterized by switching to single-axis operation of the machine.

Further, the engine rotation of the two-engine single-screw ship of the present invention is also described.
Number, clutch control device, two-machine one-axis operation and one-machine one-axis operation
In the two-engine single-axis ship, the engine speed signals detected by the two engine speed detectors are compared with a preset speed to determine whether the two engines are operating together. An operating state determining unit for determining, and a clutch state determining unit for determining whether the two clutches are both in the “fitted” state based on the clutch engagement / disengagement signal detected by the two clutch position detectors; One engine in which the engine speed signals of the two engines are set in advance based on the propeller absorption horsepower characteristics when the operating state determining unit and the clutch state determining unit determine that the two engines are in the operating state. An operating range determining unit that determines whether the engine speed is within the operating range of one engine by comparing the operating speed with the operable rotational speed; 2 until the number of rotations set in advance
A rotation speed instruction signal to the engine governor of the machine
A single-unit operation speed instruction signal conversion unit and a speed instruction signal value in which the speed is further reduced by a preset ratio with respect to the governor of the engine connected to one clutch that is to be decoupled. , And outputs the result to the governor .
To the clutch hydraulic switching valve
The output signal of the clutch operation signal and the
Preset for the engine connected to the latch
Eye that outputs idle speed to engine governor
And a dollar rotation speed instruction signal conversion unit, which determines the operation range.
The output during operation of the two engines is
When it is judged that it cannot be fulfilled, this result is
Input to the number instruction signal conversion unit, and the one-unit operation speed instruction signal
One operation time within the one operation range output from the conversion unit
Reduce the engine speed for both engines while operating
After that, switch from the two-machine single-axis operation to the one-machine single-axis operation
The feature is that it is obtained.

[0007]

The engine speed and clutch control device of the two-engine single-shaft ship according to the present invention is constructed as described above, and performs the following operations. That is, (1) After confirming that the two units are operating in one axis,
Measure the engine speed at the time. Two engines
The actual propeller load on the propeller
Characteristics related to the load and engine speed
By obtaining the propeller absorption horsepower characteristics in advance,
Can be estimated from the engine speed. Therefore, one engine
Stop the gin and run the remaining one engine.
Whether or not the output can be determined based on the measured rotation speed
it can. If one clutch is deactivated while the load cannot be covered by one engine, the remaining engines suddenly become overloaded, and the deactivated engine suddenly becomes unloaded. In order to prevent this from occurring, excessive rotation is performed as follows. (2) The rotation speeds of the two engines are both reduced to a rotation speed corresponding to the load that can be covered by one engine. At this point, the load of one engine is divided into two by the two engines, and the load is shared. (3) Next, by utilizing the governor droop characteristic, the entire load is moved to one engine from the state where the load of one engine is shared by two engines.
A low speed command for the speed droop is issued to the governor of the machine engine. (4) Thereby, one engine is in a full load state, and the remaining one engine is in a no-load state. Next, the clutch of this engine is turned off. (5) After the clutch is "disengaged", the rotational speed is reduced to the idle rotational speed.

As described above, it is possible to smoothly switch from the two-machine single-axis operation to the one-machine single-axis operation without causing overload and overspeed of the engine.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the engine speed of the two-engine single-screw ship of the present invention will be described.
The clutch control device will be described with reference to an embodiment shown in FIGS. 1 shows the overall configuration, FIG. 2 shows a shaft system of a two-engine single-screw ship, FIG. 3 shows a flow chart, FIG. 4 shows a control block diagram, and FIG. 5 shows a propeller It shows absorption horsepower characteristics.

FIG. 1 and FIG. 1 clutch fit
NO. 2 is a clutch engagement / disengagement detector, 3 is NO. No. 1 engine speed detector, 4 NO. 2
An engine speed detector, 5 is a clutch state determination unit, 6 is an engine operation state determination unit, and 7 is an idle speed storage unit. Reference numeral 8 denotes a two-machine one-axis operation determination unit, 9 denotes a one-machine operable rotation speed comparison unit, 10 denotes a one-machine operable condition storage unit, 11 denotes a clutch operation signal conversion unit, 12 denotes an idle rotation speed instruction signal conversion unit, and 13 Denotes a single-machine operation speed instruction signal conversion unit, 14 denotes a reduced rotation speed calculation unit, and 15 denotes a rotation speed reduction rate storage unit.

16 is NO. 1 clutch switching valve, 17 is N
O. 2 clutch switching valve, 18 is NO. 1 engine governor, 19 is NO. It is a two-engine governor. Next, the operation of the engine speed and the clutch control device of the two-machine single-shaft ship shown in FIGS. 1 to 5 will be specifically described. (1) NO. 1 engine speed detector 3 and NO. (2) The rotation speed signals N1 and N2 from the engine rotation speed detector are output to the engine operation state determination unit 6, where they are compared with the value [N idle] set in the idle rotation speed storage unit 7, and the operation is performed. Determine the status. (2) NO. 1 clutch engagement / disengagement position detector 1 and NO.
The signals C1 and C2 from the two-clutch engagement / disengagement position detector 2 are input to a clutch state determination section 5, where the clutch state is determined. (3) The judgment results of the engine operation state judgment unit 6 and the clutch state judgment unit 5 are output to the two-machine one-axis operation judgment unit 8 to judge whether or not the two-machine one-axis operation state. (4) The determination result of the two-machine one-axis operation determination unit 8 is output to the one-machine operable range rotation speed comparison unit 9, which is set in advance in the one-machine operable condition storage unit 10 from the propeller absorption horsepower characteristic. The number of rotations [N1] is compared with the number of rotations, and it is determined whether the rotation during the operation of the two units can be covered by the operation of the single unit. (5) The above determination result is input to the single-unit operation speed instruction signal conversion unit 13, from which the NO. 1 engine governor 18 and NO. One engine rotation speed [N1
Is output. The result of the above judgment is not covered by single machine operation
Propeller that can be covered by one machine operation
Until the load is reached, the two engines run
Automatically lower turns. As a result, the two-machine one-axis operation state
The engine speed drops to the operating speed for one
The engine output of one engine is 5
This means that it is sharing 0%. (6) The governor of the engine whose load is to be reduced to zero by utilizing the droop characteristic of the engine governor in order to move all the load shared by the engine to be stopped to another engine. , The rotation speed N ′ obtained by the reduced rotation speed calculation unit 14 and the rotation speed reduction rate storage unit 15 is instructed. (7) The clutch operation signal converter 11 outputs an instruction to release the clutch to the clutch switching valve with respect to the clutch of the engine that has become unloaded due to the movement of the load, thereby deactivating the clutch. (8) After declutching, idle speed instruction signal converter 1
2 to the engine governor 18 at idle speed [N
Idle] is output.

By the above flow, the switching from the two-machine one-axis operation state to the one-machine one-axis operation is performed, and one engine is operated at the maximum output speed of one engine on the propeller absorption horsepower characteristic. One of the engines enters an idling operation state by "clutching".

[0013]

According to the present invention, the engine rotation speed of the two-engine single-screw ship,
As described above, the clutch control device is switched from one-axis operation of two machines to one
Since the switching to the single-axis operation is automatically performed, the erroneous operation of the driver, the overload of the engine, and the overspeed can be prevented, and smooth navigation can be performed.

Further, as described above, one machine is operated from two machines and one axis,
Since the switching to the one-axis operation is automatically performed, the operation of the driver becomes easy. In addition, since it is not necessary to lower the two engines to idle operation at the time of switching, the operation can be smoothly switched from two to one during navigation.

[Brief description of the drawings]

FIG. 1 shows the engine speed of a two-engine single-axle ship according to the present invention;
FIG. 2 is a system diagram illustrating an embodiment of a clutch control device.

FIG. 2 is an explanatory diagram showing a shaft system of a two-machine single-shaft ship.

FIG. 3 is a flow chart of the engine speed and clutch control device.

FIG. 4 is a control block diagram of the engine speed and clutch control device.

FIG. 5 is an explanatory diagram showing propeller absorption horsepower characteristics.

FIG. 6 is an explanatory diagram showing a flow of operation of a conventional two-machine single-axis ship.

[Explanation of symbols]

 1 NO. 1 Clutch fit / remove position detector 2 NO. 2 Clutch fit / remove position detector 3 NO. 1 engine speed detector 4 NO. 2 Engine speed detector 5 Clutch state determination unit 6 Engine operation state determination unit 7 Idle speed storage unit 8 2 unit 1-axis operation determination unit 9 1 unit operable speed comparison unit 10 1 unit operable condition storage unit 11 Clutch Operating signal conversion unit 12 Idle rotation speed instruction signal conversion unit 13 Single machine operation rotation speed instruction signal conversion unit 14 Reduced rotation speed calculation unit 15 Rotation speed reduction rate storage unit 16 NO. 1 clutch switching valve 17 NO. 2 clutch switching valve 18 NO. 1 engine governor 19 NO. 2-engine governor

Continuation of the front page (56) References JP-A-56-162239 (JP, A) JP-A-52-115929 (JP, A) JP-A-51-98890 (JP, A) JP-B-35-5402 (JP) , B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B63H 23/10 B63H 23/30

Claims (2)

(57) [Claims] An engine speed signal detected by two engine speed detectors of a two-machine one-axis ship that switches between two-machine one-axis operation and one-machine one-axis operation is set to a predetermined number of engine speeds. The operating state determination unit that determines whether the two engines are both operating by comparison and the clutch engagement / disengagement signal detected by the clutch position detectors of the two engines indicate that the two clutches are both engaged. A clutch state determining unit that determines whether the engine is in the operating state, and an engine speed of the two engines when the operating state determining unit and the clutch state determining unit determine that the two engines are operating. An operating range determining unit that compares the signal with an operating speed of one engine set in advance based on the propeller absorption horsepower characteristic to determine whether the operating speed is within the operating range of one engine.
The output during the operation of the two engines in the
When it is determined that the output cannot be met with the
After reducing the engine speed to within the operating range of
Switching from the two-machine single-axis operation to the one-machine single-axis operation
The engine speed and clutch of a two-engine single-screw ship
Control device. 2. An engine rotation speed signal detected by two engine rotation speed detectors in a two-engine single-axis ship that switches between two-machine single-axis operation and one-machine single-axis operation. The operating state determination unit that determines whether the two engines are both operating by comparison and the clutch engagement / disengagement signal detected by the clutch position detectors of the two engines indicate that the two clutches are both engaged. A clutch state determining unit that determines whether the engine is in the operating state, and an engine speed of the two engines when the operating state determining unit and the clutch state determining unit determine that the two engines are operating. An operating range determining unit that compares the signal with the operating speed of one engine set in advance based on the propeller absorption horsepower characteristic to determine whether the operating speed is within the operating range of one engine; The engine 1 machine drivable range preset to enter has been one-machine working rotational outputs a rotational speed instruction signal until the revolution speed with respect to the two aircraft engine governor
A number instruction signal conversion unit and a governor of an engine connected to one clutch to be decoupled calculate a rotational speed instruction signal value in which the rotational speed is further reduced by a preset ratio. Reduced rotation that outputs the result to the governor
Numerical operation unit and one clutch that is trying to "de-"
A clutch that outputs a clutch release command signal to the hydraulic switching valve
Connected to the switch for operation signal and the clutch that has been removed
Idle speed preset for the running engine
Idle speed finger that outputs the number to the engine governor
A signal conversion unit, and the operation range determination unit outputs the output during operation of two units to one unit.
When it is determined that the engine output cannot be met,
The single machine operation speed instruction signal is input to the
The one-unit operation range output from the rotation speed instruction signal conversion unit.
Engage with both engines running toward the single
After lowering the gin rotation speed, the two
Switching to single-axis operation
Engine speed, clutch control device.