JP2004137998A - Engine speed control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability in an engine speed control device equipped with an operation means changing an engine speed, a main operation detection means detecting an operation amount of the operation means, a means changing the engine speed, a means detecting a position of a speed change means, and a control means controlling these means. <P>SOLUTION: The device is provided with auxiliary throttle position sensors 56 (66) detecting the operation amount of the operation means, and equipped with two systems of control lines which are a first control line connecting a main throttle position sensor 17 with engine control devices 3 (4), and a second control line connecting the auxiliary throttle position sensors 56 (66) with the engine control devices 3 (4). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technology of an engine speed control device that controls the speed of an engine of an internal combustion engine mounted on a ship or the like.
[0002]
[Prior art]
An engine mounted on a ship or the like is provided with an engine speed control device for controlling the number of revolutions. The engine speed control device includes a remote control handle for raising and lowering the engine speed, and a remote control handle for the remote control handle. A main throttle position sensor for detecting a rotation operation amount, a throttle valve disposed in an intake path to an engine, a throttle opening sensor for detecting an opening of the throttle valve, and an actuator for opening and closing the throttle valve. The actuator is operated based on an operation amount detection signal from the main throttle position sensor and a valve opening detection signal from the throttle opening sensor.
In the steering station, these remote control handles, instruments for displaying the operating state of the engine, and the like can be arranged at appropriate locations according to the user's preference.
[0003]
[Patent Document 1]
JP-A-6-247387
[Problems to be solved by the invention]
By the way, if the control line between the engine speed control device and the main throttle position sensor is disconnected, the operation of the engine speed by the remote control handle becomes impossible. At this time, the control signal from the main throttle position sensor to the engine speed control device is interrupted, the throttle valve closes, and the engine speed drops to a low idle speed.
[0005]
In particular, in a ship or the like navigating at sea, such an uncontrollable state involves human lives. In view of the above, an object of the present invention is to improve the reliability of the engine speed control device.
[0006]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
First, an operation means for changing an engine speed, a main operation detecting means for detecting an operation amount of the operation means, a means for changing the engine speed, In an engine speed control device provided with a means for detecting the position of the change means and a control means for controlling the same, the operation means is constituted by a main operation means and an auxiliary operation means, and the respective operation amounts are detected by the detection means. Upon detection, when the main operation means is abnormal, the main operation means can be operated by the auxiliary operation means.
[0007]
Further, as set forth in claim 2, there is provided a judging means for judging an abnormality of the main operating means, and a switching means for automatically switching the auxiliary operating means to active when the judging means becomes abnormal.
[0008]
Further, as set forth in claim 3, there is provided a switching display section for displaying that the auxiliary operation means has been switched to active.
[0009]
Then, the switching display section is provided on the same circuit board as the means for detecting the operation amount of the auxiliary operation means.
[0010]
Further, when the engine speed is equal to or less than a preset speed while the main operation device is operated, the operation is switched to be operable by the auxiliary operation device.
[0011]
Further, the switching to the auxiliary operation means is performed when the auxiliary operation means is set to a low rotation speed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to an engine speed control device mounted on a ship.
Here, the following ship has a configuration in which two engines of a first engine and a second engine are mounted and two control stations of a main bridge and a fly bridge are provided. The number of arrangements is not particularly limited.
[0013]
FIG. 1 is a block diagram showing a control configuration of a rotation speed control device of an engine mounted on a ship. The ship has a main bridge provided in a cabin in the center of a hull, and a fly bridge provided on the cabin. There are two control stations, a master control unit is provided on the main bridge, and a slave control unit is provided on the fly bridge. Normally, control is performed on the main bridge and control is also performed on the fly bridge. Is configured to be possible.
[0014]
The master control unit includes an instrument 11 corresponding to the first engine, an instrument 12 corresponding to the second engine, and a throttle valve of the first engine and a throttle valve of the second engine. A remote control handle 13 for increasing and decreasing the number, a key switch panel 14 for starting and stopping the first engine, a key switch panel 15 for starting and stopping the second engine, and the like are arranged. , A meter 22 corresponding to the second engine, a remote control handle 23 for opening and closing the throttle valve of the first engine and the throttle valve of the second engine to raise and lower the rotation speed of each engine, Key switch panel 24 for starting and stopping the first engine, and key switch panel 2 for starting and stopping the second engine Etc. are arranged, these with each device and below the control device is communicably connected via a control line. In this embodiment, as a means for changing the engine speed, the throttle valve is opened / closed by an actuator such as a motor or a cylinder, but the present invention is not limited to this.
[0015]
The instruments 11 and 21 each include a tachometer, a hydraulic pressure meter, a coolant temperature meter, a fuel remaining meter, a propeller tachometer, and the like corresponding to the first engine, and the instruments 12 and 22 each correspond to a tachometer and a hydraulic pressure corresponding to the second engine. It is equipped with a meter, a cooling water temperature meter, a fuel remaining meter, a propeller tachometer, and the like.
[0016]
The remote control handles 13 and 23 as main operating means for changing the engine speed are provided with main throttle position sensors 17 and 27 as main detecting means for detecting the amount of turning operation of the handle in the main body, respectively. The main throttle position sensors 17 and 27 are connected to a first voltage detector 31 and a second voltage detector 41, respectively.
[0017]
The first voltage detector 31 includes the instruments 11, 12, 21, and 22, the key switch panels 14, 24, the first engine control device 3 that controls the operation of the first engine, and the first engine The second voltage detector 41 is connected to the first actuator 32 that opens and closes the throttle valve of the first embodiment and the checker 5 composed of a general-purpose notebook personal computer and the like. Key switch panels 15 and 25, a second engine control device 4 for controlling the operation of the second engine, a second actuator 42 for opening and closing a throttle valve of the second engine, and the checker 5 are connected to each other.
[0018]
The checker 5 is connected to the instruments 11, 12, 21 and 22, and is also connected to the first engine control device 3 and the second engine control device 4. The checker 5 has a serial interface. The serial interface converts serial data from each control device into parallel data, outputs the parallel data to the first engine control device 3 or the second engine control device 4, and performs first engine control. The parallel data from the device 3 or the second engine control device 4 is converted into serial data and output to each control device.
[0019]
The first engine control device 3 is connected to the key switch panel 14 of the main bridge and the key switch panel 24 of the fly bridge, respectively, and the second engine control device 4 is connected to the key switch panel 15 of the main bridge and the key switch panel of the fly bridge. They are connected to the switch panel 25, respectively.
[0020]
The main throttle position sensors 17 and 27 each have a potentiometer to detect the amount of rotation (rotational operation angle) of the remote control handles 13 and 23. Each of the valves is provided with a throttle opening sensor having a potentiometer for detecting the opening of the valve. When the main throttle position sensor 17 (or 27) is rotated by rotating the remote control handle 13 (or 23), a voltage signal proportional to the rotation angle is output via the first voltage detector 31 to the second voltage sensor. The output is output to the first engine control device 3 and to the second engine control device 4 via the second voltage detector 41.
[0021]
In the first engine control device 3, the operation angle detection signal of the remote control handle 13 (or 23) from the main throttle position sensor 17 (or 27), the valve opening / closing angle detection signal from the throttle opening sensor of the first engine, and , The first actuator 32 is operated to servo-control the throttle valve of the first engine to a predetermined opening degree, and the second engine control device 4 controls the throttle valve of the main engine from the main throttle position sensor 17 (or 27). The second actuator 42 is operated based on the operation angle detection signal of the remote control handle 13 (or 23) and the valve opening / closing angle detection signal from the throttle opening sensor of the second engine, and the throttle valve of the second engine is turned on. Servo control is performed to achieve a predetermined opening degree.
[0022]
The key switch panel 14 arranged on the main bridge includes a start key 57 for starting and stopping the first engine, a stop button 52 for urgently stopping the first engine, a battery lamp 53 for the first engine, and a An auxiliary throttle knob 54 serving as a corresponding auxiliary operation means, and a switching display lamp 55 which is lit and displayed when the auxiliary throttle knob 54 is switched to an operable state, are arranged inside the key switch panel 14. An auxiliary throttle position sensor 56 is incorporated as a means for detecting the amount of rotation of the auxiliary throttle knob 54 corresponding to the first engine.
[0023]
Similarly, the key switch panel 15 arranged on the main bridge includes a start key 61 for starting and stopping the second engine, a stop button 62 for urgently stopping the second engine, a battery lamp 63 for the second engine, An auxiliary throttle knob 64 corresponding to the second engine and a switching display lamp 65 which is turned on when the auxiliary throttle knob 64 is switched to an operable state are arranged, and the key switch panel 15 corresponds to the second engine. A built-in auxiliary throttle position sensor 66 is provided.
[0024]
The switching display lamps 55 and 65 are constituted by LEDs or the like, and the switching display lamp 55 (65) and the auxiliary throttle position sensor 56 (66) are mounted on the same circuit board. When the auxiliary throttle position sensor 56 (66) is switched to an active state in which the auxiliary throttle position sensor 56 (66) can be operated, the display lamp 55 (65) is illuminated in conjunction therewith.
[0025]
The auxiliary throttle position sensor 56 (66) is of a resistance volume type and is operated by the auxiliary throttle knob 54 (64). The control line connecting the auxiliary throttle position sensor 56 (66) and the engine control device 3 (4) is different from the control line connecting the main throttle position sensor 17 (27) and each engine control device 3.4. Wired independently.
[0026]
In other words, each of the engine controllers 3 and 4 is provided with two control lines to the main throttle position sensors 17 and 27 and the auxiliary throttle position sensors 56 and 66 so that the main throttle position sensors 17 and 27 should be used. When the remote controller handles 13 and 23 become inoperable due to disconnection of the control line between them and the like, the first engine is operated by operating the auxiliary throttle knobs 54 and 64 of the key switch panels 14 and 15 in the main bridge. , And the output speed of the second engine can be controlled. In this case, when the auxiliary throttle knob 54 (or 64) is turned to rotate the auxiliary throttle position sensor 56 (or 66), a voltage signal proportional to the rotation angle is output via the first voltage detector 31. The output is output to the first engine control device 3 and to the second engine control device 4 via the second voltage detector 41.
[0027]
In the first engine control device 3, an operation angle detection signal of the auxiliary throttle knob 54 (or 64) from the auxiliary throttle position sensor 56 (or 66) and a valve opening / closing angle detection signal from the throttle opening sensor of the first engine. Based on the above, the first actuator 32 is operated to servo-control the throttle valve of the first engine to a predetermined opening. In the second engine control device 4, the auxiliary throttle position sensor 56 (or 66) The second actuator 42 is operated based on the operation angle detection signal of the auxiliary throttle knob 54 (or 64) of the second engine and the opening / closing angle detection signal of the valve from the throttle opening sensor of the second engine. Servo control is performed so that the valve has a predetermined opening degree.
[0028]
On the other hand, the key switch panels 24 and 25 arranged on the fly bridge are simple types of the key switch panels 14 and 15 of the main bridge, and the key switch panel 24 has a start key 57 for starting and stopping the first engine. A stop button 58 for urgently stopping the first engine is arranged, and a start key 67 for starting and stopping the second engine and a stop button 68 for urgently stopping the second engine are arranged on the key switch panel 25. ing.
[0029]
Next, the engine control devices 3 and 4 will be described.
Each of the engine control devices 3 and 4 includes a central processing unit (CPU), a read-only memory (ROM) in which a predetermined control program and the like are stored in advance, and a random access memory (RAM) for temporarily storing calculation results of the CPU and the like. These units are communicably connected via a bus.
[0030]
A judgment program for judging an abnormality of the control line between the main throttle position sensor 17 and the engine control device 3 (or 4) is stored in the ROM of each of the engine control devices 3 and 4, respectively. At the time of the determination, a switching program for automatically switching the control line between the auxiliary throttle position sensor 17 or 27 and the engine control device 3 (or 4) to active is stored.
[0031]
In addition, from the viewpoint of safety, this switching program is executed when the auxiliary throttle position sensor 17 (27) and the engine control device 3 (4) are not set at a low rotation speed. And a subroutine program for prohibiting the switching of the control line to active between the above and the subroutine program serving as the switching prohibiting means.
[0032]
Further, the engine control devices 3 and 4 are also connected to a rotation speed sensor (not shown) which is a detecting means for detecting the rotation speed of the engine, and a determination program in the ROM of the engine control device 3 (or 4) is used. The engine speed detected by the speed sensor is compared with a preset low idle speed (speed during idling) to determine that the detected engine speed is equal to or lower than the low idle speed. When this happens, it is determined that an abnormality has occurred, a lighting instruction is output from the engine control device 3 (or 4) to the switching display lamp 55 (or 65) on the key switch panel 14 (or 15), and the switching program Run.
[0033]
Next, a backup measure when the operation of the remote control handle 13 becomes ineffective during navigation will be described.
As shown in FIG. 2, first, the operator gets on the main bridge of the ship, turns the start key 51 on the key switch panel 14 to the start position, starts the first engine, and turns on the other key switch panel 15. The start key 61 is turned to the start position to start the second engine (step S1). At this time, when the two engines are idle and the operator turns on the remote control handle 13 by engaging the clutch (step S2), the throttle valve of the first engine is opened in proportion to the rotation angle of the main throttle position sensor 17. Then, the throttle valve of the second engine is opened, the ship starts sailing, and the ship maneuvering process is performed (step S3).
[0034]
During navigation, during a boat maneuvering process, the control circuit between the engine control device 3 or 4 and the main throttle position sensor 17 is disconnected, and the voltage signal from the main throttle position sensor 17 to the engine control device 3 or 4 is interrupted. Erroneously recognizes that the remote control handle 13 has been set to the home position (rotational operation angle of 0 degree), the throttle valve of the engine closes unexpectedly, and then the remote control handle 13 is turned. This also makes it impossible to control the engine speed. That is, an abnormal state occurs.
[0035]
When the output rotation speed of at least one of the engines becomes uncontrollable as described above, the rotation speed of the uncontrollable engine decreases, and the determination program stored in the ROM of the engine control device 3 (or 4). When it is determined that the engine speed has become lower than the low idle speed (abnormal) (step S4), the switching display lamp 55 on the key switch panel 14 (or 15) of the main bridge corresponding to the engine. (Or 65) is lit and the operator is informed visually (step S5). At the same time, under the condition that the auxiliary throttle knob 54 (or 64) is at the low idle speed position and the auxiliary throttle position sensor 56 (or 66) is set to the low speed (step S6), the switching is performed. When the program runs, the control line between the auxiliary throttle position sensor 56 (or 66) and the engine control device 3 (or 4) is automatically switched to active, and the auxiliary throttle position sensor 56 (or 66) is activated. The state is switched to the operating state, and the operation with the auxiliary throttle knob 54 (or 64) becomes possible (step S7).
[0036]
On the other hand, if the auxiliary throttle position sensor 56 (or 66) is not set to the low rotation speed in step S6, the auxiliary throttle knob 54 (or 64) is rotated to the low idle speed position (step S8). When the switching program runs, the control line between the auxiliary throttle position sensor 56 (or 66) and the engine control device 3 (or 4) is automatically switched to the active state, and the auxiliary throttle position sensor 56 (or 66) is switched to the operating state, and the operation with the auxiliary throttle knob 54 (or 64) becomes possible (step S7).
Note that, in the boat maneuvering process in step S3, even if the engine speed becomes low idle by operating the remote control handle 13 or 23, or even if the engine is stopped by operating the start keys 51, 57, 61, 67, it is abnormal. And is considered a normal operation.
[0037]
In such a flow, the remote control handle 13 is backed up by the auxiliary throttle knob 54 or 64 on the key switch panel 14 or 15, and thereafter, by operating the auxiliary throttle knob 54 or 64, the engine speed is reduced. Throttle control is now possible, improving reliability.
[0038]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
First, according to the first aspect of the present invention, even when the control line is disconnected and the main operation means does not operate and the engine speed cannot be controlled, the engine speed can be controlled via the auxiliary operation means. Can be controlled, and the reliability is improved. In particular, in the case of a marine engine, even if the engine cannot be controlled during navigation, the marine engine can be operated by the auxiliary operation means, thereby improving safety.
[0039]
According to the second aspect of the present invention, when the control line is disconnected during navigation and the main operation means does not operate and the throttle speed of the engine cannot be controlled, the abnormality is recognized by the determination means. Thus, the control line can be automatically switched to the active state by the operation of the switching means, and the control can be switched to the engine speed control via the auxiliary operation means, thereby improving the reliability and performing this switching automatically. Therefore, operability is good.
[0040]
According to the third aspect of the present invention, the switching to the engine speed control via the auxiliary operation means can be easily confirmed visually by the switching display unit.
[0041]
According to the fourth aspect of the present invention, it is possible to easily form a circuit for linking ON / OFF of the switching display unit and switching of the auxiliary operation unit to an operable state. In addition, the switching display unit and the auxiliary operation unit can be arranged close to each other, and operability is improved.
[0042]
Further, in the invention according to claim 5, when the control line is disconnected during navigation and the main operation means does not operate and the throttle speed of the engine cannot be controlled, the abnormality determining means detects the abnormality. The control line is automatically switched to the active state by the operation of the switching means, and the control line is automatically switched to the active state by the operation of the switching means. Switching to engine speed control can be performed, improving reliability. In addition, since this switching is performed automatically, operability is good.
[0043]
Further, in the invention according to claim 6, in the event of an abnormality, from the viewpoint of safety, the engine does not suddenly increase in speed at the time of automatic switching to the auxiliary operation means, and can be smoothly operated by the auxiliary operation means.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a control configuration of an engine speed control device mounted on a ship.
FIG. 2 is a flow chart of engine speed control when the operation of a remote control handle 13 becomes ineffective during navigation.
[Explanation of symbols]
3 First engine control device 4 Second engine control device 13 Remote control handle 14 Key switch panel 15 Key switch panel 17 Main throttle position sensor 23 Remote control handle 24 Key switch panel 25 Key switch panel 54 Auxiliary throttle knob 55 Switching display lamp 56 Auxiliary throttle Position sensor 64 Auxiliary throttle knob 65 Switching indicator lamp 66 Auxiliary throttle position sensor

Claims (6)

Operating means for changing the engine speed, main operation detecting means for detecting an operation amount of the operating means, means for changing the engine speed, means for detecting the position of the engine speed changing means, An engine speed control device provided with control means for controlling
An engine speed control characterized in that the operating means is composed of a main operating means and an auxiliary operating means, each of which is detected by a detecting means, and the main operating means can be operated by the auxiliary operating means when an abnormality occurs. apparatus. Determining means for determining an abnormality of the main operation means;
Switching means for automatically switching the auxiliary operation means to active when an abnormality is detected by the determination means;
The engine speed control device according to claim 1, further comprising: 3. The engine speed control device according to claim 2, further comprising a switching display unit for displaying that the auxiliary operation unit has been activated. The engine speed control device according to claim 3, wherein the switching display unit is provided on the same circuit board as a unit that detects an operation amount of the auxiliary operation unit. 3. The engine speed control device according to claim 2, wherein when the main operation unit is operated, when the engine speed becomes equal to or less than a preset rotation speed, the engine is switched to be operable by the auxiliary operation unit. . The engine speed control device according to claim 5, wherein the switching to the auxiliary operation means is performed when the auxiliary operation means is set to a low rotation speed.

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