JPH0610433B2 - Warning device for marine propulsion - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to propulsion when abnormality occurs in an internal combustion engine of a plurality of propulsion units mounted on a ship, such as overheating or oil reduction. The present invention relates to a warning device for a marine vessel propulsion device that lowers the rotation speed of a normal propulsion engine internal combustion engine together with an engine internal combustion engine.

[Prior Art] Some ships are equipped with a plurality of propulsion units to further increase the propulsive force.

Each of these propulsion units is provided with an abnormality detecting means for detecting an abnormality of the internal combustion engine.The abnormality detecting means constantly monitors the oil amount and the engine temperature, and when the oil amount falls below a certain amount, Is detected to be above a certain level, and the abnormality warning means of the internal combustion engine that has caused the abnormality is activated to forcibly reduce the rotation speed to give a warning.

In this way, even when mounting multiple propulsion units on a ship,
The control for detecting the abnormality of the internal combustion engine and warning the driver is performed only for the internal combustion engine having the abnormality, and the normally operating internal combustion engine is operated as it is.

However, when multiple propulsion units are installed on a ship, even if the internal combustion engine of the abnormal propulsion unit is warned, it will not operate if the normal internal combustion engine is operating. The person may not notice the abnormality of the internal combustion engine.

[Problems to be Solved by the Invention] For this reason, the applicant of the present invention has previously filed Japanese Patent Application No. 60-119521.
In the specification, when a ship is equipped with a plurality of propulsion units and an abnormality occurs in the internal combustion engine of any one of the propulsion units,
Provided is a warning device for a ship propulsion device, which reduces the rotation speed of the internal combustion engine of the abnormal propulsion device and also reduces the rotation speed of the internal combustion engine of the normal propulsion device.

In this way, control is performed to reduce the rotational speed of the normal internal combustion engine from the internal combustion engine side where an abnormality has occurred. When the main power source of the internal combustion engine on the abnormal side is turned off, the control for reducing the rotation speed of the internal combustion engine on the normal side is not performed. Therefore, the normal internal combustion engine tries to return to the original state, and a rapid increase in the rotation speed occurs.

The present invention has been made in view of the above point, and provides a warning device for a marine propulsion device in which the release of the control for reducing the normal rotation speed of the internal combustion engine is not affected by the abnormal control on the internal combustion engine side. The purpose is to do.

[Means for Solving the Problems] In order to solve the above problems, the present invention is a warning device for a plurality of propulsion devices mounted on a ship and driven by an internal combustion engine, wherein each propulsion device includes the internal combustion engine. Is provided with an abnormality detecting means for detecting an abnormality of the internal combustion engine, and by detecting the abnormality of the abnormality detecting means, the engine rotation speed reducing means for reducing the rotation speed of the abnormal internal combustion engine is operated, and the rotation speed of another normal internal combustion engine is also activated. In the warning device for a ship propulsion device that operates the engine speed reducing means for reducing the engine speed, when the abnormality detecting means detects an abnormality, another operating state of the engine speed reducing means provided in the normal internal combustion engine is activated. Holding means for holding the holding means is provided with a signal from a detecting means for detecting the neutral state of the other normal internal combustion engine or the fully closed state of the throttle. The holding state is released only in this case, and the holding state is not released depending on the signal from the abnormality detecting means.

[Operation] According to the present invention, when a plurality of propulsion units are mounted on a ship and an abnormality occurs in the internal combustion engine of any one of the propulsion units, the abnormality detection unit detects the abnormality and the abnormality of the internal combustion engine is detected. The engine rotation speed reducing means is operated to reduce the rotation speed.
Then, together with the abnormal internal combustion engine of the propulsion unit, the rotational speed reduction unit provided in the normal side propulsion unit reduces the normal rotation speed of the internal combustion engine.

The operating state for reducing the rotation speed of the internal combustion engine is held by the holding means, and the holding state is maintained only by the signal from the detecting means for detecting the neutral state of the other normal internal combustion engine or the fully closed state of the throttle. The hold state is not released by the signal from the abnormality detecting means.

Therefore, normal control of the internal combustion engine is performed independently of control of the internal combustion engine in which an abnormality has occurred.For example, even when the main power source of the internal combustion engine on the abnormal side is turned off during operation, the normal side of the internal combustion engine is controlled. Does not affect the control of the internal combustion engine. Therefore, the rotation speed of the internal combustion engine on the normal side can be smoothly reduced by the signal from the detection unit that detects the neutral state or the fully closed state of the throttle.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a small boat to which the present invention is applied.

In the figure, reference numeral 1R is a right-side propulsion unit, 1L is a left-side propulsion unit, and the right-side propulsion unit 1R and the left-side propulsion unit 1L are arranged on the stern plate 3 of the ship 2. A steering wheel 5 and a remote operation device 6 for performing shift operations and throttle operations of the propulsion units 1R and 1L are provided in front of a cockpit 4 provided on the front side of the boat 2. Further, a panel 7 provided with a main switch, a panel switch and the like is arranged near the handle 5.

FIG. 2 is a basic configuration block diagram showing an embodiment of the present invention.

In the figure, reference numeral 11R is a right side control device that warns the abnormality of the internal combustion engine of the right side propulsion device shown in FIG. Is an abnormality detecting means 12R, 12
L, control means 13R, 13L, and abnormality warning means 14
R, 14L and releasing means 15R, 15L.

The abnormality detecting means 12R, 12L are composed of overheat detecting circuits 16R, 16L for detecting overheating of the internal combustion engine and oil decrease detecting circuits 17R, 17L for detecting oil decrease.

The abnormality warning means 14R, 14L issue a warning when the oil reduction or overheat is detected by these detection circuits, a buzzer 18R, 18L, a lamp 19R, 19L that issues an alarm when the oil reduction is detected, and It is composed of engine rotation speed reduction circuits 20R and 20L that are engine speed reduction means for lowering the rotation speed of the internal combustion engine to give a warning when oil reduction or overheat is detected.

It should be noted that lowering the rotation speed of the internal combustion engine acts not only to reduce the oil consumption but also to reduce the overheat state.

Further, the control means 13R, 13L are the overheat detection circuit 1
Based on the abnormality detection signal from the 6R, 16L or the oil reduction detection circuits 17R, 17L, a warning signal output circuit 21R, 21L for outputting a warning signal is provided to also issue a warning to the internal combustion engine side of the other propulsion machine. There is. The warning signals generated from these warning signal output circuits 21R and 21L are input to the warning signal input circuits 22R and 22L on the other internal combustion engine side, and the states thereof are holding circuits 23R and 2 which are holding means.
Holds at 3L. As a result, the engine speed lowering circuits 20R and 20L of the internal combustion engine of the normal propulsion unit are simultaneously driven to decrease the rotational speed of the internal combustion engine, and the buzzer 18
Drive the R and 18L to warn the driver.

The releasing means 15R, 15L are, for example, neutral detection circuits 24R, 24L, throttle fully closed detection circuit 25.
It has R and 25L detection means. The neutral detection circuits 24R and 24L generate a release signal by the operation of setting the shift state of the propulsion device to neutral, and the holding circuit 2
Release the holding state of 3R, 23L and buzzer 18R, 1
The warning operation of 8L and the engine speed lowering circuits 20R and 20L is stopped.

Further, the throttle fully closed detection circuits 25R and 25L issue a release signal by the operation of fully closing the throttle of the propulsion device to release the holding state of the holding circuits 23R and 23L, and the buzzers 18R and 18L and the engine rotation lowering circuit 20R. , 20
Stop the warning action of L.

In this way, the holding circuits 23R, 23L are either the neutral detection circuits 24R, 24L or the throttle fully closed detection circuit 25.
The holding state is released only by R and 25L, and it is not released by the stop of the warning signal input from the other warning signal output circuits 21R and 21L through the warning signal input circuits 22R and 22L.

Therefore, normal control of the internal combustion engine is performed independently of control of the internal combustion engine in which an abnormality has occurred.For example, even when the main power source of the internal combustion engine on the abnormal side is turned off during operation, the normal side of the internal combustion engine is controlled. Does not affect the control of the internal combustion engine. Therefore, the rotation speed of the internal combustion engine on the normal side can be smoothly reduced by the signal from the detection unit that detects the neutral state or the fully closed state of the throttle.

Also, when the shift is in the neutral state, the internal combustion engine and the propeller that is the propulsion means are not connected, so the warning force is automatically released and the rotational force is transmitted to the propeller even if the rotational speed of the internal combustion engine increases. Not done. Therefore, the propulsion device cannot propel the ship.

Further, when the throttle is fully closed, the internal combustion engine is in an idle state, and the propulsion device can hardly propel the ship.

As described above, when the propulsion device is in a state where the marine vessel can hardly be propelled, the decrease in the rotational speed of the internal combustion engine is released, and the marine vessel does not suddenly start.

Therefore, when two propulsion units are mounted on a ship, for example,
When the internal combustion engine of the propulsion unit mounted on the right side is overheated, the overheat detection circuit 16R of the abnormality detection means 12R lowers the rotation speed of the internal combustion engine in which the overheat has occurred, and causes the driver to ring the buzzer 18R. Warning.

At the same time, the abnormality detection means 12R inputs an abnormality signal to the warning signal output circuit 21R of the control means 13R provided in the propulsion machine in which the abnormality has occurred, and controls the left internal combustion engine that is operating normally. A warning signal is sent to the warning signal input circuit 22L of the means 13L.

As a result, the holding circuit 23L of the control means 13L for the left internal combustion engine is brought into the holding state, and the buzzer 18L and the engine rotation speed lowering circuit 20L that constitute the abnormality warning means 14L are actuated so that the normal rotational speed of the left internal combustion engine At the same time, and a buzzer sounds to warn.

By these operations, the driver notices the abnormality of the internal combustion engine,
Trying to know if it is overheating or oil loss.
At this time, for example, by looking at a conventional water temperature gauge (not shown), it can be seen that the right internal combustion engine is overheated, so the driver either stops the right internal combustion engine or shifts the right propulsion device. It should be neutral and the cause of the overheating should be removed. As a result, the cause of abnormality of the internal combustion engine is removed, and when the abnormality signal is no longer output from the overheat detection circuit 16R, the abnormality warning means 14R.
Will stop operating.

Also, in the normal left internal combustion engine, the engine speed lowering circuit 20L
If the internal combustion engine on the left side is set to the neutral state when the internal combustion engine is in the normal operating state while the engine is operating, the holding state of the holding circuit 23L is released via the neutral detection circuit 15L, and the normal operation is performed. Will be possible.

The operation when oil is reduced in the right internal combustion engine is the same as that in the case of overheating, but the lamp 19R
The difference is that is lit up to warn of oil depletion in the right internal combustion engine.

Further, it goes without saying that the operation in the case where an abnormality occurs in the left internal combustion engine also operates in accordance with the above.

In order to know which of the left and right internal combustion engines has overheated when a water temperature gauge or the like is not provided, for example, both internal combustion engines may be made neutral. If the right side is abnormal, the left side can rotate normally, so that the right side abnormality can be immediately known.

Next, a more specific embodiment of the present invention is shown in FIG.

FIG. 3 shows the warning device for the propulsion device for a ship shown in FIG.
It is a detailed circuit diagram of a control device with which the internal combustion engine of the right-hand propulsion machine was equipped. The control device provided in the internal combustion engine of the propulsion device on the left side is the same as the control device on the right side, and a description thereof will be omitted.

In the figure, reference numeral 31 is a magnet having charging coils 32 and 33 and a pulsar coil 34. The AC output of the charging coil 32 is rectified by a diode 36 of a known capacitor discharge ignition circuit 35. The rectified positive half wave is charged in the capacitor 37, and the negative half wave is discarded through the diode 38.

On the other hand, the output of the pulser coil 34 is rectified by the diode 39 and input to the gate of the thyristor 41 via the noise removing circuit 40. When this thyristor 41 is ignited, at the same time, the electric charge charged in the capacitor 37 is discharged through the primary side of the ignition coil 42, and a spark is generated in the ignition plug 43. The AC output obtained by the charging coil 33 is rectified by the rectifier 44 and then charged in the storage battery 45, and this DC power is supplied by the ON operation of the main switch 46 in addition to the electric circuit operation described below. It is also used as a power source for electric circuits. The lamp 47 is connected in series via the diode 48 to the oil reduction detection circuit 17R, and this series circuit is connected in parallel to the storage battery 45 via the main switch 46.

The oil reduction detection circuit 17R includes a thyristor 49 connected in series to the lamp 47 and the diode 48, a contact 50 and a resistor 51 connected between the gate and the cathode of the thyristor 49, and a capacitor charged by closing the contact 50. 52.

In the oil decrease detection circuit 17R, once the liquid level becomes lower than the lower limit, the contact point 50 is closed and the capacitor 52 is charged, the thyristor 49 is ignited and the lamp 47 is continuously lit. This state is maintained until the main switch 46 is opened.

The buzzer 53 receives the overheat detection circuit 16 via the diode 54.
It is connected in series with R, and this series circuit is the main switch 4
It is connected in parallel to the storage battery 45 via 6. The overheat detection circuit 16R has a temperature sensitive contact 55, and when the temperature of the cooling water of the internal combustion engine exceeds a predetermined temperature, the circuit is closed and the buzzer 53 is sounded to warn.

This overheat detection circuit 16R and the oil reduction detection circuit 17
R is connected via a diode 56, and when the temperature-sensitive contact 55 of the overheat detection circuit 16R is closed, the buzzer 53 sounds and the lamp 47 does not light. On the other hand, when the contact point 50 of the oil reduction detection circuit 17R is closed, the lamp 47 lights up and the buzzer 53 sounds.

This overheat detection circuit 16R or oil reduction detection circuit 17R
The warning signal output circuit 21R is activated when is activated.

The control transistor 57 of the warning signal output circuit 21R is connected at its emitter side to a constant voltage circuit composed of a resistor 58, a constant voltage diode 59, and a filter capacitor 60. This constant voltage circuit is connected via a resistor 61, a diode 62 and a main switch 46. It is connected in parallel to the storage battery 45.

A resistor 63 is connected between the emitter and the base of the control transistor 57, and the voltage from the constant voltage circuit is biased via the resistor 63.

The base of the control transistor 57 is a constant voltage diode 65, a resistor 66, a voltage holding capacitor 67 via a resistor 64.
Connected to the constant voltage circuit of
The diode 69 is connected in parallel to the overheat detection circuit 16R and the oil reduction detection circuit 17R.

The Zener voltage of the constant voltage diode 65 connected in parallel to the base of the control transistor 57 via the resistor 64 is
The Zener voltage of the constant voltage diode 59 connected in parallel to the emitter is set to be equal to or higher than the Zener voltage, and the overheat detection circuit 16R, the oil reduction detection circuit 17R, or the holding circuit 2 is set.
When the 3R does not operate, the base voltage is kept at the same as or higher than the collector voltage, and the control transistor 57 is made non-conductive.

On the other hand, the overheat detection circuit 16R and the oil reduction detection circuit 17R
Alternatively, when the holding circuit 23R operates, the control transistor 5
The base voltage of 7 drops to the ground voltage and the control transistor 57 becomes conductive.

A photo coupler 71 is provided on the collector side of the control transistor 57.
The light emitting diode 72 of a is grounded through the resistor 73. The phototransistor 74 becomes conductive by the light emission of the light emitting diode 72, and the control means 11 for the left internal combustion engine
The similarly configured warning signal input circuit of L is driven.

An input signal is given to the warning signal input circuit 22R of the right internal combustion engine when the phototransistor 75 of the photocoupler 71b is turned on by the output of the warning signal output circuit of the left internal combustion engine.

The warning signal input circuit 22R includes a resistor 76, a capacitor 77,
It is composed of an inverter 78, a capacitor 79, a resistor 80, and an inverter 81. After shaping the input signal, it is supplied to the holding circuit 23R. A pull-up resistor 82 is connected to the inverter 78.

The holding circuit 23R is composed of a flip-flop circuit including NAND circuits 83 and 84, the warning signal input circuit 22R is connected to the R input of the NAND circuit 83, and the S input of the NAND circuit 84 has resistors 85 and 86 and A predetermined power supply voltage Vcc is connected via a capacitor 87, and its output is connected to the base of a control transistor 89 via a resistor 88. The NAND circuits 83 and 85 of the holding circuit 23R are automatically set when the power source Vcc is turned on and do not output.
When the phototransistor 75 becomes conductive and the R input of the NAND circuit 83 becomes low level, it is reset and holds the output state.

The flip-flop circuit includes a contact 70a of the neutral detection circuit 24R and a throttle fully closed detection circuit 2
The 5R contact 70b is connected through the diode 90, and when the contact 70a or the contact 70a is closed, the S input of the NAND circuit 84 is set to the low level. In the reset state, the neutral circuit 24R or the throttle fully closed detection circuit 25
When the S input of the NAND circuit 84 becomes low level by the operation of R, it becomes a set state and does not output.

The collector side of the control transistor 89 is connected to the engine rotation lowering circuit 20R and is also connected to the buzzer 53 via the diode 54, while the emitter side is grounded. Therefore, when a warning signal is input to the base of the control transistor 89 to make it conductive, the engine rotation lowering circuit 20R
Is activated and the buzzer 53 sounds to warn of an abnormality.

In the engine rotation lowering circuit 20R, the waveform shaping circuit 91 converts the output of the pulser coil 34 into a rectangular wave pulse, and the F / V conversion circuit 92 converts the output frequency of this pulse into a voltage indicating the rotation speed.

The input side of the delay circuit 93 is connected to the holding circuit 23R, the overheat detection circuit 16R, and the oil reduction detection circuit 17R via the diode 94. The output voltage of the delay circuit 93 becomes a predetermined integrated voltage when the internal combustion engine is operating normally, while the holding circuit 23R, the overheat detection circuit 16R, and the oil decrease detection circuit 17 are caused by overheating or oil decrease.
The output voltage is configured to drop for a while based on the output signal of either R.

Then, the output voltage of the delay circuit 93 is input to the oscillation circuit 94, and the oscillation circuit 94 receives the holding circuit 23R and the overheat detection circuit 1
When the output signal of either the 6R or the oil reduction detection circuit 17R is input, oscillation is started, and the duty ratio is changed according to the difference between the output voltage of the delay circuit 93 and the output voltage of the F / V conversion circuit 92. Generates oscillating output, and gate circuit 9
Input to the thyristor 96 via 5.

The gate circuit 95 generates a gate signal during a predetermined time when the output of the oscillation circuit 94 becomes high level. For this reason,
Within this predetermined time, the positive half-wave of the charging coil 32 is discharged through the thyristor 41, the charging of the capacitor 37 is stopped, and no spark is generated on the spark plug 43.

The detailed structure and operation of the engine speed lowering circuit 20R are shown in the specification of Japanese Patent Application No. 58-193193 filed previously by the applicant.

Next, the operation of this embodiment will be described.

Since the holding circuits 23R and 23L are automatically set and do not output when the power source Vcc is turned on, the control transistor 89 is in a non-conducting state and the holding circuits 23R and 23L do not operate. Is in a driving state.

Then, for example, while the main switch 46 is on,
If the internal combustion engine does not overheat and the oil level is equal to or higher than the lower limit level, the oscillation circuit 94 of the engine rotation reduction circuit 20R does not oscillate, so the thyristor 96 is in the non-conduction state.
Therefore, the ignition circuit 35 operates normally and the ignition plug 4
A spark is generated in 3 and the internal combustion engine continues to rotate normally.

By the way, after the main switch 46 is turned on, the buzzer 18R operates when the overheat of the right internal combustion engine is detected by the overheat detection circuit 16R, and, for example, when the oil reduction is detected by the oil reduction detection circuit 17R, the buzzer is activated. 1
8R and lamp 19R are activated to notify the driver of the abnormality.

When the overheat detection circuit 16R or the oil reduction detection circuit 17R is activated, the oscillation circuit 94 of the engine rotation reduction circuit 20R starts oscillating, and the thyristor 96 becomes conductive via the gate circuit 95 based on the oscillation output, and ignition is performed. Plug 4
3 misfires and the internal combustion engine continues to rotate at low speed.

At the same time, the control transistor 57 of the warning signal output circuit 21R becomes conductive, the photocoupler 71 is operated, and the warning signal is input to the warning signal input circuit 22L of the left internal combustion engine.

As a result, the holding circuit 23L of the left internal combustion engine is held in the reset state, and this holding state is continued to drive the engine rotation reduction circuit 20L to reduce the normal rotation speed of the internal combustion engine. At the same time, the buzzer 18L is simultaneously driven to warn the driver.

Then, for example, overheat is eliminated by low-speed rotation or injection of cooling water, and during low-speed rotation, oil is injected into the tank to obtain a normal oil amount, and the neutral detection circuits 24R, 24L or the throttle fully closed detection circuit 25R are detected. , 2
When the contacts 55 and 50 of the overheat detection circuit 16R and the oil reduction detection circuit 17R are opened under the condition that the 5L is not operating, the operation of the buzzer 18R, the lamp 19R and the engine rotation lowering circuit 20R is stopped.

At the same time, the control transistor 57 of the warning signal output circuit 21R becomes non-conductive, and the warning signal input circuit 22 on the left side
Although the warning signal is not input to L, the flip-flop circuit of the holding circuit 23L continues to maintain the reset state.
The holding state of the holding circuit 23L of the left internal combustion engine is not released even when the main switch 46 of the right internal combustion engine is turned off.

In order to cancel the normal low speed rotation state of the internal combustion engine on the left side, for example, when the shift position of the left side propulsion unit is set to neutral, the neutral detection circuit 24L operates and the holding circuit 23L enters the set state to release the holding. To be done.

Therefore, the operation of the left engine rotation reduction circuit 20L is stopped, the left internal combustion engine returns to the normal operating state, and the normal low speed rotation is released independently of the right internal combustion engine release. .

[Effects of the Invention] As described above, the present invention is provided with the holding means for holding the operating state when the engine speed reduction means provided in another normal internal combustion engine is activated by the abnormality detection of the abnormality detection means, This holding means is released from the holding state only by the signal from the detecting means which detects the neutral state of the other normal internal combustion engine or the fully closed state of the throttle, and the holding state is not released by the signal from the abnormality detecting means. The normal control of the internal combustion engine can be performed independently of the control of the internal combustion engine in which the abnormality has occurred.For example, even when the main power source of the internal combustion engine on the abnormal side is turned off during operation, the normal side is controlled. Does not affect the control of the internal combustion engine.

Therefore, the rotational speed of the internal combustion engine on the normal side can be smoothly reduced by the signal from the detection means for detecting the neutral state or the fully closed state of the throttle, and the internal combustion engine on the abnormal side is affected by the control. Therefore, a normal internal combustion engine can be returned to a normal operating state in an appropriate state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a small vessel to which the present invention is applied, FIG. 2 is a basic configuration block diagram of the present invention, and FIG. 3 is a more detailed circuit diagram of FIG. 11R, 11L ... Control means 12R, 12L ... Abnormality detection means 13R, 13L ... Control means 14R, 14L ... Abnormality warning means 15R, 15L ... Release means 20R, 20L ... Engine rotation lowering circuit 23R, 23L ... ... Holding circuit 24R, 24L ... Neutral detection circuit

Claims (1)

[Claims] 1. A warning device for a plurality of propulsion units mounted on a ship and driven by an internal combustion engine, wherein each propulsion unit is provided with abnormality detection means for detecting an abnormality in the internal combustion engine. Of the marine vessel propulsion device that activates the engine rotation speed reduction means that reduces the rotation speed of the abnormal internal combustion engine by detecting the abnormality of the means, and activates the engine rotation speed reduction means that reduces the rotation speed of another normal internal combustion engine. In the warning device, when the abnormality detection means detects an abnormality, when the engine speed reduction means provided in another normal internal combustion engine is activated, it is provided with holding means for holding the operating state, and the holding means is provided with the other normal state. The holding state is released only by the signal from the detecting means for detecting the neutral state of the internal combustion engine or the fully closed state of the throttle, and the signal from the abnormality detecting means is released. Warning device marine propulsion unit, characterized in that not release the holding state by.