JPH061062B2 - Warning device for marine propulsion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention ensures that when an internal combustion engine of a plurality of propulsion units mounted on a ship has an abnormality such as overheating or oil reduction, the abnormality is reliably detected. The present invention relates to a warning device for a marine propulsion device that can be recognized.

(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, the abnormality warning means of the internal combustion engine that has caused the abnormality is activated to forcibly reduce the rotation speed, or the internal combustion engine is stopped, or the buzzer sounds or the lamp There are some that give warnings such as lighting.

In this way, even when mounting multiple propulsion units on a ship,
Conventionally, the control for detecting the abnormality of the internal combustion engine and warning the driver is performed only for the internal combustion engine in which each abnormality has occurred, and the internal combustion engine that operates normally is operated as it is.

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

For this reason, for example, when performing control such that the rotation speed of the internal combustion engine on the abnormal side is reduced, the driver may not be able to operate the steering wheel properly. In addition, even if the rotation speed of the internal combustion engine where the abnormality occurs is reduced,
The internal combustion engine may be rotated along with the normal internal combustion engine to reach a predetermined rotation speed or higher, and it is meaningless to reduce the rotation speed of the internal combustion engine in which an abnormality has occurred.

(Problems to be Solved by the Invention) For this reason, the applicant 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 marine vessel propulsion device, which is provided with a control means capable of reliably notifying a driver of the abnormality. By the way, when the circuit configuration of this control means is connected by common grounding or common power supply, if one internal combustion engine causes circuit damage due to incorrect battery connection, electric leakage, natural disaster, etc., the other internal combustion engine Both are likely to be difficult to use, even in normal cases.

The present invention has been made in view of the above points, and the control means for performing warning control according to the internal combustion engines of a plurality of propulsion units is electrically separated so that it is not affected by the internal combustion engine of the other propulsion unit. It is intended to provide a warning device for a propulsion device for a ship.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a warning device for a plurality of propulsion devices mounted on a ship and driven by an internal combustion engine, wherein each of the propulsion devices is provided with the internal combustion engine. An abnormality detecting means for detecting an abnormality of the engine is provided, and the abnormality detecting means detects the abnormality and activates the abnormality warning means provided for the internal combustion engine in which the abnormality has occurred, and is provided for another normal internal combustion engine. In the warning device for a marine vessel propulsion device, which is provided with a control means for activating the abnormality warning means, the control means is an electrically operable means and is provided independently for each of a plurality of internal combustion engines. It is characterized in that they are connected via a means for transmitting a signal but electrically separating them.

(Operation) According to the present invention, a plurality of propulsion devices are mounted on a ship, and when an abnormality occurs in the internal combustion engine of the propulsion device, the abnormality detection means detects the abnormality, and the internal combustion engine is provided for each abnormality. The control means activates the abnormality warning means to give a warning. Then, together with this warning of the internal combustion engine of the abnormal propulsion device, a control signal is output via a means electrically separated to the control means provided for each internal combustion engine of the normal side propulsion device to output the abnormality warning means. To activate and warn.

(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-hand propulsion device shown in FIG. 1, 11L is a left-side control device that warns the abnormality of the internal-combustion engine of the left-hand propulsion device, and these control devices 11R , 11L is the abnormality detection means 1
2R and 12L, control means 13R and 13L, abnormality warning means 14R and 14L, and warning cancellation means 15R and 15L, and the respective control devices 11R and 11L are provided independently.

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 Engine rotation lowering circuits 20R and 20L that lower the rotation speed of the internal combustion engine to warn when oil reduction or overheat is detected
It consists of and.

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 independently provided in the right side internal combustion engine and the left side internal combustion engine, and the respective overheating detection circuits 16R, 16L or the oil reduction detection circuit 17R are provided in the respective control means 13R, 13L. 17
A warning signal output circuit 21R that outputs a warning signal to the internal combustion engine side of the other propulsion machine based on the abnormality detection signal of L,
21L is provided.

The warning signals generated from these warning signal output circuits 21R and 21L are the warning signal input circuit 22 on the other internal combustion engine side.
R, 22L is input to this warning signal output circuit 21R,
21L and the warning signal input circuits 22R and 22L are connected by a photocoupler, respectively, whereby the control means 13R and 1L are connected.
3L is electrically independent. Warning signal input circuit 2
The holding circuit 2 is activated by the warning signal input to 2R and 22L.
3R, 24R actuate to drive the engine speed reduction circuits 20R, 20L of the internal combustion engine of the normal propulsion machine at the same time to reduce the rotation speed of the internal combustion engine, or drive the buzzers 18R, 18L for the driver. Warning.

The warning canceling means 15R, 15L are composed of neutral detecting circuits 24R, 24L. The neutral detecting circuits 24R, 24L issue a canceling signal by an operation for setting the shift state of the propulsion unit to neutral, and the holding circuit 23R,
The holding state of 24R is released, and the warning operation of the buzzers 18R and 18L and the engine speed lowering circuits 20R and 20L is stopped.

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

Also, therefore, the propulsion device cannot propel the vessel.

The holding circuits 23R and 23L may be released by detecting the fully closing operation of the throttle. In this case, the internal combustion engine is in an idle state and the propulsion device can hardly propel the ship. Furthermore, the release of the holding circuits 23R and 23L may be performed by stopping the internal combustion engine.

In short, when the propulsion device is in a state where it is almost unable to propel the ship, the reduction of the rotation speed of the internal combustion engine is released so that the ship does not suddenly start.

As described above, when two propulsion units are mounted on the ship, for example, when overheating occurs in the internal combustion engine of the propulsion unit mounted on the right side, the overheat detection circuit 16 of the abnormality detection unit 12R.
R lowers the rotation speed of the internal combustion engine in which the overheat has occurred, and sounds the buzzer 18R to warn the driver.

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. The warning signal is sent to the warning signal input circuit 22L of the means 13L, but the warning signal is sent through a photocoupler which is means for electrically separating.

As a result, the holding circuit 23L of the control means 13L of the left internal combustion engine constitutes the buzzer 18L which constitutes the abnormality warning means 14L.
Then, the engine speed lowering circuit 20L is activated to simultaneously reduce the rotational speed of the normal left internal combustion engine, 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. Therefore, the driver either stops the right internal combustion engine or operates the right propulsion unit. Shift to neutral,
The cause of the overheat should be removed.

As a result, the cause of the abnormality of the internal combustion engine is removed, and when the abnormality signal is no longer output from the overheat detection circuit 16R, the operation of the abnormality warning means 14R is stopped.

Also, in the normal left internal combustion engine, the engine speed lowering circuit 20L
If the internal combustion engine on the left side is brought into 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 abnormality warning means. 14R stops operating and normal operation becomes possible.

The operation when the oil reduction in the right internal combustion engine occurs is the same as that in the case of the overheat, except that the lamp 19R lights up to warn the oil reduction in the right internal combustion engine.

Further, it goes without saying that the operation when an abnormality occurs in the left internal combustion engine also operates according to the above.

In order to know which of the left and right internal combustion engines has overheated without a water temperature gauge, for example,
Try to make both internal combustion engines 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. Note that the control device for the internal combustion engine of the left-side propulsion device has the same structure as the control device on the right-side, and therefore 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 17
When R operates, the warning signal output circuit 21R operates.

The emitter side of the control transistor 57 of the warning signal output circuit 21R is connected to a constant voltage circuit including 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 the same level as or higher, and when the overheat detection circuit 16R, the oil reduction detection circuit 17R, or the holding circuit 23R does not operate, the base voltage is changed to the collector voltage. The control transistor 57 is kept in the same state or higher than the above state, 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 base voltage of the control transistor 57 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 output 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, an inverter 78 and a capacitor 79, a resistor 80,
It is composed of an inverter 81, and 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 held by the operation of the flip-flop circuit including the NAND circuits 83 and 84. The resistors 85 and 86 and the capacitor 8 are connected to the S input of the NAND circuit 84.
A predetermined power supply voltage Vcc is applied via 7 and a power supply voltage Vcc is applied to the R input of the NAND circuit 83 via the pull-up resistor 82, the output of which is supplied to the base of the control transistor 89 via the resistor 88. Is entered.

The flip-flop circuit is set by turning on the power supply Vcc, and is reset when the phototransistor 75 is turned on to hold the output state.

The neutral detection circuit 2 is provided in the flip-flop circuit.
The contact 70 of 4R is connected through the diode 90, and when the contact 70 is closed, a low level signal is supplied to the NAND circuit 84 to enter the set state, the output thereof is stopped, and the control transistor 89 becomes non-conductive. Hold circuit 2
Retention of 3R is released.

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 95 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 thyristor 97 via 6.

The gate circuit 96 generates a gate signal during a predetermined time when the output of the oscillation circuit 95 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.

For example, if the internal combustion engine does not overheat and the oil is at the lower limit level or more during the ON operation of the main switch 46, the oscillating circuit 95 of the engine rotation reduction circuit 20R does not oscillate, so the thyristor 97 is in the non-conducting state. Therefore, the ignition circuit 35 operates normally, a spark is generated in the ignition plug 43, 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.

Then, when the overheat detection circuit 16R or the oil reduction detection circuit 17R operates, the oscillation circuit 95 of the engine rotation reduction circuit 20R starts oscillating, and the thyristor 97 becomes conductive via the gate circuit 96 based on the oscillation output, and ignition is performed. The plug 43 misfires and the internal combustion engine continues to rotate at a low speed.

At the same time, the control transistor 57 of the warning signal output circuit 21R becomes conductive to operate the photocoupler 71a, 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, the engine rotation reduction circuit 20L is driven, and the normal rotation speed of the internal combustion engine is reduced. 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 make the oil amount normal, and the neutral detection circuit 24R is overheated under the condition that it is not operating. When the contacts 55 and 50 of the detection circuit 16R and the oil reduction detection circuit 17R are opened, 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,
The warning signal input circuit 22 on the left side via the photocoupler 71a
Although the warning signal is not input to L, the holding circuit 23L is not released.

Therefore, in order to release the normal low-speed rotation state of the left internal combustion engine, when the shift position of the left internal combustion engine is set to the neutral position, the neutral detection circuit 24L is activated and the holding circuit 23L is released, and the left side is released. The operation of the engine speed lowering circuit 20L is stopped, and the internal combustion engine returns to a normal operating state.

In this way, the control means 13 for controlling the left and right internal combustion engines
R and 13L are independently provided, and the control means 13R and 1L are provided.
3L are connected via photocouplers 71a and 71b, and each has an electrically independent circuit configuration. For this reason, the photocoupler is provided electrically independently such as grounding or power supply constituting the circuit of the control means, and even if the battery connection of one internal combustion engine is incorrect, or the circuit is damaged due to electric leakage or natural disaster, etc. Therefore, the other internal combustion engine will not be adversely affected by being shut off by.

Further, when the photo couplers 71a and 71b are used for connecting the control means 13R and 13L, the current consumption is small, and
It has a low magnetic effect such as electromagnetic induction, a simple circuit configuration, and low cost.

Further, a relay can be used instead of the photocoupler as the means for transmitting the signal but electrically separating it.

(Effects of the Invention) As described above, according to the present invention, the control means for controlling the abnormality warning means for giving an alarm for abnormality is an electrically operated means, and is provided independently for each of a plurality of internal combustion engines. Since the control means are connected to each other through a means for transmitting a signal but electrically separating them from each other, the earth or the power source constituting the control means are electrically independent, and the battery is connected to one of the internal combustion engines. Even if the circuit is damaged due to an error, an electric leakage, or a natural disaster, it is possible to avoid adversely affecting the other internal combustion engine.

[Brief description of 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 ... Warning cancellation means 21R, 21L ... Warning signal output circuit 22R, 22L ... Warning signal input circuit 71a , 71b ... Photo coupler

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 detecting means for detecting an abnormality in the internal combustion engine. When the abnormality is detected by the means, the propulsion device for a ship is provided with a control means for activating the abnormality warning means provided in the internal combustion engine in which the abnormality has occurred and for activating the abnormality warning means provided in another normal internal combustion engine. In the warning device, the control means is a means for electrically operating, and is provided independently for each of a plurality of internal combustion engines, and a signal is transmitted between the control means but electrically separated by means. Warning device for a marine propulsion device, which is characterized in that it is connected to each other.