JPH0668271B2 - Ignition device for ship propulsion - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device for a marine vessel propulsion device, and more particularly to an ignition device for a marine vessel propulsion device that performs remote control to warn of an abnormality of an internal combustion engine.

[Prior Art] In a ship propulsion device, the output of a charging coil driven by the operation of an internal combustion engine is controlled based on a pulse signal output from a pulsar coil in synchronization with the rotation of the internal combustion engine, and a high voltage is generated in an ignition coil. Some include an ignition circuit that activates the battery, an abnormality detection circuit that uses a battery as a driving power source to detect an abnormality in the internal combustion engine, and an alarm circuit that issues an alarm based on the detection signal.

In such an internal combustion engine, an abnormality that occurs in the internal combustion engine, such as overheating or a drop in the oil level, is detected by an abnormality detection circuit, and a warning signal or a buzzer is used to alarm the detected signal, or the rotation speed of the internal combustion engine is reduced. There is something. When an abnormality occurs in the internal combustion engine, the kill switch is operated to stop the internal combustion engine.

Further, in a ship, since power consumption of navigation devices such as meters and lamps is large, for example, a pair of batteries are provided,
One battery is charged by the operation of the internal combustion engine, and the other battery is used as a drive power source for a different condition detection circuit or the like for detecting an abnormality of the navigation system or the internal combustion engine, and these two are switched at an appropriate time.

[Problems to be Solved by the Invention] As described above, in the case where the internal combustion engine is stopped by operating the kill switch when an abnormality occurs in the internal combustion engine, noise may enter when the signal line of the kill switch becomes long. The internal combustion engine may not be quickly stopped.

In the case of a battery that is frequently switched, the switching may be mistaken, or the battery may come off during operation, and the internal combustion engine may stop due to load fluctuation or noise of the battery that occurs at this time.

The present invention has been made in view of the above point, and it is possible to quickly stop the internal combustion engine by operating the kill switch, and without stopping the internal combustion engine due to an abnormality of the internal combustion engine or an abnormality such as battery loss. An object of the present invention is to provide an ignition device for a ship propulsion device, which can be controlled to reduce the rotation speed.

[Means for Solving the Problems] In order to solve the above problems, the present invention is based on a pulse signal that outputs the output of a filling coil driven by the operation of an internal combustion engine in synchronization with the rotation of the internal combustion engine from a pulsar coil. An ignition circuit that controls and generates a high voltage in the ignition coil,
In an ignition device for a marine propulsion device, which includes a battery-driven power source and an abnormal output circuit that detects an abnormality of an internal combustion engine, and an alarm circuit that issues an alarm based on this detection signal, in the pulsar coil, a pulse signal is generated by operating a kill switch. An engine stop circuit that controls the input to the ignition circuit and a misfire circuit that thins out the input of the pulse signal to the ignition circuit through the holding circuit by the operation of the abnormality detection circuit to reduce the rotation speed of the internal combustion engine are arranged in parallel. Connected, the holding circuit operates the misfire circuit by a detection signal from the abnormality detection circuit or a detection signal from a battery detection circuit that detects detachment of the battery, and holds the operation by outputting the neutral switch or It is characterized in that it is configured to be released upon detection of the rotation speed of the internal combustion engine when fully closed.

[Operation] In the present invention, the misfire circuit is activated via the holding circuit by the detection signal from the abnormality detection circuit for detecting the abnormality of the internal combustion engine or the detection signal from the battery detection circuit for detecting the disconnection of the battery, and Hold the operating state of the misfire circuit.

Therefore, when an abnormality occurs in the internal combustion engine, when the kill switch is operated to stop the internal combustion engine by the operation of the engine stop circuit, the rotation speed of the internal combustion engine is reduced by the operation of the misfire circuit due to the abnormality detection. It can be stopped quickly by operating the kill switch.

Further, when the battery is switched, when the battery is switched incorrectly, or when the battery is removed during operation, the rotation speed of the internal combustion engine is reduced by the operation of the misfire circuit to warn. Further, since the operation state of the misfire circuit is released by detecting the output of the neutral switch or the engine speed when the throttle is fully closed, the internal combustion engine can be operated at a low rotational speed without stopping the internal combustion engine due to load fluctuation of the battery or noise.

[Embodiment] The present invention will be described below based on an embodiment shown in the drawings.

In the figure, reference numeral 1 is a charging coil, which generates power when an internal combustion engine of a ship propulsion device (not shown) is operated and outputs AC power. This AC power is rectified by the diode 4 of the ignition circuit 3 provided in the control unit 2 and charged in the capacitor 5, and this charge is discharged by conduction of the thyristor 6,
A high voltage on the secondary side of the ignition coil 7 is generated to spark the spark plug 8.

The gate of the thyristor is grounded via the capacitor 9,
A pulsar coil 10 is connected between the capacitor 9 and the gate.

An engine stop circuit 11 and a misfire circuit 12 are connected in parallel to the pulsar coil 10. The engine stop circuit 11 has an emitter of the transistor 13 connected to the pulsar coil 10, a collector grounded, and a base 14 via a resistor 14. Kill switch
15 are connected. When a base current flows through the transistor 13 by operating the kill switch 15, the transistor 13 becomes conductive and the output side of the pulsar coil 10 is grounded.
10 outputs disappear.

For this reason, in particular, in the case of a ship that is remotely operated, the distance between the kill switch 15 and the engine stop circuit 11 becomes long, and even if the signal line becomes long, the pulse signal is generated in the control unit 2 when the engine stop circuit 11 operates. Since it returns to the pulsar coil 10 immediately after passing through, the line length through which the pulse signal flows is shortened and noise is less likely to enter. Therefore, the internal combustion engine can be quickly stopped without causing the ignition circuit 3 to malfunction.

Further, since the control signal controlled by the kill switch 15 only needs to activate the transistor 13, the operating voltage of the transistor 13 can be increased to make a circuit resistant to noise.

The misfire circuit 12 is controlled by a rotation speed control circuit 16, a holding circuit 18 is connected to the rotation speed control circuit 16, and an abnormality detection circuit 19 is connected to the holding circuit 18. When the detection signal from the abnormality detection circuit 19 is input to the holding circuit 18, the misfire circuit 12 is operated via the rotation speed control circuit 16. The holding circuit 18 is released from the holding state by detecting the neutral switch 20 and the engine speed when the throttle (not shown) is fully closed.

The abnormality detection circuit 19 is composed of an overheat detection circuit 21, an oil level detection circuit 22 and a two-machine alarm detection circuit 23, and a battery selected by a changeover switch 26 via a parallel circuit of a buzzer 24 and a lamp 25, respectively. It is connected to 27 and 28, and the drive voltage is applied.

When the temperature of the cooling water of the internal combustion engine becomes a predetermined temperature abnormality, the overheat detection circuit 21 closes the contact 29 and outputs a detection signal. When the oil level reaches a predetermined position, the oil level detection circuit 22 closes the contact 30 and brings the thyristor 31 into conduction to output a detection signal. Further, the alarm detection circuit 23 controls the operation of the internal combustion engine of the propelling machine that is normally operated (for example, to stop it) when an abnormality occurs in the other internal combustion engine when, for example, two propulsion machines are mounted. ) The system controls the abnormality. For example, when the contact point 32 is closed by an abnormal signal of the internal combustion engine of the other propulsion device, the transistor 33 becomes conductive by this, and a detection signal for stopping the internal combustion engine operating normally is output.

The holding circuit 18 is activated by the output of the detection signals from the abnormality detection circuit 19, and the buzzer 24 and the lamp 25 give an alarm.

Further, the batteries 27, 2 as the driving power source of the abnormality detection circuit 19
8 is connected to the battery detection circuit 34 via the changeover switch 26, and detects the voltage drop due to the battery disconnection,
When the battery is removed, it is determined that the internal combustion engine is abnormal, the holding circuit 18 is activated, and the alarm output circuit 35 is activated to issue an alarm.

Therefore, the abnormality detection circuit 19 of the internal combustion engine has a changeover switch.
The drive power is supplied from the battery 27 or the battery 28 selected in 26, and the batteries 27 and 28 that are the drive power of the abnormality detection circuit 19 are switched by the changeover switch 26, and for example, the battery may be removed. Detected by the battery detection circuit 34, an alarm is issued via the alarm output circuit 35 and the holding circuit 18 is activated.

When the misfire circuit 12 is operated through the rotation speed control circuit 16 by the operation of the holding circuit 18, for example, the pulsar signal of the pulsar coil 10 is scattered. As a result, the time interval for conduction of the thyristor 6 becomes long, the spark of the spark plug is scattered, the rotation speed of the internal combustion engine decreases, and an alarm of abnormality of the internal combustion engine is issued.

The holding circuit 18 that gives an alarm for this abnormality is released by detection of the engine speed when the neutral switch 20 or the throttle (not shown) is fully closed, and can be safely released without stopping the internal combustion engine. It is not canceled due to load fluctuations or noise.

When the batteries 27 and 28 are properly connected and one of the detection circuits of the abnormality detection circuit 19 is activated, the buzzer 24
The lamp 25 is activated, and the holding circuit 18 is activated. Therefore, similarly to the above, the misfire circuit 12 is operated via the rotation speed control circuit 16 to reduce the rotation speed of the internal combustion engine to give an alarm.

The release of the holding circuit 18 is performed by the neutral 20 as described above.
Alternatively, it is performed by detecting the number of revolutions when the throttle is fully closed, and is not released even by load fluctuations of the batteries 27, 28 or noise.

[Effects of the Invention] As described above, according to the present invention, the holding circuit is operated by the detection signal from the abnormality detection circuit detecting the abnormality of the internal combustion engine or the detection signal from the battery detection circuit detecting the disconnection of the battery. Since the misfire circuit is operated via the engine and the operating state of this misfire circuit is maintained, when an abnormality occurs in the internal combustion engine, when the internal combustion engine is stopped by operating the kill switch by operating the kill switch Upon detection, the rotation speed of the internal combustion engine can be reduced by the operation of the misfire circuit, and can be stopped quickly by operating the kill switch.

In addition, if the battery is switched, or if the battery is mistakenly switched, or if the battery is removed during operation, the engine speed can be reduced by the operation of the misfire circuit to give a warning, and the output of the neutral switch or throttle Since the operating state of the misfire circuit is released by detecting the engine speed when fully closed, the internal combustion engine can be operated at a low rotational speed without preventing the internal combustion engine due to load fluctuation of the battery or noise.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an ignition device for a ship propulsion device to which the present invention is applied. In the figure, reference numeral 1 is a charging coil, 2 is a control unit, 3 is an ignition circuit, 10 is a pulser coil, 11 is an engine stop circuit, 18 is a holding circuit, 19 is an abnormality detection circuit, 20 is a neutral switch,
27 and 28 are batteries.

Claims (1)

[Claims] 1. An ignition circuit for controlling the output of a charging coil driven by the operation of an internal combustion engine based on a pulse signal output from a pulser coil in synchronism with the rotation of the internal combustion engine to generate a high voltage in the ignition coil, and a battery. In the ignition device of the marine vessel propulsion device, which includes an abnormality detection circuit that detects an abnormality of the internal combustion engine using the drive power source as a driving power source and an alarm circuit that issues an alarm based on the detection signal, the pulser coil, the ignition of the pulse signal by the operation of the kill switch. An engine stop circuit that regulates the input to the circuit and a misfire circuit that thins out the input of the pulse signal to the ignition circuit through the holding circuit by the operation of the abnormality detection circuit to reduce the rotation speed of the internal combustion engine are connected in parallel. The holding circuit receives the detection signal from the abnormality detection circuit or the detection signal from the battery detection circuit that detects detachment of the battery. It said misfire circuit actuates the ignition device of marine propulsion unit, characterized by being configured to release the operation held in the output or the throttle is fully closed in the engine speed detection of the neutral switch.