JP2841564B2 - Anti-theft device for motorcycles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a motorcycle anti-theft device, and particularly to a CDI
The present invention relates to a motorcycle anti-theft device suitable for a motorcycle having an ignition device.

(Background technology)

FIG. 2 shows an example of a conventional CDI ignition type ignition device.

In FIG. 2, one end of a capacitor charging coil 51 of the magneto 50 is grounded, and the other end is connected to an ignition capacitor 53 of the CDI unit 52 via a rectifying diode 54. On the other end of the ignition capacitor, an ignition coil 55 and a spark plug 56 are provided side by side. A circuit for connecting the ignition capacitor 53 and the diode 54 has a thyristor for controlling the discharge of the ignition capacitor 53.
The anode side of the thyristor 57 is connected, and the cathode side of the thyristor 57 is grounded.

The output side (the other end side) of the capacitor charging coil 51 is grounded via an OFF position circuit that is closed when the ignition switch 60 is turned off.

In the ignition device having such a configuration, when the ignition switch 60 is turned "ON", an ignition signal is applied to the gate of the thyristor 57 from an ignition timing control circuit (not shown), and the thyristor 57 is turned "ON". The ignition capacitor is charged by the output of the capacitor charging coil 51.
The electric energy stored in 53 is instantaneously discharged through the thyristor 57 and the primary side of the ignition coil 55, and a sudden change in the current causes a high voltage to be generated on the secondary side of the ignition coil 55. Occurs. Thus, ignition has been performed at a predetermined ignition timing.

On the other hand, when the ignition switch is “OFF”, the output of the capacitor charging coil 51 is short-circuited, so that ignition is not performed and the engine stops. For this reason, if the ignition switch 60 is set to "OFF" and the ignition key is removed, theft can be prevented.

As an improvement of FIG. 2, there is an ignition device shown in FIG.

3 is provided with an ignition switch 70 in place of the ignition switch 60 in FIG.
The output side of the capacitor charging coil 51 is connected to the CDI unit 52 via an ON position circuit. Other configurations are the same as those in FIG. In this case, similarly, if the ignition key is removed, theft can be prevented.

[Problems to be solved by the invention]

However, in the conventional example shown in FIG. 2, even if the ignition key is pulled out at the “OFF” position, if part or all of the lead wire of the ignition switch 60 is cut with pliers or the like, , Capacitor charging coil
Since the output side of the 51 is no longer grounded, the ignition becomes possible and the engine can be started. Therefore, as a countermeasure, the one shown in FIG. 3 was devised. In this case, however, it is necessary to interrupt the current of the high voltage circuit by the ignition switch 70. There is an inconvenience that it is necessary to take countermeasures against malfunction of the 52, destruction of the CDI unit 52 and the like, and measures such as withstand voltage of the ignition switch 70.

[Object of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to improve the disadvantages of the conventional example, and in particular, to effectively prevent theft of a vehicle equipped with the same, and to provide an ignition device without requiring any special measures such as a pressure resistance of an ignition switch. It is an object of the present invention to provide a motorcycle anti-theft device capable of enabling or disabling a vehicle.

[Means for solving the problem]

According to the present invention, an ignition capacitor connected to a capacitor charging coil of a magneto and charged by an electromotive force generated in the capacitor charging coil, a semiconductor switching element for controlling discharge of the ignition capacitor, and a control for the semiconductor switching element And an ignition timing control circuit that outputs an ignition signal as a signal. A side stand switch that is closed when the side stand of the vehicle is in the upright stored state and is opened when the vehicle is not in the upright stored state; and a side switch that is connected in parallel to the side stand switch and is closed when engine rotation is not transmitted to the drive wheels. And a side stand interlock circuit including another switch that is opened when transmitted. Then, an ignition switch connected to the CDI ignition device via a lead wire makes the ignition impossible by short-circuiting the lead wire, and opens the lead wire and interlocks the side stand interlock circuit and the CDI ignition device. And an on-position circuit that enables ignition by connecting the The side stand interlock circuit has a function of short-circuiting an ignition signal to the semiconductor switching element to disable ignition when both the side stand switch and another switch are opened. This aims to achieve the above-mentioned object.

(Example of the invention)

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

The embodiment shown in FIG. 1 is an ignition capacitor 53 connected to a capacitor charging coil 51 of a magnet 50 and charged by an electromotive force generated in the capacitor charging coil 51.
And a thyristor 57 as a semiconductor switching element for controlling the discharge of the ignition capacitor 53, and an ignition timing control circuit 2 for outputting an ignition signal to the thyristor 57 as a control signal. Have. The vehicle also includes a side stand switch 3 for detecting an upright stored state of a side stand of the vehicle (not shown), and a neutral switch 4 which is connected in parallel to the side stand switch 3 and is another switch for detecting intermittent connection of the engine rotation to the driving wheels. Is provided with a side stand interlock circuit 5 composed of: The side stand interlock circuit 5 is connected to the CDI ignition device 1 via an ON position circuit that is closed when the ignition switch 70 is turned on.

More specifically, the CDI igniter 1 includes a capacitor charging coil 51 of a magnet 50 having one end grounded, a CDI unit 10 connected to the other end of the capacitor charging coil 51, and a CDI unit 10. An ignition coil 55 and a spark plug 56 are provided on the other end side. The CDI unit 10 includes a capacitor charging coil 5
A rectifying diode 54 whose anode side is connected to the output terminal of the first, an ignition capacitor 53 whose one end is connected to the cathode side of the rectifying diode 54, and this ignition capacitor 53 and the diode 54 are connected. A thyristor 57 whose anode side is connected to the circuit to be grounded and whose cathode side is grounded, and an ignition timing control circuit 2 which outputs an ignition signal as a control signal of the thyristor 57 are provided.
The ignition timing control circuit 2 is provided with a pickup coil 6 that generates a voltage pulse as the magnet 50 passes a predetermined rotational position of a rotor (not shown). One end of the ignition timing control circuit 2 is connected to a circuit for connecting the above-mentioned ignition capacitor 53 and the diode 54, and the other end of the ignition timing control circuit 2 is connected to a thyristor.
The gate of the transistor 57 is connected to the collector of the transistor 7 whose emitter is connected to the collector. The point A in FIG. 1 of the circuit for connecting the ignition capacitor 53 and the diode 54 is connected to one end of the ON position circuit of the ignition switch 70 via a relatively large resistor 8. The point B shown in the drawing of the resistor 8 on the side of the ignition switch 70 is connected via a resistor 9 to the gate of another transistor 11 whose collector is connected to the base of the transistor 7 described above. A capacitor 12 and a resistor 13 are connected in parallel between the base and the emitter of the transistor 11. A resistor 14 is interposed between the collector and the base of the transistor 7. The output side of the capacitor charging coil 51 is grounded via the OFF position circuit of the ignition switch 70 as in the above-described conventional example.

On the other hand, the side stand interlock circuit 5
One end is connected to the other end of the ON position circuit of the ignition switch, and the other end is grounded, and a neutral switch is connected in parallel to the side stand switch 3 via a backflow preventing diode 15 to the side stand switch 3. 4.
Here, the contact of the side stand switch 3 is opened when a side stand (not shown) is upright, and the contact is closed when a stowed state of the side stand (state during running) is detected. I have. When the neutral switch 4 detects that the engine rotation is not transmitted to the drive wheels when the shift gear of the transmission (not shown) is in the “neutral” position, the contact is closed, and the shift gear is in another position, When the rotation is transmitted to the drive wheels, the contact is opened.

A neutral lamp 17 is connected to a non-ground end of the neutral switch 4 via a diode 16 for preventing backflow, and the other end of the neutral lamp 17 is connected to an ON position circuit of an ignition switch 70 and a fuse 18. Connected to the positive side of battery 19.

 Next, main operations of the above embodiment will be described.

When the rotor (not shown) of the magnet 50 rotates, an electromotive force is generated in the capacitor charging coil 51, and the resulting alternating current is rectified by the diode 54, and the ignition capacitor 53 is charged by this current. At this time, a voltage pulse is generated in the pickup coil 6, and this voltage pulse is output to the ignition timing control circuit 2. The ignition timing control circuit 2 receives this voltage pulse, performs predetermined signal processing, and outputs an ignition signal.

Here, when the ignition switch is “ON”, the side stand switch 3 is “open”, and the neutral switch 4 is “closed”, the potential at point B in the figure becomes zero and the transistor 11 is turned “OFF”. An ignition signal output from the ignition timing control circuit 2 flows to the base of the transistor 7 via the resistor 14 as a base current. As a result, the transistor 7 is turned “ON”, an ignition signal is applied to the gate of the thyristor 57, the anode and the cathode of the thyristor 57 conduct, and the electric energy stored in the ignition capacitor 53 is transferred to the thyristor 57 and the ignition coil. Discharge instantaneously through the 55 primary coil 55a. Due to the rapid current change of the primary coil 55a, the secondary coil 5
A fast rising high voltage is induced in 5b. An electric spark is generated between the electrodes of the ignition plug 56 by this high voltage, and ignition is performed. When the discharge of the ignition capacitor 53 ends, the thyristor 57 is turned off, and the ignition capacitor 53 is charged again.

In this case, if both the side stand switch 3 and the neutral switch 4 are “open”, the base current does not flow through the transistor 7 because the transistor 11 is in the “ON” state, and the transistor 7 is in the “OFF” state. is there. Therefore, no ignition signal is applied to the gate of the thyristor 57, so that ignition is not performed.

On the other hand, when the engine is stopped, the output of the capacitor charging coil 51 is short-circuited by turning off the ignition switch 70, so that the engine is stopped.

According to the above-described embodiment, when a vehicle equipped with the vehicle is parked with the ignition key pulled out at the position where the ignition switch 70 is "OFF", the lead wire of the ignition switch 70 is attempted to steal the vehicle. Is cut off, the output line of the capacitor charging coil 51 is no longer grounded, but the side stand interlock circuit 5 is in the "open" state, so that ignition is not possible. Therefore, in order to attempt theft, it is necessary to selectively disconnect and connect the lead wires of the ignition switch 70, and in this respect, theft is difficult.

Further, since a large resistor 8 is interposed in the circuit from the CDI unit 10 to the ignition switch 70, it is not necessary to take measures such as the withstand voltage of the ignition switch 70. In addition, the side stand interlock circuit 5 Since the circuit configuration is low voltage and small current, even if this circuit is opened and closed, malfunction of CDI unit 10
There is almost no risk of the DI unit 10 being destroyed.

Further, in this embodiment, the function of the side stand interlock circuit 5 allows the engine to be started while the side stand is standing up and the vehicle body is tilted, or when the vehicle is stopped, the side stand is raised and the body is tilted before starting the engine. If the transmission is other than neutral and the engine rotation can be transmitted to the drive wheels, such as when stopping the vehicle, the neutral switch is open. it can.

In the above-described embodiment, the case where the neutral switch 4 is used as another switch connected in parallel to the side stand switch 3 has been described. However, the present invention is not limited to this. In addition to this, a clutch switch for detecting engagement / disengagement of the clutch may be provided, or only a clutch switch may be provided.

〔The invention's effect〕

As described above, according to the present invention, in order to steal a vehicle equipped with the device according to the present invention during parking by pulling out the ignition key with the ignition switch `` OFF '',
If you cut the lead wire of the ignition switch,
Since the side stand interlock circuit is in the “open” state, the function of the side stand interlock circuit can make it impossible to ignite, and the circuit from the CDI ignition device to the ignition switch includes, for example, the circuit of the above embodiment. By providing such a large resistor, it is possible to eliminate the need for measures such as the withstand voltage of the ignition switch. Furthermore, since ignition is not possible if the side stand interlock circuit is in the "open" state, even if the lead wire around the side stand interlock circuit is cut and the lead wire is opened, ignition cannot be performed.

Therefore, it is impossible to steal unless the lead wire of the ignition switch is selectively disconnected and connected. In this respect, it is possible to effectively prevent the vehicle equipped with this from being stolen and to perform any special measures such as the pressure resistance of the ignition switch. It is possible to provide an excellent anti-theft device for a motorcycle, which can be set to enable or disable the ignition device without taking any measures.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention, FIG. 2 is an explanatory view showing an example of a conventional ignition device, and FIG. 3 is a conventional example of an ignition device obtained by improving the ignition device of FIG. FIG. 1 ... CDI ignition device, 2 ... ignition timing control circuit, 3 ...
Side stand switch, 4 ... Neutral switch as other switch, 5 ... Side stand interlock circuit, 50 ... Magneto, 51 ... Capacitor charging coil, 53 ... Ignition capacitor, 57 ... Thyristor as semiconductor switching element , 70 …… Ignition switch.

Claims (1)

(57) [Claims] An ignition capacitor connected to a capacitor charging coil of a magneto and charged by an electromotive force generated by the capacitor charging coil; a semiconductor switching element for controlling discharge of the ignition capacitor; and a semiconductor switching element. A CDI ignition device including an ignition timing control circuit that outputs an ignition signal as a control signal; and a side stand switch that is closed when the side stand of the vehicle is in the upright stored state and opened when the vehicle is not in the upright stored state. And a side stand interlock circuit, which is connected in parallel to the side stand switch and includes another switch that is closed when the engine rotation is not transmitted to the drive wheels and opened when the engine rotation is transmitted to the drive wheels, Ignition switch connected to ignition device via lead wire An off-position circuit that makes ignition impossible by short-circuiting the lead wire, and an on-position circuit that makes ignition possible by opening the lead wire and connecting the side stand interlock circuit and the CDI ignition device. Wherein the side stand interlock circuit has a function of short-circuiting an ignition signal to the semiconductor switching element to disable ignition when the side stand switch and another switch are both opened. Anti-theft device for motorcycles.