JPH03206357A - Burglarproof device for two wheeler - Google Patents

Abstract

PURPOSE:To improve a burglarproof effect by using an IG switch, having a check position for performing a check of an oil level warning lamp, and disa bling ignition action from functioning in the case of obtaining an on-position without passing through the check position. CONSTITUTION:An IG switch 30, provided with a check (C) position in the intermediate between on-, off-positions, is used. A CDI unit 1 is constituted by providing an ignition timing control circuit 2 for outputting an ignition signal to a thyristor 57 and a power supply control circuit 3. This power supply control circuit 3 is provided with a first control function for supplying power to an ignition timing control circuit 2 in the C-position of an IG switch 30 and further short-circuiting an output of a capacitor charging coil 51, a second control function for releasing short-circuiting of the output of the coil 51 when the on-position is obtained after passing through the C-position and a third control function for releasing the first and second control in the case of the IG switch 30 obtaining the on-position without passing through the C-position.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an anti-theft device for two-wheeled vehicles, and in particular to a CDI anti-theft device.
The present invention relates to an anti-theft device for two-wheeled vehicles that is suitable for two-wheeled vehicles equipped with an ignition device.

[Background technology]

FIG. 4 shows an example of a conventional CDI ignition system.

In FIG. 4, one end of the capacitor charging coil 51 of the magneto 50 is grounded, and the other end is connected to the CDI unit 52.
is connected to an ignition capacitor 53 via a rectifying diode 54. An ignition coil 55 and a spark plug 56 are provided on the other end side of the ignition capacitor 53. Further, the ignition capacitor 53 is connected to the circuit connecting the ignition capacitor 53 and the diode 54.
The anode side of a thyristor 57 for discharge control is connected, and the cathode side of this thyristor 57 is grounded.

The output side (other end side) of the capacitor charging coil 51 is "closed" when the ignition switch 60 is "OFF".
It is designed to be grounded via an OFF position circuit.

In an ignition device having such a structure, when the ignition switch 60 is turned on (ON), an ignition signal is applied from an ignition timing control circuit (not shown) to the gate of the thyristor 57, and the thyristor 57 is turned on (○N). becomes J,
The electrical energy charged by the output of the capacitor charging coil 51 and stored in the ignition capacitor 53 is instantly discharged through the thyristor 57 and the primary side of the ignition coil 55, and this rapid current change causes the electrical energy to be discharged to the secondary side of the ignition coil 55. High voltage is generated and the spark plug 56
An electric spark is generated. In this way, ignition was performed at a predetermined ignition timing.

On the other hand, when the ignition switch is rOFFJ, the output of the capacitor charging coil 51 is short-circuited, so ignition is not performed and the engine is stopped. For this reason, theft could be prevented by turning the ignition switch 60 OFF and removing the ignition key.

[Problems to be Solved by the Invention] However, in the above conventional example, the ignition key is turned off. Even if the ignition switch 60 is unplugged at the position shown in FIG. Therefore, there was an inconvenience that it was easily stolen.

[Object of the Invention] An object of the present invention is to improve the disadvantages of the conventional example, and in particular, to solve the problem of cutting the lead wire. To provide a theft prevention device for a two-wheeled vehicle that can effectively prevent a vehicle equipped with the device from being stolen by modifying an ignition switch circuit by direct connection or the like.

[Means to solve the problem]

The present invention provides an ignition capacitor that is charged by an electromotive force generated in a capacitor charging coil of a magneto, a semiconductor switching element that controls discharging of this ignition capacitor, and an ignition signal that outputs an ignition signal as a control signal to this semiconductor switching element. It is equipped with an ignition timing control circuit. Further, this ignition timing control circuit is provided with a power supply control circuit that supplies power for driving the ignition timing control circuit as necessary, and the power supply control circuit is connected to the power source via an ignition switch. There is. This ignition switch is in the on position. It has an off position and a check position located between these two positions. The power supply control circuit has a first control function of supplying power to the ignition timing control circuit and short-circuiting the output of the capacitor charging coil at the check position of the ignition switch, and a first control function of supplying power to the ignition timing control circuit and short-circuiting the output of the capacitor charging coil when the ignition switch is in the check position. The second control function releases the output short circuit of the capacitor charging coil while maintaining the power supply state to the ignition timing control circuit when the ignition timing control circuit is turned on. 1, and a third control function that cancels the second control function.

This is intended to achieve the above-mentioned purpose.

[Embodiments of the invention] An embodiment of the present invention will be described below with reference to FIG.

Here, regarding the structural precepts that are the same as the conventional example described above,
The same symbols shall be used.

The embodiment shown in FIG. 1 includes a magneto 50, a CDI unit 1 provided on the output side of a capacitor charging coil 5l of the magneto 50, and an ignition switch connected to the CDI unit 1 and the capacitor charging coil 51. 30, and a battery 40 as a power source whose positive side is connected to the ignition switch 30 via a fuse 41.

In this embodiment, the ignition switch 30 is set to the ON position, the OFF position, and the ignition switch 30.
A device having a check position located between these two (hereinafter referred to as "C position") is used. This C position is for checking the oil level warning light 42 as will be described later.

The CDI unit 1 is connected to the capacitor charging coil 51 of the magneto 50 and the capacitor charging coil 51 is connected to the capacitor charging coil 51 of the magneto 50.
The ignition capacitor 5 is charged by the electromotive force generated in
3, a thyristor 57 as a semiconductor switching element that controls the discharge of this ignition capacitor 53, an ignition timing control circuit 2 that outputs an ignition signal as a control signal to this thyristor 57, and a thyristor 57 that is installed in parallel with this ignition timing control circuit 2. The ignition timing control circuit 2 also includes a power supply control circuit 3 for supplying power for driving the ignition timing control circuit 2 as necessary.

To explain this in more detail, one end of the ignition capacitor 53 is connected to the output line of the capacitor charging coil 51 of the magneto 50 via a rectifying diode 54, and the other end is connected to the ignition coil 55 and the ignition plug 56. It is connected. Further, the anode of a thyristor 57 is connected to a circuit connecting the ignition capacitor 53 and the diode 54, and the cathode of the thyristor 57 is grounded. The output line of the ignition timing control circuit 2 is connected to the gate of the thyristor 57.

The ignition timing control circuit 2 includes a pickup coil 5 that generates an ignition timing signal (voltage pulse) as the magneto 50 passes a predetermined rotational position of a rotor (not shown).
2 output lines are connected.

The power supply control circuit 3 has a cathode connected to the ignition timing control circuit 2 and an anode connected to the battery 40 via the C position circuit (or ON position circuit) of the ignition switch 30. a common emitter transistor 5 whose collector is connected to the gate of the thyristor 4, a capacitor 6 connected in parallel between the collector terminals of the transistor 5, and a high potential side of the capacitor 6. and a thyristor 7 for misfire, the gate of which is connected to the thyristor 7 through a resistor 8. The anode of this thyristuff is connected to the circuit connecting the rectifying diode and the ignition capacitor described above, and its cathode is grounded. A resistor 9 is connected in parallel between the anode and gate of the thyristor 4. Further, a voltage dividing resistor 10 is provided between the emitter and the terminal of the transistor 5,
The high potential side of this voltage dividing resistor 10 is connected to the anode side of the thyristor 4 described above via another voltage dividing resistor l1. The connection point between these voltage dividing resistors 10 and 11 is grounded via the backflow prevention diode 12 and the C position circuit of the ignition switch 30. The output side of the capacitor charging coil 51 is connected to the ignition switch 30 as in the conventional example described above.
It is designed to be grounded via the OFF position circuit.

The intermediate point of the power supply circuit from the C position circuit (or ON position circuit) of the ignition switch 30 to the thyristor 4 for power supply control branches, and one end of the oil level warning light 42 is connected to the branched end. The other end of the warning light 42 is connected to the ignition switch 30
It is designed to be grounded via the C position circuit.

The other end of this oil level warning light 42 is grounded via an oil level switch 43. Therefore, the oil health isochi 43 is turned off.
When the ignition switch 30 is set to the C position in this state, the battery (+) → ignition switch 3
0 → Oil level warning light 42 → Ignition switch 3
A closed circuit is established from 0→earth→basoteri (-), and the disconnection light of the oil level warning light 42 is thereby checked.

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

When the rotor (not shown) of the magneto 50 rotates, an electromotive force is generated in the capacitor charging coil 51, but when the ignition switch 30 is turned off. In this case, as in the conventional example, since the output side of the capacitor charging coil is grounded, the ignition capacitor 53 is not charged, so ignition is not performed. In this case, the power supply control circuit 3
is not connected to the battery 40, the transistor 5, thyristor 4, and thyristor 7, which constitute the power supply control circuit 3, all remain in the FFJ state.

Next, when the ignition switch 30 is set to the C position, the battery 40 is connected to the thyristor 4 of the power supply control circuit 3, and the power supply current flows to the capacitor 6 via the resistor 9, charging the capacitor 6. Ru. When this capacitor 6 is charged to a certain extent, this voltage reaches the operating voltage of the thyristor 4.7, a gate current flows through the thyristor 4.7, and the thyristors 4.7 are both turned on. Therefore, Xa is supplied to the ignition timing control circuit 2. At this time, the alternating current (electromotive force) generated in the capacitor charging coil 51 is rectified by the diode 54, and the ignition capacitor 53 is charged by this current, but as described above, the misfire thyristor 7 is in the "ON" state. Therefore, the high potential side of the ignition capacitor 53 is grounded, the ignition capacitor 53 is discharged before the voltage rises much, and the output side of the capacitor charging coil 51 is grounded by turning the thyristorph on. Since the ignition capacitor 53 is not charged, ignition is not performed in this case as well. In this case, the power supply current also flows through the voltage dividing resistor 11, but since the cathode side of the diode 12 is grounded, the transistor 5 remains rOFFJ.

Next, when the ignition switch 30 is set to rONJ,
The cathode side of the diode 12 is no longer grounded, the power supply current flows through the voltage dividing resistor 11.10, the base-to-edge terminal of the transistor 5 reaches the operating potential of the transistor 5, a base current flows, and the transistor 5 becomes rONJ. Therefore, when the capacitor 6 is discharged and the potential of the capacitor 6 is lowered, the gate current of the thyristorph stops flowing, and when the voltage of the ignition capacitor 53 becomes zero (0), the thyristor 7 is turned off.

At this time, thyristor 4 has an anode current (power supply current)
Since the gas continues to flow, it remains turned on and ready for ignition. That is, in this state, when the ignition capacitor 53 is charged as described above by the electromotive force generated in the capacitor charging coil 51, and the voltage pulse generated in the pisokup coil 52 is output to the ignition timing control circuit 2, The ignition timing control circuit 2 receives this voltage pulse, performs predetermined signal processing, and transmits the ignition signal to the thyristor 57.
output to the gate. As a result, the anode and cathode of the thyristor 57 are electrically connected, and the electric energy stored in the ignition capacitor 53 is instantaneously discharged through the thyristor 57 and the primary coil 55a of the ignition coil 55. This rapid current change in the primary coil 55a induces a high voltage that rises quickly in the secondary coil 55b.

This high voltage generates an electric spark between the electrodes of the spark plug 56, causing ignition. When the discharge of the ignition capacitor 53 is finished, the thyristor 57 is cut off, and the ignition capacitor 53 is charged again.

FIG. 2 shows the transistors 5 and 5 in each case described above.
The relationship between the operation pattern of the thyristor 4.7 and the position of the ignition switch 30, and whether or not ignition is possible are shown.

On the other hand, if the ignition switch 30 is turned "ON" without passing through the C position, the transistor 5 becomes "○N" in the same manner as described above, but in this case, the potential of the capacitor 6 changes to the thyristor 4. , 7, the transistor 5 is turned ON before reaching the operating potential of the thyristor 4.7, and the thyristor 4.7 is not turned on but remains in the < rOFFj state, and power is not supplied to the ignition timing control circuit 2, so the pickup coil Even if the thyristor 52 outputs a voltage pulse to the ignition timing control circuit 2, an ignition signal is not output to the thyristor 57, so ignition is not performed. In Figure 3,
In this case, the relationship between the operation pattern of the transistor 5 and the position of the ignition switch 30, and whether or not ignition is possible are shown.

As described above, the power supply control circuit 3 has the function of supplying power to the ignition timing control circuit 2 and short-circuiting the output of the capacitor charging coil when the ignition switch 30 is in the C position (first control function). A function (second control function) that releases the output short circuit of the capacitor charging coil 51 while maintaining the power supply state to the ignition timing control circuit 2 when the ignition switch 30 is set to the "ON" position after passing the C position. On the other hand, if the ignition switch 30 does not pass through the C position but reaches the "ON" position, the first. It has a function (third control function) for canceling the second control function.

According to the present embodiment described above, when a vehicle equipped with this is parked with the ignition switch 30 in the OFF position and the ignition key removed, the ignition switch circuit is modified for the purpose of stealing the vehicle. If the lead wire is disconnected completely or selectively disconnected and connected, ignition will not occur, and in addition to selective disconnection and connection, the C position circuit will be disconnected after connection, resulting in complicated modifications. has become essential, and in this respect, theft has become extremely difficult.

In addition, in the above embodiment, in order to simplify the additional parts, the case where the check circuit of the oil level warning light 42 is also used as the check position circuit was exemplified, but the present invention is not limited to this, and a dedicated A check circuit may be provided.

[Effects of the Invention] As explained above, according to the present invention, in order to ignite, the ignition switch must be turned to the rOFF position.
Check position" → rON position", and then set the first control function of the power supply control circuit, followed by the second control function.
On the other hand, if rONJ occurs without passing the checkpoint, the third control function of the power supply control circuit will make ignition impossible. In order for someone without an ignition key to ignite the engine, a complex modification is required, which involves selectively disconnecting and connecting the lead wires, as well as connecting and then disconnecting the check position circuit. On the other hand, the cheseok position is rOFF. and "ON", so it is convenient for vehicle owners to switch from "OFF." to "ON" as before.
” Just turn the ignition key and no complicated operations are required.

Therefore, it is possible to provide an unprecedented and superior anti-theft device for two-wheeled vehicles, which can effectively prevent theft of a vehicle equipped with the same and does not require any special operations from the vehicle owner.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and Fig. 2 shows a power supply control circuit when the ignition switch in Fig. 1 passes through the check position and is turned on. An explanatory chart showing the relationship between the operation pattern of each transistor, each position of the ignition switch, and whether or not ignition is possible. Figure 3 shows the case where the ignition switch in Figure 1 is turned "ON" without passing through the check position. FIG. 4 is an explanatory diagram showing an example of a conventional ignition device. 2...Ignition timing control circuit, 3...Power supply control circuit, 30...Ignition switch, 40...Hattery as N source, 50...・
... Magneto, 51 ... Capacitor charging coil, 53 ... Ignition capacitor, 57 ...
...Sirisk as a semiconductor switching element.

Claims (1)

[Claims] (1) An ignition capacitor that is charged by the electromotive force generated by the magneto's capacitor charging coil, a semiconductor switching element that controls the discharge of this ignition capacitor, and an ignition signal that is output as a control signal to this semiconductor switching element. and an ignition timing control circuit, and the ignition timing control circuit is provided with a power supply control circuit that supplies power for driving the ignition timing control circuit as necessary, and the power supply control circuit is connected to the ignition timing control circuit via an ignition switch. The ignition switch is connected to a power source, and the ignition switch has an on position, an off position, and a check position located between these two positions, and the power supply control circuit controls the ignition timing control circuit when the ignition switch is in the check position. The first
and a second control function that releases the output short circuit of the capacitor charging coil while maintaining the power supply state to the ignition timing control circuit when the ignition switch is in the on position after passing the check position; A theft prevention device for a two-wheeled vehicle, comprising a third control function that cancels the first and second control functions when the ignition switch is turned on without passing through a check position. .