JPH0447692A - Capacitor charge-discharger type ignition device - Google Patents

Abstract

PURPOSE:To prevent forgetting to fold a side stand by having a series circuit comprising resistance and a Zener diode both of which are connected between one end of an exciter coil and a thyristor gate, and externally outputting terminal at the mutually connected point of the resistance and the Zener diode. CONSTITUTION:When a user forgets to fold a side stand and a side stand switch S/S SW is turned OFF while a side stand terminal is Open, the output of an exciter coil EXT passes through resistance R3 and a Zener diode Z2 to cause arc firing of a thyristor S2, so that an igniting capacitor C1 may lose its firing without being charged with electricity whereby an motorcycle refuses to go into operation. But when the side stand is folded and the side stand switch S/S SW is turned ON to set the side stand terminal in a mode of GND, the output of the exciter coil EXT passes through the resistance R3 to flow into the GND so that the thyristor S2 does not cause its arc firing and consequently the capacitor C1 is charged with electricity to cause its normal ignition. Whereby the motorcycle goes into operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a capacitor charging/discharging type ignition device that is equipped with a regulator circuit that controls the charging voltage of an ignition capacitor, by adding a simple circuit to the regulator circuit. This invention relates to a capacitor charging/discharging type ignition device that has a function to prevent forgetting to fold.

Figure 1 is a circuit diagram of a conventional capacitor charge/discharge type ignition system, where ■ is the main circuit, ■ is a regulator circuit that controls the charging voltage of the ignition capacitor, ■ is an ignition timing control circuit, and ■
is a circuit that prevents you from forgetting to fold the side stand. The positive half wave of the exciter coil EXT charges the ignition capacitor C1 through the rectifying diode D2, and the negative half wave of the exciter coil EXT passes through the commutation prevention diode Dl of the exciter coil EXT.
Return to. Next, when the ignition timing control circuit operates according to the signal from the pulser coil PC and an ignition signal is generated, the thyristor S1 is fired, discharging the charge in the capacitor C1, and generating an ignition pulse in the ignition coil Ign, C. A spark was being generated at the plug SP. At this time, the positive half-wave voltage of the exciter coil EXT is divided by the resistors R1 and R2, and when the divided voltage exceeds the Zener voltage of the Zener diode Z2, the regulator thyristor S2 is fired, and the exciter coil EXT is The positive half-wave output is short-circuited. As a result, the charging voltage of the ignition capacitor C1 is controlled at a constant voltage, and the capacitor CI
, diodes D1, D2, and thyristor S1 can be prevented from being destroyed by overvoltage.

Next, the function of the side stand forgetting prevention circuit is to prevent the motorcycle from starting with the side stand forgotten to be folded.When the side stand is forgotten to be folded, the side stand switch S/S S
When W is OFF, the side stand terminal is in oven mode, and the side stand forget-to-fold prevention circuit is activated.
The ignition signal of the ignition timing control circuit is short-circuited by the transistor Q1.

As described above, the thyristor S1 does not fire, and when the side stand is forgotten to be folded, the engine is stopped, and the autopilot does not start. Also, when the side stand is folded, that is, the side stand switch S/5
When SWfJ (ON) and the site stand terminal is in LOW mode, the side stand forget-to-fold prevention circuit does not function.
Sl is ignited and the first and second cars can start. However, adding a circuit to prevent forgetting to fold the side stand increases the number of electronic components that make up the capacitor charging/discharging type ignition device, resulting in an increase in size and cost.

In order to solve the above-mentioned drawbacks, the present invention provides a capacitor charging/discharging type ignition device that can prevent forgetting to fold the side stand by simply adding a simple circuit to the regulator circuit for charging and charging the ignition capacitor. .

Hereinafter, the present invention will be explained using the drawings.

FIG. 2 is a circuit diagram of one implementation of the present invention, where ■ is the main circuit, ■ is a regulator circuit that controls the charging voltage of the ignition capacitor C1, ■ is an ignition timing control circuit, and ■ is an addition to the regulator circuit. Dl is a diode for preventing commutation of the positive half-wave output of the exciter coil EXT, and D2 is a coil that can prevent forgetting to fold the side stand.
is the rectifier diode of the exciter coil EXT, C1
is the ignition capacitor, and Sl is the ignition capacitor C1.
discharge thyristor, S2 is exciter coil EXT
A thyristor short-circuits the positive half-wave output, Zl is a Zener diode that determines the control voltage of the regulator circuit, and R
1. R2 is a resistor that divides the exciter coil EXT output, Z2 is a Zener diode for determining the side stand forget-to-fold prevention circuit, and R3 is the exciter coil EXT.
Output current control resistor, EXT is exciter coil,
PC is a pulser coil, Ign, C is an ignition coil, SP is a spark plug, and S/SSW is a side stand switch.

Next, the operation of the present invention will be explained.

The positive half-wave output of the exciter coil EXT charges the capacitor C1 and becomes the ignition energy, but I forgot to fold the side stand and switched the side stand switch S.
/S SW is OFF' and the side stand terminal is 0p.
In case of en, exciter coil EXT output is resistor R3
By passing through the Zener diode Z2 and igniting the thyristor S2, the ignition capacitor C1 misfires without being charged. Therefore, the motorcycle will not start.

Finally, fold the side stand, set the side stand switch S/SSW to ONL, and set the side stand terminal to G.
In the ND mode, the output of the exciter coil EXT passing through the resistor R3 falls to G N'D, so that the capacitor C1 is charged and normally ignited. Therefore, Odubai takes off. Here, the role of the Zener diode Z2 is to prevent erroneous firing of the thyristor S2 due to a single-handed resistance or the like when the side stand switch S/S switch is OFF. It goes without saying that when the side stand switch S/S SW is ON, the regulator circuit for controlling the charging voltage of the ignition capacitor C1 can operate normally.

In this way, by adding a simple circuit to the regulator circuit of the ignition capacitor, a capacitor charging/discharging type ignition device that can prevent the id stand from being forgotten to be folded without impairing the function of the regulator circuit can be practically used. The effect is large.

[Brief explanation of the drawing]

FIG. 1 is a conventional capacitor charge/discharge type ignition device, and FIG. 2 is a circuit diagram of an embodiment of the present invention. In the figure, ■ is the main circuit, ■ is the regulator circuit for controlling the charging pressure of the ignition capacitor, ■ is the ignition timing control circuit,
■ is a side stand folding prevention circuit, Di, D2 are diodes, Sl, S2 are thyristors, zl, Z2 are Zener diodes, CI is a capacitor, R1, R2, R
3 is a resistor, EXT is an exciter coil, PC is a pulser coil, and Ign. C is the ignition coil, SP is the spark plug, and S/S SW is the side stand switch.

Claims (1)

[Claims] A main circuit that discharges the charge of a capacitor charged by an exciter coil to an ignition coil via a first thyristor fired by a pulser signal that detects a synchronization signal of engine speed, and detects the exciter output. In a capacitor charging/discharging type ignition device including a regulator circuit that short-circuits the exciter output via a thyristor (second) to control the charging voltage of the ignition capacitor, one end of the exciter coil and the thyristor (second) are provided. 2) A capacitor charge/discharge type ignition device comprising: a series circuit of a resistor and a Zener diode connected between gates; and an external output terminal connected to a connection point of the resistor and Zener diode.