JPS6346678U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a first embodiment of the present invention;
Figure 2 is a waveform diagram showing the signal waveforms of each part in Figure 1;
FIG. 3 is a diagram showing an example of the ignition characteristics obtained by the present invention, and FIG. 4 is a circuit diagram showing a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Ignition circuit, 2... Power supply circuit, 3... Signal generation circuit for internal combustion engine ignition device, 300... Signal coil, 301... First waveform shaping circuit, 302...
...Second waveform shaping circuit, 303...Advance position signal generation circuit, 304...Ignition interval signal generation circuit, C
4...Ignition interval signal generation capacitor, Tr2...
...Transistor forming a capacitor charging/discharging switch circuit, Tr3...Transistor forming a capacitor discharging switch circuit, 305...Advance angle calculation circuit, C5...First lead angle calculation capacitor,
C6...Second advance angle calculation capacitor, CM1...
... Comparison circuit, 306 ... Retard angle calculation circuit, C7 ...
Retard angle calculation capacitor, R15 to R18...Resistor, D5...Diode, CM2...Comparison circuit, 3
07...Ignition timing signal output circuit, A1...
AND circuit, OR1...OR circuit.

Claims (1)

[Claims for Utility Model Registration] An advance angle position signal generation circuit that outputs a first signal and a second signal at a maximum advance angle position and a minimum advance angle position, respectively, of an internal combustion engine; an ignition interval signal generation circuit that receives a signal as input and outputs an ignition interval signal that lasts from the generation of the first signal until the generation of the second signal; an advance angle calculation circuit that outputs an advance ignition position signal whose rising position changes continuously from the minimum advance position to the maximum advance position as the rotational speed increases; a retard calculation capacitor; A capacitor charging circuit for retard calculation that charges the calculation capacitor at a constant time constant, an additional charging circuit that additionally charges the retard calculation capacitor in the period in which the ignition interval signal is generated, and A retard angle calculation capacitor discharging circuit that instantly discharges the angle calculation capacitor and an integrated voltage obtained across the retard angle calculation capacitor are compared with a reference voltage to determine whether the terminal voltage of the retard angle calculation capacitor is higher than the reference voltage. a retard calculation circuit that outputs a retard ignition position signal when the retard ignition position signal is reached; and an ignition timing signal that generates an ignition timing signal that determines the ignition position of the internal combustion engine when the AND of the retard ignition position signal and the advance ignition position signal is satisfied. In the signal generation circuit for an internal combustion engine ignition device, the ignition interval signal generation circuit is electrically connected to an ignition interval signal generation capacitor when the first signal is generated to cause the ignition It consists of a capacitor charging switch circuit that instantaneously charges the section signal generating capacitor, and a capacitor discharging switch circuit that becomes conductive when the second signal is generated and instantly discharges the ignition section signal; A signal generation capacitor is connected in parallel to the retard calculation capacitor via a diode and a resistor, and the additional charging circuit is configured by the ignition interval signal generation capacitor, the diode, and the resistor. Signal generation circuit for internal combustion engine ignition system.