JPS6176165U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the ignition timing control device for an internal combustion engine according to this invention, Fig. 2 is a timing chart showing the operation of the same embodiment, and Fig. 3 is an ignition timing diagram of the embodiment shown in Fig. 1. FIG. 4 is a characteristic diagram showing the ignition timing advance characteristics with respect to engine speed in the embodiment shown in FIG. 1, and FIG. 5 shows the generation of reverse torque in the embodiment shown in FIG. 1. Timing chart to explain prevention, Part 6
The figure is a circuit diagram showing a conventional ignition timing control device for an internal combustion engine, FIG. 7 is a block diagram showing the ignition signal generation circuit part of the conventional device as described above, with blocks for each function, and FIG. 8 is a diagram showing the operation of the conventional device as above. Timing charts, FIGS. 9, 10, and 11 are time charts showing the ignition timing advance effect of the conventional device as above, respectively. FIG. 12 is a diagram showing the relationship between the crank angle position of the engine and the pulsar coil. FIG. 13 is a timing chart showing the output signal of the same pulser coil. 1... Generator, 1a... Exciter coil, 1b...
Pulsar coil, 2...Ignition coil, 3...
Spark plug, 4... Main circuit, 9a, 9b... First and second inverters, 10... NAND circuit, l... Power supply circuit, q... Pulse generation circuit, r... Rectangular wave generation circuit,
s...judgment circuit, t...triangular wave generation circuit, u...ignition signal generation circuit.

Claims (1)

[Scope of utility model registration request] a pulse generating circuit that outputs first and second pulse signals corresponding to predetermined crank angles; and a pulse generating circuit that outputs first and second pulse signals corresponding to predetermined crank angles; A rectangular wave generation circuit that generates a rectangular wave signal that falls with a gentle slope, and outputs an "O" level signal when the voltage level of the rectangular wave signal is above a predetermined level, and outputs "1" when the voltage level is below a predetermined level. a determination circuit that outputs a level signal; the determination circuit rises at a constant gentle slope at the output timing of the "1" level signal from the determination circuit; and immediately falls at a constant angle after the first pulse signal is generated; A triangular wave generating circuit that generates a triangular wave-like signal that changes to the "O" level at the generation timing of the second pulse signal, and an ignition signal when the output levels of the determination circuit and the triangular wave generating circuit are both at the "O" level. An ignition timing control device for an internal combustion engine, comprising an ignition signal generation circuit that generates an ignition signal.