JPH021473U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a circuit block diagram of the ignition circuit of a four-cycle engine according to one embodiment of the present invention, Fig. 2 is a circuit diagram of a delay circuit in the same ignition circuit, and Fig. 3 is a circuit diagram of a four-cycle engine according to another embodiment of the present invention. A circuit block diagram of an ignition circuit of an engine, FIG. 4 is a circuit diagram of a delay circuit in another embodiment, FIG. 5 is a circuit block diagram of an ignition circuit of a conventional battery ignition system, and FIG. 6 is a circuit diagram of a conventional magnetic ignition system. FIG. 3 is a circuit block diagram of an ignition circuit according to the method. 1...Detector, 4, 19...Delay circuit, 5...
Igniter (ignition signal generation circuit), 6...Ignition coil, 7...Spark plug, 10...Transistor, 12...Capacitor, 17...Ignition signal generation circuit.

Claims (1)

[Claims for Utility Model Registration] (1) A detector that outputs a detection signal every revolution of the engine, an ignition signal generation circuit that generates an ignition signal based on the detection signal of this detector, and this ignition signal generation circuit. An ignition coil that supplies ignition voltage to the ignition plug near the top dead center of the piston each time the engine rotates based on the ignition signal from the circuit, and until a predetermined period of time has elapsed from the start of engine rotation when the engine starts. Alternatively, an ignition circuit for a four-cycle engine, comprising a delay circuit that prohibits output of an ignition signal from the ignition signal generation circuit until the engine rotates a predetermined number of times. (2) A delay circuit is inserted between the detector and the ignition signal generation circuit, and the delay circuit is configured to output the detection signal of the detector until a predetermined time elapses from the start of engine rotation when the engine starts, or until the engine rotates a predetermined number of times. An ignition circuit for a four-cycle engine according to claim 1, wherein the ignition circuit is configured such that the ignition signal is not supplied to the ignition signal generation circuit. (3) The delay circuit includes a transistor that transmits a detection signal from the detector to the ignition signal generation circuit, and a transistor that is charged by the detection signal from the detector and does not operate the transistor when the charging voltage is below a predetermined value. The ignition circuit for a four-stroke engine according to claim 2, which is a utility model registered, and has a structure including a capacitor. (4) The ignition circuit for a four-cycle engine according to claim 1 of the utility model registration, wherein the delay circuit is configured to detect the start of rotation of the engine by activation of the starter.