초록 ▼

A capacitor discharge ignition system is provided with a control arrangement to prevent operation of an engine at excessive speeds. For example, when the engine exceeds a predetermined speed of operation, the control arrangement is effective to terminate the generation of the ignition firing pulses

A capacitor discharge ignition system is provided with a control arrangement to prevent operation of an engine at excessive speeds. For example, when the engine exceeds a predetermined speed of operation, the control arrangement is effective to terminate the generation of the ignition firing pulses to the spark plug of the engine. The control arrangement includes a capacitor connected at one end to the cathode of an SCR switching device that controls the discharge of a charging capacitor into an ignition coil. The other end of the capacitor is connected in the triggering circuit of the SCR. The capacitor discharge ignition system is arranged to charge the charging capacitor during a first half cycle of operation of one polarity and subsequently to discharge the capacitor into the ignition coil by triggering the SCR during the following half cycle of operation of opposite polarity. The charging of the capacitor and the triggering of the SCR are controlled by voltage and current waveforms generated by a control winding that is disposed on a ferromagnetic core. The ferromagnetic core is positioned adjacent the rotating magnetic field that is developed for example by a permanent magnet carried by the flywheel of the engine.

대표청구항 ▼

In a capacitor discharge ignition system for use with and for positioning adjacent a flywheel of an engine that generates a rotating magnetic field provided by a permanent magnet carried by the flywheel, the combination of: means for generating in response to each passage of the permanent magnet and

In a capacitor discharge ignition system for use with and for positioning adjacent a flywheel of an engine that generates a rotating magnetic field provided by a permanent magnet carried by the flywheel, the combination of: means for generating in response to each passage of the permanent magnet and in operative sequence a charging supply and a triggering supply in response to induced voltages and currents resulting from the rotating magnetic field, said generating means comprising a control winding; ignition coil means for receiving energy and for generating an ignition voltage in response to received energy; and means responsive to said generating means and being charged in response to said charging supply for storing said energy delivered from said charging supply and for controlling the discharge of said stored energy into said ignition coil means, said storing and discharge controlling means comprising engine speed control means for inhibiting the charging of said storing and discharge controlling means when the speed of the engine exceeds a predetermined speed, said storing and discharge controlling means comprising electronic switch means having a control connection, said engine speed control means comprising resistive-capacitive circuit means being connected to said triggering supply and said control connection for rendering said electronic switch means conductive to discharge said stored energy into said ignition coil means when the speed of the engine is less than said predetermined speed and for maintaining said electronic switch means conductive when the speed of the engine exceeds said predetermined speed from one revolution of the flywheel to the next revolution of the flywheel and from one occurrence of said triggering supply throughout at least the duration of the next occurrence of said charging supply.