Ignition system for internal combustion engine

An ignition system for an internal combustion engine comprising:

• a first series closed circuit including a series connection of a DC power supply, an energy storage coil and a first switching device;
• a second series closed circuit coupled to the energy storage coil, including a series connection of a first diode, a primary winding of an ignition coil and a second switching device;
• a series circuit including a series connection of a second diode and a capacitor in parallel to the second switching device;
• a third series closed circuit coupled to the primary winding of the ignition coil the second switching device, and the capacitor and including a third diode in series therewith;
• and
• switching device control means for charging the capacitor from the first series circuit including the energy storage coil and the primary winding of the ignition coil at a time of turning off of the second switching device, for turning on the first switching device to store energy in the energy storage coil from the DC power supply after charging of the capacitor, and for turning on the second switching device substantially at the same time as the first switching device at a subsequent ignition timing, thereby supplying the primary winding of the ignition coil with the energy stored in both the energy storage coil and the energy charged in the capacitor.

A high-energy ignition system comprising:

• an ignition coil for generating a high ignition voltage across its second winding when a current is supplied to a primary winding thereof,
• a capacitor,
• means for charging the capacitor,
• an energy storage coil,
• energy storage means for supplying a current to the energy storage coil to store energy therein, and
• energy supply means for supplying a single primary winding of the ignition coil at a predetermined timing with both the energy stored in the energy storage coil and the energy charged in the capacitor.

A high-energy ignition system comprising:

• an ignition coil for generating a high ignition voltage in its secondary when a current is supplied to its primary,
• a capacitor,
• an energy storage coil,
• energy storage means for periodically supplying the energy storage coil with a current,
• capacitor charging means for supplying and charging the capacitor with the energy stored in the energy storage coil at a first timing, and
• energy supply means for supplying the primary of the ignition coil with both the energy stored in the energy storage coil and the energy charged in the capacitor at a second timing retarded from the first timing.