Multiple discharge ignition control apparatus and method for...

Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy

Reexamination Certificate

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C123S604000, C123S605000, C123S620000, C123S637000, C123S644000, C123S655000, C123S656000

Reexamination Certificate

active

07404396

ABSTRACT:
In a multiple discharge ignition control apparatus, a battery, an energy storage coil and a first IGBT are connected in series. Further, the energy storage coil, a diode, a primary coil and a second IGBT are connected in series. The energy storage coil is connected with a capacitor through the diode, and a secondary coil is connected with a spark plug and a resistor for current detection. An ignition control circuit switches the IGBTs between ON and OFF each time the secondary current detected by the resistor reaches a positive or negative discharge holding current in multiple discharge operation. A booster circuit is provided in addition to the energy storage coil and its output is feedback-controlled.

REFERENCES:
patent: 5056496 (1991-10-01), Morino et al.
patent: 6557537 (2003-05-01), Ikeda et al.
patent: 6675784 (2004-01-01), Nagase et al.
patent: 6725834 (2004-04-01), Yorita et al.
patent: 7100589 (2006-09-01), Toriyama
patent: 7121270 (2006-10-01), Plotnikov
patent: 8-4637 (1996-01-01), None

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