Internal-combustion engines – High tension ignition system – Safety device
Reexamination Certificate
2006-11-21
2006-11-21
Wolfe, Willis R. (Department: 3747)
Internal-combustion engines
High tension ignition system
Safety device
C324S388000
Reexamination Certificate
active
07137385
ABSTRACT:
This feature of the present invention comprises a method and apparatus that provides a regulated power supply for in-cylinder ionization detection by harvesting the excess ignition coil leakage and magnetizing energy immediately following the turn off of the ignition coil IGBT. It uses an additional energy storage capacitor which replaces a first capacitor as the primary energy storage device. Thus, this feature of the present invention uses a two step method for charging the ionization detection circuit, as opposed to just one stage. The second capacitor is charged first, typically up to 400 Volts DC, and is then used as a reservoir to charge the first capacitor.
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Dickinson Wright PLLC
Hoang Johnny H.
Visteon Global Technologies Inc.
Wolfe Willis R.
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