Electricity: measuring and testing – Internal-combustion engine ignition system or device – In situ testing of spark plug
Reexamination Certificate
2006-02-14
2006-02-14
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Internal-combustion engine ignition system or device
In situ testing of spark plug
C324S388000, C123S406140
Reexamination Certificate
active
06998846
ABSTRACT:
The present feature of the invention is generally directed to a subsystem of an ignition diagnostics and feedback control system using ionization current feedback. It utilizes the ionization signal from an ionization detection circuit to monitor ignition parameters, such as primary charge timing, primary charge duration, ignition/spark timing, and ignition/spark duration for future “smart” ignition system control. In addition, the ionization signal is also used to detect spark plug carbon fouling, as well as plug insulator overheating. These parameters can be monitored for every cylinder of the engine for each engine cycle.
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Combined Search and Examination Report dated May 21, 2004 from the United Kingdom Patent Office (5 pages).
Daniels Chao F.
Gould Kenneth L.
Wang Bruce
Zhu Guoming G.
Deb Anjan
Dickinson Wright PLLC
Visteon Global Technologies Inc.
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