Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2006-08-08
2006-08-08
Wolfe, Willis R. (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S406210, C123S406480, C701S103000, C701S108000, C073S116070, C073S118040
Reexamination Certificate
active
07086382
ABSTRACT:
This feature of the present invention is a robust multi-criteria minimum timing for the best torque (MBT) timing estimation method and apparatus utilizing different ionization signal waveforms that are generated under different engine operating conditions. This feature of the present invention determines and combines multiple MBT timing criteria to increase the reliability and robustness of MBT timing estimation based upon spark plug ionization signal waveforms. In a preferred embodiment, the present invention combines MBT timing estimation criteria comprising a maximum flame acceleration location, a 50% burn location, and a second peak location.
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Copy of UK Search Report by John Twin, Examiner , Jun. 11, 2004, 6 pages.
Daniels Chao F.
Zhu Guoming G.
Dickinson Wright PLLC
Hoang Johnny H.
Visteon Global Technologies Inc.
Wolfe Willis R.
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