Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2006-09-05
2009-12-29
McMahon, M. (Department: 3741)
Internal-combustion engines
Spark ignition timing control
Electronic control
Reexamination Certificate
active
07637246
ABSTRACT:
Presented is a device that provides a correction factor to compensate for varying fuel and air properties in an ion signal sensed in combustion chamber of reciprocating and continuous combustion engines, on a predetermined basis during the combustion of conventional petroleum-based fuels, other alternate fuels, and renewable fuels. The device uses an ion current reference sensor device and a processing module to provide a correction factor to the ion signal(s). The ion current reference sensor device is positioned near the chamber(s) of the engine and fuel provided to the chamber(s) is routed to provide a diffusion flame and the resultant ion current from the flame is measured and provided to the processing module at discrete intervals during the combustion process. Alternatively, a pre-mixed flame is used. The processing module provides a scaling factor to be applied to the ion signal and/or calibration points used to detect combustion conditions.
REFERENCES:
patent: 6742499 (2004-06-01), Viele et al.
patent: 6786200 (2004-09-01), Viele et al.
patent: 6832472 (2004-12-01), Huang et al.
patent: 2004/0084025 (2004-05-01), Zhu et al.
McMahon M.
Reinhart Boerner Van Deuren P.C.
Woodward Governor Company
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