Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2006-08-14
2009-10-13
Vo, Hieu T (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
Reexamination Certificate
active
07603226
ABSTRACT:
Presented is a technique that utilizes ion current to determine the concentration of nitrogen oxides (NOx) produced in the combustion chamber(s) of diesel engines, on a cycle by cycle basis during the combustion of conventional petroleum-based fuels, other alternate fuels, and renewable fuels. The technique uses an ion current measuring circuitry, a calibration circuit and a signal processing circuit connected to the engine control unit (ECU). The ion current sensing circuitry is positioned in the chamber(s) of the engine, to measure the ion current produced during the combustion process. The calibration circuit utilizes NOxvalues measured in the exhaust port or manifold of the engine to calibrate the ion current signal. The calibrated ion current signal is fed into a processor that is connected to the ECU to adjust various operating parameters to improve the trade-off between NOxand other emissions, fuel economy, and power output.
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Reinhart Boerner Van Deuren P.C.
Vo Hieu T
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