Method for controlling internal combustion engine emissions

Details Method for controlling internal combustion engine emissions Method for controlling internal combustion engine emissions

2007-07-10

2007-07-10

Kwon, John T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S672000, C060S285000

Reexamination Certificate

active

11449164

ABSTRACT:
A method for controlling internal combustion engine emissions, including the steps of reading signals from sensors in an engine exhaust manifold and catalytic converter exhaust, an upstream one of the sensors being provided with an air-fuel mixture setpoint, comparing signal values with previous average values and automatically adjusting the air-fuel mixture set point to vary the fuel mixture fed to the engine.

REFERENCES:
patent: 6102019 (2000-08-01), Brooks
patent: 6161531 (2000-12-01), Hamburg et al.
patent: 6308697 (2001-10-01), Surnilla et al.
patent: 6738707 (2004-05-01), Kotwicki et al.
patent: 7059112 (2006-06-01), Bidner et al.
patent: 7194854 (2007-03-01), Surnilla et al.
patent: 2003/0093212 (2003-05-01), Kotwicki et al.

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