Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1997-08-13
1998-12-15
Argenbright, Tony M.
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 123696, F01N 320, F02D 4114
Patent
active
058485287
ABSTRACT:
A method of automobile engine fuel control is disclosed which senses the condition of the automobile's catalytic converter for the purpose of varying the fuel control function to optimize the performance of the catalytic converter and lower the automobile's tail pipe emissions. In accordance with the method of the present invention, the oxygen storage capacity of the catalytic converter is determined from the oxygen content in the automobile's exhaust metering by sensors located before and after the catalytic converter. Where the oxygen storage capacity of the catalytic converter is high, such as in a new automobile, a higher proportional gain is used in metering the amount of fuel to be sprayed into to engine in response to a lean or rich fuel condition. Conversely, where the oxygen storage capacity is reduced, such as in the catalytic converter in a old car, a smaller proportional gain is used in metering the amount of fuel to be sprayed into the engine.
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Argenbright Tony M.
Siemens Automotive Corporation
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