Loading patent…
AssigneeFord Motor Company
InventorsDouglas R. Hamburg, Jeffrey A. Cook, Richard E. Soltis, Eleftherios M. Logothetis, Jacobus H. Visser
Estimating the term…
An engine air/fuel control system (8) and method for controlling an engine (28) coupled to a catalytic converter (50) and for providing a measurement of engine emissions (202-296). Nitrogen oxides concentration, hydrocarbon concentration, and carbon monoxide concentration of exhaust gases downstream of the converter are measured (46, 54, and 52). Each concentration measurement is averaged for the speed load cell in which such measurement occurred (244-256). Each concentration average measurement is converted to a measurement of mass emissions emitted during a test cycle (268-284). Fuel delivered to the engine is corrected by a feedback variable (104-134, 158-178) derived from both an exhaust gas oxygen sensor (44) positioned upstream of the converter and the three sensors positioned downstream of the converter (46, 52, 54). A measurement of emissions in response to the averaged mass measurements of emission concentration downstream of the converter is also provided (278-296).
An air/fuel control system for an engine having an exhaust coupled to a catalytic converter, comprising:
An engine air/fuel control method for controlling an engine coupled to a catalytic converter and for providing a measurement of engine emissions, comprising the steps of:
An engine air/fuel control method for controlling an engine coupled to a catalytic converter and for providing a measurement of engine emissions, comprising the steps of:
Dependencies are inferred from the claim text.