SYSTEM AND METHODS FOR ADJUSTING AN EXHAUST GAS RECIRCULATION VALVE BASED ON MULTIPLE SENSOR OUTPUTS

摘要

Methods and systems are provided for adjusting an exhaust gas recirculation (EGR) valve based on a final EGR estimate. In one example, a method may include adjusting the EGR valve based on a final EGR flow estimate, the final EGR flow estimate based on a first EGR flow estimated with a differential pressure sensor across the EGR valve, a second EGR flow estimated with an intake oxygen sensor, and accuracy values of each of the first and second EGR flows. The accuracy value may be based on engine operating conditions during estimation of the first and second EGR flows.

主权项

1. A method for an engine, comprising:
adjusting engine operation based on a final gas flow parameter estimate, the final gas flow parameter estimate based on each of a first gas flow parameter estimated with a first sensor, a second gas flow parameter estimated with a second sensor positioned away from the first sensor in a gas passage of the engine, and accuracy values of each of the first and second gas flow parameters.