Automatic Control of Cylinder by Cylinder Air-Fuel Mixture Using a Proportional Exhaust Gas Sensor 940149
Cylinder to cylinder air-fuel imbalance in an engine due to geometrical factors and component tolerances may be overcome by a system capable of individually controlling the air-fuel ratio for each cylinder. A stable feedback controller for individual cylinder air-fuel ratio was designed using dynamic models of the gas transport process and the proportional exhaust gas sensor (UEGO). The controller was tested using a proportional exhaust gas sensor located in each bank of a V6 engine. Preliminary test results indicate that automatic balancing of the air-fuel ratio to each cylinder can reduce carbon monoxide emissions compared to a feedback system controlling overall air-fuel ratio.
Citation: Bush, K., Adams, N., Dua, S., and Markyvech, C., "Automatic Control of Cylinder by Cylinder Air-Fuel Mixture Using a Proportional Exhaust Gas Sensor," SAE Technical Paper 940149, 1994, https://doi.org/10.4271/940149. Download Citation
Kevin J. Bush, Neil J. Adams, Sanjay Dua, Craig R. Markyvech
International Congress & Exposition
Electronic Engine Controls 1994-SP-1029, SAE 1994 Transactions: Journal of Engines-V103-3