An Adaptive Air/Fuel Ratio Controller for SI Engine Throttle Transients 1999-01-0552
An adaptive air/fuel ratio controller for SI engine throttle transient was developed. The scheme is based on an event- based, single- parameter fuel dynamics model. A least- square- error algorithm with an active forgetting factor was used for parameter identifications. A one- step- look- ahead controller was designed to maintain the desired air/fuel ratio by canceling the fuel dynamics with the controller setting updated adaptively according to the identified parameters. When implemented on a Ford Ztech engine and tested under a set of throttle- transient operations, the adaptive controller learned quickly and performed well.
Electronic Engine Control Technologies-PT-73, Electronic Engine Controls 1999: Neural Networks, Diagnostic and Electronic Hardware, and Controls-SP-1419, SAE 1999 Transactions - Journal of Engines-V108-3