An Adaptive Air/Fuel Ratio Controller for SI Engine Throttle Transients

Paper #:
  • 1999-01-0552

Published:
  • 1999-03-01
Citation:
Tseng, T. and Cheng, W., "An Adaptive Air/Fuel Ratio Controller for SI Engine Throttle Transients," SAE Technical Paper 1999-01-0552, 1999, https://doi.org/10.4271/1999-01-0552.
Pages:
13
Abstract:
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.
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