A Lambda Control Observer With Fault Correction

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 1998Researchpeer-review

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At the present, a long term stoichiometric Air/Fuel Ratio (AFR) control of the an SI engine is maintained by using a switching HEGO sensor and gain scheduled, high gain, PI controller. Because of its inexpensive and primitive design and the engine time delay, this loop has a very low effective bandwidth. It seldom exceeds 2 Hz. This is altogether too small for accurate transient air/fuel ratio control. This paper presents a new lambda (normalized air/fuel ratio) control methodology based on a time delay observer. This technique makes possible a significant increase of the lambda control bandwidth while at the same time incoporating an integration term so that stationary AFR errors are reduced to zero.
Original languageEnglish
Title of host publicationProc. IFAC Workshop: Advances in Automotive Control
Place of PublicationLoudonville OH USA
PublisherInternational Federation of Automatic Control
Publication date1998
Publication statusPublished - 1998
EventIFAC Workshop: Advances in Automotive Control - Loudonville OH USA
Duration: 1 Jan 1998 → …


ConferenceIFAC Workshop: Advances in Automotive Control
CityLoudonville OH USA
Period01/01/1998 → …
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ID: 5403334