Conference paper
A Lambda Control Observer With Fault Correction
In
Proc. Ifac Workshop: Advances in Automotive Control
—
1998
Abstract
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.
| Language: | English |
|---|---|
| Publisher: | International Federation of Automatic Control |
| Year: | 1998 |
| Proceedings: | 2nd IFAC Workshop on Advances in Automative Control 1998 |
| Types: | Conference paper |
