Browse Publications Technical Papers 1999-01-0854
1999-03-01

Towards Robust H-infinity Control of an SI Engine's Air/Fuel Ratio 1999-01-0854

Long term stoichiometric Air/Fuel Ratio (AFR) control of an SI engine is at the present mainly maintained by table mapping of the engine's fresh air intake as a function of the engine operating point. In order to reduce a stationary error in the AFR to zero the table based control normally works in conjunction with a PI feedback from a HEGO sensor. The effective bandwidth of this feedback loop is quite small and seldom exceeds 2 Hz. This is altogether too small for accurate transient AFR control.
This paper presents a new λ (normalized Air/Fuel Ratio) control methodology (H∞ control) which has a somewhat larger bandwidth and can guarantee robustness with respect to selected engine variable and parameter variations.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Application of the Neural Network Mapping Air-Fuel Ratio with Combustion Products Components

2008-01-1720

View Details

TECHNICAL PAPER

Objective Determination of Minimum Engine Mapping Requirements for Optimal SI DIVCP Engine Calibration

2009-01-0246

View Details

TECHNICAL PAPER

Low-Order Map Approximations of Lean Cyclic Dispersion in Premixed Spark Ignition Engines

2001-01-3559

View Details

X