This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Air Mass Flow Rate Observer Applied to SI AFR Control
Annotation ability available
Sector:
Language:
English
Abstract
This paper presents a new approach of Air Fuel Control (AFR) control strategy based on non-linear dynamics models of the engine air and fuel processes. Higher demands for lower engine exhaust emissions require a more accurate control of the air-fuel ratio during transient operations. A model-based air-fuel ratio control was applied to a production multipoint port injection engine with the initial constraint to keep the original sensors and actuators. The control strategy contains real-time engine models which describe air, fuel and sensors dynamics. In the final step, the control structure was implemented on a production car and evaluated on a chassis dynamometer. Several experiments with different transient conditions have shown reduced air-fuel ratio excursions in magnitude and duration compared to the standard strategy. Moreover, the calibration process was considerably easier than usual and required less testing on the car.
Recommended Content
Technical Paper | The Evaluation of a Computer Controlled Air Pump for Improved Automobile Emissions |
Technical Paper | A Microprocessor Based Vehicular Engine Control System Testbed |
Citation
Corde, G., Bianco, Y., and Lecluse, Y., "Air Mass Flow Rate Observer Applied to SI AFR Control," SAE Technical Paper 952460, 1995, https://doi.org/10.4271/952460.Also In
References
- Karnopp D.C. Margolis D.L. Rosenberg R.C. Systems dynamics: a unified approach John Wiley and son 1990
- Vénuti N. Thése de doctorat: applications de la conception mécatronique 1994
- Beaumont A.J. Noble A.D. Scarisbrick A. adaptive transient air-fuel ratio control to minimize gasoline engine emissions Fisita Congress Londres 1992
- Dauron A. thése de doctorat: modélisation et commande d'un moteur à combustion interne 1991
- Aquino C.F. transients A/F control characteristics of the 5 liter central fuel injection system SAE 810494 1981
- Hires S.D. Overington M.T. transient mixture strength excursions SAE 810495 1981
- Hendricks E. Vesterholm T. Kaidantzis P. Rasmussen P. Jensen M. Nonlinear transient fuel film compensation SAE 930767
- Almkvist G. Eriksson S. A study of air fuel transient response and compensation with different fuels SAE 941931
- Chang C.F. Fekete N.P. Powell D. Engine air-fuel ratio control using an event based observer SAE 930766 1993
- Martin L. Régulation de richesse par observateur d'état, rapport de DEA 1993
- Mouyon P. 1993
- Monaco S. Normand-Cyrot D. quelques éléments sur la commande numérique non linéaire, Systèmes non linéaires vol 3 Masson 1993
- Ault B.A.. Jones V.K. Powell J.D. Franklin G.F Adaptive air fuel ratio control of a spark-ignition engine SAE 940373 1994
- Harris-Brown Neurofuzzy adaptative modelling and control Prentice Hall 1994