Air Mass Flow Rate Observer Applied to SI AFR Control

952460

10/01/1995

Event
1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/952460
Pages
18
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.
Additional Details
Publisher
Published
Oct 1, 1995
Product Code
952460
Content Type
Technical Paper
Language
English