This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Adaptive Engine Controls for Fuel Consumption and Emissions Reduction
Annotation ability available
Sector:
Language:
English
Abstract
The spark advance and fuelling of engines have generally been controlled by fixed open-loop schedules as functions of engine speed and load. Many engines have inferior fuel economy and emissions because of engine/controller mismatch and variations in parameters such as compression ratio. These errors manifest themselves as changes in the rate of burning. A controller is described that can detect these changes and compensate for them by adapting the schedules of spark advance or air:fuel ratio. A detection scheme utilizes engine speed signals to measure the slope of the torque versus spark advance curve without a torque sensor. Comparative fuel economy and emissions results are shown for a fleet of vehicles using an adaptive spark advance controller based on this method. Finally we show how a related fuelling controller can maintain a desired air:fuel ratio without an expensive sensor.
Recommended Content
Authors
- A. C. Wakeman - Lucas Engineering & Systems Limited, Lucas Research Centre
- J. M. Ironside - Lucas Engineering & Systems Limited, Lucas Research Centre
- M. Holmes - Lucas Engineering & Systems Limited, Lucas Research Centre
- S. I. Edwards - Lucas Engineering & Systems Limited, Lucas Research Centre
- D. Nutton - Lucas Engineering & Systems Limited, Lucas Research Centre
Citation
Wakeman, A., Ironside, J., Holmes, M., Edwards, S. et al., "Adaptive Engine Controls for Fuel Consumption and Emissions Reduction," SAE Technical Paper 870083, 1987, https://doi.org/10.4271/870083.Also In
Automotive Electronic Engine Management and Driveline Controls
Number: SP-0705; Published: 1987-02-01
Number: SP-0705; Published: 1987-02-01
SAE 1987 Transactions Alternative Engines and Engine Components and Systems
Number: V96-5; Published: 1988-09-01
Number: V96-5; Published: 1988-09-01
References
- Schweitzer P H Volz C “Electronic Optimizer Control for IC Engine; Most MPG for any MPH.” SAE 750370
- May M G “Fast Response Self Optimizing Spark Ignited Internal Combustion Engine” ISATA, Cologne Sept 1983 Automotive Automation London
- Main J J “New developments in powertrain control” Fifth International Conference on Automotive Electronics, Birmingham Oct 1986 IMechE, London
- Anderson R L “In-Cylinder Measurement of Combustion Characteristics Using Ionization Sensors” SAE 860485