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Air-Fuel Ratio Regulation with Optimum Throttle Opening in Diesel-Dual-Fuel Engine
Technical Paper
2010-01-1574
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Accurate air-fuel ratio control is required for good engine performance and low emission in diesel dual fuel engine. Two actuators directly affect the ratio are the air throttle and the EGR valve. Maximum air throttle opening is favorable to minimize pumping loss, and the EGR valve opening should follow closely the values in a well-tuned map to minimize emission. In the past, the two actuators were either controlled separately or simultaneously to achieve the air-fuel ratio set point without much consideration on the actuators' opening positions. We proposed a logic that alternated between actuating the air throttle and the EGR valve to maintain optimum air throttle opening. Since each actuator was controlled one at a time, the overall control system was simplified, yet any advanced controller could be applied to increase the accuracy of each actuator. Experiments on four-cylindrical diesel-dual-fuel engines showed that the air throttle opening was optimized at all time, whereas the EGR valve opening followed closely the values in a well-tuned map. The air-fuel ratio was also accurately regulated with widest range possible. Both new-European-driving-cycle and set point changes tests were performed on engine and chassis dynamometers, which demonstrated the effectiveness of the proposed method.
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Citation
Chatlatanagulchai, W., Yaovaja, K., Rhienprayoon, S., and Wannatong, K., "Air-Fuel Ratio Regulation with Optimum Throttle Opening in Diesel-Dual-Fuel Engine," SAE Technical Paper 2010-01-1574, 2010, https://doi.org/10.4271/2010-01-1574.Also In
References
- Plianos, A. Achir, A. Stobart, R. Langlois, N. Chafouk, H. “Dynamic Feedback Linearization Based Control Synthesis of the Turbocharged Diesel Engine,” American Control Conference 2007 USA July 11-13 2007
- Shamekhi, A. H. Ziabasharhagh, M. Aghanajafi, C. “Air-to-Fuel Ratio Control of a Turbocharged Diesel Engine Equipped with EGR Using Fuzzy Logic Controller,” SAE Technical Paper 2007-01-0976 2007
- Egardt, B. “Backstepping Control with Integral Action Applied to Air-to-Fuel Ratio Control for a Turbocharged Diesel Engine,” SAE Technical Paper 2002-01-0195 2002
- Noble, A. D. Beaumont, A. J. “Control System for a Low Emissions Natural Gas Engine for Urban Vehicles,” SAE Technical Paper 910255 1991
- Lu, B. Minggao, Y. “Coordinated Control of EGR and VNT in Turbocharged Diesel Engine Based on Intake Air Mass Observer,” SAE Technical Paper 2002-01-1292 2002
- Chauvin, J. Petit, N. Rouchon, P. Moulin, P. Corde, G. “Six Degrees Crankshaft Individual Air Fuel Ratio Estimation for Diesel Engines,” SAE Technical Paper 2006-01-0013 2006
- Azzoni, P. Minelli, G. Moro, D. Ceccarani, M. Rizzoni, G. “Air-Fuel Ratio Control for a High-Performance Engine Using Throttle Angle Information,” SAE Technical Paper 1999-01-1169 1999
- Sarlashkar, J. Sasaki, S. Neely, G. D. Wang, J. Sono, H. “An Airflow-Dominant Control System for Future Diesel Engines,” SAE Int Journal of Fuels and Lubricants 116 753 765 2007
- Wahlstrom, J. Eriksson, L. Nielsen, L. “EGR-VGT Control and Tuning for Pumping Work Minimization and Emission Control,” IEEE Transactions on Control Systems Technology 18 1 2010