This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Air Fuel Ratio Control for V2 Engine with On-Line System Identification of Fuel Film Dynamics
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 11, 2014 by SAE International in United States
Annotation ability available
Fuel film dynamics in the intake manifold are considered to develop air fuel ratio (AFR) control strategy with on-line system identification for a V2 engine in this paper. A1000 cc four-stroke two-cylinder, water-cooled port injection SI engine is used as the target engine to develop the engine model in Matlab/Simulink. The model which consists of charging, fueling, combustion, friction, and engine rotational dynamics is used to verify the proposed AFR control. Since the fuel film dynamics changes with different engine operating conditions, the fuel film parameters are often listed as look-up tables for fuel film dynamics calculation in the conventional AFR control. However, those parameters might be inaccurate during transient engine operation. Different intake port temperature will affect the accuracy of those fuel film parameters as well. In order to solve this problem, recursive least square (RLS) is used to identify those parameters on-line. Kalman filter is utilized to estimate the AFR using a narrow-band oxygen sensor. Model predictive control is used to design the proposed AFR controller using the identified parameters of fuel film dynamics and estimated AFR. Simulation results show that those parameters identified using RLS are more accurate to describe the transient fuel film dynamics than that from look-up tables. In addition, using the proposed AFR control strategy, AFR can be controlled at the desired value both in steady state and transient engine operation.
- Bo-Chiuan Chen - National Taipei University of Technology
- Yuh-Yih Wu - National Taipei University of Technology
- Wen-Han Tsai - National Taipei University of Technology
- Hsien-Chi Tsai - National Taipei University of Technology
- Huang-Min Lin - National Taipei University of Technology
- Yao-Chung Liang - National Taipei University of Technology
CitationChen, B., Wu, Y., Tsai, W., Tsai, H. et al., "Air Fuel Ratio Control for V2 Engine with On-Line System Identification of Fuel Film Dynamics," SAE Technical Paper 2014-32-0078, 2014, https://doi.org/10.4271/2014-32-0078.
- Buckland J. H., and Cook J. A., “Automotive Emissions Control,” 2005 American Control Conference, June 8-10, 2005.
- Pulkrabek W. W., “Engineering Fundamentals of the Internal Combustion Engine 2nd,” Pearson Prentice-Hall, 2004, pp. 352.
- Bosch, “Oxygen Sensors,” Bosch Service Tech Magazine,” May 2001.
- Lee Cheng-Yu, “Air Fuel Ratio Control for Scooter Engine Using Model Predictive Control,” Master Thesis, National Taipei University of Technology, Taiwan, 2010.
- Tung-Chieh Chen, “Air Fuel Ratio Control for V2 Engine Using On-line System Identification of Fuel Film Dynamic,” Master Thesis, National Pingtung University of Science and Technology, Taiwan, 2005.
- Moskwa J. J. and Hedrick J. K., “Modeling and Validation of Automotive Engines for Control Algorithm Development,” Transactions of the ASME, Journal of Dynamic Systems, Measurement, and Control, 1992, Vol. 114, pp. 278-285.
- Wu Y.-Y., Shiao Y., and Chen B.-C., “Motorcycle Engine Modeling for Real Time Control,” 6th International Symposium on Advanced Vehicle Control, 2002, Hiroshima, Japan.
- Moskwa J. J., “Estimation of Dynamic Fuel Parameters in Automotive Engine,” Journal of Dynamic Systems, Measurement, and Control, ASME Transactions, Vol.116, December 1994, pp. 774-780.
- Yang W. C., Glidewell J. M., Tobler W. E., Chui G. K. “Dynamic Modeling and Analysis of Automotive Multi-port Electronic Fuel Delivery System,” Journal of Dynamic Systems, Measurement, and Control, ASME Transactions, Vol.113, March 1991, pp. 143-151.
- Aquino, C., “Transient A/F Control Characteristics of the 5 Liter Central Fuel Injection Engine,” SAE Technical Paper 810494, 1981, doi:10.4271/810494.
- Hires, S. and Overington, M., “Transient Mixture Strength Excursions - An Investigation of Their Causes and the Development of a Constant Mixture Strength Fueling Strategy,” SAE Technical Paper 810495, 1981, doi:10.4271/810495.
- Yeh Hsin-Cheng, “Fuel Spray Observation and Development of Fuel Film Dynamic Model for Motorcycle EFI System,” Master Thesis, Taiwan, 2007.
- Wu Y.-Y., Chen B.-C., and Hsieh F.-C., “Modulization of Four-Stroke Single-Cylinder Spark-Ignition Air-Cooled Engine Models,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2007, Vol. 221, No. 8, pp. 1015-1026.
- Kouremenos, D., Rakopoulos, C., Hountalas, D., and Zannis, T., “Development of a Detailed Friction Model to Predict Mechanical Losses at Elevated Maximum Combustion Pressures,” SAE Technical Paper 2001-01-0333, 2001, doi:10.4271/2001-01-0333.
- Souder J. S. and Hedrick J. K., “Adaptive sliding mode control of air-fuel ratio in internal combustion engines,” Int. J. Robust onlinear Control, vol. 14, pp. 525-541, 2004.
- Zavala J. Carlos, Dietmar, Pannag Sanketi, Wilcutts Mark and Hedrick Karl, “Fuel Dynamics Model For Engine Coldstart”, Proceedings of IMECE 2006, ASME paper IMECE2006-15203, Nov. 2006
- Chang, C., Fekete, N., and Powell, J., “Engine Air-Fuel Ratio Control Using an Event-Based Observer,” SAE Technical Paper 930766, 1993, doi:10.4271/930766.
- Chin, Y. and Coats, F., “Engine Dynamics: Time-Based Versus Crank-Angle Based,” SAE Technical Paper 860412, 1986, doi:10.4271/860412.
- Astrom K. J., and Wittenmark B., “Adaptive Control,” Addison-Wesley, Massachusetts, 1989.
- Chui C. K., Chen G., Kalman Filtering with Real-Time Application 4th, Springer, 2009.