[13]	Kyung-ho Ahn, Anna G. Stefanopoulou, and Mrdjan Jankovic. Afr-based fuel ethanol content estimation in flex-fuel engines tolerant to maf sensor drifts. IEEE Transactions on Control Systems Technology, 21(3):590-603, May 2013. [ bib | DOI | pdf ]
[12]	E. Hellström, D. Lee, L. Jiang, A. G. Stefanopoulou, and H. Yilmaz. On-board calibration of spark timing by extremum seeking for flex-fuel engines. IEEE Transactions on Control Systems Technology, 21(6):2273-2279, 2013. [ bib | DOI | pdf ]
[11]	D. Lee, L. Jiang, H. Yilmaz, and A.G. Stefanopoulou. Air charge control for turbocharged spark ignition engines with internal exhaust gas recirculation. In 2010 American Control Conference, pages 1471-1476, June 2010. [ bib | DOI | pdf ]
[10]	K. Ahn, A.G. Stefanopoulou, L. Jiang, and H. Yilmaz. Ethanol content estimation in flex fuel direct injection engines using in-cylinder pressure measurements. Technical Report 2010-01-0166, SAE World Congress, 2010. [ bib | DOI | pdf ]
[9]	K. Ahn, A.G. Stefanopoulou, and M. Jankovic. Puddle dynamics and air-to-fuel ratio compensation for gasoline-ethanol blends in flex-fuel engines. IEEE Trans. Control Syst. Technol., 18(6):1241-1253, 2010. [ bib | DOI | pdf ]
[8]	K. Ahn, L. Jiang, and A.G. Yilmaz, H.and Stefanopoulou. Ethanol content estimation in flex-fuel direct injection engines with fault detection under fuel injector drifts. In IFAC Symposium on Advances in Automotive Control (AAC2010), 2010. [ bib | pdf ]
[7]	L. Jiang, H. Yilmaz, M. Christie, K. Ahn, and A. Stefanopoulou. Optimally controlled flexible fuel vehicle. In 10th Stuttgart International Symposium, 2010. [ bib | pdf ]
[6]	Kyung-ho Ahn, Anna G. Stefanopoulou, and Mrdjan Jankovic. Tolerant ethanol estimation in flex-fuel vehicles during maf sensor drifts. In Proceedings of the ASME 2009 Dynamic Systems and Control Conference, number DSCC2009-2708 in Paper MoAT4.3, pages 581-588, October 2009. [ bib | DOI | pdf ]
[5]	N. Oliverio, A. Stefanopoulou, L. Jiang, and H. Yilmaz. Ethanol detection in flex-fuel direct injection engines using in-cylinder pressure measurements. SAE International Journal of Fuels and Lubricants, SAE 2009-01-0657, 2(1):229-241, October 2009. [ bib | DOI | pdf ]
[4]	Kyung-ho Ahn, A.G. Stefanopoulou, and M. Jankovic. Fuel puddle model and afr compensator for gasoline-ethanol blends in flex-fuel engines. In IEEE Vehicle Power and Propulsion Conference VPPC '09., pages 1148-1155, September 2009. [ bib | DOI | pdf ]
[3]	L. Jiang, J. Vanier, H. Yilmaz, and A. Stefanopoulou. Parameterization and simulation for a turbocharged spark ignition direct injection engine with variable valve timing. Technical Report 2009-01-0680, SAE, 2009. [ bib | DOI | pdf ]
[2]	Nestor H. Oliverio, Li Jiang, Hakan Yilmaz, and Anna G. Stefanopoulou. Modeling of fuel ethanol concentration effect on cylinder pressure evolution in direct-injection flex-fuel engines. In Proceedings of the American Control Conference, pages 2037-2044, 2009. [ bib | DOI | pdf ]
[1]	Kyung-ho Ahn, Anna G. Stefanopoulou, and Mrdjan Jankovic. Estimation of ethanol content in flex-fuel vehicles using an exhaust gas oxygen sensor: Model, tuning and sensitivity. In Proceedings of ASME Dynamic Systems and Control Conference (DSCC08), number DSCC2008-2232, pages 947-954, 2008. [ bib | DOI | pdf ]