A. G. Stefanopoulou

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This paper presents a control approach for turbocharged spark ignition engines that coordinates the throttle and wastegate air path actuators in order to improve driveability without significant compromise in efficiency. The coordinated controller is based on a two-input single-output (TISO) architecture which can be tuned through classical frequency(More)
This paper presents the design of transient cylinder charge control, based on a cycle-averaged mean-value model for a turbocharged spark ignition direct injection engine equipped with dual-independent intake and exhaust variable camshafts which in this paper has been constrained to variable valve overlap with symmetric cam motions. The control-oriented(More)
This paper parameterizes the 0-dimensional model of liquid water front evolution associated with: (1) water transport through the membrane, and (2) accumulation and transport of liquid water in the Gas Diffusion Layer (GDL) originally presented in [1]. We add here vapor transport into and out of the channels and liquid water removal from the anode channel(More)
In this work, a physics-based method of estimating the residual mass in a recompression homogeneous charge compression ignition engine is developed and analyzed for real-time implementation. The estimation routine is achieved through in-cylinder pressure and exhaust temperature measurements coupled with energy and mass conservation laws applied during the(More)
In this paper a statistical physics based mean value model (MVM) is introduced for a heated intake homogeneous charge compression ignition (HCCI) engine based on a previously developed crank angle resolved model and validated. In this HCCI engine, regulation of combustion timing is based on manipulating the cylinder charge temperature through the cold and(More)
In this paper a surrogate electrochemical lithium-ion battery model, presented and discussed in (Di Domenico et al. CCA, 2008) and (Di Domenico et al. JDSMC, 2008), is parameterized and validated through experimental data by a 10 cell 37 V 6.8 Ah liion battery pack. Following past results (Zhang et al., 2000; Smith, 2010), the model is based on an(More)
An emission control problem for an automotive direct injected compression ignition (diesel) engine equipped with exhaust gas recirculation (EGR) and a variable geometry turbocharger (VGT) is considered. The objective i s t o o p-erate the engine to meet driver's torque demand and minimize NOx emissions while at the same time avoiding visible smoke(More)
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