The potential of internal EGR (iEGR) and external (eEGR) in reducing the engine-out NOx emissions a heavy-duty diesel engine has been investigated by means refined 1D fluid-dynamic model developed GT-Power environment. is equipped with Variable Valve Actuation (VVA) Geometry Turbocharger (VGT) systems. activity was carried out frame CORE Collaborative Project European Community, VII FP. integrates an innovative 0D predictive combustion algorithm for simulation HRR (heat release rate) based...

A new multizone premixed-diffusive combustion model has been developed, assessed, and applied to diagnose the burning process emission formation in a conventional premixed charge compression ignition (PCCI) diesel engine. The is based on Dec conceptual scheme, which considers as two-stage quasi-steady process: All fuel particles undergo first rich phase, products complete their oxidation close-to-stoichiometric conditions at jet periphery through diffusion flame. chamber contents have...

Numerical and experimental investigations have been carried out in order to study the effect of poppet geometry on flow-pressure characteristic a direct acting pressure relief valve, which is equipped with flow deflector for force compensation. A dynamic 3D-CFD model was built ANSYS Fluent™, capable simulating interaction between fluid dynamics by means mesh deformation user-defined function (UDF). This applied predict characteristics valve different spring preload settings geometries. The...

A real-time combustion model was assessed and applied to simulate BMEP (Brake Mean Effective Pressure) NOx (Nitrogen Oxide) emissions in an 11.0 L FPT Cursor 11 diesel engine for heavy-duty applications. The activity carried out the frame of IMPERIUM H2020 EU Project. developed used as a starting base derive model-based controller, which is able control indicated mean effective pressure by acting on injected fuel quantity main injection timing. tested at steady-state conditions transient...

An unsupervised machine-learning technique, aimed at the identification of optimal rule-based control strategy, has been developed for parallel hybrid electric vehicles that feature a torque-coupling (TC) device, speed-coupling (SC) device or dual-mode system, which is able to realize both actions. The approach based on preliminary carried out by means benchmark optimizer, deterministic dynamic programming different driving scenarios. optimization selecting values variables (i.e.,...

The paper has the aim of assessing and applying control-oriented models capable predicting HRR (Heat Release Rate) MFB50 in DI diesel engines. To accomplish this, an existing combustion model, previously developed by authors based on accumulated fuel mass approach, been modified to enhance its physical background, then calibrated validated a GM 1.6L Euro 6 engine. It verified that approach is accurately simulating medium-low load operating conditions characterized dominant premixed phase,...

The present study is focused on the development of a new control-oriented semi-empirical model to predict nitrogen oxide (NOx) emissions in light-duty diesel engine under both steady-state and transient conditions. based estimation deviations NOx emissions, with respect nominal engine-calibration map values, as function intake oxygen concentration combustion phasing. also takes into account effects speed, total injected quantity, ambient temperature humidity. approach has been developed...

<div class="section abstract"><div class="htmlview paragraph">The present work has the aim of developing a semi-empirical correlation to estimate NO₂/NO_x ratio as function significant engine operating variables in modern EURO VI diesel engine.</div><div experimental data used study were acquired at dynamic test bench ICEAL-PT (Internal Combustion Engine Advanced Laboratory Politecnico di Torino), frame research activity on optimization General Motors Euro prototype 1.6-liter...

A model-based approach to control BMEP (Brake Mean Effective Pressure) and NOx emissions has been developed assessed on a FPT F1C 3.0L Euro VI diesel engine for heavy-duty applications. The controller is based zero-dimensional real-time combustion model, which capable of simulating the HRR (heat release rate), in-cylinder pressure, engine-out levels. model realized by integrating improving previously simulation tools. new discretization scheme equations, in order reduce accuracy loss when...

An optimal design toolbox for hybrid electric vehicles has been developed and applied to three different vehicle segments (a compact vehicle, a small SUV medium-size SUV) two separate power-split layouts, both equipped with diesel engine. One layout features (3gTR) whereas the other lacks of additional 3-gear transmission. The combines optimization that control strategy is based on minimization total cost ownership (TCO) over lifetime. tool still retains capability complying performance...

A real-time mean-value engine model for the simulation of HRR (heat release rate), in-cylinder pressure, brake torque and pollutant emissions, including NOx soot, has been developed, calibrated assessed at both steady-state transient conditions a Euro 6 1.6L GM diesel engine.The chemical energy simulated using an improved version previously developed that is based on accumulated fuel mass approach.The pressure evaluated basis inversion single-zone model, net as input.The latter quantity was...