Malfi, Enrica (2021) Numerical Analyses on Ultra-Lean Si Engine Integrated In a Hybrid Powertrain to Reduce Noxious Emissions. [Tesi di dottorato]


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Item Type: Tesi di dottorato
Resource language: English
Title: Numerical Analyses on Ultra-Lean Si Engine Integrated In a Hybrid Powertrain to Reduce Noxious Emissions
Date: 15 February 2021
Number of Pages: 238
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Industriale
Dottorato: Ingegneria industriale
Ciclo di dottorato: 33
Coordinatore del Corso di dottorato:
De Bellis, VincenzoUNSPECIFIED
Date: 15 February 2021
Number of Pages: 238
Keywords: Internal Combustion Engine; Phenomenological model; 0D/1D model; ultra-lean engines; pre-chamber engine; large-bore engine; pollutant emission; unburned Hydrocarbon model; vehicle simulation; hybrid powertrain.
Settori scientifico-disciplinari del MIUR: Area 09 - Ingegneria industriale e dell'informazione > ING-IND/08 - Macchine a fluido
Date Deposited: 22 Feb 2021 10:08
Last Modified: 20 Apr 2023 08:46

Collection description

The topic of the research activity, presented in this Ph.D. thesis, is the numerical investigation, through a hierarchical simulation-level approach, of innovative SI engines, possibly suitable for hybrid powertrains and featured by a reduced CO2 impact. For this purpose, firstly a conventional naturally aspirated small Spark Ignition (SI) engine has been analyzed, assessing the model predictivity of engine performance, combustion, and pollutant emissions. In the second stage, several engine architectures working in ultra-lean conditions have been numerically investigated, with particular emphasis on unburned hydrocarbon emission estimation. Then, an innovative 4-cylinder SI engine, equipped with an active pre-chamber (PC) ignition system and operating with an ultra-lean mixture, has been studied. Finally, this last engine has been virtually embedded into a hybrid electric vehicle (HEV), belonging to the C segment, to estimate CO2 and pollutant emissions along the worldwide harmonized light vehicles test cycle (WLTC) and Real Driving Emission (RDE)-compliant cycles and to verify the EU regulation fulfillment.


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