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Politecnico di Torino
Academic Year 2014/15
01OFJLO
Engine emissions control/Electric and hybrid propulsion systems
Master of science-level of the Bologna process in Automotive Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
Millo Federico ORARIO RICEVIMENTO O2 ING-IND/08 41 7 2 0 10
Ravello Vittorio ORARIO RICEVIMENTO     30 15 5 0 9
SSD CFU Activities Area context
ING-IND/08
ING-IND/32
5
5
B - Caratterizzanti
F - Altre (art. 10, comma 1, lettera f)
Ingegneria meccanica
Altre conoscenze utili per l'inserimento nel mondo del lavoro
Subject fundamentals
The purpose of the module is to provide to the students fundamental knowledge about state of the art and future powertrain technologies aiming to the mitigation of the environmental impact of road vehicles, both through the control of pollutant emissions of conventional powertrains equipped with internal combustion engines and through innovative electric and hybrid propulsion systems.
Expected learning outcomes
A comprehensive knowledge of the main technologies for engine emissions control and hybrids and electric powertrains with related main e-components.

Capability of evaluating which technology packages are required to meet different legislation requirements.

Capability of analyzing the power demand of vehicles for different mission profiles, to identify the corresponding requirements for both conventional and hybrid electric powertrains and to estimate the corresponding CO2 and pollutant emissions.
Prerequisites / Assumed knowledge
A good knowledge of internal combustion engines, electrotechnics and low frequency electromagnetism fundamentals.
Contents
ENGINE EMISSIONS CONTROL
Introduction
Pollutant emissions environmental impact: primary and secondary pollutants, geographical impact scales, impact of the transportation sector, health effects.
The legislation framework
Pollutant formation and in cylinder control
Pollutant formation in s.i. engines: CO, HC, NOx formation mechanisms, impact of the main design and operating parameters
Pollutant formation in c.i. engines: CO, HC, NOx, PM formation mechanisms, impact of the main design and operating parameters
In cylinder emission control: EGR, "advanced" combustion regimes (e.g. PCCI)
Aftertreatment technologies
Three Ways Catalyst, TWC
Diesel Oxidation Catalyst, DOC
Diesel Particulate Filter, DPF
Selective Catalytic Reduction, SCR
Lean NOX Trap, LNT
Pollutant emissions measurements
Gaseous emissions concentrations measurements: NDIR (for CO, CO2), FID (for HC), CLD (for NOx),
Smoke and opacity measurements
Particle number and size measurements
ICE advanced technologies for emissions control
Variable Valve Actuation, Miller Cycle, cylinder deactivation
Gasoline Direct Injection: homogeneous and stratified charge operation
Common Rail injection systems: multiple injections, injection rate shaping
Advanced Combustion regimes (Homogeneous Charge Compression Ignition, HCCI).
Alternative fuels
CNG, H2/CNG mixtures, LPG
Bioethanol
Biodiesel, HVO, GTL

ELECTRIC AND HYBRID PROPULSION SYSTEMS
Introduction to alternative propulsion systems, components and applications
Main typologies and possible classifications of the alternative propulsion systems: definitions, functioning modes and comparison in term of performance and efficiency
Classification, functioning principles and analysis of the main non-conventional components:
Energy storage systems and power buffers: batteries, supercapacitors and flywheels
Electric traction and generation machines: DC and AC machines
Power Electronics and control: DC/DC and DC/AC converters
Fuel-Cell Stack and Fuel-Cell System
Electric Hybrid Propulsion Systems
Electric Hybrid vehicle architectures. Typologies and functioning principles for:
Parallel hybrid (Electrically assisted Internal Combustion Engine propulsion system)
Series hybrid (Thermally assisted electric propulsion system)
Series-parallel hybrid (combined, split...)
Analysis of the propulsion system on vehicle
Components selection for: internal combustion engine, energy storage system and power buffer (if any), electric machines and power electronics, mechanical transmission
Models for performance, efficiency and on the vehicle control simulation. Experimental results and realised vehicles examples
Electric Propulsion Systems
Electric vehicle architectures. Typologies and functioning principles with: batteries and/or Fuel Cell
Analysis of the propulsion system on vehicle
Components selection for: energy storage system and power buffer (if any), electric machines and power electronics, mechanical transmission
Models for performance, efficiency and on the vehicle control simulation. Experimental results and realised vehicles examples
Perspectives and future developments
Application requirements for niche and future mass production markets
Evolution trends
Strategies for the effective introduction of the electrified propulsion systems on vehicle
Delivery modes
LABs & EXERCISES
ENGINE EMISSIONS CONTROL
Fuel consumption and emissions calculation for a passenger car over the NEDC
"Raw" and "diluted" specific emissions calculations for steady state operating conditions
Emissions measurements at Polito DENERG labs

ELECTRIC AND HYBRID PROPULSION SYSTEMS
Pre-design, performance and efficiency analysis of alternative propulsion systems for different architectures

Visit of the CRF laboratories at Orbassano and in particular of some testing and development devices in the facilities for the alternative propulsion systems
Texts, readings, handouts and other learning resources
Since most of the topics of the course concern the recent and upcoming development of the technologies for emission controls and alternative propulsion systems, there are no textbooks encompassing all the course topics.
Lesson slides will be distributed through the Polito Website or through paper copies available at the Campus printing office.
Assessment and grading criteria
The final exam is made of two parts, the first concerning emissions control, the second the electric and hybrid propulsion systems. The first part is based on a written examination made of 4-5 questions, while the second part assessment is based on a written and an oral examination.

Programma definitivo per l'A.A.2014/15
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