3 days MOT/ETMA-E
- Engineers and technical staff already aware of engine fundamentals and looking for an update of engines’ technical evolutions.
- This course provides a deeper knowledge on technical evolutions of the current automotive engines, both SI and Diesel ones and provides an overview of the current drivers of engine design: emissions and fuel consumption.
- Upon completion of the course, participants will be able to:
- recognize and understand direct injection SI engines operation,
- know the advantages of downsizing in gasoline spark ignition engines,
- recognize and understand the Diesel issues and evolutions,
- know new ignition modes (CAI and HCCI),
- know timing adaptations and new ignition modes,
- know supercharging technology evolutions.
- Our MOT/MOT1-E training may be useful.
Ways and means
- A complete overview presented by experienced engineers or industry project leaders.
- Focus on engine design drivers. Ranking of design constraints.
Gasoline combustion concepts & modes, direct injection & downsizing 1 day
- Gasoline direct injection (GDI)
- IDE advantages and drawbacks, strategies of use (R=1, stratified, …).
- Two main groups of combustion chambers.
- System characteristics: injectors, HP pump, regulator, rail, electronic power unit.
- Examples of achievements.
- Situation, stakes, consumption increase origin, difficulties to manage.
- Supercharging system specifications, different types of supercharging.
- Interest of coupling GDI with supercharging.
- Knocking management.
- Advantage of variable timing.
- CAI (Controlled Auto Ignition): principle, interest and limits.
Diesel combustion system 1 day
- Common rail Diesel direct injection
- Evolutions leading to direct injection and common rail injection system globalization.
- Parameters driving the Diesel engine maximum performances.
- Interactions between different technologies in Diesel engines and the performances making it possible to reach them.
- Exhaust gas after-treatment: Diesel exhaust gas after-treatment principles.
- HCCI (Homogeneous charge compression ignition): operating and conditions, interest, limits in high load and during transients.
Variable timing system 0.5 day
- Timing role and restrictions, interest of variable timing.
- Camshaft phase shifter, dual cam systems (Honda VTEC, Porsche Variocam, Mahle), continuous variation systems (Valvetronic BMW, Toyota Valvematic system, Nissan VVEL, Multiair Fiat). Camless system.
- Application to Miller/Atkinson systems.
Supercharging 0.5 day
- Turbocharger role, restrictions and dimensioning.
- Turbocharger technology evolution in relation to the engine evolutions: restrictions related to pressure increase and ignition temperatures (downsizing), interest of the dual inlet turbine (Twin Scroll).
- Response lag optimization: main bearings or roller bearings, compressor pre-launch by coupling, volumetric compressors.
- Evolutions: variable nozzle geometry (VNT), coupled turbochargers (serial or parallel), “e-Boosting”.