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Technical Evolutions of Automotive Engines

Technical Evolutions of Automotive Engines

3 days
This course is not scheduled.
Who should attend?


    • Engineers and technical staff already aware of engine fundamentals and looking for an update of engines’ technical evolutions.


  • Foundation
  • 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.
Learning Objectives
  • 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.
Course Content

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.
  • Downsizing
  • 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.


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”.
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Ways & Means
  • A complete overview presented by experienced engineers or industry project leaders.
  • Focus on engine design drivers. Ranking of design constraints.