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Engine Technical Evolution

Engine Technical Evolution

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


    • Engineers and technical staff wishing an update of the technical evolution: new combustion processes, regulation reinforcement, fuel economy improvement. People working at OEM as well as automotive suppliers.


  • Foundation
  • This course provides a deeper knowledge on the technical evolutions of passenger car combustion engines and the reasons for such evolutions. It may be very useful for
  • automotive suppliers needing an up-to-date overview of the engine world for passenger cars as well as for commercial vehicles. It delivers the keys of the specifications they obtain from theirs customers.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • know current and future evolutions of SI and Diesel engines,
  • understand the physics that have led to the adopted solutions,
  • apply technical solutions in the context of engine design,
  • competently exchange between manufacturers and suppliers.
Course Content


0.25 day

  • Efficiencies and conventional parameters of an engine, the most useful graphs.

Depollution & fuel consumption restrictions

0.25 day

  • Stakes and evolution of depollution standards.
  • Formation of HC, CO, NOx, particles pollutants. Comparison gasoline/Diesel.
  • Consumption: engine global efficiency breaking down into 4 efficiencies, factors affecting each of them. Comparison gasoline/Diesel, share of fuel, engine, engine-vehicle adaptation.

Gasoline technology evolution

0.5 day

  • Normal and abnormal combustion (knocking, pre-ignition, rumble).
  • Engine air loading: how the different parameters affect the evolution of the volumetric efficiency depending on the speed, use of intake and exhaust pressure waves to improve the load.
  • Variable timing - Interest and technical solutions: camshafts phase shifters, dual-cam systems, mechanical continuous variation, camless. Miller and Atkinson cycles.
  • Gasoline direct injection (GDI): technology, advantages and drawbacks, fuel/air ratio 1 or stratified strategies. Downsizing, interest of combining GDE + supercharging + variable distribution.

Diesel technology evolution

0.5 day

  • Direct injection Diesel engine combustion: formation of pollutants, fuel jets behavior in the combustion chamber, swirl role and generation.
  • Exhaust gas recirculation (EGR): interest of EGR and its cooling, EGR intercooler by-pass, high and low pressure EGR.
  • Interest of increasing injection and multi-injection pressures. Evolution of injection, fuel pump injector, common-rail systems.
  • Turbocharging, interest of variable geometry and twin-turbo.
  • New Diesel combustion processes: HCCI (Homogeneous Charge Compression Ignition).

Exhaust gas after-treatment

0.25 day

  • SI engines: 3-way catalysis; catalyst initiation issue.
  • Diesel engines: oxidation catalyst, Diesel particles filter performances and regeneration, 5th injector advantages and drawbacks. NOx trap. SCR (Selective Catalytic Reduction).

Engine management

0.25 day

  • General structure of a gasoline and Diesel control system. Engine torque management.
  • Components: actuators, sensors, logic controllers.
  • Electronic system: power supply, optical cables, buses, multiplexing.
  • Software: structure, input-output- processing, strategies, calibrations, evolutions. Reliability.
  • Diagnostic. Failure and limp home modes.
  • Development methods: contributors, key-steps, V cycle, tools.
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