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Diesel Engines Performances - Level 1

MOT/PMD1-E
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Who should attend?

  • This course provides a deeper knowledge on heavy duty truck engines performances, design and development: basic sizes, combustion, injection systems, supercharging, fuels and lubricants.
Audience :
  • Engineers and technical staff working in relation with engine departments and needing to know the vocabulary, the physics fundamentals and the main technologies of Diesel engines.

Level : Advanced

Course Content

  • Efficiency & performances

      • Power, torque, mean effective pressure, piston mean velocity: situation of heavy truck engines compared with the other spark ignition or Diesel engines.
      • Volumetric efficiency, influence on performances.
      • Engine efficiencies: global efficiency, combustion efficiency, thermo-dynamic efficiency, cycle type efficiency, organic efficiency. How tuning affects the different efficiencies. Specific consumption. Thermal balance.

  • Diesel combustion & injection

      • Diesel combustion mechanism. Pollutants formation: PM, NOx, HC, CO. Representation on Pischinger diagram.
      • Different combustion phases: auto-inflammation delay, pre-mixture combustion, diffusion flame combustion. Combustion-related noise. Fuel cetane number.
      • Combustion system: swirl definition, measurement and generation; fuel-jet characteristics: introduction rate, penetration, atomization, external form; piston combustion chamber.
      • Technology of the different injection systems: injectors-pumps, unit pumps, common-rail, Caterpillar system.
      • Exhaust gas recirculation: how it acts on nitrogen oxides reduction, interest of EGR cooling, development technologies.
      • New Diesel combustion processes (HCCI).

  • Fuels - Lubricants

      • Fuel production in refineries. Diesel fuel main characteristics in relation with the use of engine: cetane, cold engine operability, distillation, lubrication capacity.
      • Lubricant main required properties.

  • Supercharging

      • Turbocharger operating principle.
      • Choosing a turbocharger to match a given engine.
      • Variable geometry turbocharger, twin scroll turbocharger.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • know the definition and the use of parameters used in the engine design and development,
  • master the physics that lead to pollutants formation (PM, NOx, HC, CO) and the physics of the technologies aimed at reducing the pollutants (injection, swirl, exhaust gas recirculation, advance),
  • understand the technologies of the injection systems used,
  • know turbochargers’ operating principles and the way to match them to an engine.

Ways & Means

  • The fundamentals of Diesel engines in a funny and easy way for a better and reliable understanding.