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Gas Engines

3 jours MOT/MGAZ-E
Niveau
Fondamentaux
Public
  • Engineers and technical staff of gas engine design, development or tuning departments. For a better understanding applicants are advised to preliminary follow the Module 1.
Finalité
  • To acquire an overview of gas engines technologies and operations.
Objectifs
  • To explain the basic principles of gas engines.
  • To know the fundamentals about gas combustion systems design and construction.
  • To know the architectures "Dual fuel" and "Full Gas" .
  • To know technologies associated with gas engines.
  • To explain how the gas characteristics affect the engine behavior.
  • To be aware of the requirements of these engines (gas quality, reliability, wear, ...).
  • To understand the structure and the basics on the gas engine control operation.
  • To be able to select gas depollution strategy: raw emissions improvement or after-treatment.
Pré-requis
  • Module 1 "MOT/MOT1-E" training or a basic knowledge of spark ignition engines and diesel engines operations.
Les + pédagogiques
  • All trainers are industry experts, delivering real life examples.

Gas engines based on ignition engines (CNG and LPG) 0.5 jour
  • Combustion fundamentals of spark ignition engines.
  • Combustion of the gas in this type of engine.
  • Abnormal combustion and associated risks.
  • Mono-fuel or dual fuel. Applications for particular vehicles.
  • Liquid or gas injection. Architecture and associated systems with gas engines.
  • Interests consumption, prices, pollution, impact on performance.
  • Perspective: use of dual fuel with turbocharged GDI engines.
Gas engines based on diesel engines 0.5 jour
  • Fundamentals of combustion of diesel engines.
  • Operation of gas engines and associated systems.
  • Pollution impact, consumption impact and performance impact.
  • Engine trucks or off-road
  • Case conversions: Diesel combustion to SI gas.
  • Recent cases of U.S heavy-duty engines: dual fuel Diesel/CNG based diesel.
  • Marine and stationary engines:
  • Operation of dual fuel engines : principle, architecture of the combustion chamber and injection systems.
  • Direct or indirect injection. Consumption and performance impacts.
Engine fuels characteristics 0.5 jour
  • Reminders of liquid fuels
  • Fuel for spark ignition engines: qualifications.
  • Fuel for diesel engines: qualifications.
  • Gaseous fuels main characteristics and specifications: natural gas vehicles (CNG) and liquefied natural gas (LPG), density, octane rating, volatility, chemical composition, sulfur, and impact on the engine behavior.
  • Impact of the fuel composition on raw emissions and after-treatement emissions.
Lubrication - Reliability and wear 0.5 jour
  • Gas impact on the oil operation and lubricating oil properties.
  • Gas impact on the engines operation.
  • Risks of wear and reliability. Impact on engine definitions.
Engine management system 0.5 jour
  • Reminders about engine management of spark ignition and compression engines.
  • Impact of gas operation on the engine management.
  • Technical definitions of gas engine management systems (regulators, tank, pressure sensors, valves, temperature sensors).
  • Gas impact on engine management strategies.
Spark ignition engine after-treatment 0.5 jour
  • Reminders about aftertreatment of spark ignition and compression engines.
  • Gas impact on the aftertreatment of such engines.