Vehicle Fuel ConsumptionMOT/PRESTAC-E

Who should attend?

  • This course provides a deeper knowledge and competencies on fuel consumption and CO2 emissions. It also deals with applications to engine management and fuel economy tuning.
Audience :
  • Engineers and technical staff involved in the design, development, calibration and testing of engines, needing to know how to optimize fuel consumption and CO2 emissions.

Level : Advanced

Course Content

  • Context

      • Regulations, incentive ans consumerist context
      • Fuel consumption and CO2 emissions (seen from manufacturers, consumers, governments).
      • CO2 emissions and Greenhouse effect.
      • Protocoles, intergovernmental agreements, new laws, tax incentives (Kyoto, CAFE, …).
      • Fundamentals of fuel consumption.
  • Energy optimization ways

      • Impact of the main bricks used to reduce fuel consumption
      • Energy balance of a vehicle. Bar graph example of the fuel economy impact of the “bricks”; incentives & taxes.
      • Reduction of fuel consumption of the powertrain (gear ratios adaptation, calibration trade-off, …).
      • Reduction of fuel consumption through vehicle (S Cx, light weight, management of electrical energy, …).
      • Numerical simulation exercise.
      • Vehicle electrification (types and levels):
      • Stop & start, micro-hybrid, mild hybrid, full hybrid, plug-in hybrid.
      • Full electric vehicles, range extender.
      • Which stakes? Which vehicles and when?
  • Powertrain efficiencies & fuel economy

      • Evolutions related to combustion and thermodynamics:
      • Fuels and combustion efficiency: calorific power and energy density, alternative fuels, fossil reserves and consequences on automotive technology evolution.
      • Thermodynamical efficiency (volumetric ratio, unit cylinder capacity, number of cylinders, …).
      • Cycle efficiency, high pressure loop, low pressure loop.
      • Engine downsizing.
      • Evolutions related to mechanical losses:
      • Mechanical efficiency (engine and gearbox) and optimization ways:
      • lubrification by oil, cooling system,
      • components: geometry (piston skirt, piston rings, …), weight reduction, friction losses, surface finish, tribology,
      • optimization of combustion engine for hybrid propulsion use.
      • Thermomanagement:
      • The objectives of thermomanagement: friction reduction, emissions management, fuel consumption management.
      • The “bricks” of thermomanagement, use and impact.
      • Numerical simulation exercise.
  • Engine management & calibration

      • Introduction to engine management.
      • Trade-off strategies: fuel economy/reliability, or fuel economy/consumption/driveability, or fuel economy/emissions/catalyst storage, fuel economy/max load performances.
      • Inter-performance trade-off and impact on fuel economy.
      • FE display on dashboard.
      • Data spread/survivability.
      • Homologation and conformity on production (COP).
  • Vehicle & powertrain electrification

      • Energy optimization:
      • Operating point of powertrain; management of vehicle performances trade-off.
      • Optimization rules, help to user’s drive.
      • Calibration and optimization:
      • Energy management law.
      • Optimization criteria, investigation to optimum.
      • Base optimization, off-line optimization, on-line optimization.
      • Impact on fuel consummation: homologation/urban use/mixed use.
      • Parametrical study based on numerical model and AMESIM simulation.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • identify and optimize the main engine parameters to improve fuel economy,
  • design, describe and tune engine management strategies impacting fuel economy,
  • manage the trade-off between vehicle performances (emissions, drivability, emissions, …) and their impact on fuel economy.