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Vehicle Fuel Consumption

Vehicle Fuel Consumption

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


    • 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.


  • Advanced
  • 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.
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.
Course Content


0.25 day

  • 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

0.75 day

  • 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

2 days

  • 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

0.5 day

  • 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

1.5 days

  • 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.
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