Consumption map
![Consumption map of a three cyllinder diesel engine, capacity1.5 l](/Images/godic/202501/06/Brake_specific_fuel_consumption.svg0815.png")
The consumption map or efficiency map shows the brake specific fuel consumption in g per kWh over mean effective pressure per rotational speed of an internal combustion engine.
On the abscissa it shows the rotational speed range. The ordinate is limited by the maximum load of the engine. The lines show the specific fuel consumtion and appear similar to a shell.