Consistent range calculation in hybrid vehicles with hybrid and pure battery electric propulsion

A method for determining fuel consumption of an electric hybrid vehicle, said vehicle including a main power source and a rechargeable electric energy source, said method comprising:

• determining an actual consumed fuel value that identifies how much actual fuel is being used by the main power source;
• determining a virtual consumed fuel flow value that is a function of an output current of the rechargeable electric energy source;
• determining a total consumed fuel value by adding the actual consumed fuel value and the virtual consumed fuel flow value;
• and
• determining a fuel consumption value indentifying the fuel consumed by the vehicle by dividing the total consumed fuel value by a distance the vehicle has travelled.

A method for determining a travel range of an electric hybrid vehicle, said vehicle including a main power source and a rechargeable electric energy source, said method comprising:

• determining an actual available fuel value of how much actual fuel is available on the vehicle;
• determining a virtual available fuel value as a function of the state-of-charge of the rechargeable electric energy source;
• determining a total available fuel value by adding the actual available fuel value and the virtual available fuel value;
• and
• determining the travel range of the vehicle by dividing the total available fuel value by a fuel consumption value.