Heard At The Show: Snippets from SAE 2009 World Congress
Green Car Congress
APRIL 30, 2009
In a session on total vehicle energy consumption, several people shared similar pie charts showing the flow of energy within an automobile. The operations in Kuwait and Iraq use approximately 431 million gallons of fuel per year. Where does all of the energy go? For every kJ of chemical energy in the fuel for a spark ignition internal combustion engine, 73 % is sacrificed to chemical and thermal losses. Braking losses add another 6%. Only 22% remains to power the vehicle.