In what way does the mpg or kmpl number of a car depend on its speed? Is the advertised number based on average speed or a specific speed (say, 60 km/h)?
In: Engineering
From my knowledge it is based off speed, there’s an old chart where at lower speeds you burn more fuel the faster you accelerate then it reaches a point where you stay at a constant speed and and fuel consumption kinda levels off to be an efficient value. In the states its normally based of 60 mph and 35 to set for highway and city driving. City driving is stop and go so, its alot of mashing the gas to speed up then hit the brake to slow down, where as highway you hit the gas get to speed and stay there til you have to stop or something causes you to slow down but it not as stop and go as in a city. Example turn on a faucet just a little, the water comes out at a slow rate, example of reaching a good fuel burn to movement ratio at a constant speed, if you turn the faucet wide open (hard acceleration) more water comes out similar to how you would burn more fuel. Sure someone can give a better example with demos and pictures
Latest Answers