energy (such as flywheels, springs, compressed air, or water in a reservoir). The first known use of fuel was the combustion of firewood by Homo erectus
addition to fuel, an engine needs oxygen in order to generate force: the stoichiometric ratio of petrol is 14.7:1 air to petrol, and 1.7:1 air to nitromethane
mixture of air and fuel into the combustion chamber during the intake stroke. This produces a homogeneous charge: a homogeneous mixture of air and fuel, which