mix the fuel and air
ignite the air fuel mixture
provide flame front for ignition
spray atomized fuel in the cylinder
tetraethyl lead
trimethyl pentane
amyl nitrate
hexadecane
straight chain paraffins
aromatics
branched chain paraffins
napthalenes
brake power
compression ratio
specific air consumption
mean effective pressure
engine can run
engine gives maximum output
engine is most efficient
fuel can be used in a test engine without knocking