QUENCH AREA

A zone in the combustion chamber where the piston at top dead center is very close to the cylinder head . Because the piston and cylinder head is cooler than the unburned part of the fuel-air mixture (i.e., end gas ), they pull the heat from the end gas. Because the end gas is now cooler, detonation is quenched or reduced. However, the process does form unburned hydrocarbons .