combustion-chamber-development-for-low-emissionCombustion chamber developments in the direction oflow emissions must also keep the damage risk atan acceptably low level.Formation rate of NOxFlame temperature[°C]230018001300 800 weak rich stoichometrictoo richtoo weakAir throughflowAir/fuel ratioStable zoneRich limitWeak limitIgnition loopHC,sootincreasingCOincreasing