How nitrogen oxides are produced n a petrol engine?

Nitrogen oxides (NOx) are produced in petrol engines primarily during the combustion process, particularly at high temperatures when nitrogen and oxygen from the air react. This occurs in the combustion chamber when the engine is operating under high load and temperature conditions, such as during acceleration. Additionally, incomplete combustion and the use of certain fuel formulations can also contribute to NOx emissions. These pollutants can lead to smog formation and have adverse health effects.