Final answer:
The primary function of the Exhaust Gas Recirculation (EGR) system is to reduce nitrogen oxide (NOx) emissions in internal combustion engines. The EGR system works by recirculating a portion of the exhaust gases back into the engine's intake manifold, where they mix with fresh air and fuel before combustion.
Step-by-step explanation:
The primary function of the Exhaust Gas Recirculation (EGR) system is to reduce nitrogen oxide (NOx) emissions in internal combustion engines. The EGR system works by recirculating a portion of the exhaust gases back into the engine's intake manifold, where they mix with fresh air and fuel before combustion. This dilutes the oxygen concentration in the combustion chamber, resulting in lower peak temperatures and reducing the formation of NOx.
For example, in a gasoline engine, the EGR system recirculates a portion of the exhaust gases to the intake manifold. This reduces the concentration of oxygen during combustion, which helps to prevent high temperatures and the subsequent formation of NOx.
The EGR system is an important component in reducing vehicle emissions and meeting environmental regulations.