The automobile exhaust system is mainly used to discharge the exhaust gas from the engine operation, while reducing the exhaust gas pollution and noise. The automobile exhaust system is mainly used for light vehicles, minicars, buses, motorcycles and other motor vehicles.
Automobile exhaust system refers to the system that collects and emits exhaust gas, which is generally composed of exhaust manifold, exhaust pipe, catalytic converter, exhaust temperature sensor, automobile muffler and exhaust tailpipe.
To start its journey the exhaust gas first passes through the exhaust manifold or if you have a performance exhaust, an exhaust header or extractor system. Performance exhaust systems are less restrictive and create a better exhaust flow to remove exhaust gas more quickly. This creates better engine performance resulting in an increase of engine power.
Exhaust Gas Recirculation (EGR)
Another unit you find on a diesel exhaust system is the Exhaust Gas Recirculation system or commonly called EGR. It is designed to decrease harmful Nitrogen Oxide (NOx) emissons and reduce the likely hood of detonation due to high combustion temperatures. The higher the combustion temperature the more NOx is produced. It cools some exhaust gas (using water) and bleeds the gas back into the intake manifold. This reduces the intake mix and cools the combustion temperature.
Diesel Particulate Filter (DPF)
A unit you find on diesel exhaust system is a Diesel Particulate Filter or commonly called DPF. This exhaust component is similar to a catalytic converter as it is needed to reduce exhaust emissions. It filters out particulate matter soot from the exhaust.