Low-Pressure Exhaust Recirculation Filter (ERF)


A low-pressure exhaust recirculation filter (ERF) is a type of filter used in diesel engine exhaust systems to reduce emissions. It is often used in conjunction with an exhaust gas recirculation (EGR) system. 

The ERF is typically located between the EGR cooler and the intake manifold. It filters the exhaust gases before they are re-circulated back into the engine. This helps to remove particles and other harmful substances from the exhaust gas, such as soot, nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC).

The ERF is designed to operate under low pressure conditions and is usually made of ceramic or metal fibers. It requires regular maintenance and replacement to ensure it continues to function effectively.

The use of a low-pressure ERF in combination with an EGR system has been shown to significantly reduce emissions and improve the overall efficiency of diesel engines. It is an important component in meeting emissions regulations and improving air quality.