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This project deals with combustion generated engine emissions and approaches the subject from the point of fundamentals of engine combustion processes. The engines are therefore, categorized based on the mode of ignition employed viz., ‘Spark Ignition (SI) Engines’ and ‘Compression Ignition (CI) Engines’. Diesel particulate filters (DPF) also called as ‘particulate traps’ have been developed to filter out PM from the diesel exhaust gases to meet very stringent emission limits. Alumina coated wire mesh, ceramic fiber, porous ceramic monoliths etc., have been studied as filtration media. Presently, ceramic monolith of honeycomb type structure is used to trap the particulate matter as the gas flows through its porous walls. These filters are also termed as ‘ceramic wall flow filters’.
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