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The DPF (diesel particulate filter) removes the slight amount of particulate matter which remains in the exhaust gas after combustion of the fuel by the common rail system. There are many small cells with a diameter of three hundredths of a millimeter (less than 1.2 thousandths of an inch) inside the filter. These cells trap particulate matter contained in the exhaust gas as it passes through them.
After a certain amount of particulate matter is collected, it is burned by applying heat. To assist with this combustion, the filter is coated with a catalyst. Catalysts are substances that speed up a chemical reaction. The filter removes and cleans more than 90% of the particulate matter contained in the exhaust gas. |
| *DPF:Diesel Particulate Filter |
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