A diesel particulate filter (DPF) combined with a three-way catalytic converter (CFC) is a self-heating filter that reduces black smoke emissions from diesel combustion. Due to the physical characteristics of diesel engines, exhaust contains black smoke and carbon particles. With growing environmental awareness and technological advancements, modern diesel vehicles can significantly reduce black smoke emissions by installing this device to comply with environmental regulations. All carbon particles produced by diesel combustion are intercepted and temporarily stored by the device. The hot exhaust gas from the engine then burns and decomposes the carbon particles stored in the filter, oxidizing them into carbon dioxide, which is then expelled through the exhaust system.