SSP 350 – The 3.0l V6 TDI engine - Volkspage

StructureThe diesel particulate filter is comprised of ahoneycombshaped ceramic body manufactured fromsilicon carbide, which is contained in a metal housing.The ceramic body is sub-divided into a multitude ofsmall channels, which are sealed on alternating sides.This results in intake and exhaust channels which areseparated by filter walls.The silicon carbide filter walls are porous and arecoated with a substrate comprised of aluminium oxideand cerium oxide. The precious metal platinum, whichserves as the catalyst, is vapour-deposited onto thissubstrate.The cerium oxide coating in the particulate filterlowers the carbon's ignition temperature andaccelerates the thermal reaction with oxygen.Connections for exhaust gaspressure sensor 1 G450Bank 1 exhaust gas temperaturesender 2 G448S350_062Metal housingCeramic bodyFunctionThe exhaust gas, which contains carbon, flowsthrough the intake channels' filter walls. Unlike thegaseous components of the exhaust gas, the carbonparticles are retained in the intake channels.S350_03633