Theparticulate filter comprises a beehive-shaped ceramic body (silicon carbide).It is sub-divided into a number of small channels arranged in parallel, whichhave been positioned alternately. The exhaust gas contains the following gases:carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, sulphurdioxide, as well as soot particles and an additive. The additive, which ismixed into the fuel in fine traces, lowers the ignition temperature of thecarbon from 650 to 500 degrees.
- The ceramicbody, surrounded by fibre meterials and steel wool, is in the metal housing
- On the cutawaypart and also on the front and face surfaces, one recognises the alternatelyclosed and opened channels
- Gas particlescan escape through the pores of the side walls into the adjacent tubes, whereassoot and additive, as a result of their size, remain in the middle tube
- Gas particlescan escape to the back into the exhaust pipe
- After about500 to 700 kilometres of driving, there is regeneration (the soot is burntoff).