Exhaust gas conditioning device

摘要

The device includes a housing 1 forming a recombustion chamber between an inlet (10, fig 2) for exhaust gases and an outlet (13, fig 2) for exhaust gases. An expansion chamber (11, fig 2) causes the exhaust gases to slow down during passage through the recombustion chamber. An electrical discharge assembly 15 is mounted within the housing and includes an array of needles 16 forming multiple discharge points protruding from a matrix 18 of high temperature insulation material. The needles 16 are disposed opposite an electrostatic discharge plate 8. The assembly 15 is supplied with a high voltage which is controlled to produce an electrical discharge for particle capture alternating with a recombustion phase in which the supplied voltage is sufficient to cause a plasma discharge. The discharge assembly 15 includes an electrical heater 24 to increase the temperature of the assembly during plasma discharge.