Heat engine depollution arrangement for motor vehicle, has lower evaporation device with pipe in which plate is arranged, and plate holder maintained by junction ring placed between lower end of another pipe and upper end of former pipe

摘要

#CMT# #/CMT# The arrangement has a lower evaporation device (12) with a pipe (22) in which a plate (24) is arranged. The plate is oriented axially in a direction of flow of an exhaust gas stream, and is remote from walls (26) of the pipe. The plate delimits, in the pipe, two exhaust gas stream flow sections, and is fixed to a plate holder (48) by welding or pressing the holder. The holder is maintained by a junction ring (50) placed between a lower end (16) of another pipe comprising a liquid component release device (10), and an upper end (18) of former pipe (22) comprising the device (12). #CMT#USE : #/CMT# Arrangement for depollution of a heat engine of a motor vehicle. #CMT#ADVANTAGE : #/CMT# The plate is maintained in the pipe by the junction ring, thus permitting vaporization of the liquid component released in the pipe. The arrangement is designed such that the lower evaporation device does not oppose the exhaust gas flow, and permits an optimal vaporization of a liquid component. The plate has a reduced thickness for permitting rapid heating of the plate in the exhaust gas flow, during engine starting phase, thus allowing vaporizing the liquid component in a rapid manner. The evaporation device can be easily mounted in an exhaust conduit. The arrangement permits to improve performance of a depollution unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a heat engine depollution arrangement in which a pipe comprises a plate fixed to a plate holder maintained in the pipe by an annular ring. 10 : Liquid component release device 12 : Lower evaporation device 16 : Lower end 18 : Upper end 22 : Pipe 24 : Plate 26 : Walls 48 : Plate holder 50 : Junction ring.