Heating unit i.e. glow plug, for vaporizer of exhaust-gas system, has housing provided as heat shield with cooling surfaces and cooling fins, where cooling surfaces and fins are provided for protecting sealing against heat influence

摘要

#CMT# #/CMT# The unit has a housing (30), and a heating section (24) attached to the housing, where the heating section is provided with a glow tube (28). A sealing (34) is arranged between a core of the heating unit and the glow tube and provided for sealing an inner area of the glow tube, where the length of the housing is larger than the length of the heating section. The housing is provided as a heat shield with cooling surfaces and cooling fins, where the cooling surfaces and fins are provided for protecting the sealing against heat influence. #CMT#USE : #/CMT# Heating unit i.e. glow plug, for a vaporizer of an exhaust-gas system (claimed) through which an exhaust gas of an internal combustion engine of a motor vehicle flows along a flow direction. #CMT#ADVANTAGE : #/CMT# The housing is provided as the heat shield with the cooling surfaces and cooling fins, and the surfaces and fins are provided for protecting the sealing against heat influence, so that the large portion of heat induced by the heating section is dissipated to the environment, and hence reducing the temperatures in the areas of the sealing strongly. The durability of the heating unit is increased. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic longitudinal sectional view of a heating unit. 22 : Vaporizer chamber 24 : Heating section 28 : Glow tube 30 : Housing 34, 36 : Sealings.