Patent ID: 7877990
Filing Date: 2011-02-01
Classification: F01N,Y02A,Y02T

Abstract:
1. A metering device ( 100 ) having an injector module for introducing an operating medium into an exhaust tract ( 140 ) of an internal combustion engine ( 210 ), having a cooling system for cooling the injector module ( 110 ) of the metering device ( 100 ), with the cooling system having a cooling circuit ( 115 ) with a cooling fluid and with at least one cooling device ( 120 ) which dissipates heat from the cooling circuit ( 115 ), characterized in that a first part ( 115 a ) of the cooling circuit ( 115 ) is arranged at least partially below the cooling device ( 120 ) and a second part ( 115 b ) of the cooling circuit ( 115 ) is arranged at least partially above the injector module ( 110 ) which heats the cooling circuit, such that circulation of the cooling fluid in the cooling circuit ( 115 ) is generated solely by a convection flow of the cooling fluid, in such a way that the first part ( 115 a ) of the cooling circuit serves exclusively for conducting the cooling fluid to the heating point and the second part ( 115 b ) of the cooling circuit serves exclusively for conducting the cooling fluid to the cooling device ( 120 ).