Reducing agent supply system for exhaust gas cleaning catalyst of internal combustion engine, particularly of vehicle, has reducing agent tank for receiving reducing agent and electrically heated liquid line for conveying reducing agent

摘要

#CMT# #/CMT# The reducing agent supply system has a reducing agent tank (3) for receiving reducing agent and an electrically heated liquid line (6) for conveying the reducing agent from the reducing agent tank to an exhaust gas cleaning catalyst (1). A pump (5) is provided for pumping the reducing agent from the reducing agent tank. A section of the fluid line is formed as a metal pipe. A control unit (11) is provided for controlling the heat load that is affected by the temporal unit in the current operation, and the heating current flows in pulses through the metal tube. #CMT# : #/CMT# An independent claim is also include for a method for heating a pressure line of an urea utility system by a filament current. #CMT#USE : #/CMT# Reducing agent supply system for an exhaust gas cleaning catalyst of an internal combustion engine, particularly of a motor vehicle. #CMT#ADVANTAGE : #/CMT# The reducing agent supply system has a reducing agent tank for receiving reducing agent and an electrically heated liquid line for conveying the reducing agent from the reducing agent tank to an exhaust gas cleaning catalyst, and hence ensures a simple, economical and nonfreezing reducing agent utility system for a motor vehicle. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a urea utility system for an exhaust gas cleaning catalyst of a motor vehicle. 1 : Exhaust gas cleaning catalyst 3 : Reducing agent tank 5 : Pump 6 : Liquid line 11 : Control unit.