| 摘要 |
<p>The invention relates to a system (70) for the aftertreatment of an exhaust gas of an internal combustion engine with a reducing agent, comprising a tank (71) which contains the reducing agent, a catalytic converter (74) which is connected to an exhaust pipe (75) and which is traversed by exhaust gas, a nozzle (73) which opens out, upstream of the catalytic converter (74), into the exhaust pipe (75), wherein the tank (71) for the reducing agent is connected by means of a line (72) to the nozzle (73), and a metering pump which is arranged in the line (72) and which feeds the reducing agent under pressure from the tank (71) to the nozzle (73) in order to inject the reducing agent via the nozzle (73) into the exhaust pipe (75), wherein the metering pump is a hydraulically driven diaphragm pump (1) which has a piston which is longitudinally movable in the direction of the diaphragm (7) and which acts on the diaphragm (7) with hydraulic liquid (6), wherein the diaphragm pump (1) comprises a stroke magnet with an armature piston (24) which is surrounded by a magnet coil (26) and by means of which the piston (15) can be driven at least in the direction of the diaphragm (7).</p> |
