Apparatus and method for exhaust gas purification systems of diesel vehicles, in particular for retrofitting diesel existing vehicles with a diesel particulate filter, in particular for urban driving

摘要

The invention relates to a device for exhaust gas purification systems of diesel vehicles, in particular for retrofitting diesel existing vehicles with a diesel particulate filter, especially for urban driving, in the exhaust system of the diesel vehicle at least one high-pressure injector (HDEV), at least one electrically heated oxidation catalyst (E -DOC) and at least one NO storage catalytic converter (NSC) are arranged in the flow direction of the exhaust gas functionally one behind the other, the heater of the E-DOC below the light-off temperature of the E-DOC the temperature in the E-DOC to the required Light -Off temperature of the E-DOC raises, when reaching the light-off temperature of the E-DOC installed before the E-DOC HDEV fuel into the exhaust system, so that by the catalytic conversion of the metered fuel, a further temperature increase in E -DOC is done by exothermic reaction of the fuel, which is the temperature in the NSC into a range of optimal NO conversion brings.