Patent ID: 7581386

Claim:
A motor vehicle with a diesel propulsion engine and an exhaust system that is equipped with a discontinuously regenerating exhaust gas purification system comprising: a fuel evaporator unit provided upstream of the discontinuously regenerating exhaust gas purification system to enrich engine exhaust gases with fuel vapors, the fuel evaporator unit being connected to a vehicle fuel tank; the fuel evaporator unit including a fuel evaporator in the form of a heat exchanger that is exposed to an exhaust gas stream, the heat exchanger having a fuel supply line and a fuel vapor discharge opening, and the fuel evaporator unit including an auxiliary oxidizing converter that is upstream of the heat exchanger; an intermediate tube that connects the auxiliary oxidizing converter to the discontinuously regenerating exhaust gas purification system, the heat exchanger being located within the exhaust gas flow in the intermediate tube and including an axially extending tubular portion defined by a reduced diameter and terminating at the fuel vapor discharge opening to direct fuel vapors toward the discontinuously regenerating exhaust gas purification system; and wherein a percentage of nonburned diesel fuel in exhaust gases fed to the auxiliary oxidizing converter is adjustable using an enrichment device.