초록 ▼

An exhaust gas treatment system for an internal combustion engine, particularly a diesel internal combustion engine having a catalyst arrangement and also at least one evaporator/burner arrangement upstream of the catalyst arrangement in the exhaust gas flow path, the evaporator/burner arrangement i

An exhaust gas treatment system for an internal combustion engine, particularly a diesel internal combustion engine having a catalyst arrangement and also at least one evaporator/burner arrangement upstream of the catalyst arrangement in the exhaust gas flow path, the evaporator/burner arrangement including a housing arrangement, with an evaporator/burner chamber formed therein which is open to the exhaust gas flow path, an evaporator medium for receiving liquid hydrocarbon and for delivering hydrocarbon vapor to the evaporator/burner chamber, a heating device for heating the evaporator medium, and an ignition device for starting the combustion of the hydrocarbon vapor present in the evaporator/burner chamber.

대표청구항 ▼

What is claimed is: 1. A method of operating an exhaust gas treatment system for an internal combustion engine, comprising: a catalyst arrangement (16) and at least one evaporator/burner arrangement (20) upstream of the catalyst arrangement (16) in an exhaust gas flow path (14), the evaporator/burn

What is claimed is: 1. A method of operating an exhaust gas treatment system for an internal combustion engine, comprising: a catalyst arrangement (16) and at least one evaporator/burner arrangement (20) upstream of the catalyst arrangement (16) in an exhaust gas flow path (14), the evaporator/burner arrangement including: a housing arrangement (21) with an evaporator/burner chamber (22) formed therein and open to the exhaust gas flow path (14), an evaporator medium (34) for receiving liquid hydrocarbon and for delivering hydrocarbon vapor to the evaporator chamber (22), a heating device (38) for heating the evaporator medium (34), and an ignition device (42) for starting a combustion of the hydrocarbon vapor present in the evaporator/burner chamber (22) , which method comprises the following step: when it is determined that an exhaust gas temperature of the exhaust gases (A) leaving an internal combustion engine is under a predetermined threshold not sufficiently high to start or maintain a suitable catalytic reaction in the catalyst arrangement (16), operating the at least one evaporator/burner arrangement (20) at least in phases for combustion of at least a portion of the hydrocarbon vapor produced therein, wherein, when it is determined that the exhaust gas temperature of the exhaust gases leaving the internal combustion engine is above a predetermined threshold, sufficiently high to start or maintain a suitable catalytic reaction in the catalyst arrangement ( 16), operating the at least one evaporator/burner arrangement ( 20) at least in phases for producing hydrocarbon vapor to be mixed with the exhaust gases (A) of the internal combustion engine.