Abstract: A method for operating a drive device having an internal combustion engine and an exhaust gas purification device for exhaust gas of the internal combustion engine includes performing an oxygen removal operation for removing oxygen from the exhaust gas purification device, wherein the oxygen removal operation includes at least one of operating the internal combustion engine sub-stoichiometrically and introducing additional fuel into the exhaust gas, wherein the oxygen removal operation is performed until a lambda value detected by a lambda probe arranged in the exhaust gas purification device reaches a defined lambda threshold value.

Abstract: A particle filter for an exhaust system, in particular of a motor vehicle, provided with a housing having an exhaust gas inlet and an exhaust gas outlet and a porous filter body being disposed in the housing, the filter body is provided with a cover surface and has a large number of flow channels running parallel in the direction of flow. Accordingly, in the filter body, a sensor well is formed to accommodate a sensor element, where such sensor well penetrates at least one of the flow channels. The disclosure further also concerns a procedure for the manufacture of a particle filter.

Abstract: A particulate filter for an exhaust system includes a housing having an exhaust inlet and an exhaust outlet. Arranged in the housing is a porous filter body which has a closed casing and plural flow passages extending in parallel relationship. The filter body defines a longitudinal center axis and has a conical configuration in relation to the longitudinal center axis, with each of the flow passages defining a longitudinal center axis which extends in parallel relationship to the longitudinal center axis of the filter body.

Abstract: A method for operating a drive device having an internal combustion engine and an exhaust gas purification device for exhaust gas of the internal combustion engine includes performing an oxygen removal operation for removing oxygen from the exhaust gas purification device, wherein the oxygen removal operation includes at least one of operating the internal combustion engine sub-stoichiometrically and introducing additional fuel into the exhaust gas, wherein the oxygen removal operation is performed until a lambda value detected by a lambda probe arranged in the exhaust gas purification device reaches a defined lambda threshold value.