Abstract: A method for operating a supercharged internal combustion engine. Before a cold start of the engine, an electric drive device of an electrically assisted exhaust-gas turbocharger of the engine is activated such that fresh air is compressed by a compressor of the turbocharger and, in the process, is heated and is conveyed via an open overrun air recirculation valve arranged downstream of the compressor, through a short circuit back to a suction side of the compressor of the turbocharger. A proportion of the air that is heated by way of the short-circuit operation of the compressor is, downstream of the compressor and upstream of a closed throttle flap of the engine, conducted via a secondary air system into an exhaust manifold and from there via a wastegate of the turbocharger into the catalytic converters of an exhaust-gas aftertreatment device of the engine.

Abstract: An exhaust gas system for a motor vehicle includes an exhaust gas burner and a pressure sensor for sensing flame formation in the exhaust gas burner.

Abstract: An exhaust gas system for a motor vehicle includes an exhaust gas burner and a pressure sensor for sensing flame formation in the exhaust gas burner.

Abstract: A method is provided for producing at least one ash-forming element (1) for a particulate filter of an exhaust gas system of a gasoline engine or diesel engine. The method includes providing of a strip-shaped center layer (3), and making receiving holes (6) in the center layer (3). The method continues by providing of a strip-shaped bottom layer (4), and permanently connecting of the bottom layer (4) to the center layer (3). The method proceeds by filling the receiving holes (6) of the center layer (3) with ash-forming components (2), providing a strip-shaped top layer (5), and permanently connecting the top layer (5) to the center layer (3). The method then includes punching out of at least one ash-forming means (1) from the wafer, and making throughflow openings (7) in regions where there are no ash-forming components (2).

Abstract: A method is provided for producing at least one ash-forming element (1) for a particulate filter of an exhaust gas system of a gasoline engine or diesel engine. The method includes providing of a strip-shaped center layer (3), and making receiving holes (6) in the center layer (3). The method continues by providing of a strip-shaped bottom layer (4), and permanently connecting of the bottom layer (4) to the center layer (3). The method proceeds by filling the receiving holes (6) of the center layer (3) with ash-forming components (2), providing a strip-shaped top layer (5), and permanently connecting the top layer (5) to the center layer (3). The method then includes punching out of at least one ash-forming means (1) from the wafer, and making throughflow openings (7) in regions where there are no ash-forming components (2).