Abstract: A wastegate valve for a bypass path for a turbocharger in an internal combustion engine, the wastegate valve comprises a valve seat defining a plane which is non-orthogonal to the principal flow axis for gases flowing along the bypass path and a valve member pivotable from an open position to a closed position, wherein in the closed position the valve member is seated on the valve seat, and in a fully open position the valve member is positioned to direct gases exiting the bypass path onto a leading face of a catalytic converter monolith for heating the monolith.

Abstract: A wastegate valve for a bypass path for a turbocharger in an internal combustion engine, the wastegate valve comprises a valve seat defining a plane which is non-orthogonal to the principal flow axis for gases flowing along the bypass path and a valve member pivotable from an open position to a closed position, wherein in the closed position the valve member is seated on the valve seat, and in a fully open position the valve member is positioned to direct gases exiting the bypass path onto a leading face of a catalytic converter monolith for heating the monolith.

Abstract: A wastegate valve for a bypass path for a turbocharger in an internal combustion engine, the wastegate valve com- prises a valve scat defining a plane which is non-orthogonal to the principal flow axis for gases flowing along the bypass path and a valve member pivotable from an open position to a closed position, wherein in the closed position the valve member is seated on the valve seat, and in a frilly open position the valve member is positioned to direct gases exiting the bypass path onto a leading face of a catalytic converter monolith for heating the monolith.

Abstract: An exhaust-gas turbocharger (1), having a turbine (2) and a compressor (3) which is connected to the turbine (2) via a bearing housing (4) and which has a compressor housing (5). The compressor housing has a valve flange (6), provided with a valve seat (11), for an overrun air recirculation valve and has a connecting duct (9) which opens out at one end (9A) in a compressor inlet (7), a valve flange chamber (14) into which the other end (9B) of the connecting duct (9) opens out being arranged between a valve orifice (10) of the valve flange (6) and a valve seat orifice (13) of the valve seat (11). The valve flange chamber (14) is provided with a buffer volume (15).