The disclosure relates to an exhaust gas cooling device for an internal combustion engine, having a housing which can be connected to an exhaust gas line of the internal combustion engine and has an axis of symmetry and having a Venturi assembly coupled to the housing for introducing exhaust gas and ambient air and having an outlet line emitting an exhaust gas-ambient air mixture into the environment, wherein: the Venturi assembly has a Venturi channel which can be coupled fluidically to the exhaust gas line and an inlet opening delimited by the Venturi channel and the exhaust gas line for ambient air; the Venturi channel is used to conduct an exhaust gas-ambient air mixture and opens, with the inlet opening, into a mixing chamber; the Venturi channel has an outlet opening and the outlet opening has an inflow opening, wherein the outlet opening and the inflow opening are spaced apart from one another; the Venturi channel and the outlet line, with the inflow opening, open into the housing.

A vehicular exhaust device is disclosed. The vehicular exhaust device includes an exhaust pipe, which is connected at one end to an exhaust manifold of a cylinder and at the other end to a catalytic converter. In particular, an intermediate portion of the exhaust pipe is in contact with the side surface of the catalytic converter so as to heat the catalytic converter by heat of the exhaust pipe.

An exhaust system for an internal combustion engine, especially diesel internal combustion engine, includes an exhaust gas flow duct (12). At least one exhaust gas treatment unit (23, 26, 28, 30) is provided in an exhaust gas treatment duct area (16) of the exhaust gas flow duct (12). The exhaust gas treatment duct area (16) of the exhaust gas flow duct (12) extends, in at least some areas, in an insulation volume (20), through which exhaust gas discharged from the exhaust gas treatment duct area (16) can flow.

An SCR injection system for an internal combustion engine is disclosed. Under certain conditions, reductant fluid supplied by the system may form deposits in a reductant injector. In order to dissolve the deposits, a reductant supply line includes at least a portion with a downward slope that is disposed above a reductant inlet of the reductant injector. This allows reductant fluid in the sloped portion to flow to the reductant inlet due to gravity. Advantageously, a bent portion is provided between the reductant inlet and the sloped portion in order to trap reductant fluid that may flow back towards the reductant injector when the system is purged.

A component of the exhaust aftertreatment system includes a metallic body having a tapered portion. The component of the exhaust aftertreatment system further includes a curved plate arranged within the tapered portion of the metallic body. The curved plate has a plurality of perforations disposed on the curved plate to facilitate distribution of an exhaust mixture flowing through the curved plate across a surface of a substrate.

A heat exchanger for a motor vehicle may include an outer pipe through which hot gas may flow, the outer pipe extending along a longitudinal direction, defining an outer pipe interior, and including two outer pipe walls in a cross section perpendicular to the longitudinal direction. The heat exchanger may also include an inner pipe arranged in the outer pipe interior, the inner pipe extending along the longitudinal direction, being closed on a first longitudinal end, defining an inner pipe interior, and including two inner pipe walls in the cross section. The inner pipe walls may include a plurality of apertures by which the inner and outer pipe interiors may communicate fluidically. The heat exchanger may further have a plurality of thermoelectric modules arranged on an outer side of the outer pipe walls, each having a hot side facing the outer pipe and a cold side facing away from the outer pipe, and at least one coolant pipe through which a coolant may flow and which is arranged on the cold side of at least one thermoelectric module.

An exhaust gas treatment device, especially for an exhaust system of an internal combustion engine of a vehicle, includes a housing (12) elongated in a direction of a housing longitudinal axis (L). An exhaust gas treatment unit (18) is arranged in the housing (12). At least one first exhaust gas guiding device (24) is in flow connection with an axially open axial end area (16) of the housing (12). The first exhaust gas guiding device (24) provides a first flow path area (38) extending along an outer side (22) of the housing (12) as well as a second flow path area (47) connecting the first flow path area (38) with the axially open axial end area (16) of the housing (12).

A heat exchanger for a motor vehicle may include an outer pipe through which hot gas may flow, the outer pipe extending along a longitudinal direction, defining an outer pipe interior, and including two outer pipe walls in a cross section perpendicular to the longitudinal direction. The heat exchanger may also include an inner pipe arranged in the outer pipe interior, the inner pipe extending along the longitudinal direction, being closed on a first longitudinal end, defining an inner pipe interior, and including two inner pipe walls in the cross section. The inner pipe walls may include a plurality of apertures by which the inner and outer pipe interiors may communicate fluidically. The heat exchanger may further have a plurality of thermoelectric modules arranged on an outer side of the outer pipe walls, each having a hot side facing the outer pipe and a cold side facing away from the outer pipe, and at least one coolant pipe through which a coolant may flow and which is arranged on the cold side of at least one thermoelectric module.

A connection pipe (7), for the fluidic connection of a muffler housing (5) of an active muffler (4) with an exhaust gas-carrying pipe (3) of an exhaust line (2) of an exhaust system (1) for an internal combustion engine, of a motor vehicle, has a pipe wall (8), which envelopes a connection space (9) leading from the muffler housing to the exhaust pipe. A cooling pipe (14), through which a coolant can flow, has an inlet section (15) and an outlet section (16) and is arranged in the connection space. The inlet section (15) passes through the pipe wall (8), whereby a coolant inlet (17), through which coolant can enter the cooling air pipe, is arranged outside the connection pipe (7). The outlet section passes through the pipe wall, whereby a coolant outlet (19), through which coolant can escape from the cooling pipe, is arranged outside the connection pipe (7).

The disclosure relates to an exhaust gas sub-system for an internal combustion engine, having a catalytic converter with an inlet section for introducing an exhaust gas flow into the outer housing and having a feed line for secondary gas, the feed line having an inflow element at the end, which opens at the inlet section, the outer housing has an inlet opening for exhaust gas, an external heating element for heating the secondary gas and for generating hot gas being provided in the feed line upstream of the inflow element, at least one inflow opening in the outer housing being assigned to the inflow element, via which hot gas can be fed into the inlet section.