Abstract: The invention relates to an exhaust gas heat exchanger (1) with a housing (2), in which a tube bundle (3) with multiple tubes (4) is held via headers (5, 6), wherein in the tubes (4) a first flow path for exhaust gas (7) and between the tubes (4) and the housing (2) a second flow path for coolant (8) runs, wherein the first longitudinal ends of the individual tubes (4) of the tube bundle (3) are incorporated in a first header (5) in a fixed manner, in particular welded or brazed. It is substantial to the invention that at least one of the tubes (4) is axially moveable in the region of a second longitudinal end relative to the second header (6) and captive therein.

Abstract: An exhaust gas heat exchanger, in particular for use in a motor vehicle, having at least one first flow channel that conducts a first fluid, which first flow channel is accommodated in respective tube sheets at end areas of the first flow channel. A housing surrounds the first flow channel and forms a second flow channel for a second fluid that flows through the housing and flows around the first flow channel. Pipe sheets are inserted into the housing such that the first flow channel is sealed off from the second flow channel. A first diffuser conducts the first fluid into the first flow channel and a second diffuser conducts the first fluid out of the first flow channel. A first shielding element has a first passage and a first spacing element is placed onto a tube sheet from the side facing away from the first flow channel.

Abstract: An internal combustion engine may include a housing and at least one cavity arranged therein for receiving a coolant flow. An exhaust gas cooler may be provided for cooling an exhaust gas flow. The exhaust gas cooler may be configured as a stacked disc cooler including at least two stacking discs, an exhaust gas inlet, a cover plate and a screw-mounting plate for screw-mounting to the housing. The exhaust gas cooler may protrude into the cavity of the housing when the screw-mounting plate is mounted to the housing. The screw-mounting plate may have a spacer element disposed at the exhaust gas inlet. The spacer element may protrude in a direction of the at least two stacking discs and enlarge a distance between the screw-mounting plate and an adjacent stacking disc of the at least two stacking discs to position the exhaust gas cooler further into the cavity.

Abstract: A device for the exchange of heat between a first and a second medium with pairs of trays stacked one on top of the other in a stacking direction is provided, wherein a first flow chamber that can be flowed through by a first medium is provided between the two trays of at least one pair of trays or several pairs of trays and a second flow chamber that can be flowed through by a second medium is provided between two pairs of trays adjacent to one another, wherein the first flow chamber has first flow path with flow path sections that can be flowed through consecutively in opposite directions for the first medium, which are separated from one another by a division wall arranged between the at least two trays of the at least one pair of trays, and wherein the second flow chamber has a second flow path for the second medium.

Abstract: An exhaust gas system for a motor vehicle may include an exhaust gas aftertreatment device communicating fluidically with an exhaust gas evaporation device. The exhaust gas aftertreatment device and the exhaust gas evaporation device may be arranged in one or more housings. A connecting line may be provided to fluidically connect the exhaust gas aftertreatment device to the exhaust gas evaporation device. The connecting line may include a fluid inlet connected to the exhaust gas aftertreatment device and a fluid outlet connected to the exhaust gas evaporation device. An evaporation bypass line may branch off from the connection line at a branching-off point. A valve apparatus may be arranged in at least the connecting line and may be adjustable between a first position to fluidly connect the fluid inlet to the fluid outlet, and a second position to fluidly connect the fluid inlet to the evaporator bypass line.

Abstract: The invention relates to an exhaust gas heat exchanger (1) with a housing (2), in which a tube bundle (3) with multiple tubes (4) is held via headers (5, 6), wherein in the tubes (4) a first flow path for exhaust gas (7) and between the tubes (4) and the housing (2) a second flow path for coolant (8) runs, wherein the first longitudinal ends of the individual tubes (4) of the tube bundle (3) are incorporated in a first header (5) in a fixed manner, in particular welded or brazed. It is substantial to the invention that at least one of the tubes (4) is axially moveable in the region of a second longitudinal end relative to the second header (6) and captive therein.

Abstract: An internal combustion engine may include a housing and at least one cavity arranged therein for receiving a coolant flow. An exhaust gas cooler may be provided for cooling an exhaust gas flow. The exhaust gas cooler may be configured as a stacked disc cooler including at least two stacking discs, an exhaust gas inlet, a cover plate and a screw-mounting plate for screw-mounting to the housing. The exhaust gas cooler may protrude into the cavity of the housing when the screw-mounting plate is mounted to the housing. The screw-mounting plate may have a spacer element disposed at the exhaust gas inlet. The spacer element may protrude in a direction of the at least two stacking discs and enlarge a distance between the screw-mounting plate and an adjacent stacking disc of the at least two stacking discs to position the exhaust gas cooler further into the cavity.

Abstract: A heat exchanger for an exhaust gas cooler may include a substantially fluid-tight housing for conducting a first mass flow. At least one heat-permeable tube may extend in the housing for conducting a second mass flow. The housing and an outer surface of the at least one tube may define at least two parallel flow paths for the first mass flow. A plate at least partially containing the at least one tube may delimit the at least two flow paths on a face end. A connection may be arranged in a region of the plate for introducing the first mass flow into the housing. The outer surface of the at least one tube may have an elevation configured to distribute the first mass flow substantially uniformly after entering the housing and divide the first mass flow substantially uniformly among the at least two flow paths.

Abstract: An evaporator heat exchanger for evaporating a liquid working medium may include a housing, in which at least one first flow channel for conducting the working medium and at least one second flow channel for conducting a gas may be arranged, where heat may be transferable from the gas to the working medium. The evaporator heat exchanger may also include a plurality of cover plates and a profiled fluid plate arranged in between two of the cover plates. The at least two cover plates and the profiled fluid plate may form the at least one first flow channel, and at the same time may delimit at least one of at least one leakage channel and a leakage space that is separated from the at least one first flow channel and at least one second flow channel.

Abstract: The invention relates to a system for using the waste heat of an internal combustion engine by means of the Clausius-Rankine cycle, wherein an incorporation of an operating medium into the combustion air fed to the combustion engine due to lack of sealing or a leak at the evaporator heat exchanger is substantially ruled out.

Abstract: In an internal combustion engine having a system for utilizing the waste heat from the internal combustion engine via the Clausius-Rankine cycle, a system includes a circuit having lines with a working medium, a working medium pump, a vaporizer-exhaust gas heat exchanger, and a vaporizer-EGR heat exchanger, an expander, and a condenser for liquefying the vaporous working medium. The line for the working medium is run from the condenser to the vaporizer-EGR heat exchanger so that the working medium, after flowing through the condenser, first flows through the vaporizer-EGR heat exchanger, and the line for the working medium is run from the vaporizer-EGR heat exchanger to the vaporizer-exhaust gas heat exchanger so that the working medium, after flowing through the vaporizer-EGR heat exchanger, first flows through the vaporizer-exhaust gas heat exchanger.

Abstract: A system for utilizing waste heat of an internal combustion engine via the Clausius-Rankine cycle process is provided that includes a circuit with lines containing a working medium, an evaporator heat exchanger which serves for evaporating the liquid working medium using waste heat of the internal combustion engine and which has an inlet opening for conducting the working medium into a flow duct and an outlet opening for conducting the working medium out of the flow duct, and the flow duct is divided into a plurality of flow duct parts connected hydraulically in parallel, an expansion machine, a condenser for liquefying the vaporous working medium, a collecting and compensating vessel for the liquid working medium, it is sought to be able to change the working medium substantially completely from a liquid state of aggregation to a gaseous state of aggregation at an evaporator heat exchanger.

Abstract: An exhaust gas heat exchanger, in particular for use in a motor vehicle, having at least one first flow channel that conducts a first fluid, which first flow channel is accommodated in respective tube sheets at end areas of the first flow channel. A housing surrounds the first flow channel and forms a second flow channel for a second fluid that flows through the housing and flows around the first flow channel. Pipe sheets are inserted into the housing such that the first flow channel is sealed off from the second flow channel. A first diffusor conducts the first fluid into the first flow channel and a second diffusor conducts the first fluid out of the first flow channel. A first shielding element has a first passage and a first spacing element is placed onto a tube sheet from the side facing away from the first flow channel.

Abstract: The invention relates to a heat exchanger, such as in particular an exhaust-gas evaporator, having a housing with a fluid inlet, and with a fluid outlet for a first medium, such as in particular exhaust gas, and having tubes which are arranged in the housing transversely with respect to the flow direction of the first fluid and through which a second medium can flow and which, by way of their ends at the inlet side and at the outlet side are arranged and connected in a fluid tight manner in a tube plate, wherein, to the respective tube plate, there is connected in each case one structure by means of which groups of tubes are connected to one another in such a way that an outlet of at east one tube is fluidically connected to an inlet of at least one other tube.

Abstract: A heat exchanger may include a gas conduit flowable through by a predetermined gas and a heat conduit flowable through by a predetermined fluid compound working fluid. The heat conduit may be in thermal communication with the gas conduit. The heat exchanger may include a first section having a first section length, a second section having a second section length, and a third section having a third section length. The gas conduit may span, in a direction of flow of the gas, the first section, the second section, and the third section. The heat conduit may span, in a direction of flow of the working fluid, the third section, the first section, and the second section. The first section may include a gas inlet and the third section may include a working fluid inlet and a gas outlet. The section may include a working fluid outlet.

Abstract: A device for cooling a gas flow of an internal combustion engine includes a housing, an inlet and an outlet for a gas of the internal combustion engine, which is to be cooled, an inlet and an outlet for a liquid coolant, a heat exchanger for heat transfer between the gas and the coolant, a first wall section of the housing, wherein the first wall section is arranged between the coolant and the gas flow, and a second wall section of the housing, wherein the second wall section is arranged between the coolant and the atmosphere, wherein the first wall section and the second wall section are integrally formed in one piece.

Abstract: Disclosed herein is a heat exchanger with a housing casing, a first base and a second base with openings, pipes as a first flow channel for conducting a first fluid, the ends thereof being arranged in or on the openings of the first and second bases, the pipes and the first and/or the second base are arranged within the housing so that a second flow channel for conducting a second fluid is designed between the housing and the pipes, a first inlet opening for the first fluid, a first outlet opening for the first fluid, a second inlet opening for the second fluid, a second outlet opening for the second fluid, a first diffusor for directing the first fluid into the pipes, a second diffuser for directing the first fluid out of the pipes, which heat exchanger should be simple and cost-effective to produce and ensure reliable operation.

Abstract: The invention relates to an air-cooled exhaust gas heat exchanger, in particular exhaust gas cooler (1) for motor vehicles comprising channels (exhaust gas channels) which can be cross-flown by the exhaust gas of an internal combustion engine, between which ribs (4) for air cooling are arranged. According to the invention, the exhaust gas channels are embodied as tubes, in particular as flat tubes (3), which form the ribs (4) of a rib tube block (2) and the tube (3) has tube ends (3a) which are received in the collecting vessels (5) for the exhaust gas.

Abstract: The invention relates to a heat exchanger, particularly for a motor vehicle, comprising a plurality of exchanger tubes (3) attached to at least one floor for conveying a first fluid, wherein the exchanger tubes (3) are disposed in a housing through which a second fluid flows, wherein a holding member (5) is disposed inside the housing, wherein at least two of the exchanger tubes (3) are supported relative to one another by means of the holding member (5).

Abstract: A heat exchanger, particularly an exhaust gas heat exchanger, for transferring heat in two stages between a first fluid and second and third fluids that have different temperatures includes a block for separately conducting the first and second and third fluids in a heat transferring manner. The block encompasses a number of ducts through which the first fluid can flow, a first chamber of a high-temperature part through which the second fluid can flow and which accommodates the ducts, a second chamber of a low-temperature part through which the third fluid flows and which accommodates the ducts, and a housing in which the first and second chamber as well as the ducts are arranged. The first chamber and the second chamber are separated from one another by a separation area that is mounted in a groove.