Abstract: A heat exchanger, in particular exhaust-gas cooler, is described herein. The heat exchanger includes tubes of unipartite form or formed from two plates. The tubes form a first and a second fluid duct, and the respective fluid ducts are arranged adjacent to one another. The first fluid duct is designed to be open at at least one of its ends for the inflow and/or outflow of a first fluid. The second fluid ducts are closed at an end side of the tubes by way of an inward or outward step. The step has a greater extent T in the tube longitudinal direction in the corner regions of the tube than between the corner regions. Several non-limiting descriptive embodiments are disclosed herein.

Abstract: The invention relates to a heat exchanger, in particular exhaust-gas cooler or charge-air cooler, comprising a plate stack composed of multiple elongate plate pairs, wherein in each case two interconnected plates form a first fluid duct between them, and a second fluid duct is formed between two plate pairs, wherein the plates of a plate pair are of U-shaped form with a bottom and upturned side walls and lie against one another so as to delimit the first flow duct, wherein one of the plates of a plate pair has, on its end side, a tab which serves for beading over around the end side of the other plate, wherein the tab on the bottom of the plate is beaded over, and the beading-over of the tab also continues into the side walls of the plates.

Abstract: The invention relates to a heat exchanger comprising a block of first and second flow channels arranged adjacently to one another, said block being designed to be open at one inflow side and at one outflow side of the first flow channels for the inflow and outflow of a first fluid into or out of said first flow channels, and the second flow channels comprising openings for the inflow and outflow of a second fluid, said block consisting of a first element and a second element, each of these forming second flow channels and a side wall, and these elements being joined together such that the two side walls form block side walls which lie opposite one another, said second flow channels extending between these side walls and forming first flow channels between themselves and the side walls.

Abstract: The invention relates to a heat exchanger having a tube bundle with tubes as heat exchanger matrix, it being possible for the tubes to be flowed through by a first fluid and in this way defining a first fluid channel, and to be flowed around by a second fluid and in this way defining a second fluid channel, the tube bundle being configured so as to be closed off toward the outside, in order to close off the second fluid channel, or being arranged in a housing, in order to close off the second fluid channel, the tubes being configured so as to be open on the end side for the inflow or outflow of the first fluid.

Abstract: The invention relates to a heat exchanger comprising a block of first and second flow channels arranged adjacently to one another, said block being designed to be open at one inflow side and at one outflow side of the first flow channels for the inflow and outflow of a first fluid into or out of said first flow channels, and the second flow channels comprising openings for the inflow and outflow of a second fluid, said block consisting of a first element and a second element, each of these forming second flow channels and a side wall, and these elements being joined together such that the two side walls form block side walls which lie opposite one another, said second flow channels extending between these side walls and forming first flow channels between themselves and the side walls.

Abstract: The invention relates to a heat exchanger having a tube bundle with tubes as heat exchanger matrix, it being possible for the tubes to be flowed through by a first fluid and in this way defining a first fluid channel, and to be flowed around by a second fluid and in this way defining a second fluid channel, the tube bundle being configured so as to be closed off toward the outside, in order to close off the second fluid channel, or being arranged in a housing, in order to close off the second fluid channel, the tubes being configured so as to be open on the end side for the inflow or outflow of the first fluid.

Abstract: The invention relates to a heat exchanger, in particular exhaust-gas cooler or charge-air cooler, comprising a plate stack composed of multiple elongate plate pairs, wherein in each case two interconnected plates form a first fluid duct between them, and a second fluid duct is formed between two plate pairs, wherein the plates of a plate pair are of U-shaped form with a bottom and upturned side walls and lie against one another so as to delimit the first flow duct, wherein one of the plates of a plate pair has, on its end side, a tab which serves for beading over around the end side of the other plate, wherein the tab on the bottom of the plate is beaded over, and the beading-over of the tab also continues into the side walls of the plates.

Abstract: The invention relates to a heat exchanger, in particular exhaust-gas cooler, having tubes of unipartite form or formed from two shell-like plates, which tubes form a first and a second fluid duct, wherein the respective fluid ducts are arranged adjacent to one another, wherein the first fluid duct is designed to be open at at least one of its ends for the inflow and/or outflow of the first fluid, wherein, at the ends, the tubes are, by way of an inward or outward step, designed such that the second fluid ducts are closed at the end side, wherein the step has a greater extent T in the tube longitudinal direction in the corner regions of the tube than between the corner regions.

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: The invention relates to a heat exchanger for cooling a fluid for an internal combustion engine, in particular, a gas, for example, in the form of a charge fluid such as exhaust gas, charge air, mixtures thereof or similar, in particular for an internal combustion engine on a motor vehicle, said exchanger preferably being a gas cooler, comprising an inner tubular piece (1) with a least one channel (3) and an outer tubular piece (2). According to the invention, a web (7) is arranged on at least one of the inner tubular piece (1), or outer tubular piece (2), said web (7) running to the other of the inner tubular piece (1) or outer tubular piece (2).

Abstract: A valve device for controlling a recycled, gaseous fluid and/or for heat exchanger/bypass control for a heat exchanger of an internal combustion engine of a motor vehicle, with at least one valve body, and with at least one valve housing for receiving at least part of the valve body. The valve housing has at least one inlet opening for the inflow of a gaseous fluid, at least one first outlet opening for supplying a heat exchanger with gaseous fluid, and at least one second outlet opening for causing the gaseous fluid to bypass the heat exchanger. The valve body has at least one first valve-body partial element which is in the manner of a hollow body and is intended for controlling the flow rate through at least one outlet opening, and at least one second valve-body partial element which is at least partially of conical design and is intended for controlling the flow rate through the inlet opening.