A heat exchanger disposed in an exhaust heat recovery device exchanges heat between exhaust and cooling fluid. An inner shell of the heat exchanger externally surrounds an exhaust pipe and forms a heat exchange space between the inner shell and the exhaust pipe to accommodate arranged plates. An outer shell of the heat exchanger includes an EGR opening that leads the exhaust to an inlet system of an internal combustion engine. The outer shell forms an external space leading to the EGR opening between the outer shell and the inner shell. The inner shell includes at least one aperture area that communicates the heat exchange space with the external space.

A tube (10) for an exhaust gas cooler comprises at least two projections (14), developed on the inside, of which at least one, implemented closer to the gas inlet, is developed lower in the direction toward the tube axis than at least one that is implemented closer to the gas outlet.

An exhaust gas cooler comprises at least one such tube.

A tube (10) for an exhaust gas cooler comprises at least two projections (14), developed on the inside, of which at least one, implemented closer to the gas inlet, is developed lower in the direction toward the tube axis than at least one that is implemented closer to the gas outlet.

An exhaust gas cooler comprises at least one such tube.

A motor vehicle heat exchanger system includes a closed circuit for a working medium and an evaporator for evaporation of the working medium. The evaporator includes at least two evaporator cassettes having an exhaust gas channel formed between the evaporator cassettes. Each evaporator cassette includes a capillary structure and a liquid side and a vapor side. A medium feed is provided on the liquid side for liquid working medium. Each evaporator cassette includes a vapor collector.

A motor vehicle heat exchanger system includes a closed circuit for a working medium and an evaporator for evaporation of the working medium. The evaporator includes at least two evaporator cassettes having an exhaust gas channel formed between the evaporator cassettes. Each evaporator cassette includes a capillary structure and a liquid side and a vapor side. A medium feed is provided on the liquid side for liquid working medium. Each evaporator cassette includes a vapor collector.

An engine includes an exhaust manifold, an intake manifold, and an EGR device configured to supply EGR gas from the exhaust manifold to the intake manifold. A longitudinal direction of the EGR cooler is in an up-down direction of the engine in a used state. The exhaust manifold has an EGR pipe that is connected to an EGR cooler, and a part of the EGR pipe extends in left-and-right directions. The part of the EGR pipe is provided at a side where a flywheel housing is provided. An upper end of the EGR cooler has a supply port into which the EGR gas is supplied from the exhaust manifold. The part of the EGR pipe and the flywheel housing are located in an up-down directions.

Various methods and systems are provided for an exhaust gas recirculation cooler including a plurality of cooling tubes. In one example, an exhaust gas recirculation (EGR) cooler includes a plurality of cooling tubes positioned within a housing of the EGR cooler, each cooling tube of the plurality of cooling tubes extending between and directly coupled to tube sheets of the EGR cooler at ends of each cooling tube, where at least one end of one or more cooling tubes of a first portion of the plurality of cooling tubes, inward of a tube sheet coupled to the at least one end, includes a compliant region, where the first portion is positioned proximate to an exhaust inlet of the EGR cooler.

Various methods and systems are provided for an exhaust gas recirculation cooler including a plurality of cooling tubes. In one example, an exhaust gas recirculation (EGR) cooler includes a plurality of cooling tubes positioned within a housing of the EGR cooler, each cooling tube of the plurality of cooling tubes extending between and directly coupled to tube sheets of the EGR cooler at ends of each cooling tube, where at least one end of one or more cooling tubes of a first portion of the plurality of cooling tubes, inward of a tube sheet coupled to the at least one end, includes a compliant region, where the first portion is positioned proximate to an exhaust inlet of the EGR cooler.

A heat exchange device includes: a first flow path through which a first fluid flows; a second flow path through which a second fluid flows, the second flow path being separated from the first flow path by a tubular partition wall and positioned close to an outer circumference of the tubular partition wall; an offset fin installed in a tubular shape extending along an inner circumferential surface of the tubular partition wall; and a pressing member disposed inward of the offset fin such that the offset fin is pressed toward the inner circumferential surface of the partition wall while being elastically deformed. The offset fin is provided with a plurality of wave-shaped portions arranged in an axial direction of the tubular partition wall and positions of wave-shapes of the wave-shaped portions adjacent to each other are offset from each other in a circumferential direction of the tubular partition wall.

An exhaust gas recirculation cooler may include a heat exchanger block including a first mounting flange, a diffuser including a second mounting flange, and at least one non-return valve arranged between the heat exchanger block and the diffuser. The exhaust gas recirculation cooler may also include a valve carrier which supports the at least one non-return valve and on which a gasket is arranged. The heat exchanger block may be connected via the first mounting flange directly to the second mounting flange of the diffuser. The valve carrier may be arranged between the heat exchanger block and the diffuser, and with the gasket may seal a sealing point between the first mounting flange and the second mounting flange. The diffuser may include an outwardly closed recess with a peripheral rim structured to accommodate the valve carrier. The rim may define the second mounting flange.