Mahle International Gmbh

Martin Paarmann

Boris Kerler

Steffen Groezinger

Alexander Meiser

Tobias Fetzer

Thomas Seeger

David Kenntner

Henning Schroeder

Juergen Kaiser

Wael Nassar

Voker Velte

A heat exchanger may include a block for separately conducting first and second fluids, and a box. The block may have flat tubes through which the first fluid is flowable and each of which may have a narrow tube side and a wide tube side. The box may have a base, the flat tubes being guided into the base via corresponding through-openings in the base. Each through-opening may have at least one raised edge, with at least one narrow edge side and at least one wide edge side, surrounding the corresponding flat tube. The wide edge side may be higher than the narrow edge side. The two may transition into one another via an inclination with a recess that may have a height lower than that of the narrow edge side. A contact surface edge may have a height lower at the recess than at the narrow edge side.

Heat exchanger

An exhaust gas cooler may include a plurality of stacked disc pairs. A first flow chamber for a coolant flow may be disposed between two discs of at least a first disc pair of the plurality of disc pairs. A second flow chamber for an exhaust gas flow may be disposed between two second disc pairs of the plurality of disc pairs arranged mutually adjacent with respect to one another. The plurality of stacked disc pairs may include at least one coolant inlet and at least one coolant outlet. The first disc pair may include a plurality of coolant inlets and a plurality of coolant outlets surrounding an edge of the first disc pair to facilitate peripheral edge cooling.

Exhaust gas cooler

An exhaust gas cooler may include an outer housing and an inner housing having a heat exchanger insert arranged therein. The heat exchanger insert may include a plurality of pipes around which exhaust gas flows transversely in the inner housing and through at least some of which a coolant of a first cooling circuit flows. At least a portion of the outer housing may be cooled by a second cooling circuit. The second cooling circuit may be separate from the first cooling circuit.

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Stuttgart, Germany

Martin Paarmann