Heat exchanger for an internal combustion engine comprising a deformation in a joining region of two separating walls, method for producing a heat exchanger and internal combustion engine comprising a heat exchanger

A heat exchanger for an internal combustion engine for transferring heat between at least two fluids, comprising:

• a housing having a housing wall and a housing interior which is at least regionally delimited by the housing wall, and which has a fluid inlet region for introducing a first fluid of the at least two fluids into the housing interior and a fluid outlet region for discharging the first fluid from the housing interior;
• at least two partitions which are accommodated at least predominantly in the housing interior and which are connected to the housing wall of the housing in a connecting region, and which, for purposes of separating the at least two fluids from one another, at least regionally delimit a fluid-receiving space through which a second fluid of the at least two fluids flows, wherein
• the at least two partitions are connected to one another at least at a joining region along edges of each of the at least two partitions which is assigned to the fluid inlet region and which adjoins the fluid-receiving space in a fluid main flow direction of the first fluid, and
• at least in a joining sub-region along the edges of each of the at least two partitions, which is spaced apart from the connecting region, of the joining region, the at least two partitions each have at least one deformation provided for reducing mechanical stresses at the connecting region resulting from a temperature-induced change in length of the joining region,
• wherein the at least one deformation of each of the at least two partitions are deformed in a same direction, and
• wherein the at least two partitions are continuously connected to one another along an entirety of each edge spanning across each of the at least one deformation of each of the at least two partitions.