Abstract: The invention relates to a heat exchanger, in particular a radiator for motor vehicles, comprising a black consisting of tubes and ribs and a lower and upper collection chamber, the lower collection chamber having several chambers which are separated from one another by partitions and between which a fluidic connection can be established. If necessary, by means of a displaceable actuator via connection orifices (17, 18, 19) that are located in a connection channel (16). According to the invention, the actuator is configured as a piston (30) that can be displaced axially between an open and a closed position and the cross-sections of the connection channel (16) and the piston (30) taper from the exterior to the interior in the vicinity of the connection orifices (17, 18, 19).

Abstract: The invention relates t a heat exchanger, in particular a radiator for motor vehicles comprising a black consisting of tubes and ribs and a lower and upper collection chamber, the lower collection chamber having several chambers which are separated from one another by partitions and between which a fluidic connection can be established. If necessary, by means of a displaceable actuator via connection orifices (17, 18, 19) that are located in a connection channel (16). According to the invention, the actuator is configured as a piston (30) that can be displaced axially between an open and a closed position and the cross-sections of the connection channel (16) and the piston (30) taper from the exterior to the interior in the vicinity of the connection orifices (17, 18, 19).

Abstract: Typical cooling modules for motor vehicle engines consist of a coolant radiator and a charge air cooler arranged in parallel. The coolant radiator and the charge air cooler are fixedly coupled to one another by a hinge-type connection of their feed cases. The present invention assigns a connection piece to the feed case of one of the coolers, which connects the fin/tube block on one side. The connection piece projects toward the other cooler and form-lockingly engages in a fastening opening on the feed case of the adjacent cooler. This connection piece is provided approximately in the center between two additional outer fastening points, so that a stable block is formed by the two feed cases. This is sufficient to uniformly distribute asymmetrically introduced forces to both coolers and thereby avoid overloading on one cooler.