Behr Gmbh Co. Kg

Universitãt Stuttgart

Mahle Behr Gmbh & Co. Kg

Bernd Weiler

Franco Ghiani

Daniel Hendrix

Karsten Emrich

Claus Augenstein

Reinhard Kull

Stefan Weise

Klaus Förster

Martin Engelhardt

Scott Horoho

Andre Schairer

Christian W Grosse

H W Reinhardt

G&uuml;nther Schmidt

Alexander Herb

The invention relates to a heat exchanger for motor vehicles, especially for utility vehicles. The heat exchanger can include a heat exchanger unit that includes tubes having tube ends and ribs disposed between the tubes, and collecting tanks disposed on both ends and produced by internal high pressure forming for introducing and discharging a medium. The collecting tanks can include bottoms with openings for receiving the tube ends, covers, and inlet and outlet tubes.

Charge-air cooler for motor vehicles

A method is described for examining a solidifying and/or hardening material such as cement, concrete or the like, using ultrasound waves emitted by an ultrasound transmitter, which penetrate the solidifying and/or hardening material, are continuously measured and analyzed. During solidification and/or hardening of the material, the signal shapes of the ultrasound waves penetrating the material, are recorded. The change with time of the compression wave velocity and/or the relative energy of the ultrasound waves and/or the frequency spectra of the ultrasound waves is extracted from the ultrasound wave shapes during the entire course of solidification and/or hardening of the material. This change with time of the compression wave velocity and/or the relative energy of the ultrasound waves and/or the frequency spectra of the ultrasound waves is approximated through a compensating function, preferably the Boltzmann function. The free parameters of the compensation function are associated with material properties and permit comparison of a current measurement with reference values of these parameters to permit determination of material properties of the examined material. A receptacle and an ultrasound transmitter for carrying out the method also are described.

Method for examining a solidified and/or hardening material using ultrasound, receptacle and ultrasound sensor for carrying out the method

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Urbach, Germany

Bernd Weiler