Behr Gmbh Co. Kg

Mahle International Gmbh

Mahle Behr Gmbh & Co. Kg

Matthias Pfitzer

Peter Englert

Thomas Strauss

Wolfgang Knödler

Ingo Trautwein

Snjezana Boger

Sabine Sedlmeir

Richard Brümmer

Hans Koch

Dieter Gross

Roger Gorges

Bernd Grünewald

Snjezana Boger Boger

A cooler passivation process for a coolant cooler of a cooler device mounted in a motor vehicle A cooler device with a coolant cooler is provided, the latter having at least one aluminum cooling channel with a cooler surface provided with flux. The cooler device is provided in a motor vehicle and is then put into operation with at least one fuel cell of the motor vehicle. In order to form a passivation layer on the coolant cooler, according to the invention a previously provided aqueous passivation solution is formed from passivation layer forming material and fuel cell wastewater is applied to the cooler surface, provided with the flux, of the at least one aluminum cooling channel, the passivation solution reacting with the cooler surface, provided with the flux, of the at least one aluminum cooling channel while thermal energy provided by the coolant cooler is supplied, forming a passivation layer.

Cooler passivation process for a coolant cooler of a cooler device mounted in a motor vehicle, cooler device, and use of a motor vehicle to passivate a coolant cooler of a cooler device

A heat exchanger, in particular a heat exchanger of a motor vehicle, having cooling pipes and having collecting tanks, in which heat exchanger the cooling pipes extend between the collecting tanks, in which heat exchanger the cooling pipes and the collecting tanks are spatially connected to one another, in which heat exchanger the cooling pipes are produced from a strip material with at least one cooling pipe seam, in which heat exchanger the at least one cooling pipe seam forms an inner partition of the cooling pipe, and in which heat exchanger the cooling pipes have an external solder plating on the pipe outer side and the cooling pipes have more than one coating on the pipe inner side, wherein one of the coatings on the pipe inner side is arranged only partially in the region of the at least one cooling pipe seam, as a result of which particularly high demands with regard to a multi-coating layered construction of cooling pipes of the heat exchanger can be met in a cost-effective manner.

Heat exchanger for a motor vehicle, and method for manufacturing a cooling tube of a heat exchanger

The aim of the invention is to provide a fluxing agent for soldering components, which creates one or more specific surface characteristics during the soldering process itself, thus obviating the need for the surface treatment process that is conventionally carried out after the soldering process. To achieve this, nanoparticles are added to a base substance.

Fluxing agent for soldering metal components

A conducting device, such as a corrugated fin, for a heat exchanger, has at least one surface with an increased microscopic roughness. A method increases the microscopic roughness of at least one surface of a conducting device such as a corrugated fin. A heat exchanger, such as an evaporator for an air-conditioning system of a motor vehicle, has tubes through which a medium flows and between which conducting devices are arranged, the conducting devices having a further medium, such as moist air, flowing around them.

Conducting device including a corrugated fin for a heat exchanger

Growing community of inventors

Deizisau, Germany

Matthias Pfitzer