Mahle International Gmbh

Mahle Filtersysteme Gmbh

Jörg Dittmann

Matthias Gänswein

Harald Rieger

Bernhard Schwalk

Richard Jaiβle

Holger Peters

Edson Manzato

Frank Metz

Ricardo De Abreu

A cooler having a first component made of at least one of steel, stainless steel, plastic and ceramic. A second component may be made of aluminum, wherein the two components may be connected to each other in a connecting area via a friction stir weld joint.

Composite exhaust gas recirculation cooler

The present invention relates to an exhaust gas cooler (), in particular for an exhaust gas recirculation system of an internal combustion engine, preferably of a motor vehicle, comprising an exhaust gas inlet () which is connected in a communicating manner with an inlet chamber (), an exhaust gas outlet () which is connected in a communicating manner with an outlet chamber (), a plurality of exhaust gas pipes () which are configured as flat pipes, extend parallel to each other through a coolant chamber () and are connected in a communicating manner on one side to the inlet chamber () and on the other side to the outlet chamber (), a coolant inlet () which is connected in a communicating manner to the coolant chamber (), and a coolant outlet () which is connected in a communicating manner to the coolant chamber (). The exhaust gas pipes () have on mutually opposite sides () a plurality of outwardly projecting protrusions () which are spaced apart from each other in the longitudinal direction () of the exhaust gas pipes (). A simplified cooling effect can be achieved if, with in each case two adjacent exhaust gas pipes (), the protrusions () of one exhaust gas pipe () bear in each case directly against the other exhaust gas pipe () at a distance in the longitudinal direction () of the exhaust gas pipes () from the nearest protrusion () of the other exhaust gas pipe ().

Exhaust gas cooler

A method for directly evacuating water that has been separated from the filtered fuel in a fuel filter and has settled in a water collection chamber () of the fuel filter to an evacuation area that lies above the water level, by opening a shut-off valve (), which leads to the exterior of the fuel filter and is connected in a water-conductive manner to the water collection chamber (). Said evacuation takes place under a pressure that is higher in the water collection chamber () in relation to the evacuation area, whereby said pressure differential is created either by the operating pressure within the fuel filter during operation, or by a negative pressure that is applied externally. The method permits the simple evacuation of water form the interior of a fuel filter by a method that is not based on gravity. The inventive method can be implemented in a particularly advantageous manner, using specially configured fuel filters.

Method for evacuating water that has been separated in a fuel filter and a device for carrying out said method

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Stuttgart, Germany

Jörg Dittmann