Robert Boschgmbh

Nikola Corporation

Jorg Heyse

Martin Maier

Detlef Nowak

Kevin M Lynk

Jesse Michael Schneider

Werner Belschner

Frank Schatz

Christian Preussner

Norbert Belzner

Gunter Dantes

Markus Remlinger

Ferdinand Reiter

Norbert Keim

Guenter Dantes

Gottfried Flik

Stefan Arndt

Heinz Fuchs

Gilbert Moersch

Volker Holzgrefe

Stefan Lauter

Nikolaus Simon

Anwar Abidin

Beate Ader

Michael Klaski

Klaus-Henning Krohn

Arpad Imre

Edwin Liebemann

Mathias Thomas

Jurgen Buchholz

Jutta Straetz

Peter Eckert

Petra Heinbuck

Klaus Wirth

Christof Dennerlein

The invention relates to a cooling system () for fuel cell stacks (), comprising a first cooling module () and a second cooling module (). The first cooling module () comprises a fuel cell stack (), a supply line connection () for connecting a supply line () for supplying coolant to the fuel cell stack (), a discharge line connection () for connecting a discharge line () for discharging coolant from the fuel cell stack (), and a venting line connection () for connecting a venting line ().

Cooling system for fuel cell stacks

The invention relates to a method for operating a fuel cell system () using a first operating mode, in which, when all of the fuel cell stacks () are inactive, one fuel cell stack () is pre-heated using a coolant that is pre-heated by means of an electric heater () while bypassing all cooler circuits () of the active coolant circuits () via bypass lines () and the one pre-heated fuel cell stack () is activated in order to pre-heat an additional fuel cell stack () of the fuel cell system. Other operating modes for operating a fuel cell system are disclosed in additional embodiments.

Method for operating a fuel cell system for a motor vehicle

Atomizing disc and fuel injection valve having an atomizing disc

Perforated disc and valve comprising the same

A perforated spray disk, particularly suitable for use in injection valves of fuel injection systems of internal combustion engines. The spray disk has at least one conical spray opening which expands in the direction of flow.

Perforated valve spray disk

Electromagnetically operable valve

Nozzle plate, particularly for injection valves and processes for

Atomizing sieve and fuel injection valve having an atomizing sieve

A method of making a conical spray opening for a perforated valve spray disk by electrical discharge machining. During electrical discharg machining by an electrode, particles are removed by flushing in a direction opposite the direction of electrical discharge machining and counterflushing by a second dielectric after the opening has been created in a direction opposite from the electrical discharge machining, resulting in the opening having a conical shape.

Method for producing perforated valve spray disk

Growing community of inventors

Besigheim, Germany

Jorg Heyse