Daimler-benz Ag

Daimlerchrylser Ag

Hans-Peter Holzt

Bernd Krutzsch

Walter Boegner

Michel Weibel

Otto Bernauer

Stefan Renfftlen

Josef G&uuml;nther

G&uuml;nter Wenninger

Christof Sch&ouml;n

Hermann Lenz

Dirk Voightl&auml;nder

A method for operating an exhaust-gas cleaning system having an NO adsorption accumulator and an SO trap, includes, in normal operating phases, feeding the exhaust gas to be cleaned first via the SO trap and then via the NO adsorption accumulator. The normal operating phases are from time to time interrupted by desulphurization phases for desulphurizing the SO trap. Means are provided for controlling the direction of flow of the exhaust stream so that it optionally passes firstly via the SO trap and then via the NO adsorption accumulator, or firstly via the NO adsorption accumulator and then via the SO trap, so that during the desulphurization phases the exhaust gas can be passed firstly via the NO adsorption accumulator and then via the SO trap.

Exhaust-gas cleaning system with nitrogen oxide accumulator catalyst and sulphur oxide trap and operating method therefor

A process for cooling a passenger compartment of a vehicle equipped with a hydrogen-consuming engine by mechanical refrigeration involves compressing a gaseous coolant, condensing the resulting compressed and heated gaseous coolant with heat removal to liquefy the coolant, and evaporating the liquefied coolant under the action of a pressure relief valve so that the cold generated during the pressure relief is used to cool the passenger compartment. This process is improved by removing additional heat from the compressed coolant by passing the coolant through a metal hydride cooler.

Process for cooling the passenger compartments of vehicles with

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Esslingen, Germany

Hans-Peter Holzt