Volkswagen Ag

Man Nutzfahrzeuge Ag

Andreas Herr

Asmus Carstensen

Artur Semke

Thomas Schulenburg

Marcus Dallmann

Thomas Maischik

Christoph Käppner

Andreas Lacroix

Jörg Fritzsche

Jörg Volkmann

Eberhard Jacob

Michael Kaack

Uwe Kammann

André Horn

Hardy Naumann

Bernd Hupfeld

Werner Mueller

Sebastian Käfer

Werner Müller

Holger Lange

Sebastian Kaefer

Stefan Wendenburg

Arne Brömer

Stefan Resch

Martina Gottschling

Jörn Bullert

An axial piston motor having a cylinder housing, in which a plurality of cylinders are formed, and having pistons which are movably guided in the cylinders, wherein the pistons are attached to a swash plate and wherein a flow of a fluid that has entered via an inlet into the axial piston motor is controlled into and out of the cylinders by means of inlet and outlet valves, wherein the inlet and/or outlet valves comprise fluid change openings which are formed in a cylinder head plate and which can be temporarily released and covered by means of a rotary slide, for which purpose the rotary slide forms at least one passage opening.

Axial-piston motor and cyclic process device

A drive unit for a motor vehicle that has a combustion machine having an internal combustion engine () as well as an exhaust gas system via which exhaust gas can be discharged from the internal combustion engine (), and has a cyclic device that can be used to convert the thermal energy contained in the exhaust gas into mechanical work in a clockwise thermodynamic cycle, whereby the cycle comprises a heat transfer from the exhaust gas to a working medium in a first heat exchange device, as a result of which the temperature and/or the pressure of the working medium is increased, comprises an expansion of the working medium in an expansion device () for generating the mechanical work, and comprises a heat transfer from the working medium to a cooling medium in a second heat exchange device. The drive unit is refined in that the first heat exchange device comprises a first heat exchanger () and a second heat exchanger () as well as an intermediate circuit () containing a transfer medium, whereby in the first heat exchanger (), thermal energy is transferred from the exhaust gas to the transfer medium, and in the second heat exchanger (), thermal energy is transferred from the transfer medium to the working medium.

Drive unit for a motor vehicle

A heat exchange device having a first media channel for a first medium and a second media channel for a second medium is further refined in that, in at least one section of the heat exchange device, a third media channel for a transfer medium is arranged between the first media channel and the second media channel, so that the heat transfer from the first medium to the second medium takes place via the transfer medium.

Heat exchange device and drive unit for a motor vehicle

In a device for dosing and transporting dry urea, e.g., for implementing the SCR method in a motor vehicle, the device includes a storage vessel containing the dry urea in the form of pellets, the wall of the storage vessel having an opening to which a transport line is connected on the outer side. The device also includes a compressed air nozzle which is arranged inside the storage vessel at a distance from the opening, is oriented towards the opening, and may be supplied with compressed air, and a portioning element having an upper side oriented towards the inside of the storage vessel and a lower side opposite the wall of the storage vessel. At least one continuous channel having a larger cross section than the dimensions of the pellets connects the upper side and the lower side in order to form at least one receiving element for the pellets.

Device and method for dosing and transporting dry urea, especially during the implementation of the SCR method in motor vehicles

A method is provided for producing ammonia (NH) and introducing the produced ammonia (NH) into an exhaust gas stream as a reduction means for selectively catalytically reducing nitrogen oxides contained in the exhaust gas stream, which is an exhaust stream generated by the combustion process of a motor, a gas turbine, or a burner. The method comprises feeding dry urea from a supply container in a controlled amount to reactor and subjecting the dry urea in the reactor to a sufficiently rapid thermal treatment such that a gas mixture comprising the reaction products of ammonia (NH) and isocyanic acid (HCNO) is created. Also, the method comprises immediately catalytically treating the thus produced gas mixture in the presence of water such that the isocyanic acid (HCNO) resulting from the rapid thermal treatment is converted, via quantitative hydrolysis treatment, into ammonia (NH) and carbon dioxide (CO).

Method and apparatus for producing ammonia (NH3)

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Wolfsburg, Germany

Andreas Herr