Daimler Chrysler Ag

Daimler Ag

Jan Gärtner

Frank Obrist

Thomas Meier

Thomas Koch

Roland Cäsar

Jürgen Wertenbach

Jozsef Marton Mercz

Andreas Zygan

Klaus-Dieter Mörgenthaler

Gunnar Rausch

Josef Martin Mercz

Jürgen Schrader

In a method for recovering energy from the heat dissipated by an internal combustion engine and to an internal combustion engine wherein the pressure and temperature of a liquid working medium are increased from a lower process pressure and a first temperature to an upper process pressure at which the working fluid is heated to a second temperature whereby it is converted to a gaseous phase; the working medium is then expanded back to the lower process pressure whereby mechanical power is generated and the working medium is converted back to a liquid phase, the upper process pressure being adjusted in such a way that the working medium is expanded into the wet steam area close to the saturated steam limit.

Method for recovering heat losses of an internal combustion engine

In a motor vehicle with an internal combustion engine providing a hot exhaust gas flow which is used as heat source for a Clausius-Rankine cycle process, wherein a pump is provided in the cycle for pumping, pressurizing and circulating an operating fluid, the pumping operation is controlled by a controller depending on the exhaust gas mass flow through an evaporator and possibly also the exhaust gas temperature to vaporize the operating fluid and expanding the vapor under pressure in an expander while generating energy. The vapor is condensed in a condenser to form a condensate which is again returned to the pump.

Method for recuperating energy from an exhaust gas flow and motor vehicle

In a needle valve () for a high-pressure gas conduit system consisting of two units () which are joined and one of which encloses a stepping motor () and the other includes gas flow passages and a gas flow control bore (), a valve needle () is supported in the housing unit so as to be movable by the stepping motor and extends into the gas flow control bore () in the other housing unit through a guide passage () provided with seals to prevent gas from flowing to the housing unit including the stepping motor () between a region of the guide bore () and a low pressure region of the needle valve () a compensation connection is provided for relief of pressure at the sealing region () of the guide bore (). The needle valve is particularly suitable as an expansion valve in an automotive COair conditioning system.

Needle valve

In a piston for a compressor, the piston comprises a stem by which the piston may be guided in the housing in an axially displaceable manner, and a force introducing section where an outer drive force can be introduced into the piston. The piston head, the piston skirt and the force introducing section are successively arranged in the direction of the piston axis. The piston head, the piston skirt and the force introducing section are produced as a single element of graphite or a synthetic material, and the piston skirt comprises a solid strut structure and a guide section, the cross-sectional area of the strut structure being smaller than the surface of the piston head. The piston consists of a non-organic, non-metallic material having an average thermal expansion of less than 7&#xd7;10/&#xb0; C. in the temperature range of 0&#xb0; C. to 200&#xb0; C.

Piston for a compressor

Growing community of inventors

Sindelfingen, Germany

Jan Gärtner