Abstract: An exhaust gas heat exchanger including connection points for the exhaust gas flow, for connecting the exhaust gas heat exchanger to an exhaust gas supply line for supplying a hot exhaust gas and an exhaust gas withdrawal line for withdrawing the exhaust gas flow cooled in the exhaust gas heat exchanger. The exhaust gas flow flows through the exhaust gas heat exchanger in a bundle of exhaust gas guiding pipes in a flow direction. The exhaust gas heat exchanger is provided with at least one coolant supply connection and at least one coolant withdrawal connection. Coolant is guided in a coolant channel in the exhaust gas heat exchanger, inside which it flows around the bundle of exhaust gas guiding pipes. The coolant channel includes at least two regions which differ in terms of the flow direction of the exhaust gas flow by divergent flow directions of the coolant.

Abstract: An exhaust gas heat exchanger including connection points for the exhaust gas flow, for connecting the exhaust gas heat exchanger to an exhaust gas supply line for supplying a hot exhaust gas and an exhaust gas withdrawal line for withdrawing the exhaust gas flow cooled in the exhaust gas heat exchanger. The exhaust gas flow flows through the exhaust gas heat exchanger in a bundle of exhaust gas guiding pipes in a flow direction. The exhaust gas heat exchanger is provided with at least one coolant supply connection and at least one coolant withdrawal connection. Coolant is guided in a coolant channel in the exhaust gas heat exchanger, inside which it flows around the bundle of exhaust gas guiding pipes. The coolant channel includes at least two regions which differ in terms of the flow direction of the exhaust gas flow by divergent flow directions of the coolant.

Abstract: An exhaust gas heat exchanger comprises connection points for the exhaust gas flow, for connecting the exhaust gas heat exchanger to an exhaust gas supply line for supplying a hot exhaust gas and an exhaust gas withdrawal line for withdrawing the exhaust gas flow cooled in the exhaust gas heat exchanger. The exhaust gas flow flows through the exhaust gas heat exchanger in a bundle of exhaust gas guiding pipes in a flow direction. The exhaust gas heat exchanger is provided with at least one coolant supply connection and at least one coolant withdrawal connection. Coolant is guided in a coolant channel in the exhaust gas heat exchanger, inside which it flows around the bundle of exhaust gas guiding pipes. The coolant channel comprises at least two regions which differ in terms of the flow direction of the exhaust gas flow by divergent flow directions of the coolant.

Abstract: 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.

Abstract: The invention relates to a valve, especially a rotary piston valve (1), for controlling the temperature and quantity of the returned exhaust gas in internal combustion engines. Said valve comprises a valve housing (2) and a control element (3) disposed therein which interacts with a valve face (14) configured in the valve housings (2), the control element (3) having a conical surface area (10).

Abstract: 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.

Abstract: A switchable exhaust gas heat exchanger includes an exhaust gas feed line and an exhaust gas discharge for an exhaust gas stream; a first exhaust gas passage and a second exhaust gas passage; a switching valve configured to switch the exhaust gas stream between the first and second exhaust gas passages; and a heat exchanger through which a coolant flows which is arranged in the first exhaust gas passage. The second exhaust gas passage routes the exhaust gas stream past the heat exchanger to the exhaust gas discharge. The switching valve is configured to be switched as a function of the temperature of the coolant and is a proportional control valve. A switching threshold and a switching limit of the coolant determine flow of the exhaust gas stream through the first and second exhaust gas passages.

Abstract: 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.

Abstract: In a method for recovering energy from the heat dissipated by 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 and a second temperature by a pump unit; the working medium is heated from the second temperature to a third temperature by transferring heat from a hot medium containing heat dissipated by the internal combustion engine to the working medium, which is thereby converted from a liquid phase to a gaseous phase; the working medium is then expanded to the lower process pressure whereby mechanical power is generated and the working medium is converted from a gaseous phase to a liquid phase and transferred back to the pump unit, the upper process pressure is adjusted in such a way that the working medium is expanded at least approximately to a predetermined saturated steam limit and to an internal combustion engine for carrying out the method.

Abstract: The invention relates to switchable waste gas exchangers which can are arranged and used, in particular, in exhaust gas recirculation lines in internal combustion engines, especially in motor vehicles.

Abstract: A switchable waste gas heat exchanger which can be arranged and used in exhaust gas recirculation lines in internal combustion engines, such as in motor vehicles.

Abstract: The invention relates to a valve, especially a rotary piston valve (1), for controlling the temperature and quantity of the returned exhaust gas in internal combustion engines. Said valve comprises a valve housing (2) and a control element (3) disposed therein which interacts with a valve face (140 configured in the valve housings (2), the control element (3) having a conical surface area (10).

Abstract: The invention relates to exhaust gas heat exchangers, as they are generally known, and to a sealing device which is especially suitable for using in exhaust gas heat exchangers. The inventive exhaust gas heat exchanger comprises connection points for the exhaust gas flow, for connecting the exhaust gas heat exchanger both to an exhaust gas supply line for supplying a hot exhaust gas and an exhaust gas withdrawal line for withdrawing the exhaust gas flow cooled in the exhaust gas heat exchanger. The exhaust gas flow flows through the exhaust gas heat exchanger in a bundle of exhaust gas guiding pipes in a flow direction. A coolant also flows through the exhaust gas heat exchanger, in a coolant flow. To this end, the exhaust gas heat exchanger is provided with at least one coolant supply connection and at least one coolant withdrawal connection. The coolant is guided in a coolant channel in the exhaust gas heat exchanger, inside which it flows around the bundle of exhaust gas guiding pipes.

Abstract: The invention relates to switchable waste gas exchangers which can are arranged and used, in particular, in exhaust gas recirculation lines in internal combustion engines, especially in motor vehicles.