Mahle International Gmbh

Avl List Gmbh

Iveco S.p.a.

Fpt Industrial S.p.a.

M Ahle International Gm Bh

Mahle Amovis Gmbh

Michael Bucher

Michael Hoetger

Christoph Fiala

Hannes Marlok

Mirko Guenther

Falk Schneider

Harald Scherg-Kurmes

Lydia Ziegler

Michael Kreisig

Roland Lochmann

Peter Wieske

Michael Glensvig

Klemens Neunteufl

Michael Hötger

Fabio Cococcetta

Ivan Calaon

Gerald Gradwohl

Gunter Rzychon

Oswald Lackner

Hannes Marlock

Gerd Wierczorek

Florian Fuchs

Jana Mertens

Gerd Wieczorek

Maria Metinger

Mirko GÜNTHER

A method for operating a heat recovery system for the utilization of waste heat of a heat engine of the heat recovery system may include discharging a carrier fluid via the heat engine, feeding the carrier fluid to an evaporator of a cyclic process of the heat recovery system, vaporizing a working fluid of the cyclic process via the evaporator and the waste heat, feeding the working fluid to an expansion engine of the cyclic process after vaporizing the working fluid, determining at least one carrier state variable of the carrier fluid at the evaporator, and setting at least one operating parameter of the heat recovery system based on the at least one determined carrier state variable.

Method for the utilization of waste heat of a heat engine

A method for operating an internal combustion engine having a waste heat utilization device including a waste heat utilization cycle in which a valve mechanism, an evaporator, and an expander are arranged, may include adjusting the valve mechanism between an evaporator position and a bypass position via a control/regulating device as a function of at least one operating parameter of the internal combustion engine. The method may also include calculating at least one of a power and an energy generatable by the waste heat utilization device via the control/regulating device as a function of the at least one operating parameter of the internal combustion engine. The method may further include switching the expander between an active state and an inactive state via the control/regulating device as a function of the at least one of the calculated power and the calculated energy.

Waste heat utilization device

The invention relates to a method for controlling a waste-heat utilization system () for an internal combustion engine () of a vehicle, wherein the waste-heat utilization system () has at least one expander (), which can transmit torque to the internal combustion engine () and which can be bypassed by means of a bypass flow path (), at least one evaporator (), and at least one pump () for an operating medium, and wherein at least the evaporator () is arranged in the region of the exhaust gas system () of the internal combustion engine (). The expander (), which can be operated in several operating modes, has a driving connection to a secondary drive shaft () of the internal combustion engine in at least one operating mode. An operating mode of the waste-heat utilization system () is selected by a control device () on the basis of at least one input variable and the waste-heat utilization system () is operated in said operating mode. The input variable is selected by the control device () from the group consisting of expander rotational speed (n), gear information (GI), coasting information (CI), and pressure (p, p) and temperature (T, T) of the operating medium upstream or downstream of the expander (). A first operating mode () is associated with a warm-up phase of the expander () and a second operating mode () is associated with a normal operating phase of the expander (). In the first operating mode, the bypass flow path () is opened and the expander () is not connected to a secondary drive shaft () of the internal combustion engine (). In the second operating mode, the bypass flow path () is closed and the expander () is connected to the internal combustion engine (). The second operating mode () is selected if the pressure (p) and/or the temperature (T) of the operating medium downstream of the expander () exceeds a defined value.

Method for controlling a waste heat utilization system for an internal combustion engine

An engine assembly may include an internal combustion engine and an expander couplable to the internal combustion engine in a force transmitting manner. The engine assembly may also include a pulley mounted rotatably on a shaft of the expander. The pulley may be coupled to the internal combustion engine in a force-transmitting manner via a belt drive. The engine assembly may further include a first driver plate connected non-rotatably to the pulley and a second driver plate arranged adjacent thereto and connected non-rotatably to the shaft. The engine assembly may additionally include a clutch device including at least one actuating device and a coupling wheel. The coupling wheel may contact the first driver plate and the second driver plate when the clutch device is closed such that the pulley is connected with the shaft of the expander in a driving manner.

Engine assembly

An axial piston machine may include a rotor rotatably mounted in a housing. A plurality of cylinders may be arranged in a ring around the rotor. A plurality of pistons may each be arranged within each of the plurality of cylinders and may be constructed and arranged to selectively translate within the plurality of cylinders. A plurality of inlet openings may be defined in a cylinder head and at least one outlet opening may be defined in the housing. The plurality of cylinders may be in operative communication with the plurality of inlet openings and the at least one outlet opening. An inlet channel may be defined in the cylinder head and may extend to each of the plurality of inlet openings. An outlet channel may be defined in the housing and may be in operative communication with the at least one outlet opening. A bypass channel may be defined in the housing and may extend from the cylinder head into one of the outlet channel or a swashplate space. A bypass valve may be connected to the cylinder head or may be integrated with the cylinder head. The bypass valve may be constructed and arranged to selectively apportion a working medium to the inlet channel and the bypass channel based on a switching position of the bypass valve.

Axial piston machine

A heat recovery device may include a circuit. During operation of the heat recovery device, a working medium may circulate. The circuit may include a conveyor to convey the working medium. An evaporator may be arranged downstream of the conveyor and may evaporate the working medium. An expander may be arranged downstream of the evaporator and may expand the working medium. The expander may have a shaft that may pick up a torque at the expander. A condenser may be arranged downstream of the expander and may condense the working medium. A tank may be connected to the circuit. The tank may define a volume for the working medium. An adjustor may change the volume of the tank for the working medium. A non-return valve may be arranged between the tank and the condenser, and may prevent a flow of the working medium in a direction of the condenser.

Heat recovery device and method

An engine assembly may include an internal combustion engine, an expander coupled to the engine, a pulley rotatably arranged on a shaft of the expander and coupled to the engine, a coupling device including at least one elastic operating element arranged within an operating element accommodation in an axially deformable manner, a drive disk arranged on the shaft between the pulley and the at least one operating element, and a pressure device connected to the operating element accommodation via a fluid line and configured to apply pressure to the operating element accommodation. The at least one operating element may be deformable in an axial direction such that the at least one operating element adjusts the drive disk into force-transferring contact with the pulley when the at least one operating element is deformed by a pressure applied to the operating element accommodation by the pressure device.

An axial piston machine may include a rotor with a shaft. A plurality of cylinders may be arranged in an annular manner about the shaft. A plurality of pistons may each be positioned within each of the plurality of cylinders and may be constructed and arranged to move translationally within the plurality of cylinders. A cylinder head may include a plurality of inlet openings and may be in operative communication with the plurality of cylinders. A sealing washer having a plurality of passage openings may be disposed on the cylinder head so that the plurality of passage openings and the plurality of inlet openings may be flush with one another. A number of the plurality of inlet openings may correspond to a number of the plurality of passage openings. A valve plate may be connected to the shaft in a rotationally fixed manner and may be constructed and arranged to be brought into congruence with the plurality of passage openings of the sealing washer based on a rotary angle. The sealing washer may be disposed between the plurality of inlet openings and the valve plate and may be prestressed against the cylinder head and onto the inlet openings.

A waste-heat recovery system may include a waste-heat recovery circuit in which a working fluid is circulatable and which has a high pressure region and a low pressure region. The system may also include a conveying device configured to drive the working fluid, a steam generator configured to evaporate the working fluid, an expansion machine configured to expand the working fluid via mechanical work, at least one condenser configured to condense the working fluid, a container arranged downstream of the at least one condenser, and a divider arranged in a container interior of the container which may divide the container interior into a first sub-chamber and a second sub-chamber. The second sub-chamber may be Tillable with a coolant, which is introducible into the at least one condenser fluidically separately from the working fluid via a fluid line, such that the working fluid is condensable via thermal interaction with the coolant.

Waste-heat recovery system

A heat recovery apparatus having a circuit that during operation circulates a working medium. The circuit may include an evaporator to evaporate the working medium, an expander arranged downstream of the evaporator to expand the working medium, and a condenser arranged downstream of the expander configured to condense the working medium. The expander may include a shaft to draw a torque at the expander. An injector pump may drive the working medium. The injector pump may include a driving fluid inlet, a suction inlet, and an injector outlet. The driving fluid inlet may be fluidically connected to the circuit between the evaporator and the expander. The suction inlet may be fluidically connected to the circuit between the condenser and the evaporator. The injector outlet may be fluidically connected to the circuit between the suction inlet and the evaporator.

Heat recovery apparatus

An axial piston machine may include a rotor having a shaft rotatably mounted in a housing. A plurality of cylinders may be arranged annularly around the rotor. A plurality of pistons may each be disposed within each of the plurality of cylinders and may be constructed and arranged to selectively translate within each of the plurality of cylinders. Each of the plurality of cylinders may be disposed within a cylinder head and may be in operative communication with an inlet opening defined in the cylinder head and at least one outlet opening defined in the housing. An auxiliary outlet rotary slide valve may be operatively connected to the shaft in a rotationally fixed manner. The auxiliary outlet rotary slide valve may comprises an auxiliary outlet rotary opening constructed and arranged to connect to a vent duct of one of the plurality of cylinders based on an angle of rotation, and may vent the one of the plurality of cylinders. At least a portion of the auxiliary outlet rotary slide valve may comprise a material constructed and arranged to reduce a sliding friction resistance, and wherein the material comprises one of a carbon containing material or a polymer containing material.

A drive system may include an internal combustion engine and an expander operated via a working medium. A force transmission device may be disposed between a crankcase and the expander. A first seal may be disposed between the expander and the force transmission device and/or a second seal may be disposed between the force transmission device and the crankcase. A crankcase ventilation line may lead from the crankcase into an intake pipe of the internal combustion engine. An air mass sensor may be disposed in the intake pipe. An engine control unit may be in communication with the air mass sensor, the expander, and the internal combustion engine and may be configured to detect a power of the internal combustion engine and an air mass flow of the air mass sensor and may switch off the expander if a power suddenly rises with the air mass flow remaining constant.

Drive system with expander shut off upon detection of a leak

An axial piston machine may include a shaft and a housing surrounding at least a portion of the shaft. A cylinder arrangement may be disposed within the housing in a circular manner. The cylinder arrangement may include a plurality of cylinders and a plurality of pistons each extending within each of the plurality of cylinders and may be constructed and arranged to drive the shaft. The plurality of cylinders may each include an expansion volume with an inlet and at least one outlet opening for a working medium. A cylinder head may be provided on the housing and may be constructed and arranged to close the plurality of cylinders of the cylinder arrangement. A cavity may be defined around the shaft in a central region of the cylinder arrangement and may be in operative communication with a plurality of auxiliary outlet openings of the expansion volume of each of the plurality of cylinders via a temporary connection. A cylindrical roller slider may rotate within the cavity in the central region of the cylinder arrangement and may be constructed and arranged to drive the shaft. A temporary connection between the cavity and the expansion volume of each of the plurality of cylinders may be formed by at least one of a channel through the cylindrical roller slider and a recess on an outside surface of the cylindrical roller slider. The recess may extend laterally from a casing of the cylindrical roller slider at a height of the plurality of auxiliary outlet openings in each of the plurality of cylinders and at a distance to the cavity in the central region of the cylinder arrangement.

Growing community of inventors

Berlin, Germany

Michael Bucher