Robert Boschgmbh

Michael Baeuerle

Klaus Ries-Mueller

Werner Haeming

Oskar Torno

Iwan Surjadi

Stefan Unland

Steffen Franke

Robert Sloboda

Carsten Kluth

Michael Nau

Axel Heinstein

Guido Porten

Udo Sieber

Martin-Peter Bolz

Robert H Entenmann

Andrea Lohmann

Juergen Sauler

Helmut Schneider

Andreas Blumenstock

Uwe Kassner

Martin Klenk

Andreas Roth

Johannes Meiwes

Rene Schepp

Frank Gottwald

Holger Jessen

Markus Klausner

Matthias Philipp

Alexander Schenck Zu Schweinsberg

Wolfgang Grimm

Reiner Schweinfurth

Stefan Woerz

Ralph Engelberg

Stephan Uhl

Ulrich Rothhaar

Carsten Reisinger

Wolfgang Hilbert

Ingo Immendoerfer

Ralph Glemser

Karin Kienle

Thomas Edelmann

Martin Brandt

Bernhard Vogt

Joerg Mayer

Klaus Schenk

Crina Vlad

Volker Ricken

Holger Knesch

Ralf Diekmann

Robert Torno

Oscar Torno

Stefan Bollig

Sigfrid Hafner

Tadeusz Glazewski

Daniel Haege

Dirk Hoeffken

Maximilian Auracher

Dalton De Paula Cavalcanti

Thomas Fruehschuetz

Petr Stary

Martin Slezak

Michal Beranek

Joel Oudart

A method for protecting an electric machine of a motor vehicle, In the method, a switch-on frequency for the electric machine is ascertained as a function of operating parameters of the motor vehicle stored in a control unit. The switch-on frequency is compared to a predefinable first threshold value. At least one further threshold value is preset. The electric machine is switched on in the event a control variance exceeds the at least one further threshold value. In the event the switch-on frequency exceeds the first predefinable threshold value, the at least one further threshold value is adapted in such a way that the switch-on frequency of the electric machine is limited.

Method for protecting an electric machine of a motor vehicle

A method is disclosed for operating an internal combustion engine which comprises a primary air system for providing fresh air and a secondary air system. The secondary air system is configured to branch off secondary air from the primary air system and blow it into an exhaust gas duct. The secondary air system has a compressor for feeding the secondary air and a secondary air valve for shutting off or enabling the blowing in of secondary air. The method includes (i) activating the compressor while the secondary air valve is kept closed, (ii) determining whether compressor surging is occurring or is directly imminent, (iii) sensing at least one sensor signal if compressor surging is occurring or is directly imminent, and (iv) determining whether there is a leak in the secondary air system, on the basis of the sensed sensor signal.

Method for operating an internal combustion engine with a secondary air system

A method for operating an electric machine of a compressor and/or of a turbine, which includes a rotor situated on a shaft mounted rotatably in a housing and a stator fixed to the housing, the stator including an, in particular, multiphase drive winding, and an activation of the drive winding being suspended at least intermittently in an idling mode. It is provided that the shaft and/or the rotor is/are monitored for a rotary movement, and that, when a standstill or an impending standstill of the shaft and/or of the rotor is detected, the drive winding is activated in such a way that the rotor, at least briefly, is caused to carry out a movement and/or is centered with respect to the stator by magnetic force.

Method for operating an electric machine, electric machine, drive device and compressor and/or turbine

A device and method for regulating a compressor for an internal combustion engine. At least one actual variable is detected that characterizes a property of an air column, which is situated at an outlet of the compressor in an induction tract of an internal combustion engine, the actual variable being compared in a comparison with a comparison value, the comparison value characterizing a limit for the property of the air column, a setpoint variable being determined as a function of the result of the comparison in order to shift the actual variable in the direction or opposite direction of the comparison value, and an actuator for influencing the actual variable being operated as a function of the setpoint variable.

Device and method for regulating a compressor for an internal combustion engine

A supercharger for an internal combustion engine includes a supercharger chamber, a diaphragm, an inlet valve, an outlet valve, an exhaust gas line, and an actuator. The diaphragm is positioned in the supercharger chamber and divides the supercharger chamber into an intake chamber and an exhaust gas chamber. The inlet valve and outlet valve are positioned on the intake chamber. The exhaust gas chamber is connected to the exhaust gas line, and to the actuator. The actuator is electrically actuatable, is connected to the diaphragm, and is configured to change a resonance frequency of the diaphragm.

Supercharger of an internal combustion engine with a diaphragm having an electrical actuator controlled resonant frequency

An exhaust gas turbocharger for a drive device, having a compressor that is capable of being electrically supported or driven by a media gap motor, the media gap motor having a rotor that is operatively connected to a bearing shaft of a compressor impeller of the compressor, and having a stator that surrounds the rotor at least in some regions in the circumferential direction relative to an axis of rotation of the bearing shaft. A power electronics for controlling at least one electrical winding of the stator surrounds the axis of rotation at least in some regions in the circumferential direction, a cooling jacket that stands in touch contact with the stator and/or with the power electronics being provided for cooling the stator and/or the power electronics.

Charger, in particular an exhaust gas turbo charger, for a drive device and corresponding drive device

The invention relates to a method for checking a functionality of a differential pressure measuring unit () in an exhaust gas recirculation system () of a motor vehicle, and a corresponding exhaust gas recirculation system (). In an air intake duct (), a sensor flap () is provided downstream of an air filter () and upstream of an opening () of an exhaust gas recirculation duct (). This sensor flap () is set in two different positions and a value of a pressure drop in the exhaust gas stream is measured for each position as said gas stream flows through an exhaust gas recirculation stream valve () provided in the exhaust gas recirculation duct (). If the measured pressure drop does not significantly change despite the movement of the sensor flap (), it can be assumed that there is a fault in the differential pressure measuring unit (). In particular, it is possible to detect when a hose (), which connects a differential pressure sensor of the differential pressure measuring unit () to a connector () on the exhaust gas recirculation duct () downstream of the exhaust gas recirculation stream valve () has torn, slipped off or become blocked.

Method for checking the functionality of a differential pressure measuring unit of a motor vehicle exhaust gas recirculation system

A turbocharger for a motor vehicle, including a compressor, which has a compressor wheel situated on a rotatably supported shaft, an electric machine being situated in a pipe section of an axial compressor inlet, the electric machine including a rotor situated on the shaft and a stator situated on the pipe section. The stator has multiple webs projecting inward which are distributed over the circumference and extend at least essentially in an axial direction, the webs being used for forming flow channels which extend in an axial direction and are situated at a distance from one another.

Turbocharger including an electric machine

A fluid pump () for a motor vehicle comprising a pump rotor () for pumping a fluid, a shaft () for driving the pump rotor () and a clutch () for the switchable coupling of the shaft () to the pump rotor (). The clutch () is designed to connect the shaft () to the pump rotor () in a positive-locking manner and to separate said shaft from said pump rotor.

Fluid pump comprising a positive-locking clutch for a motor vehicle

A transmission system for an adjusting device, of a waste gate of an exhaust gas turbocharger, including a four bar coupling mechanism, a driver arm operatively connected to a drive via a transmission, an output arm and a coupler, operatively connecting the driver and output arms, the transmission having a driving gear, assigned to the drive, and a driven gear, assigned to the driver arm and interacting with the driving gear having a rolling curve radius, which changes over the circumference, the driven gear having a rolling curve radius running complementary to the former. The rolling curve radii is selected in an angle of rotation range about the extended position of the coupling to form at least in regions a first transmission ratio and outside the angle of rotation range to form at least a second transmission ratio larger than the first ratio. Also described is an exhaust gas turbocharger.

Transmission system and exhaust gas turbocharger

An internal combustion engine has at least one combustion chamber which may be closed by an intake valve, at least one air intake port which leads to the intake valve, and a fuel injection device which in association with the at least one combustion chamber has a first injector and a second injector for the metered injection of fuel into at least one intake port. To achieve significantly improved mixture preparation and combustion of the fuel-air mixture in the combustion chamber, the two injectors are configured such that the first injector injects a widely divergent spray cone having a large cone angle, and the second injector injects an only slightly divergent spray cone having a much smaller cone angle.

Internal combustion engine

A generator unit, in particular for motor vehicles, having at least one generator for producing electrical power and having a multi-stage compressor unit that includes at least two compressors connected in series and downline from which there is a turbine unit having at least one turbine, there being a combustion chamber situated between compressor unit and turbine unit. An injection device is provided for injecting fuel between the compressors.

Generator unit, in particular for motor vehicles

In a magnetic transmission for coupling a valve element to a valve drive, the valve element and the valve drive are located in the same housing, the valve element includes a ring gear composed of ferromagnetic material, the ring gear and, therefore, the valve element are positioned via reluctance forces using a magnetic spindle, and the ring gear is sealed off from the spindle by a magnetically permeable housing partition.

Magnetic transmission

A method for operating an internal combustion engine in which combustion air is supplied to a combustion chamber of the internal combustion engine, which air is compressed with the aid of a pulse supercharger, the pulse supercharger being controlled in such a way that optionally, in a first operating mode, the combustion air is compressed in order to support a compressor of a turbocharger, or in a second operating mode, the combustion air compressed with the aid of the compressor is cooled.

Method for operating an internal combustion engine

In a method for operating an actuator for a wastegate actuating device of an exhaust gas turbocharger, a wastegate situated in an exhaust branch of an internal combustion engine is electrically adjustable with the aid of the actuator, and an exhaust gas quantity flowing through the exhaust gas turbocharger is adjustable as a function of an opening position of the wastegate. The actuator is controlled using an applied electrical power in a closed position of the wastegate to provide a varying closing pressure of the wastegate as a function of a characteristic curve of an exhaust gas counterpressure applied via the wastegate.

Method and device for operating a wastegate actuator for a wastegate

Growing community of inventors

Ditzingen-Heimerdingen, Germany

Michael Baeuerle