Robert Boschgmbh

Rene Schenk

Oliver Kaefer

Joachim Berger

Thorsten Juenemann

Eberhard Schnaibel

Bernd Schumann

Martin Streib

Andreas Blumenstock

Klaus Joos

Thomas Huber

Stefan Tumback

Manfred Hellmann

Klaus Winkler

Erich Junginger

Christian Zimmermann

Johann Riegel

Klaus Schneider

Peter Baeuerle

Bernd Kesch

Juergen Biester

Andreas Seel

Manfred Strohrmann

Kersten Wehmeier

Martin Trunk

Michael Tischer

Karsten Mann

Bernd Hilgenberg

Kaspar Schmoll Genannt Eisenwerth

Bernd Illg

Frank Steuernagel

Mykhaylo Klymenko

Marcus Rosenberger

Stephan Binhack

Boyke Richter

Peter Khatchikian

Detlev Straub

Bjoern Beuter

Wolfgang Schramm

Manuel Schnitzer

Thomas Daub

Dietmar Blessing

Martin Hartz

Sascha Dreschmann

Sasha Dreschmann

Wilhelm Haag

Frank Molwitz

The present invention relates to a voltage converter comprising a primary side which has a full bridge device which is configured for the purpose of receiving a first DC voltage from a voltage source at a first amplitude and to transmit same to a primary coil arranged in the primary side, comprising a control unit which is designed for the purpose of controlling the full bridge device using PWM signals having phases shifted counter to one another, wherein the control unit is configured to detect an asymmetry in the current supplied to the primary coil based on a current profile in the primary coil, wherein the control unit is designed to compensate for a detected asymmetry by adjusting the PWM signals. The present invention further relates to a corresponding method.

Suppression of a DC component in a transformer of a voltage converter

The invention relates to a device and to a method for producing a signal having an adjustable pulse duty factor, in particular a pulse-width-modulated signal. For this purpose, the period duration of the pulse-width-modulated signal can be varied. Thus, the pulse duty factor of the pulse-width-modulated signal can be adapted very accurately to the desired pulse duty factor without great switching complexity by using a simple counter with a fixed clock frequency.

Device and method for providing a signal having an adjustable pulse duty factor

A hybrid drive system for a motor vehicle includes an internal combustion engine and at least one electric motor, each driving wheels of the motor vehicle. The internal combustion engine is coupled to the corresponding wheels via a first multispeed transmission. The electric motor is coupled to the corresponding wheels via a second multispeed transmission.

Hybrid drive system

A method for adapting a separating clutch in a drive train system of a vehicle, the drive train system having an electric machine, an internal combustion engine as well as an automatic transmission having an hydraulic torque converter and a torque-converter lockup clutch, and the separating clutch lying between the electric machine and the internal combustion engine, and the internal combustion engine being started by the electric machine while the electric machine drives the vehicle, having the following steps: in a time interval, the separating clutch is operated in slip operation for cranking up the internal combustion engine, in the time interval an expected rotary speed change of the electric machine is calculated, the rotary speed change expected by calculation is compared to the actually occurring rotary speed change for deviation and the deviation ascertained is used to adapt the separating clutch.

Method for adapting a separating clutch in a drive train system of a vehicle and drive train system

The present invention provides compensation of rapid fluctuations in voltage in a DC-to-DC converter. For this, the primary side of the DC-to-DC converter is monitored by means of capacitive voltage dividers. A voltage fluctuation occurring in the process can be identified early and thereupon the DC-to-DC converter can be controlled correspondingly to counteract this.

Apparatus for regulating an energy system and method for operating an energy system

In a method for leak testing in an automated electrohydraulic clutch system in a motor vehicle, in which an electromechanical actuator controls the clutch travel of a clutch via a hydraulic piping system, in order that a defective system is detected reliably and rapidly, the leak in the clutch system is detected using a pressure measurement in the electromechanical actuator and compared to a characteristic clutch curve.

Method and device for leak testing in an automated electrohydraulic clutch system in a motor vehicle

A method is for controlling a hybrid drive of a vehicle, which includes at least one internal combustion engine and at least one electric machine, having a first clutch situated between the electric machine and the drive train of the vehicle and a second clutch situated between the electric machine and the internal combustion engine. In the method, a predefinable clutch torque is applied to the second clutch for a start of the internal combustion engine by the operating electric machine, the rotational speed of the internal combustion engine is monitored, and the clutch torque is incremented to a higher value if the rotational speed of the internal combustion engine is less than a predefinable threshold value within a predefinable time interval.

Method for controlling a hybrid drive

A drive-train system of a vehicle having at least one internal combustion engine, which may be started using an electric machine able to be coupled thereto via a clutch and controllable via an engine-speed controller. A control value of the engine-speed controller is detected toward the end of at least one startup operation of the internal combustion engine while the clutch is still subject to slip, and a comparison of the control value with a setpoint value is used to determine a value deviation, which is able to be compensated with the aid of a correction value in a renewed startup operation. Furthermore, a corresponding method is also described.

Drive-train system of a vehicle, and method for controlling the operation of a drive-train system of a vehicle

A method for controlling a hybrid drive of a vehicle, which includes at least one internal combustion engine and at least one electric machine, having a first clutch situated between the electric machine and the drive train of the vehicle and a second clutch situated between the electric machine and the internal combustion engine. Performance parameters of the hybrid drive are controlled as a function of the driver's intent.

To permit particularly easy and flexible configuration of a computer program including at least one functional unit, a method is provided which includes the following steps: creation of at least one implementation-independent configuration data file and/or alteration of information filed in the at least one implementation-independent configuration data file; automatic set-up and/or automatic update of configuration data, stored in a configuration data container, as a function of the information filed in the at least one implementation-independent configuration data file; automatic generation of at least one implementation-dependent configuration data file as a function of the configuration data stored in the configuration data container; and automatic configuration of the at least one functional unit as a function of information filed in the at least one implementation-dependent configuration data file.

Method for configuring a computer program

A method for operating a hybrid drive system, in particular of a motor vehicle, having at least one electric machine and one internal combustion engine, a disconnecting clutch being provided between the electric machine and the internal combustion engine and a torque converter having a turbine wheel being provided between the electric machine and a hybrid drive output, the disconnecting clutch being engaged for starting the internal combustion engine. It is provided that, as a function of the rotational speed of the turbine wheel of the torque converter, a rotational speed is predefined for the electric machine such that no sudden torque change occurs at the hybrid drive output when the internal combustion engine is started.

Method for operating a hybrid drive system having a torque converter

A method for setting operating states of an internal combustion engine, in particular an internal combustion engine of a hybrid drive. In addition to the internal combustion engine, the hybrid drive includes at least one electric drive, a hybrid coordinator and a control unit assigned to the internal combustion engine in which functions are implemented. The functions request operating states favorable to their running ability from the hybrid coordinator which performs a commensurate modification of the distribution of power between the internal combustion engine and the at least one electric drive.

Defined internal combustion engine operation in vehicles having a hybrid drive

For achieving a highest possible measuring accuracy of a circuit for measuring the internal resistance of an exhaust-gas sensor, a method and a circuit for measuring the internal resistance R() of an electrochemical cell () are provided for determining the temperature of an exhaust-gas sensor, especially of a motor vehicle. The circuit is provided with the objective to improve the control to a constant temperature to therefore also improve the performance of the exhaust-gas sensor. A measurement current I_Mess () is applied to the internal resistance R() of the electrochemical cell () and a resulting first voltage is detected. A switchover to a reference resistor Rtakes place from time to time or at regular time intervals. With a switchover to the reference resistor R, the resulting second voltage is stored and thereafter is applied as a reference value for the measurement of the internal resistance R(). The switchover () to the reference resistor Rtakes place, for example, via force/sense lines.

Determining the temperature of an exhaust gas sensor by means of calibrated internal resistance measurement

A method and a device for controlling an internal combustion engine. A temperature variable and a pressure variable are detected by sensors. On the basis of at least the temperature variable and the pressure variable, a first quantity is determined that characterizes the air quantity, which is supplied to the internal combustion engine. A further sensor detects a second quantity that characterizes the air quantity, which is supplied to the internal combustion engine. The second quantity is adapted by the first quantity. Furthermore, the first quantity is used as a substitute value for the second quantity.

Method and device for controlling an internal combustion engine

The invention is directed to a control of an air/fuel ratio during operation of an internal combustion engine having a catalytic converter and an NOx sensor mounted behind the catalytic converter as seen in flow direction. The engine is operated alternately in a first phase with a mixture which is deficient in fuel compared to the stoichiometric mixture composition and, in a second phase, with a stoichiometric or rich mixture composition. The triggering of the change between the two phases is influenced by the signal of the NOx sensor.

Method and arrangement for operating an internal combustion engine in combination with an NOx storage catalytic converter and an NOx sensor

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Tamm, Germany

Rene Schenk