Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .kg

Other

Alexander Schweizer

Martin Zimmermann

Matthias Ehrlich

Martin Fuss

Jens Martin

Frank Stengel

Dietmar Lang

Reinhard Berger

Joachim Hirt

Behzad Nazari

Martin Vornehm

Burkhard Pollak

Klaus Küpper

Jürgen Benz

Lidvar Budal

Brad Shellhammer

Jeremy Whitmer

Ralf Enderlin

Thomas J&auml;ger

Christian Rieger

Klaus Kuepper

Klaus K&uuml;pper

J&uuml;rgen Eich

Thomas Jäger

Gunter Hirt

Markus Baehr

Mario Jung

Olaf Werner

Heiko Dell

Marian Preisner

Boris Serebrennikov

Jürgen Eich

Bjoern Stehle

Michael Gallion

Felix Dreher

Matthias Panzer

Juergen Benz

Johannes Moosheimer

Jörg Metzger

Christoph Lindenschmidt

Frank Bast

Gerald Kuestler

Wolfgang Niessen

Florian Strack

Martin Zimmerman

Inho Song

Martin Fuß

Gerd Jäggle

In a clutch which is impelled by an actuator into the closed position and which automatically moves into the open position by an opening spring, the movement of the clutch into the open position is monitored and any malfunction is displayed.

Process and device for monitoring the operation of a clutch moved by an actuator into the closed position and automatically moving into the open position

A process for controlling a drive train with an internal combustion engine, a transmission and an automatically actuated brake system. In the event of a defect of the transmission, retardation is effected by means of the automatically actuated brake system in order to avoid impermissibly high speeds in the drive train.

Process of controlling a drive train of a motor vehicle

A process and device for controlling a motor vehicle with an initialization device () for startup and a clutch actuated by means of a clutch actuator set () between a drive unit and a gear with a control device () by means of which at least one control of the clutch actuator set () and an acquisition of measurement data of a sensor () takes place for the purpose of determining the position of the clutch, characterized in that to verify the state 'clutch open' upon startup, a positioning of the clutch actuator set () that has been set and stored before or during shutdown is compared to a positioning that was acquired during a predetermined movement course of the clutch actuator set () after startup by means of a distance measurement, which takes place at least in a segment of that movement course, whereby the state 'clutch open' is recognized, in particular, when the magnitude of the comparison is within a predetermined tolerance range. By means of the invention one can further reduce the probability of the setting into motion of a motor vehicle after startup, which is critical in terms of safety.

Starter release

A method for preventing spinning of at least one drive wheel in a motor vehicle that has a dual clutch transmission, including the process steps of: a vehicle placed in a first gear unit of the dual clutch transmission; placement of a higher gear for the vehicle in a second gear unit of the dual clutch transmission; detecting whether the at least one drive wheel is spinning; disengaging the clutch that is assigned to the first gear unit, depending on whether spinning was detected; and engaging the clutch that is assigned to the second gear unit, depending on whether spinning was detected.

Method for preventing drive wheels from spinning

This invention relates to a method for controlling a motor vehicle drivetrain system which has a drivetrain as well as a combustion engine for driving this drivetrain and an electronic engine control unit as well as an electronic transmission control unit, whereby, if the electronic transmission control unit fails or when the electronic engine control unit loses communication with the electronic transmission control unit, the permissible engine torque of the combustion engine is limited, as well as a safety system for a motor vehicle by means of which the method is controlled, as well as a motor vehicle with such a safety system.

Method for controlling a motor vehicle drivetrain system

A method for controlling operation of a parallel transmission comprising two partial transmissions that act upon a common drive shaft and can be coupled to a drive shaft via one respective clutch. The gear ratio of the parallel transmission can be changed from the gear that is engaged in one partial transmission to the gear that is engaged in the other partial transmission without interrupting traction when the parallel transmission functions correctly by opening the clutch of one partial transmission and simultaneously closing the clutch of the other partial transmission. When a malfunction is detected in the actuator of at least one of the clutches, the open clutch can be closed only if at least one of the following conditions is met: the previously closed clutch is open; or, no gear is engaged in the partial transmission allocated to the previously closed clutch.

Method and device for controlling the operation of a parallel shifting transmission

A process and device for the currentless referencing of a clutch position in non self-locking clutch actuating systems which are switched without current for a first predetermined, passive period of time or until an actuator standstill occurs, in order to verify a clutch reference position, then the clutch position achieved is determined by first measurement and current is supplied to the clutch actuating system for a predetermined, active period of time, the clutch actuating system being then switched again without current for another predetermined, passive period of time or until an actuator standstill occurs, the clutch position being determined by another measurement; finally the measured clutch position is checked to determine whether it can be verified as a new clutch reference position.

Clutch reference position

To improve the safety of automated gearboxes, it is proposed that terminal positions of internal gearshift members and external actuation members be so defined separately from each other that one can recognize whether the engagement of a speed is accompanied by the attainment of a terminal position of an internal gearshift member or an external actuation member. Error analysis is possible in this way. For dual clutch gears, it is additionally proposed that one can, at least in gearshift operations that are critical in terms of safety, disengage on speed of a subgear in a separate procedure, before a new speed of this subgear can be engaged.

Method for error recognition and error avoidance when switching an automated gearbox as well as an automated gearbox

A device for controlling an electrically-operated holding magnet of a parking lock of a motor vehicle transmission in which a holding magnet supplied with power via a transmission control resettable to a basic setting holds the parking lock in the disengaged state, an apparatus for bridging a reset of the transmission control that maintains the power supply of the holding magnet during the reset being provided.

Device and method for controlling a parking lock holding magnet

A method for referencing an incremental travel sensor in an electronically controlled actuation device of a clutch in the drive train of a traveling vehicle, the actuation device containing a memory in which a characteristic curve is stored that indicates the clutch torque as a function of the position of an actuation element, the method comprising the following steps: determining whether the clutch is slipping beyond a given threshold; if so, determining the current clutch torque; and determining the current position of the actuation element based on the current clutch torque and the characteristic curve. Additional methods are specified that facilitate a referencing according to requirements.

Method and device for referencing an incremental travel sensor in an electronically controlled actuation device of a clutch

A method for operating a drive mechanism comprising bringing a mobile element into a predetermined reference position with the help of an engine and setting an absolute position signal to a reference value allocated to a reference position; changing the position of the mobile element with the help of the engine and creating an incremental position measurement signal, depending on the change in position, for the mobile element; controlling the incremental position measurement signal and following the absolute position signal when a change in the incremental position measurement signal occurs; repositioning the mobile element in the reference position with assistance of the engine and determining the position value indicated by the absolute position signal in the reference position; determining a difference value from the position value and the reference value and saving the difference value in a data storage; and, repeating steps b) through e) are performed at least once.

Method and device for operating a drive mechanism

The invention relates to a method and device for securely and comfortably operating a drive train of a motor vehicle, especially for operating a drive train with several clutches.

Method and system for controlling at least one actuator in the drive train of a motor vehicle

A system for ensuring the ability to start an internal combustion engine contained within a drive train of a vehicle includes, in addition to an actuation device, a torque transmission device contained in the drive train between the internal combustion engine and driven vehicle wheels, an enabling device that is operable by a person operating the vehicle and by means of which the operability of the starter is enabled for starting the internal combustion engine when the torque transmission between the internal combustion engine and the driven wheels of the vehicle is interrupted.

System for ensuring the ability to start an internal combustion engine contained within a drive train

Methods and devices for actuating a parking brake in a gearbox which is actuated in an automated manner, whereby gear changes are carried out using at least one electrically driven actuator, gear positions can be selected by using a selector device, and the parking brake can be activated by using the selector device when the vehicle is stationary or moving slowly. A vehicle provided with an additional gearbox. An ignition key can only be removed, when the gearbox is in a P state and the additional gearbox is not in the N state. A further method and device, whereby the additional gearbox can only be shifted in the N state when the gearbox is not in the P state. Further methods and a device in which automated manual gearboxes, especially parallel gearboxes, are controlled in such a way that the vehicle can be safely parked.

Method and device for operating especially an automatic or automated gearbox comprising a parking brake and a runaway locking mechanism

A method for controlling gear-shifting processes of a powershift gearbox which can be coupled to a drive motor and has gear steps including two friction clutches and a plurality of clutches, and at least one gearbox actuator for actuating the gear steps. The method includes the following steps: the torque of the drive motor is received by the new friction clutch associated with the new gear step to be engaged; before the disengagement of the old gear step and before or during the torque reception, a pre-determined pre-tensioning force is applied to the clutch of the old gear step by the gearbox actuator; and the old gear step is disengaged when the motor torque and the clutch torque are balanced.

Method for controlling gear-shifting processes of a powershift gearbox and corresponding powershift gearbox

Growing community of inventors

Buehl, Germany

Alexander Schweizer