Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .kg

Jens Martin

Alexander Schweizer

Matthias Ehrlich

Martin Fuss

Frank Stengel

Martin Zimmermann

Joachim Hirt

Behzad Nazari

Thomas Jäger

Markus Baehr

Mario Jung

Ekkehard Reibold

Matthias Panzer

Felix Dreher

Thomas Eggert

Martin Zimmerman

Joerg Metzger

Martin Fuß

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 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 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 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

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

A method for the advance determination of an overload of an automatically actuated clutch of a vehicle during a slippage phase and to prevent the overload. The method determines the energy introduced into the clutch during a predetermined first time span of the slippage phase and/or acquires the current temperature of the clutch and, on the basis of the anticipated second time span of the slippage phase, determines the anticipated energy introduction into the clutch and/or the anticipated clutch temperature and, as a function of the anticipated energy introduction and/or the anticipated clutch temperature, takes measures to prevent the overload.

Method for the protection of an automatically actuated clutch of a vehicle against overload

The invention relates to a parallel shift transmission having a drive unit and two partial transmissions, each connectable to the drive unit via a friction clutch and each having a plurality of gear ratio steps.

Parallel shift transmission and method for controlling it

The invention relates to a method of compensating for the influence of changes of speed of a rotary component of an adjustable clutch upon the control torque characteristic curve of the clutch in the power train of a motor vehicle wherein the clutch operates between the rotary output element of the engine or another prime mover and a rotary input element of a change-speed transmission. The method includes the steps of monitoring the rotational speed of the clutch and varying the required positions of a mobile adjusting member for the clutch as a function of changes of the monitored rotational speed. The invention also relates to the power train wherein the influence of changes of rotational speed of the aforesaid component upon the characteristic curve can be varied in accordance with the novel method.

Method of and apparatus for compensating for the influence of changes of rotational speed upon the characteristic curve of a clutch

A method of and an arrangement for preventing a shift of the reference position of a clutch which is operated by an actuator and is installed in the power train of a motor vehicle. Such shift of reference position can be caused in response to axial displacements between the input and output shafts of the clutch. The method includes the steps of routinely ascertaining the reference position, memorizing and thus actualizing the information pertaining to the ascertained reference position, ascertaining an operational parameter which is the cause of axial displacements between the input and output shafts of the clutch, and altering the routine determination and the memorizing of the reference position when the operational parameter exceeds a predetermined threshold value.

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Sinzheim-Kartung, Germany

Jens Martin