Zf Friedrichshafen Ag

Matthias Winkel

Bertram Wengert

Marcus Gansohr

Christoph Rüchardt

Klaus Schweiger

Andreas Wolf

Otto Ebner

Christoph R&uuml;chardt

Andreas Schwenger

Thomas Knoblauch

J&uuml;rgen M&uuml;ller

Roland Mair

Kim Führer

Martin Ruider

Reiner Kneer

Stephan Demmerer

Thomas Jäger

Werner Wolfgang

Rupert Kramer

Gerald Karch

Johannes Winkler

Ramon Cordt

Horst Aepker

Fernando Jesus Ramos Zuniga

Klaus Ventzke

Werner Herbert Brandwitte

Marcel Müller

Patrick Isele

An electric drive axle of a vehicle with a parking lock and with at least one electric drive with a drive gear of a drive shaft. The drive gear is coupled via at least one intermediate gear of an intermediate shaft to an output gear of a differential gear unit for driving at least one output shaft. For decoupling the electric drive, at least one claw shift element is associated with the drive shaft and/or with the intermediate shaft in such a way that the claw shift element is arranged upstream of the parking lock in power flow direction from electric drive to differential gear unit.

Electric drive axle of a vehicle

The disclosure relates to a claw coupling for interlockingly connecting a first rotatable component to a second rotatable component, wherein a sliding sleeve is non-rotatably and axially slidably arranged on the first rotatable component and a coupling body is non-rotatably arranged on the second rotatable component, the sliding sleeve being axially movable for interlocking connection to the coupling body in order to connect the first component to the second component, at least one spring-loaded shifting ring being movably mounted, non-rotatably and axially relative to the sliding sleeve, on the sliding sleeve, and a damping chamber, formed in dependence on the relative motion, is provided in order to delay the axial motion. The disclosure further relates to an electrical drive axle of a vehicle having at least the claw coupling. In addition, the disclosure relates to a method for interlockingly connecting the first rotatable component to the second rotatable component via a claw coupling.

Claw coupling for interlockingly connecting a first rotatable component to a second rotatable component

A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and deactivated depending on a return condition. The method comprises the step of (a) determining the return condition by a change in operating state, and (b) deactivating the hold gear function if a temporary operating state, for which the hold function is requested, ends and a change takes place between one of uphill driving and downhill driving and between driving one of up and down a hill and driving on a same plane.

Method for controlling an automatic transmission of a motor vehicle

A method for controlling and/or regulating an automatic transmission of a vehicle, depending on the driving route slope in which a winding mountain pass road detection is carried out, depending upon a topography of the driving route, in such a way that a time for either setting or resetting winding mountain pass road detection is determined.

Method for control and/or regulation of a motor vehicle automatic transmission according to driving route slope

A method of controlling an automatic transmission of a vehicle in which a hold gear function is activated by a driver request and is deactivated depending on a return condition. To allow an effective, safe to operate, and comfortable use, the return condition depends on one of the following criteria or a useful combination of the same: a flexible time span, consideration of the vehicle stand still time; a rotational speed of the vehicle engine, or one or several parameters which correlate with the engine rotational speed, a new, the same, or a different drive request by the driver, a change in the operating condition of the vehicle, and a plausibility check occurring during the startup procedure.

A method for controlling and/or regulating a multi-step automatic transmission of a vehicle in which an upshift is prevented if a power limit, of the motor of the vehicle, is reached such that, when a driving situation in which the power limit of the motor is reached and recognized, the motor speed (n) is set at a predetermined limit value (n). In addition, a system for implementing the method according to the invention is also proposed.

Method and system for controlling and/or regulating a multi-step automatic gearbox of a vehicle

A method of controlling an automatic transmission of a motor vehicle that is situated in the force flow between a drive motor and an axle drive of a drive axle or a transfer box in which the current road inclination (&#x3b1;) is determined. To improve the shifting behavior of the transmission, during a transition between driving on a downhill stretch () and on level ground (), after driving on the downhill stretch () and/or after the transition to a thrust operation, a recognition function for determining a downhill run-out () is initiated and, when the downhill run-out () is recognized, a shift to a higher gear during a thrust operation, i.e., a thrust upshift, is carried out before driving onto level ground () and/or before the transition to the traction operation.

Method for controlling an automatic multi-step shift transmission

A method for the operation of an automatic transmission in a motor vehicle. The downshifting of the transmission takes advantage of a braking action of a driving motor connected to the automatic transmission through a clutch, are terminated by the closing of a clutch during a compression phase lasting until the achievement of a predetermined threshold speed. For the improvement of the immediacy of the vehicle drive after the termination of the compression phase, the invention provides that at speeds less than the threshold speed, downshifting is carried out and is terminated with an open clutch.

Method for operating an automatic gearbox on a motor vehicle

A method is proposed for determining a clutch application point in a transmission of a vehicle having a spring-actuated clutch system in which the clutch application point is adapted according to at least one adequate regulated quantity of the clutch system.

Method for determining the clutch application point

A device for evaluating vehicle, driving and operating parameters of a vehicle, in order to adjust the gear ratio of a transmission according to predetermined algorithms, parameters, or characteristic diagrams, selects anew the gear to be adjusted and adjusts the same by way of an evaluation in dependence upon criteria that are specific to the transmission.

Device for evaluating vehicle, driving and operating parameters

A known device for increasing the functional reliability for a hydraulic circuit of a hydraulic clutch having a pressure reservoir () and a release cylinder () which comprises a primary piston () and a secondary piston (). A compensation volume is developed in the sense that when the vehicle is at a standstill and the parking brake released, an unintentional release of the clutch is prevented. A pressure-monitoring/pressure-supply device () is used for determining a reference operating pressure and establishes a static pressure which, in case of any system error, only allows displacement of the secondary piston () such that the contact pressure of the clutch discs, against one another, is still sufficient to maintain the vehicle at a standstill.

Device for increasing the functional reliability of a hydraulic circuit of a hydraulically operable clutch

A method and a device with which disturbing vibrations are diminished at least in the height of their amplitude. A control and regulating device () and suitable sensors () activate a device () when previously established limiting values are exceeded with regard to procedure, with which components of the motor vehicle are influenced such that the disturbing vibrations are damped or compensated.

Method and device for actively reducing clutch grabbings in a motor vehicle

A method for clutch actuation at low temperatures for a motor vehicle having a hydraulically actuatable clutch, below a predetermined temperature a situation-dependent pre-opening of the clutch is executed when a braking is probable.

Method for actuating a clutch at low temperatures

An operating time is determined by an approximation method within the scope of the method for determining the actual operating time of a hydraulic, electrohydraulic or electric component of a motor vehicle or of a working machine within a reference time or a monitoring period.

Method for calculating the operating time of hydraulic components

The method for determining the mass of a vehicle comprises at least two measurements ( ) offset in time within a measuring period by which are determined respectively at least one traction variable ( ) and at least one movement variable ( ) of the vehicle, one of the two measurements ( ) being effected during a traction-free phase and the other of the two measurements ( ) during a traction phase. According to the invention, it is proposed that each of the two measurements comprises one data collection period ( ) the duration of which is longer than a minimum duration, that the traction variable corresponds to the timed integral of the traction and the movement variable to the change of speed of the vehicle.

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Weingarten, Germany

Matthias Winkel