Zf Friedrichshafen Ag

Thilo Schmidt

Georg Gierer

Christian Popp

Markus Herrmann

Klaus Steinhauser

Peter Schiele

Karlheinz Mayr

Bernd Allgaier

Peter Ziemer

Jorg Arnold

Valentine Herbeth

Alexander Haberstock

Anton Fritzer

Hubert Remmlinger

Markus Moosmann

Armin Haugg

Christoph Margraf

Wolfgang Schmid

Jörg Arnold

Walter Kill

Josef Haupt

Martin Brehmer

Gabor Diosi

Michael Sohler

Stefan Beck

Christian Sibla

Wolfgang Grosspietsch

Tobias Rolser

Rainer Grundler

Peter Tiesler

Georg Mihatsch

Wolfgang Runge

Andreas Schmidt

Hans-Joachim Martin

Ruben Cuppers

Dirk Winkler

Jonas Knör

Valentine Vincent

Thomas Lindner

Wolfgang Kundermann

Gert Bauknecht

Armin Gierling

Thomas Riedisser

Markus Henneken

Matthias List

Robert Ingenbleek

Markus Eisele

Andreas Beisswenger

Gerald Viernekes

Monika Rößner

Stefan Brom

Gerhard Hermann Martin

Christian Schwemer

Mario Hasel

Wolfgang Großpietsch

Monika Rössner

Ulrich Doerr

Jochen Fischer

Maik Wiesner

Walter Frei

Heinrich Zeller

Dietmar Gehring

Dominik Guldenschuh

Tobias Nusser

Christoph Braun

Christoph Köhler

Uwe Rühringer

Jakob Mayer

Michael Miller

Florian Pawlak

Marcel Gutzeit

Werner Fuchs

Ruben Cüppers

Gunter Philipp

Christian Schupp

Christian Hunger

Fabian Schöniger

Ingo Tetzlaff

Robert Schanuel

Ahmed Mouhcine

Adriano Handrich

Hans-Juergen Bader

Manuel Straub

Thomas Raab

Stefan Meschenmoser

An electromagnetic actuator () for an assembly, which has a fluid space configured to be fluidically connected to the actuator when the actuator is installed in the assembly, includes a movable armature in an armature space (). The armature includes a movable armature rod (). The actuator is configured to fill the armature space () with fluid, such as oil, via axial movements of the armature rod that draw fluid from the fluid space into the armature space () through a fluid path when the armature rod is fluidically connected to the fluid space.

Filling an armature space of an actuator

A method for filling an actuator in a gearbox fills the actuator only when the gearbox is in a passive state by virtue of fluid being introduced into an armature space of the actuator by way of axial movements of an armature rod when the actuator has been fluidically connected to a fluid-filled fluid space of the gearbox.

A hydraulic system () for a transmission () of a motor vehicle () includes a pump system () with a first pressure outlet () and a second pressure outlet (), a primary circuit (), a secondary circuit (), and a system pressure valve () that has a system pressure valve slide (). A secondary pump pressure (P) output from the second pressure outlet () of the pump system () is fed to a radial pressure surface () of the system pressure valve slide (), and therefore an axial load based on the secondary pump pressure (P) acts upon the radial pressure surface () of the system pressure valve slide () such that the system pressure valve slide () tends to move counter to a mechanical preload force out of a first switching position into a second switching position.

Hydraulic system for a transmission of a motor vehicle

A vehicle transmission includes a hydraulic circuit and a control unit. The control unit is configured to: obtain () a target pressure specification; convert () the target pressure specification into a target volume flow rate; determine () a valve volume flow rate as a function of the target volume flow rate and as a function of parameters that represent system properties of the hydraulic circuit; determine () a pressure drop at a valve due to flow forces as a function of the valve volume flow rate; determine () a compensated valve output pressure as a function of the valve volume flow rate and the pressure drop; determine () the electric control current as a function of the compensated valve output pressure; and activate a valve with the electric control current.

Method for the open-loop control of an electrically controllable valve in a vehicle transmission

A hybrid module having a damper hub connected to an internal combustion engine, a housing, a clutch, an electric machine which has a rotor and a stator connected to the housing, a torque converter has a converter housing connected to a central hub and a turbine shaft, and an output shaft. The rotor of the electric machine is connected to the central hub or the converter housing. The turbine shaft is connected to the output shaft to be fixed with respect to rotation and the clutch is arranged between the damper hub and the torque converter The central hub is supported at the output shaft via at least one bearing and is supported at the damper hub via at least two bearings and the damper hub is supported at the housing by a bearing.

Bearing unit for a hybrid module

A device for operating a parking lock () of a transmission () includes an engagement spring () for engaging the parking lock (), a hydraulic actuator () for disengaging the parking lock (), an electrohydraulic control unit () for hydraulically actuating the actuator (), and an electronic control unit () for electrically actuating the actuator () and the electrohydraulic control unit (). The actuator () includes a hydraulic piston () operatively connected to the parking lock (), is actuatable by system pressure (P_sys) of the electrohydraulic control unit () via a pressure line () upon disengagement of the parking lock (), and is mechanically interlockable by an interlocking device (). A choke unit () includes an orifice () and a non-return valve () and is installed in the pressure line () downstream from the hydraulic piston ().

Device for operating a parking lock of a motor vehicle transmission

A bridge element () for establishing an electrical connection and at least one mechanical connection between an actuator () and a bridge element () for a transmission control unit of a transmission includes first electrical contacts () and second electrical contacts (), which are connected to the first electrical contacts () with electrical conductors (), and at least first mechanical connecting elements () proximate the first electrical contacts ().

Bridge element for establishing an electrical connection, and arrangement

A hydraulic control unit () for an automatic transmission of a motor vehicle includes a volumetric flow rate control valve (). The hydraulic control unit () is configured for delivering hydraulic fluid to an inlet () of the volumetric flow rate control valve (). An outlet () of the volumetric flow rate control valve () is connected to a torque converter torus of the automatic transmission. In addition, the volumetric flow rate control valve () is configured for directing the hydraulic fluid across an orifice (), so that the pressure of the hydraulic fluid is reduced and a constant flow of hydraulic fluid is feedable to a torque converter torus.

Hydraulic control unit for an automatic transmission of a motor vehicle

A valve system for a hydraulic emergency driving gear function of a hydraulic control unit for a motor vehicle automatic transmission includes a position valve () with a first piston slide () and an electromagnetic pressure regulator () having a decreasing characteristic curve. The first piston slide () is preloaded in a first position. When the first piston slide () is in a second position, the electromagnetic pressure regulator () is configured for connecting a system pressure-carrying line () of the motor vehicle automatic transmission to a first emergency driving gear clutch () of the motor vehicle automatic transmission and to a second emergency driving gear clutch () of the motor vehicle automatic transmission, whereby the first emergency driving gear clutch () and the second emergency driving gear clutch () are actuated, so that an emergency driving gear of the motor vehicle automatic transmission is engaged.

Valve system for a hydraulic emergency travel gear function of an automatic transmission for a motor vehicle

A hydraulic control unit () includes a valve bush (), a valve cover () partially closing the valve bush () on an end face (S), a valve slide () guided in a longitudinal direction (L) within the valve bush (), and a housing part (). The housing part () includes a recess () matching an external contour of the valve bush (). An intermediate plate () is configured to partially cover the valve cover (). A spring () is arranged within the valve bush () and preloads the valve slide () in a starting position. The valve bush () is inserted, together with the valve cover (), the valve slide (), and the spring (), into the recess () of the housing part () and jointly form a hydraulic valve (). The valve bush () forms an inlet (), and the valve cover () forms an outlet ().

A cooling prioritization valve () for a hydraulic system () of a motor vehicle transmission () includes a valve housing (), a valve slide (), an inlet (), an outlet (), and a further outlet (). A secondary system pressure circuit () of the hydraulic system () can be connected to the inlet (), a cooler () can be connected to the outlet () or to the further outlet (), and a suction loading () can be connected to the outlet () or to the further outlet (). In a starting position, the inlet () is not connected either to the outlet () or to the further outlet (). In a first control position, the inlet () is connected to the outlet (). In a second control position, the inlet () is connected to the outlet () and the further outlet ().

Cooling-prioritization valve for a hydraulic system of a motor vehicle transmission

A hydraulic system for a transmission of a motor vehicle, the system having first and second pumps for conveying hydraulic fluid into primary and/or system-pressure circuits so that an intended pressure prevails in the circuits. The system further including liquid retention means preventing a flow of hydraulic fluid conveyed by the second pump from being conducted through the first pump when the first pump is not conveying and the second pump is conveying, and preventing a flow of hydraulic fluid conveyed by the first pump from being conducted through the second pump when the second pump is not conveying and the first pump is conveying. The system additionally including a sailing-mode lubricating valve for controlling, by an open-loop system, a flow rate of hydraulic fluid conveyed by the second pump into the primary and/or secondary system-pressure circuits such that the intended pressure is set in the system-pressure circuits.

An actuation arrangement () including an actuating device for actuating a transmission parking lock (). The actuating device having a piston () movable into an engaged position (E), which engages the transmission parking lock (), and into a disengaged position (A), which disengages the transmission parking lock (). The actuating device further has a cylinder () including a cavity (), in which the piston () is arranged and into which transmission oil is supplied to move the piston (), and a locking unit () configured for selectively fixing the piston (). The actuation arrangement further includes a valve (). When the valve () is in a first valve position, transmission oil is supplied to the transmission shift element () through a first line (), to actuate the transmission shift element (), and into the cavity () through the second line (), to actuate the transmission parking lock ().

Actuation arrangement

A greaser for a transmission includes a shaft () having an axial bore () and a plurality of axially spaced radial bores (). Each of at least one tube () is inserted into a respective one of the axially spaced radial bores () and extends radially inwardly into the axial bore () beyond a circumferential surface () of the axial bore () that is adjacent the respective one of the axially spaced radial bores (). Each of the at least one tube () includes a slot () at a tube end () facing a central axis () of the shaft (). The slot () of each of the at least one tube () extends along a central axis () of the respective tube () into an interior space of the axial bore ().

Lubricating device for a transmission, and transmission comprising said lubricating device

A system for locking and releasing a shifting position of a shifting element that is hydraulically actuatable by an actuating pressure is provided. The shifting element is arranged coaxially with a transmission shaft. The system includes a stop valve. The stop valve is subjectable to a control pressure that is separate from the actuating pressure of the shifting element. The stop valve is arranged radially inside the shifting element in the transmission housing.

Assembly for blocking and enabling a shifting position of a shifting element

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Meckenbeuren, Germany

Thilo Schmidt