Zf Friedrichshafen Ag

Volkswagen Ag

Ulrich Mair

Detlef Baasch

Thomas Rosemeier

Christoph Pelchen

Stephan Pollmeyer

Martin Munster

Gerhard Gumpoltsberger

Stefan Wallner

Julian King

Jens Heimann

Barbara Schmohl

Martin Münster

Klaus Kruber

Uwe Griesmeier

Joachim Spratte

Notker Amann

Daniel Wolf

Heinz-Joachim Gilsdorf

Volker Wagner

Heinz Reichert

Ünal Gazyakan

Lara Ruth Turner

Mesut Er

Jörg Kurth

Manfred Geier

Friedrich Saibold

Marc Schieß

Michael Linder

Robert Zdych

Dietmar Gehring

Karl Benkler

Joachim Engel

Andreas Füssl

Michael Fleps-Dezasse

Lothar Beigang

Nils Mühl

Grzegorz Ziemski

Roman Frei

Markus Hülsmann

Rene Schwarze

Christian Stephan

Lars Schories

Carsten Stamm

Michel Wilde

Angela Squeri

Marc Schiess

Nithin Sreeprakash

Martin MÜNSTER

Hippe Marko

Splittstösser Jörg

A method for determining a longitudinal tire stiffness (K) for at least one wheel on a motor vehicle while the motor vehicle is in operation, may include generating a sinusoidal modulation of an axle drive torque or wheel drive torque necessary for maintaining the current vehicle speed (v), or a braking torque or recuperation torque necessary for maintaining the current braking power in at least one wheel for a sinusoidal excitation of a wheel rotational rate (ω), such that a sinusoidal oscillation in the wheel rotational rate is induced. The method may also include detecting the resulting sinusoidal oscillation in the wheel rotational rate, determining the amplitude (ω) of the oscillation in the wheel rotational rate induced, and determining longitudinal tire stiffness (K) from the amplitude (ω). A corresponding apparatus for carrying out the method may be included.

Method and device for determining longitudinal tire stiffness

The disclosure relates to a process of ascertaining an input variable of a vehicle actuator using a model-based predictive control. A processor unit accesses trajectory information and a state data set, which represents a state of surroundings of a vehicle, the vehicle, and/or the vehicle, by an interface. The processor unit carries out a secondary condition algorithm in order to calculate a secondary condition and an MPC algorithm for a model-based predictive control. By carrying out the secondary condition algorithm, a secondary condition is ascertained for the MPC algorithm based on the trajectory information and the state data set. By carrying out the MPC algorithm, an input variable is ascertained for an actuator of the vehicle based on the secondary condition. This is carried out such that in a future predicted trajectory, the vehicle follows the specified trajectory with a specified degree of reliability.

Ascertaining an input variable of a vehicle actuator using a model-based predictive control

A gearwheel for a gear system for a planetary gear system of a chassis assistance system. The gearwheel is divided into at least a first spur gear and a second spur gear which are spaced apart from one another along a common rotational axis. The gearwheel has, in addition, an open spring ring with a first end, which is supported in a circumferential direction against the first spur gear, and a second end, which is supported in the direction opposite to the circumferential direction against the second spur gear in such manner that by rotating the spur gears, relative to one another about the common rotational axis, the spring ring can be stressed in order to exert a restoring torque on the spur gears. A recess is formed on at least one of the spur gears for holding part of the spring ring.

Gear for a gear train

A tire () rolls on a surface (). A method () for providing maximum traction coefficient between the tire () and the surface () include steps for detecting a momentary slip of the tire () on the surface (); detecting a momentary traction coefficient; forming a tuple () from the slip and the current traction coefficient; choosing a characteristic curve () from a number of predetermined characteristic curves () on the basis of the tuple (), whereby each characteristic curve () describes a traction behavior of the tire () or a corresponding characteristic pitch; determining the maximum traction coefficient on the basis of the selected characteristic curves (); and thus providing the maximum traction coefficient.

Determining a maximum frictional-connection coefficient

The present disclosure describes a parking lock gear mechanism including a planetary gear train with a sun gear, a ring gear, and at least one planet gear that meshes with the sun gear and the ring gear. The at least one planet gear may be attached to a rotating planet carrier. The parking lock gear mechanism may also have a spring unit coupled to the ring gear, where the spring unit is configured such that it is tensioned by a rotation of the ring gear, and exerts a torque and/or force on the ring gear when it is tensioned. A ring gear securing unit may be configured to secure the ring gear against rotation in a first operating state, and to release the ring gear such that it can rotate in a second operating state.

Parking lock gear mechanism, and method for operating a parking lock gear mechanism of a vehicle

A stabilizer () for the anti-roll stabilization of a vehicle (). The stabilizer () has a first stabilizer element () and a second stabilizer element (). The first stabilizer element () is, or can be, coupled to a first wheel suspension element () of the vehicle () and the second stabilizer element () is, or can be, coupled to a second wheel suspension element () of the vehicle (). Furthermore, the stabilizer () is provided with an electric motor () designed to rotate the first stabilizer element (), relative to the second stabilizer element () in response to a control signal, so as to decouple the first wheel suspension element () from the second wheel suspension element (). In this case the control signal represents a signal determined on the basis of a field-orientated control system.

Anti-roll bar for the rolling stabilization of a vehicle and method for operating such an anti-roll bar

A device for propelling a vehicle includes at least two electric motors, whereas each of the electric motors is equipped with a cooling device. The cooling device includes at least one cooling fluid line, whereas the cooling fluid lines are connected to the two cooling devices through a common cooling fluid connection line.

Apparatus for cooling electric motors

A drive unit, for an electric vehicle, comprising an electric machine that can be arranged in the area of an end of a vehicle axle of the electric vehicle and also a transmission unit, which co-operates with the electric machine, for driving a wheel of the electric vehicle. The electric machine and the transmission unit can be arranged adjacent to the wheel. The electric machine is designed so that the electric machine can be arranged adjacent to a wheel at either of the two ends of the vehicle axle in the drive unit for driving the wheel concerned. The invention also concerns a vehicle axle incorporating the drive unit.

Drive unit and vehicle axle for an electric vehicle

A drive device located closely adjacent to the wheel for a single wheel of a motor vehicle. The drive device has an electric drive that has at least one driveshaft for the wheel. A gearing interacts with the at least one drive shaft for transmitting torque to drive the wheel and is connectable to the individual wheel. A locking mechanism is disposed to lock the wheel and is designed to block the gearing and/or the drive shaft.

Drive device for an individual wheel of a motor vehicle

A drive device () for driving a wheel () of an electrically powered vehicle having an electric machine () and a transmission unit. The transmission unit has a spur gear transmission () and a planetary transmission () which, when viewed in the direction of the flow of force during a traction operation, is positioned on the output side of the electric machine () in the sequence of the planetary transmission () and then the spur gear transmission ().

Drive device for driving a wheel for an electrically powered vehicle

A vehicle axle, in particular a torsion beam axle for an electric vehicle, with at least one trailing arm on which is arranged a drive unit located close to a wheel, and the drive unit comprises an electric machine and a transmission unit. The drive unit, close to the wheel, has at least one supply line and at least one damper such that the drive unit, close to the wheel, is formed at least partially as a trailing arm and the damper is connected, on at least one side, to the drive unit at least in a single-shear manner and can be connected, on at least the other side, to a body of the electric vehicle. The at least one vehicle axle is utilized on a motor vehicle.

Axle for a motor vehicle

A method of producing a trailing arm of a torsion beam axle in which an integrated drive unit of a wheel-adjacent electric drive has an electric machine and a transmission. By using the method, the trailing arm is produced in the form of a casting with a box profile. The contours for producing the area that accommodates the transmission, the connection point to the vehicle body, the bore that receives the cross-member which connects the two trailing arms to one another, the U-profile of the trailing arm, the box profile and the area that accommodates the electric machine, are modeled by cores such that the contours for producing the connection point of the trailing arm to the vehicle body, the bore that receives the cross-member and the U-profile of the trailing arm are modeled by one core.

Method for producing a trailing arm of a twist beam axle in which a drive unit of an electrical drive close to the wheel, comprising an electrical engine and a transmission, is integrated

A mechanism for changing the operating condition of a shifting element having two shifting element halves, which can either be functionally connected to connect two components or disengaged to break the connection between the components. The mechanism includes a drive machine and a drive converter unit in the area of which rotary drive motion of the drive machine can be converted into a translational actuation movement of the shifting element. A spring device is associated with the drive converter unit, whose spring force assists with actuating the shifting element in the engaging direction. The spring device includes an approximately circular flat spring element which, in at least one area of the drive converter unit, is in contact with at least one cam, whose stress condition varies as a function of an operating condition of the drive converter unit and is designed to be rotationally fixed.

Device for changing an operational status of a shifting element with two shifting element halves

A mechanism for actuating a shifting element. A first shifting element half of a brake is axially fixedly connected to a drive machine output shaft, which, when rotational movement of the output shaft equals the disengaging movement of the shifting element, is rotationally fixed to the output shaft. In the event of an engaging force, opposite the disengaging movement of the shifting element, an axial force acts on the output shaft, such that the first shifting element half frictionally engages with an axially and rotationally fixed second shifting element half. In the event of a disengaging force that acts in the disengaging direction of the shifting element, an axial force acts on the motor output shaft such that the first shifting element half of the brake is moved out of frictional engagement with the second shifting element half.

Device for actuating a shifting element with two shifting element halves

A drive train arrangement for a vehicle comprising a main transmission and a transfer box which are both housed within a transmission housing. The transfer box comprises a drive output which is connected to a rear axle differential transmission and connectable, by a torque transmission element and a connecting shaft, to a front axle differential transmission. The connecting shaft is arranged at a predetermined angle relative to the drive output shaft of the main transmission. The end of the connecting shaft, facing toward the front axle differential transmission, is actively connected to the front axle differential transmission. The front axle differential transmission is fixed to the vehicle by at least one adaptor device allowing the front axle differential transmission to be adapted to a variety of arrangement positions along the rotation axis of the connection shaft.

Drive train arrangement for a vehicle

Growing community of inventors

Friedrichshafen, Germany

Ulrich Mair