Luk Lamellen Und Kupplungsbau Beteiligungs Kg

Schaeffler Technologies Ag & Co .kg

Boris Serebrennikov

Reinhard Berger

Gunter Hirt

Stefan Winkelmann

Martin Vornehm

Robert Fischer

Alexander Schweizer

Klaus Henneberger

Gerd Ahnert

Burkhard Pollak

Dietmar Lang

Viggo Lauritz Norum

Lars Lein

Martin Eckert

Jörg Metzger

Frank Bast

Geir Huseby

Lidvar Budal

Brad Shellhammer

Jeremy Whitmer

Carsten Bünder

Alexander Fidlin

The invention relates to a drivetrain having an automatic clutch.

Regulated drivetrain for damping out vibrations

The invention relates to a method for reducing chatter in automotive drive train which comprises an internal combustion engine as the drive and a clutch device. According to the method, a rotating component of the drive train is driven by means of the internal combustion engine and the speed of the component is detected. Any chatter is also detected. When chatter occurs, an electric motor is used to transmit a torque onto the rotating component in order to actively dampen the chatter. The rotating component is driven by the electric motor for any chatter component at which the speed of the rotating component decreases and the rotating component is slowed down by the electric motor for any chatter component at which the speed of the rotating component increases.

Automotive drive train and method for reducing chatter in the same

Process for reducing clutch-grabbing oscillations in a motor vehicle drive train having a drive motor, clutch and another drive train, in which process the moment transmitted by the clutch for the control of an actuator that operates an operating member of the clutch when oscillations occur is changed such that oscillations are diminished, where an electric voltage driving the actuator is modulated according to the formula:*(1&#x2212;), whereby,

Process and device for the reduction of clutch-grabbing oscillations in a motor vehicle drive train

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

Juddering vibrations are reduced in a motor vehicle drive train that is loadable by a drive device comprising an internal combustion engine, a clutch device and a transmission device, by performing the steps of (i) determining whether juddering vibrations are present; (ii) disposing or coupling in or to the motor vehicle drive train a device selected from the group consisting of an internal combustion engine, a clutch device and a transmission device; (iii) assigning a rotary parameter to a drive train component, wherein the parameter is torque or speed, and (iv) adjusting at least one of the devices to counteract the juddering vibrations, where in response to the adjusting, the rotary parameter is modified and in response to modifying the rotary parameter, the juddering vibration is modified over time.

Method for reducing juddering vibrations

A method for synchronizing a gearbox in a vehicle, whereby the engine and/or the clutch are controlled in a suitable manner during synchronization. In addition, a device for damping the vibrations in a gearbox, especially during synchronization, wherein at least one torsion damper is provided.

Method for synchronizing a gearbox and device for damping the vibrations in gearbox, especially during synchronization

A power transmission for a motor vehicle. The transmission includes a plurality of transmission ratio steps defined by pairs of gear carried on parallel shafts, and final output mechanisms for engaging desired transmission ratio steps. The final output mechanisms are operable for controlling the engagement of respective transmission ratio steps to minimize tractive force interruption by allowing rapid gear changes to be effected to reduce the times between shifts of gears. By sensing accelerator pedal position and vehicle speed a new transmission ratio step to be subsequently engaged can be pre-selected while an engaged gear remains engaged.

Transmission

In a motor vehicle transmission, gears representing different transmission ratios are engaged by applying a force to an actuator output element that couples a selected gear to a rotary shaft. A synchronizing device blocks the coupling of the gear to the shaft until at least an approximate synchronization of rpm-rates has been achieved. A synchronization threshold position corresponding to the blocked condition of the actuator element is stored in a memory of a controller device. The controller device periodically performs an automatic adaptation of the stored value for the synchronization threshold position.

Motor vehicle with a gearbox and method for operating a motor vehicle

Growing community of inventors

Bühl, Germany

Boris Serebrennikov