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Title:
METHOD FOR REDUCING LOW-FREQUENCY VIBRATIONS IN THE DRIVE TRAIN OF A MOTOR VEHICLE
Document Type and Number:
WIPO Patent Application WO/2015/158343
Kind Code:
A3
Abstract:
The invention relates to a method for reducing intermittently occurring vibrations, in particular shudder vibrations of a sub-assembly which is automatically controlled by an actuator, in particular a clutch actuator, on the basis of a set-point torque, in particular a clutch set-point torque assigned to a clutch torque that is to be transmitted, said sub-assembly being arranged in particular in a drive train of a motor vehicle between an internal combustion engine and a transmission and being in particular a friction clutch having an actual torque that is affected by recurrent vibrations. According to the invention, vibration portions having a known form with unknown coefficients are continuously calculated from an input signal that is representative of an actual vibration-affected torque on the basis of a known transmission behaviour of said actual torque, an in-phase correction torque is determined from said portions and the correction torque is used to correct the set-point torque. In order to separate and resolve multiple vibration portions, the input signal is based on an estimation model and the coefficients are determined on the basis of a recursive method of least square errors.

Inventors:
NEUBERTH ULRICH (DE)
Application Number:
DE2015/200196
Publication Date:
December 10, 2015
Filing Date:
March 26, 2015
Export Citation:
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Assignee:
SCHAEFFLER TECHNOLOGIES AG (DE)
International Classes:
F16D48/06; G05B13/04; G05B17/02; G05D19/02
Domestic Patent References:
WO2001098845A12001-12-27
Foreign References:
DE102012217132A12013-04-04
DE4009200A11991-09-26
DE10254392A12004-05-27
DE19907454A12000-08-24
DE102008052058B32009-11-12
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