Method for reducing pull-out vibrations of a friction clutch in a power train of a motor vehicle

A technology of power transmission system and friction clutch, applied in friction clutch, mechanical drive clutch, arrangement of multiple different prime movers of general power plant, etc., can solve problems such as difficult performance

Active Publication Date: 2018-01-12
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In case multiple frequency components with similar amplitudes occur in a defined region, the compensation can lead to a behavior that is difficult to control

Method used

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  • Method for reducing pull-out vibrations of a friction clutch in a power train of a motor vehicle

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Embodiment Construction

[0025] The invention is explained in more detail on the basis of the single drawing. The accompanying drawings illustrate the blocks of the proposed method figure 1 . box figure 1 The upper part of shows the control of a friction clutch which is automatically controlled by means of a clutch actuator known per se. The control unit outputs the desired clutch torque M(soll) for this purpose. In block 2 , a control variable SG, for example an electric actuator voltage, etc., is determined from the desired clutch value M(soll) on the basis of the clutch characteristic curve. The actual clutch torque M(ist) is regulated by means of the actuator system shown in box 3 , for example in the manner of a pilot control followed by tracking regulation. Box 4 shows the dynamic interaction in the friction clutch and the surrounding drive train, which interaction causes a geometric pull-out vibration. The result is a subsequent vibration-containing clutch torque M(s), for example at the t...

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Abstract

A method for reducing chatter vibrations of a friction clutch controlled automatically by a clutch actuator on the basis of a target clutch torque assigned to a clutch torque which is to be transmitted. The clutch has a present actual clutch torque which is marked by vibrations as a result of chatter vibrations which occur occasionally. In order to achieve a reduction of the chatter vibrations, from an input signal that is representative of the clutch torque that is marked by vibrations, on the basis of a vibration-selective guidance variable derived in a torque pattern between internal combustion engine and friction clutch, an absolute amplitude and a phase of the input signal are ascertained on the basis of a transfer function which maps the guidance variable on a vibration-selective clutch torque; from that a correction clutch torque is determined; and using that the target clutch torque is corrected.

Description

technical field [0001] The invention relates to a method for reducing pull-out vibrations of a friction clutch arranged between an internal combustion engine and a transmission in a drive train of a motor vehicle, said friction clutch being automatically controlled by a clutch actuator according to the clutch torque to be transmitted The associated desired clutch torque control, the friction clutch has a oscillating actual clutch torque due to sometimes occurring pulling vibrations. Automated friction clutches between an internal combustion engine and a transmission in the drive train of a motor vehicle have been known for a long time. In this case, instead of the driver's foot, an actuating element, such as a clutch lever, coil spring, lever spring or the like, is moved along an actuating path by means of a clutch actuator controlled by the control device. The actuating path is associated with a torque characteristic that can be adapted, for example, to external conditions s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D13/58F16F15/02
CPCF16D48/06F16D2500/3027F16D2500/3067F16D2500/30814F16D2500/3109F16D2500/50293F16D2500/70252F16D2500/70408F16D2500/70605F16D2500/70615F16D2500/70621F16D2500/70626F16D2500/70663G05D17/02Y10S903/902B60K6/387
Inventor 乌尔里希·诺伊贝特迈克尔·罗伊舍尔
Owner SCHAEFFLER TECH AG & CO KG
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