Method for controlling judder vibrations in a drive train and transmission and drive train

A technology for automatic transmissions and drive trains, applied to clutches, mechanical equipment, etc., can solve problems such as unstable transfer functions of transfer characteristics and inability to effectively implement vibration damping functions

Active Publication Date: 2019-03-01
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For example, if changes in the transfer characteristics of the actuator (unstable transfer function) go undetected, the desired damping function may not be effectively implemented

Method used

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  • Method for controlling judder vibrations in a drive train and transmission and drive train
  • Method for controlling judder vibrations in a drive train and transmission and drive train
  • Method for controlling judder vibrations in a drive train and transmission and drive train

Examples

Experimental program
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Embodiment Construction

[0041] exist figure 1 The drive train 1 of the example of a motor vehicle 100 (dashed box) is shown in . The engine 2 is connected via a clutch 3 to a transmission 4 , which drives drive wheels 8 via a cardan shaft 5 , a differential 6 and two cardan shafts 7 .

[0042] The clutch 3 is actuated by an actuator 9 which is actuated, for example electrohydraulic or electromechanical. The transmission 4 is designed as an automatic transmission, and in particular as a dual clutch transmission, wherein one or more clutches 3 are designed as friction clutches.

[0043] Both the shift that triggers the actuation of the clutch 3 and the shift that is adjusted accordingly in the transmission 4 are triggered by the actuating device 10 and carried out by the adjusting device 10 a. The load control of the engine 2 takes place via an oil supply pedal 11 , which actuates a power regulator 13 of the engine 2 either directly or via an engine control unit 12 .

[0044] In order to detect the ...

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Abstract

The invention relates to a method for controlling shudder vibrations in a drive train (1) of a motor vehicle (100), said drive train comprising a drive unit (2), a vehicle transmission (4) and a transmission system for operating, in particular automatic, Actuator (9) of a friction clutch (3), the method comprising: modulating the clutch torque with the aid of a damping function for attenuating chatter vibrations and implementing a test function (S) on the actuator (9) SOLL ;20); Determine the actual transfer characteristics (S) of the actuator (9) IST ;21); Determine the actual transfer characteristics (S) of the actuator (9) IST ;21) and actuator (9) rated transmission characteristics (S SOLL ; 20) deviation (ΔOA; ΔUA; ΔT), and implement the vibration damping function (M K ). The invention furthermore relates to a transmission (3) and a drive train (1) for carrying out the method.

Description

technical field [0001] The invention relates to a method for controlling juddering vibrations in a drive train of a motor vehicle comprising a drive unit, a vehicle transmission and an actuator for actuating a friction clutch, wherein vibration damping for damping juddering vibrations The function modulates the clutch torque. Background technique [0002] Rudder vibrations are vibrations that occur frequently in drive trains and are caused by frictional contact at clutches. In particular, such vibrations occur in sliding friction clutches, where they are caused, for example, by self-excited friction vibrations in the friction system through the stick-slip effect. Tolerances in the clutch system that cause deviations from the original structural geometry or through wear can excite such vibrations. Judder vibrations additionally stress the relevant components in the drive train and impair driving comfort. Therefore, such chattering vibrations are undesirable. [0003] A nu...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F16D48/06B60W30/20
CPCF16D48/06F16D2500/10412F16D2500/3026F16D2500/30412F16D2500/30421F16D2500/30806F16D2500/50293F16D2500/7109
InventorR·霍夫曼
OwnerVOLKSWAGEN AG