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Method of monitoring friction clutch having at least two clutch plates bonded to each other

A technology of friction clutches and clutch discs, which is applied to clutches, mechanical equipment, etc., and can solve problems such as clutch damage

Active Publication Date: 2018-01-09
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the fault message is mostly ignored by the driver, clutch damage often occurs

Method used

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  • Method of monitoring friction clutch having at least two clutch plates bonded to each other

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] 100%-line 1, 80%-line 2 and 40%-line 3. 40% - Line 3 corresponds to the fatigue strength limit of the friction clutch.

[0022] If slipping or slipping of the friction clutch occurs, the value of the unit friction work produced here is firstly gradually added to the first branch line 4 of the cumulative unit friction work curve 5 until the accumulated unit friction work has reached 40%- Line 3. If the value of the specific friction work falls below the 40% line 3 , no further accumulation of the value of the specific friction work takes place, as indicated by the second branch 6 of the cumulative specific friction work curve 5 .

[0023] The value of the specific friction work then exceeds the 40%-line so that the value continues to accumulate, as shown by the third branch 7 of the cumulative specific work of friction curve 5 .

[0024] If the value of the specific friction work then falls below the 40%-line 3 again, no further accumulation of the value of the specifi...

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PUM

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Abstract

The invention relates to a method for monitoring a friction clutch in a vehicle drive train. The friction clutch comprises at least two clutch plates bonded to each other, and one of the clutch platesis torque-driven by a drive motor. The friction clutch is characterized in that when the clutch slips, the unit friction work actually generated on the friction clutch is detected and values of the detected unit friction work are accumulated and are stored in a memory of a control unit, and when a first part of a preset limit of the accumulated friction work value is reached, the control unit gives out an alarm. When a second part of the preset limit of the accumulated friction work value is reached and / or exceeded, the control unit control a drive motor, so that torque applied by the drive motor on the drive motor is reduced.

Description

technical field [0001] The invention relates to a method for monitoring a friction clutch in a drive train of a vehicle, the friction clutch having at least two clutch plates engaging one another, one of the clutch plates being driven with torque by a drive motor. Background technique [0002] In this method, it is known to output a fault message to the driver of the vehicle if the friction clutch is overloaded and the clutch discs of the friction clutch rub or slip against each other. Since this error message is mostly ignored by the driver, clutch damage often occurs. Contents of the invention [0003] The object of the present invention is to provide a method as described at the outset which avoids such clutch damage at least in most cases. [0004] This task is solved according to the invention in that the specific frictional work actually produced on the friction clutch is detected when the clutch is slipping or slipping, and the detected values ​​of the specific fri...

Claims

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Application Information

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IPC IPC(8): F16D48/06B60W30/186
CPCF16D48/06F16D2500/10412F16D2500/1045F16D2500/30402F16D2500/30406F16D2500/30412F16D2500/3065F16D2500/5102F16D2500/5106F16D2500/70408F16D2500/7044F16D2500/70615F16D2500/7101
Inventor A·施托比克M·施托克鲍尔
Owner ZF FRIEDRICHSHAFEN AG
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