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Method for controlling a clutch unit

A clutch, friction clutch technology, applied in the direction of clutch, friction clutch, mechanical drive clutch, etc., can solve problems such as reducing the driving performance of motor vehicles, and achieve the effect of improving driving dynamics

Active Publication Date: 2021-11-16
MAGNA POWERTRAIN AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces the driving performance of the motor vehicle if all-wheel drive is required from the point of view of driving dynamics

Method used

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  • Method for controlling a clutch unit

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The sequence of the method according to the invention for controlling a clutch unit of a drive train of a motor vehicle is schematically shown in the figure.

[0026] The clutch unit controlled by the method includes an oil-cooled friction clutch for variably transmitting torque from an input member to an output member of the clutch unit. The output element of the clutch unit is connected in a rotationally fixed manner to the cardan shaft, so that the clutch unit transmits torque to the rear axle of the motor vehicle in a variably controllable manner.

[0027] According to the method, the heat input contributing to the oil heating of the clutch unit is first calculated in step 1 . The calculation includes determining the torque-dependent heat input as substep 1.1 of step 1, taking into account the heat input from the current torque of the drive train on the side of the output element 7 . Furthermore, the speed-dependent heat input 1.2 is taken into account in the calcu...

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Abstract

The invention relates to a method for controlling a clutch unit for a drive train of a motor vehicle, the clutch unit comprising a wet-running friction clutch for controllably transmitting a torque from an input element to an output element of the clutch unit, the clutch unit comprising oil for cooling the friction clutch, wherein: heat inputs, which contribute to heating of the oil of the clutch unit, are calculated (1); heat outputs, which contribute to cooling of the oil of the clutch unit, are calculated (2); the maximum permissible clutch torque is calculated according to the heat inputs and the heat outputs (3); and the current clutch torque of the friction clutch is limited to the maximum permissible clutch torque (4).

Description

technical field [0001] The invention relates to a method and a torque transmission device for controlling a clutch unit of a powertrain of a motor vehicle, having an input element, an output element, a control device and a clutch unit. Background technique [0002] A clutch unit for a powertrain of a motor vehicle is known, wherein the clutch unit comprises a wet friction clutch for controllably transmitting torque from an input member to an output member of the clutch unit. [0003] Such clutch units are used, for example, in transfer cases of motor vehicles with all-wheel drive for the controlled transmission of drive torque to the main and / or auxiliary axles of the motor vehicle. In a so-called "torque-on-demand" transfer case, the wheels of the main axle are permanently driven, while part of the drive torque can be selectively transmitted to the wheels of the secondary axle by means of the aforementioned clutch unit. For example, the transfer case can also be designed a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D48/06
CPCF16D2500/525F16D2500/3168F16D2500/10412F16D48/06F16D2500/7044F16D2500/1045F16D2500/30421F16D2500/7043F16D2500/3121F16D2500/30426F16D2500/3056F16D2500/5106F16D2500/3108F16D2500/10431F16D13/72F16D2500/30822F16D2500/70689
Inventor 米凯尔·科尔曼扬·维希曼
Owner MAGNA POWERTRAIN AG & CO KG