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Method for filtering a position signal of a position sensor of a clutch actuation device

A clutch manipulation, displacement sensor technology, applied in clutches, friction clutches, mechanical drive clutches, etc., can solve problems such as displacement and vibration that are difficult to measure accurately

Active Publication Date: 2019-06-14
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the friction clutch and the clutch actuating device are not arranged in a straight line relative to each other due to tolerances, oscillations at the actuation bearing and thus at the displacement sensor, which are related to the rotational speed of the friction clutch, occur at the displacement sensor, which cause the displacement sensor to The vibration of the displacement signal, so it is difficult to measure the accurate displacement

Method used

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  • Method for filtering a position signal of a position sensor of a clutch actuation device
  • Method for filtering a position signal of a position sensor of a clutch actuation device
  • Method for filtering a position signal of a position sensor of a clutch actuation device

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Embodiment Construction

[0033] figure 1 A device 10 is shown schematically with a friction clutch 1 arranged about an axis of rotation d and having a clutch actuating device 2 . In the exemplary embodiment shown, the clutch actuating device 2 is designed as a clutch auxiliary cylinder 3 with a piston 4 . The piston 4 acts on the diaphragm spring 5 to actuate the friction clutch 1 with an axial displacement along the axis of rotation d. Axial displacement is detected by sensor 6 . The displacement signal is transmitted to the controller 8 through the cable 7 to control the friction clutch 1, and the controller is connected to a signal bus 9 such as a CAN bus. Piston 4 is tilted due to manufacturing or assembly-induced misalignment of diaphragm spring 5 . Since the displacement sensor 6 is arranged on the outside of the piston 4, the tilting of the piston 4 is additionally amplified in the displacement signal.

[0034]Since the friction clutch 1 rotates around the axis of rotation d at a predeterm...

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PUM

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Abstract

The invention relates to a method for filtering a position signal (S) of a positions sensor of a clutch actuation device of a friction clutch in a drive train of a motor vehicle. In order to eliminatevibrations occurring in an in particular hydrostatically designed clutch actuation device due to a non-linear arrangement, the position signal (S) is filtered by means of a low pass filter (12), theposition signal (S) is additionally filtered in a first filter element (13) having a sliding average and in a second filter element (14) as a hysteresis filter (15), wherein both filtered position signals (S(m), (S(h)) are weighted in a decision module (16) in order to minimize deviations of the filtered position signal (S(s)) from the actual position.

Description

technical field [0001] The invention relates to a method for filtering displacement signals of a displacement sensor of a clutch actuating device of a friction clutch in a drive train of a motor vehicle. Background technique [0002] The clutch actuating device is used to actuate friction clutches in the drive train of a motor vehicle. In this case, the clutch actuating devices are arranged fixedly relative to the housing around the transmission input shaft of the transmission and act on the diaphragm spring of the friction clutch by means of a displacement of the rotationally decoupled actuating bearing along the axis of rotation of the friction clutch. or similar leverage system. Depending on the design of the friction clutch as a normally closed or normally open friction clutch, the friction clutch is disengaged or engaged as the displacement increases. For monitoring displacements, in particular for measuring the clutch torque transmitted by the friction clutch, displa...

Claims

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Application Information

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IPC IPC(8): F16D48/00F16D13/00F16D48/06
CPCF16D13/00F16D48/00F16D48/06F16D2300/18F16D2500/302F16D2500/3026F16D2500/7041F16D2500/70668F16D2500/70673
Inventor 格奥尔·格珀特
Owner SCHAEFFLER TECH AG & CO KG
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