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Method for positioning piston

A piston and stop position technology, applied in non-mechanical drive clutches, fluid drive clutches, electric clutches, etc., can solve problems such as gap leakage

Active Publication Date: 2016-03-30
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From this point on, the piston-cylinder-seal system should be tight, but because at low temperatures the seals are no longer very elastic, said seals are no longer able to accommodate the closing of the piston to the same extent as at high temperatures. , smooth surface
Thus, due to the rosette shape a gap occurs between the seal and the piston surface, said gap thus causing leakage and the desired pressure can no longer be built up

Method used

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  • Method for positioning piston
  • Method for positioning piston
  • Method for positioning piston

Examples

Experimental program
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Embodiment Construction

[0029] exist figure 1 The configuration of the hydraulic clutch system 1 is schematically shown in FIG. 1 by way of example of a schematically shown hydraulic and hydrostatic clutch actuator (HCA) known from the prior art. The schematic diagram only shows the configuration for actuating one of the two clutches of the dual clutch transmission, the second clutch being actuated analogously. On the drive side 15 , hydraulic clutch system 1 includes a control device 2 , which controls an actuator 3 . With the actuator 3 and the piston 19 changing positions in the cylinder 4 to the right along the actuator path, the volume of the cylinder 4 is changed, whereby a pressure P is built up in the cylinder 4, said pressure via the pressure medium 7 via The hydraulic line 9 leads to the output side 16 of the hydraulic clutch system 1 . The hydraulic lines 9 are adapted to the structural conditions of the vehicle with respect to their length and shape. On the driven side 16, the pressure...

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PUM

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Abstract

The invention relates to a method for controlling an actuating system of an automated clutch in a motor vehicle. The control of the actuating system is accomplished by means of a control unit. The actuating system comprises a piston, a cylinder, and a sealing ring arranged on the piston or on the cylinder in a circumferential direction. The purpose of the method is to position the piston in the cylinder in an axial direction. The cylinder and / or the piston has an opening in the respective lateral surface of the cylinder and / or of the piston, over which opening the sealing ring can travel during a piston movement in the axial direction in both directions. The method is characterised in that, during a specified standstill situation of the vehicle, the piston is moved to a parking position in the cylinder, which parking position is selected in the cylinder in such a way that the sealing ring is positioned without overlap with the opening.

Description

technical field [0001] The invention relates to a method having the features according to the preamble of claim 1 . [0002] The scope of use and the object of application of the invention are hydrostatic actuators, in particular actuators for clutch actuation. Background technique [0003] German publication DE102012204635A1 discloses a control device with tracking functionality. DE 19734038 A1 discloses a throughflow circuit with a throughflow opening in a clutch brake device and a method for ascertaining the position of the throughflow opening. [0004] According to the invention, the positioning of the piston in the master cylinder is described in a clutch actuation device of a clutch of a dual clutch transmission with a hydrostatic clutch system in a non-operating vehicle. The hydrostatic clutch system is designed with a clutch actuating device, as for example in figure 1 as described in DE 10 2010 047 800 A1 and in DE 10 2010 047 801 A1. The clutch actuator is a so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D25/06F16D25/12
CPCF16D25/06F16D25/12F16D25/08F16D28/00F16D48/02F16D48/06F16D2025/081F16D2048/0212F16D2300/08F16D2500/50263
Inventor 马可·博罗夫斯基亚历山大·伦费尔
Owner SCHAEFFLER TECH AG & CO KG