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Clutch control with hysteresis considerations

A friction clutch and hysteresis technology, applied in clutches, mechanical equipment, etc., can solve problems such as friction and elastic effect hysteresis, achieve accurate transmission, and improve driving comfort

Active Publication Date: 2019-02-22
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, frictional and elastic effects in the region of the hydraulic lines can cause hysteresis effects, so that the actuation of the friction clutch is not determined solely by the position of the active piston, but also additionally by the preceding actuation direction of the active piston.

Method used

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  • Clutch control with hysteresis considerations
  • Clutch control with hysteresis considerations
  • Clutch control with hysteresis considerations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A clutch system 100 is shown for use in a drive train, for example in a motor vehicle. Clutch system 100 includes a friction clutch, an actuating device 110 and a control device 112 , which are designed electrohydraulic in the present embodiment. It is irrelevant for the consideration whether the torque transmittable via the friction clutch increases when the actuation by means of the actuation device 110 is increased or decreased. Friction clutches are especially capable of transferring torque between the engine and the transmission. In one embodiment, the friction clutch is part of a dual clutch of a dual clutch transmission.

[0025] In the embodiment shown, the actuating device 110 can be controlled electrically. This is also a "clutch-by-wire" system if actuation is performed by means of an electro-sensitive clutch pedal. Actuating device 110 includes an electric actuator 115 and a hydrostatic line 120 . The hydrostatic line 120 includes a master cyli...

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PUM

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Abstract

The invention relates to a friction clutch (105), which can be actuated by means of a slave piston (140), which is coupled to a master piston (130) by means of a hydrostatic line (120). A method is proposed for controlling a torque transmittable via a friction clutch (105), comprising the steps of controlling the position of the master piston on the basis of a transfer function between the position of the master piston and the position of the slave piston, wherein additionally The position of the active piston is controlled based on a hysteresis effect determined based on the traversed direction of motion of one of the pistons and the position of the active piston. In this case, the hysteresis influence is determined on the basis of a plurality of support points which are each valid for a predetermined range of the position of the active piston.

Description

technical field [0001] The present invention relates to clutch control. In particular, the invention relates to controlling the hydraulic actuation of clutches, taking into account the hysteresis characteristic of the actuation. Background technique [0002] The drive train in a motor vehicle includes a friction clutch by means of which the transmission of torque in the drive train can be interrupted. Here, the friction clutch is actuated hydraulically. In the first embodiment, increased actuation causes the friction clutch to close, and in the second embodiment, causes the friction clutch to disengage. The elastic elements each provide a force counteracting the actuation. The hydraulic actuation comprises a master cylinder with a master piston and a slave cylinder with a slave piston, the two cylinders being hydraulically coupled to each other. If the position of the master piston is changed, this acts on the slave piston and correspondingly changes the torque transmitt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D48/06
CPCF16D48/066F16D2500/1026F16D2500/1045F16D2500/50287F16D2500/7041F16D2500/10412F16D2500/5012F16D2500/70235F16D2500/70668F16D2500/70684
Inventor 伊夫·贝尔廷·达斯-蒂约
Owner SCHAEFFLER TECH AG & CO KG
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