Method for determining and/or offsetting crosstalk behaviour of a dual clutch transmission

A dual-clutch, transmission technology, applied to clutches, mechanical equipment, etc., to simplify evaluation and save calculation time

Active Publication Date: 2014-09-24
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no method is given as to how these model parameters could be determined on the test rig
Furthermore, it may only be possible to determine one set of parameters for all vehicles by means of test bench measurements
However crosstalk is affected by component tolerances and thus varies (at least slightly) from clutch to clutch

Method used

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  • Method for determining and/or offsetting crosstalk behaviour of a dual clutch transmission
  • Method for determining and/or offsetting crosstalk behaviour of a dual clutch transmission

Examples

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Embodiment Construction

[0021] figure 1 A schematic diagram of a drive train 1 of a motor vehicle with a dual clutch transmission is shown. Here, a drive unit 2 , for example an internal combustion engine, is connected via a shaft 3 to a dual clutch transmission, which will be described in detail below. The dual-clutch transmission is formed from two branches and has a first sub-transmission clutch 4 , which leads to a first sub-transmission 9 . The drive unit 2 is also connected to a second sub-transmission clutch 5 , which leads to a second sub-transmission 8 . The two subtransmissions 8 , 9 lead via an axle differential 10 to a drive shaft 11 of the motor vehicle.

[0022] Different gears are stored in the subtransmissions 8 , 9 . Thus the first sub-transmission 9 has odd gears such as 1,3,5 and the second sub-transmission 8 has even gears such as 2,4,6. When actuating a dual-clutch transmission, for example, when shifting from a first gear to a second gear, the two subtransmission clutches 4,...

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Abstract

The invention relates to a method for determining the crosstalk behaviour of a hydrostatic dual clutch transmission of a motor vehicle which has two partial transmission clutches (4, 5) that are each arranged between a drive unit (2) and a partial transmission (8, 9), wherein the two partial transmission clutches (4, 5) are each actuated independently of one another via a partial transmission clutch actuator (6, 7), wherein during the actuation, the actuation pressure (p4, p5) from the partial transmission clutch actuator (6, 7) acting on the partial transmission clutch (4, 5) and a clutch actuation path travelled by the partial transmission clutch (4, 5) are determined, from which a crosstalk factor (Deltax4, Deltax5) is determined for each partial transmission clutch (4, 5). In a method for determining the crosstalk behaviour of a hydrostatic dual clutch transmission, wherein said behaviour can be determined both at the belt end and during the driving operation in the motor vehicle, each crosstalk factor (Deltax4, Deltax5) is derived from a characteristic map (K4, K5) which is generated depending on the actuation pressure (p4, p5) of both partial transmission clutches (4, 5).

Description

technical field [0001] The invention relates to a method for determining the crosstalk behavior of a hydrostatic dual clutch transmission of a motor vehicle, said dual clutch transmission having two subtransmission clutches which are respectively arranged between a drive unit and a respective subtransmission during which the two subtransmission clutches are actuated independently of each other via a subtransmission clutch actuator, wherein during actuation the actuating pressure applied by the subtransmission clutch actuator to the subtransmission clutch and the clutches passed by the subtransmission clutch are determined An actuation displacement from which a crosstalk variable is determined for each subtransmission clutch. Background technique [0002] Within the scope of this document, a hydrostatic clutch system is understood to mean a dual clutch transmission in which, in particular, a hydrostatically operated actuator HCA is provided for actuating two automatic frictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D48/06
CPCF16D2500/1024F16D2500/50236F16D2500/7041F16D2500/1086F16D2500/3024F16D2500/30806F16D2500/3026F16D48/066
Inventor 埃克哈德·赖博尔特格哈德·赫德鲁斯
Owner SCHAEFFLER TECH AG & CO KG
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