Method for controlling a dual clutch transmission

A dual-clutch, clutch technology, applied in the direction of clutches, mechanical equipment, etc., can solve problems such as the inability to successfully perform the shifting process, and achieve the effect of providing usability

Inactive Publication Date: 2016-09-14
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of increased band torque, the force required to engage the gear is often greater than can be provided, so that the in-gear process cannot be successfully carried out

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] After disengaging the gear with the clutch disengaged, the speed of the transmission input shaft is observed according to the method of contact point adaptation based on the speed of the input shaft described in DE 10 2010 024 941 A1, and the usually very small band displacement is determined from the speed gradient of the transmission input shaft The torque serves as a reference torque, which is caused, for example, by bearing friction. After the reference torque has been determined, the clutch is engaged at a point below the contact point, thereby actively changing the rotational speed gradient of the input shaft. To determine the reference torque, a fixed time interval is required in which there is a sufficient slip ratio between the engine speed and the input shaft speed. For the determination of the belt torque, this condition is relaxed so that the calculation of the belt torque is performed either after a fixed time interval or after the slip ratio has subsided. ...

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PUM

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Abstract

Method for controlling a twin clutch transmission with at least two partial transmissions, each of which can be coupled to a drive unit by means of a clutch, characterized in that, in order to determine whether there is an increased drag torque in a clutch, the following step is executed whenever, when the clutch is open, a gear change is carried out from an engaged gear in neutral in the partial transmission to which the clutch is assigned: determining the drag torque either during a predetermined period of time while the clutch is open or until the slip has been reduced, depending on which occurs earlier.

Description

technical field [0001] The invention relates to a method with the features according to the preamble of claim 1 and a device with the features according to the preamble of claim 10 . Background technique [0002] The field of application and the object of use of the invention is to increase the availability of a dual-clutch system in the event of an increased drag torque on at least one of the two clutches of the dual-clutch system. The terms "dual clutch system" and "dual clutch transmission" are used synonymously within the scope of this document. Such a dual clutch transmission is known to those skilled in the art and is described, for example, in DE 10 2010 024 941 A1. In the following, reference is always made to the description according to DE 10 2010 024 941 A1. The terms "drive unit", "internal combustion engine" and "motor" are likewise synonyms within the scope of this document. [0003] In a dual clutch system, depending on extreme events, such as starting up a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D48/08
CPCF16D48/08F16D2500/1086F16D2500/30406F16D2500/30421F16D2500/50251F16D2500/5029F16D2500/50669F16D2500/70458F16D2500/70464F16D2500/7105
Inventor 埃哈德·霍德鲁斯
Owner SCHAEFFLER TECH AG & CO KG
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