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Method for operating automated dual clutch transmission in motor vehicle, involves setting starting value for pressure in starting phase, where starting value is smaller than transmission minimal value

A dual-clutch, transmission technology, applied to clutches, mechanical equipment, vehicle components, etc., can solve problems such as long time and clutch collision

Active Publication Date: 2014-05-21
GETRAG FORD TRANSMISSIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found that in the above-mentioned situation an undesired clutch collision (Kupplungsschlag) occurs when the engine is started again
The time required between the engine starting up again and the actual reversing of the vehicle is also longer

Method used

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  • Method for operating automated dual clutch transmission in motor vehicle, involves setting starting value for pressure in starting phase, where starting value is smaller than transmission minimal value
  • Method for operating automated dual clutch transmission in motor vehicle, involves setting starting value for pressure in starting phase, where starting value is smaller than transmission minimal value

Examples

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Embodiment Construction

[0025] figure 1 The control unit identified with 1 is shown. The control device 1 is used to selectively apply pressurized oil to the first clutch 2 and the second clutch 3 of a dual-clutch transmission (not shown further here), so that the dual-clutch transmission can be operated in a desired manner. In addition, in figure 1 The gearshift system marked 4 of the dual clutch transmission is only schematically shown in FIG. The shifting system is used for shifting in and out of a dual clutch transmission.

[0026]The first clutch 2 is to be assigned to the first sub-transmission of the dual-clutch transmission, to which a reverse gear R, a first forward gear I and further odd-numbered forward gears III, V are also assigned. Because these gears R, I, III, V and the first clutch are assigned to the same sub-transmission (first sub-transmission), in figure 1 In addition to the first clutch 2 shown schematically, the symbols R, I, III, V are listed in the illustration. In a sim...

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Abstract

The method involves setting a starting value for a pressure (13) in a starting phase, where the starting value is smaller than a transmission minimal value. The overrun of a clutch (2) transmits a torque during the pressure application. An operating value is set for the pressure after completing the starting phase. The target value is higher than the transmission minimal value of the clutch. The presetting of the operation value is performed immediately after setting the starting value.

Description

technical field [0001] The invention relates to a method for operating an automated dual-clutch transmission in a motor vehicle, wherein the dual-clutch transmission has a first sub-transmission with a first clutch, a second sub-transmission with a second clutch, The shifting system for entering and disengaging the gears of the two sub-transmissions and the hydraulic controls for operating the clutches and the shifting system. Background technique [0002] A dual clutch transmission of the type mentioned at the outset is known from EP1921351B1. In this case, the control device of the dual clutch transmission of EP 1921351 B1 comprises a first regulating valve for generating a first pressure and a first switching valve for switching the first pressure to a first clutch or to a gearshift system. Furthermore, the control device includes a second regulating valve for generating the second pressure and a second switchover valve for switching the second pressure to the second clu...

Claims

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Application Information

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IPC IPC(8): F16H61/04F16H61/688
CPCF16H61/04F16H61/688F16H2061/0429B60Y2300/18016B60Y2300/18033F16D48/062F16D48/08F16D2048/0281F16D2500/10412F16D2500/70406F16D2500/7041F16D2500/70418F16H61/0206F16H2312/12
Inventor P·何R·默尔曼M·亨宁K·巴德克
Owner GETRAG FORD TRANSMISSIONS GMBH
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