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Control method and powertrain for a powertrain

A kind of technology of drive train and control device

Active Publication Date: 2018-01-19
GETRAG GETRIEBE & ZAHNRADFABRIK HERMANN HAGENMEYER GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even in this embodiment, the relatively long shift times are problematic for multiple shifts

Method used

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  • Control method and powertrain for a powertrain
  • Control method and powertrain for a powertrain
  • Control method and powertrain for a powertrain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] figure 1 A drive train for a motor vehicle for a passenger car is shown schematically, wherein the drive train is denoted overall by 10 . The drive train 10 comprises a drive motor 12 , such as an internal combustion engine or a hybrid drive unit, a dual clutch transmission 14 and a differential 16 , by means of which drive power can be distributed to driven wheels 18L, 18R of the motor vehicle.

[0052] The dual-clutch transmission 14 has a first friction clutch 20 and a first sub-transmission 22 , which form a first power transmission branch 24 . The first sub-transmission 22 includes forward gear stages 1 , 3 , 5 , 7 . In addition, the dual-clutch transmission 14 has a second friction clutch 26 and a second sub-transmission 28 , which form a second power transmission branch 30 . The second subtransmission 28 has the even-numbered forward gear stages 2 , 4 , 6 and possibly 8 and preferably also has the reverse gear stage R here.

[0053] Furthermore, the dual clutc...

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PUM

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Abstract

The invention provides a control method for a drive train. The drive train is provided with a driving motor and a double-clutch transmission. The double-clutch transmission is provided with a first friction clutch, a second friction clutch, a first sub-transmission and a second sub-transmission and is used for configuring a first power transmission branch and a second power transmission branch. The double-clutch transmission is provided with a clutch actuator device for operating the friction clutches and a shifting actuator device which is used for engaging and disengaging the gear grade of the double-clutch transmission. The control method comprises the steps of a step for executing multiple gear reducing from a high initial gear grade to a low target gear grade by a motor vehicle; and a step of immediately disengaging the initial grade friction clutch which corresponds with an initial gear grade sub-transmission, and engaging the initial gear grade in the initial gear grade sub-transmission, afterward obtaining a gearshift intension which aims at multiple gearshift, by means of at least one intermediate gear grades, transmitting power by means of an intermediate gear grade power transmission branch, wherein the intermediate gear grade corresponds with a sub-transmission which is different from the target gear grade and is adjacent with the target gear grade, and engaging the target gear grade and performing crossed operation on the friction clutch, and closing the friction gear which corresponds wiht the target gear grade.

Description

technical field [0001] The invention relates to a method for controlling a drive train of a motor vehicle having a drive motor and a dual clutch transmission, wherein the dual clutch transmission has a first friction clutch and a second friction clutch as well as a first subtransmission and A second sub-transmission for configuring the first power transmission branch and the second power transmission branch, wherein the dual clutch transmission has a clutch actuator device for operating a friction clutch and for engaging and disengaging the dual clutch The shift actuator device of the gear stage of the transmission, starting from the driving operation of the motor vehicle in the high initial gear stage, executes multiple downshifts into the lower target gear stage. The invention also relates to a drive train for a motor vehicle. Background technique [0002] Drive trains with such dual clutch transmissions are generally known. In this case, the drive power can be transferr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/04F16H61/688
CPCF16H61/688F16H61/04F16H63/18F16H2061/0444F16H2306/14
Inventor 斯特凡·克尼斯博格斯
Owner GETRAG GETRIEBE & ZAHNRADFABRIK HERMANN HAGENMEYER GMBH & CO KG