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Dct control method for vehicle

a technology of clutch transmission and control method, which is applied in the direction of clutches, mechanical equipment, instruments, etc., can solve the problems of inability to reverse motion, inability to smoothly perform shift control, and remarkable decrease in driving performance, so as to achieve secure driving stability and commercial value of the vehicle

Active Publication Date: 2015-06-18
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a DCT control method for vehicles that allows for normal double clutch control without requiring a limp-home driving mode, even if the input shaft speed sensor of the transmission breaks down. This ensures driving stability and commercial value for the vehicle.

Problems solved by technology

Accordingly, when the input shaft speed sensor of the DCTs brakes, the slip amount is not determined in the synchronizing process for engaging a shift gear and gear shift control cannot be smoothly performed, so limp-home control of single clutch shift control (odd-to-odd / even-to-even) is performed without controlling the shaft for the broken input shaft speed sensor.
In this driving, the driving performance is remarkably decreased in comparison to a double clutch shift control, and particularly, in odd-to-odd driving, backward motion is impossible.

Method used

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  • Dct control method for vehicle
  • Dct control method for vehicle
  • Dct control method for vehicle

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Embodiment Construction

[0026]Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

[0027]Referring to FIG. 1, an exemplary embodiment of a DCT control method of the present invention includes: a breakdown determining step S10 that determines whether an input shaft speed sensor breaks down, a reference securing step S20 that disengages all shift gears connected to a non-driven input shaft and engages a clutch con...

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Abstract

A Dual Clutch Transmission control method may include a breakage determining step that determines whether an input shaft speed sensor breaks down, a reference securing step that disengages all shift gears connected to a non-driven input shaft and engages a clutch connected to the non-driven input shaft, when it is determined that the input shaft speed sensor broke down, and a gear shifting step that disengages the clutch connected to the non-driven input shaft and engages a shift gear of a desired shift range in accordance with a shifting instruction when the instruction for shifting to any one desired shift range of shift ranges connected to the non-driven input shaft is given after the reference securing step.

Description

CROSS-REFERENCE(S) TO RELATED APPLICATION[0001]The present application claims priority of Korean Patent Application Number 10-2013-0157746 filed on Dec. 18, 2013, the entire contents of which application is incorporated herein for all purposes by this reference.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a DCT (Dual Clutch Transmission) control method of a vehicle, and more particularly, to a technology of shifting when an input shaft speed sensor of a DCT breaks down.[0004]2. Description of Related Art[0005]Some of DCTs mounted on vehicles calculate the output speed of a transmission by performing inverse calculation of the vehicle speed obtained by a wheel speed sensor without using an output shaft speed sensor.[0006]Accordingly, when the input shaft speed sensor of the DCTs brakes, the slip amount is not determined in the synchronizing process for engaging a shift gear and gear shift control cannot be smoothly performed, so limp-home control of...

Claims

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Application Information

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IPC IPC(8): F16D48/06B60W10/10B60W10/02
CPCF16D48/06B60W10/10B60W10/02B60W10/113F16H61/12F16H61/688F16H2061/1284F16H2061/1224F16H2059/366F16H61/0403F16H59/36F16H61/00
Inventor YOON, YOUNG MIN
Owner HYUNDAI MOTOR CO LTD
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