Control method for gear pre-selection for dual clutch transmission

A dual-clutch transmission and control method technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve the problem of delayed shifting time, damage to economical power, and other vehicle performance and combination time Different problems, to achieve the effect of optimizing the timing, ensuring the driving performance and comfort of the vehicle, and ensuring the economy and power requirements

Active Publication Date: 2013-09-11
HEFEI CHANGAN AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shifting time of the synchronizer is not necessarily the same. When the shifting is smooth, the combining time of each gear is different. In the future, if the shift point is also compensated for the synchronizer shift time, it will lead to inconsistencies in the shift point and damage the overall vehicle performance such as economy and power.

Method used

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  • Control method for gear pre-selection for dual clutch transmission
  • Control method for gear pre-selection for dual clutch transmission
  • Control method for gear pre-selection for dual clutch transmission

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Embodiment Construction

[0034] In order to facilitate the understanding of the present invention, the mechanical structure, hydraulic system and control system of the dual-clutch transmission in the prior art are explained here.

[0035] Regarding the mechanical composition of the dual-clutch transmission, in addition to referring to the descriptions in the documents pointed out in the background technology, you can also refer to the applicant’s previous application number 200910260370.8, application publication number CN101737462A, and application publication date of June 2010 The Chinese invention patent application on the 16th, see also figure 1 . Such as figure 1The shown dual-clutch transmission includes two clutches, i.e. a first clutch 11 and a second clutch 12, and also includes an input shaft 110, an odd-numbered countershaft 13, an even-numbered countershaft 14 arranged in parallel with the odd-numbered countershaft 13, The intermediate shaft 15 and the reverse layshaft 16 also include a ...

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Abstract

The invention relates to control methods for dual clutch transmissions, particularly to a control method for gear pre-selection for an uncombined shaft of a dual clutch transmission and aims at providing the method capable of guaranteeing economy and dynamic property requirements of shift points as well as whole drivability and comfort of a whole vehicle. The control method mainly comprises the steps of judging gears to be combined on a target shaft according to the whole acceleration and the current operating gear; calculating time T required for arriving at actual shaft points of pre-selected gears; determining time T1 required for completing combination of the pre-selected gears according to the rotating speed of the target shaft; determining time T2 required for completely finishing the combination of the pre-selected gears by a synchronizer according to the position of the synchronizer; determining a safety time factor T3 according to the T1, adding the T2 and the T3 together, and if the sum is equal to the T, commanding the synchronizer to begin to execute combination of the pre-selected gears.

Description

technical field [0001] The present invention relates to a control method of a dual-clutch transmission, in particular to a control method for performing gear position preselection on an uncoupled shaft for a dual-clutch transmission. Background technique [0002] The transmission is a very important part of the modern transmission system. In order to improve the efficiency of the transmission system, a lot of research and development work has been carried out recently. With the development of modern control technology, a considerable part of the development work revolves around dual-clutch transmissions. The gears of the dual clutch transmission are similar to those of a normal manual transmission. The gears in each gear set are arranged on their own shafts and can rotate freely around the shafts. There is a synchronizer next to the gears. The synchronizer can selectively mesh with gears of different gears. Dual clutch transmission. For automatic shifting, the shifting of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/04F16H59/48
Inventor 徐姗刘丽萍李小锋刘天信曾开莲
Owner HEFEI CHANGAN AUTOMOBILE
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