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Synchronizer control method and control device in dual-clutch transmission

A technology of dual clutch and control method, applied in transmission control, components with teeth, belt/chain/gear, etc. Effect

Active Publication Date: 2020-08-04
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This disturbance is transmitted to the odd-numbered input shaft through the output shaft 2, and the disturbance is more obvious when the odd-numbered clutch is open, which causes the speed of the odd-numbered input shaft to fluctuate and cause noise

Method used

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  • Synchronizer control method and control device in dual-clutch transmission
  • Synchronizer control method and control device in dual-clutch transmission
  • Synchronizer control method and control device in dual-clutch transmission

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0053] The present application discloses a control method and a control device for a synchronizer in a DCT, so as to reduce the noise generated by the DCT during downshifting.

[0054] see figure 2 , figure 2 It is a flow chart of a method for controlling a synchronizer in a DCT disclosed in this application. The control method is applied to the DCT downshift process, specifically including:

[0055] Step S1: During the pre-synchronization phase, adjust the gear-engagement forc...

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Abstract

The invention discloses a control method and device for a synchronizer in a dual clutch transmission (DCT). According to the comparative result between the maximum rotational speed fluctuation value of a non-gear-engaging input shaft in unit time and a first rotational speed fluctuation threshold value and the comparative result between the maximum rotational speed fluctuation value of a gear-engaging input shaft in unit time and a second rotational speed fluctuation threshold value in the period from the gear-engaging starting moment to the synchronization stage completing moment in the downshift operation process, pre-synchronous stage gear-engaging force and synchronization stage gear-engaging force which are stored currently are adjusted dynamically, and noise generated in the next downshift process of the DCT can be reduced; and accordingly, the pre-synchronous stage gear-engaging force and synchronization stage gear-engaging force which are adopted in the downshift operation process are determined in the previous downshift process, and thus the noise generated by the DCT can be reduced.

Description

technical field [0001] The application belongs to the technical field of transmissions, and in particular relates to a control method and a control device for a synchronizer in a dual-clutch transmission. Background technique [0002] Dual-clutch transmission (DCT) is a kind of automatic transmission, which has become more and more favored by domestic and foreign automobile OEMs in recent years. DCT has the advantages of uninterrupted power during the shifting process, good shifting quality, and high transmission efficiency. It is one of the most popular automatic transmissions for automobiles. It is widely used not only in traditional internal combustion engine vehicles, but also in hybrid vehicles. figure 1 The structure of DCT is shown. [0003] Similar to the manual transmission (MT), the synchronizer is an important part of the DCT. Its function is to make the speed of the combination sleeve quickly equal to the speed of the gear that is about to be engaged, so that t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/04
CPCF16H61/02F16H61/04
Inventor 陈亮裴玲
Owner SAIC MOTOR