Method for controlling repeated gear engagement in DCT (dual clutch transmission) synchronizer gear engaging process

A control method and transmission technology, applied in the direction of mechanical control device, transmission device control, control/adjustment system, etc., can solve problems such as inability to shift gears or shift shock, synchronous ring wear, unsuccessful gear shifting, etc., and achieve gear shifting Suppleness, impact avoidance, and more effective gear shifting

Inactive Publication Date: 2014-11-19
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the failure of gear shifting and the wear of the synchronous ring caused by the failure of gear shifting or the impact of gear shifting in the case of "tooth-to-tooth" in the gear shifting process of the DCT transmission, thus proposing a A repeated gear-shifting strategy to solve the unsuccessful gear-shifting or the impact of shifting gears

Method used

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  • Method for controlling repeated gear engagement in DCT (dual clutch transmission) synchronizer gear engaging process
  • Method for controlling repeated gear engagement in DCT (dual clutch transmission) synchronizer gear engaging process
  • Method for controlling repeated gear engagement in DCT (dual clutch transmission) synchronizer gear engaging process

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Embodiment Construction

[0020] Such as figure 1 It is shown that the gear sleeve 1 of the present invention is engaged with the synchronous ring 2 under the push of the shift fork, and at the same time, after the synchronous ring is synchronized with the engaging teeth 3, the gear sleeve 1 is then engaged with the engaging teeth to complete the entire gear shift process.

[0021] Such as Figure 2A It shows that when the gear sleeve of the present invention is engaged with the synchronizing ring, the gear sleeve 1 and the synchronizing ring 2 are "tooth-to-teeth"; Figure 2B It is because when the tooth cover engages the engaging teeth, the tooth cover 1 and the engaging tooth 3 "tooth-to-teeth" situation occurs. The present invention analyzes and studies the strategy of repeatedly shifting gears according to the above two situations.

[0022] Such as image 3 Shown is a PID algorithm block diagram of the variation of the shift fork force value with the change of the fork position feedback value ...

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Abstract

The invention provides a method for controlling repeated gear engagement in a DCT (dual clutch transmission) synchronizer gear engaging process. By the method, the problems that in a DCT gear shifting process, gear shifting cannot be realized or impact of gear shifting is caused under conditions that teeth face to each other, gear shifting fails and a synchronizer is worn are solved. In the method, a whole gear shifting process is divided into three stages comprising (1) a stage of approaching a synchronizing ring, (2) a synchronizing stage, and (3) a gear engaging stage after a gear sleeve is connected with connecting teeth. After the three stages are analyzed, the conditions that the teeth face to each other comprise the following two types of conditions: (1) teeth of the gear sleeve face teeth of the synchronizing ring; and (2) the teeth of the gear sleeve face the connecting teeth. The two types of conditions are analyzed, flexible gear engaging is realized and the synchronous ring is protected from being impacted by repeatedly engaging a gear, so that the service life of the synchronizing ring is prolonged, and the gear engaging success rate is increased.

Description

technical field [0001] The invention relates to a gear-engaging technology of a transmission synchronizer, in particular to a repeated gear-engaging method for controlling successful gear-engaging when the synchronizer is gear-to-tooth. Background technique [0002] During the shifting process of the DCT transmission, the gear shift fork is driven by the shift actuator to push the tooth sleeve closer to the synchronous ring and engage the upper synchronous ring so that it presses on the engaging teeth to achieve synchronization, and the shift fork continues to push the gear Set, to get closer to the engaging teeth, and finally the gear sleeve, synchronizing ring, and engaging teeth are completely engaged together, and then the entire shifting process is completed. In the design of the whole set of parts, in order to enable the three to engage better and reduce the shifting force, the tooth profiles of the gear sleeve, synchronizing ring, and engaging teeth are all made into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H63/32
CPCF16H61/0204F16H61/0403F16H2061/0425F16H2061/047
Inventor 冯川王银张学勇高海波
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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