Dual-clutch automatic speed transmission synchronizer and self-adapting control method for gear switch

An automatic transmission and adaptive control technology, applied in the field of control, can solve problems affecting the service life of the synchronizer, instantaneous impact, etc.

Inactive Publication Date: 2008-04-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the strategy of engaging the synchronizer of the next gear immediately according to the movement trend of the vehicle after the gear shift is completed. Since the speed of the vehicle changes i...

Method used

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  • Dual-clutch automatic speed transmission synchronizer and self-adapting control method for gear switch
  • Dual-clutch automatic speed transmission synchronizer and self-adapting control method for gear switch
  • Dual-clutch automatic speed transmission synchronizer and self-adapting control method for gear switch

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Embodiment Construction

[0086] Please refer to the accompanying drawings for a further description of the present invention.

[0087] As shown in Figure 1, the present invention provides a kind of adaptive control method of double-clutch automatic transmission synchronizer and gear switching, the steps of this method are:

[0088] 1) Design the torque mathematical model of the target vehicle engine;

[0089] 2) Design the target vehicle gear shift schedule;

[0090] 3) Determine the control curve of the synchronizer according to the shift schedule;

[0091] 4) Judging whether the throttle opening a is greater than the throttle threshold A;

[0092] 5) If yes, implement the control mode of rapid acceleration;

[0093] If not, implement the cycle driving mode control mode.

[0094] Wherein, A represents the threshold value of the throttle opening of the engine, which is generally taken as 30%.

[0095] In order to make the developed control method representative, the structure diagram of the 5-spe...

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Abstract

The adaptive control process of a double-clutch automatic derailleur synchronizer and gear shifting is that the torque mathematical model of the target car motor is designed; the control curve of synchronizer is determined according to the program of gear shifting rule; the fact whether the opening a of an accelerograph is greater or less than the accelerograph valve A is estimated; if the opening a of the accelerograph is greater than the accelerograph A, the control mode of operating mode of urgent acceleration is actualized; if the opening a of the accelerograph is less than the accelerograph A, the control mode of operating mode of cyclic running is actualized. The invention has the advantages that the control rule of synchronizer and gear shifting of various work conditions can be in selfadaptive chosen in real time according to the degree of the opening of the accelerograph, the control rule can make sure that the rotate speed of a DCT gear is in safe range when the car is accelerated quickly, and that the times of separation and joint of synchronizer is reduced when the cyclic operating mode is actualized, which saves energy consumption and prolongs the service life of parts.

Description

technical field [0001] The invention relates to a control method, in particular to a double-clutch automatic transmission synchronizer and an adaptive control method for shifting gears. Background technique [0002] The main goal of dual clutch transmission (Dual clutch transmission, referred to as DCT) synchronizer and gear switching control is to minimize the number of times of separation and engagement under the premise of correctly realizing its corresponding functions. [0003] It can be seen from the working principle of DCT that DCT adopts the method of pre-joining the synchronizer. But when the synchronizer starts to pre-engage, there is no fixed control method at present. At present, the strategy of engaging the synchronizer of the next gear immediately according to the movement trend of the vehicle after the gear shift is completed. Since the speed of the vehicle changes in a relatively large range during driving, this will inevitably lead to frequent engagement o...

Claims

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Application Information

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IPC IPC(8): F16H59/00F16H59/02F16H59/14F16H59/36F16H61/00G05B13/02
Inventor 杨伟斌吴光强钱向阳李一民黄明礼
Owner TONGJI UNIV
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