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Shift coordination control method for wet dual-clutch automatic transmission

A technology of wet dual clutch and automatic transmission, which is applied in the direction of transmission control, elements with teeth, belt/chain/gear, etc. It can solve the problem of not mentioning the specific method of determining the shift command and not considering the influence of shift control, etc. problems, to achieve the effect of optimizing the shift process control, good power transmission, and prolonging the life of the clutch

Active Publication Date: 2019-03-12
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing shift coordination control method of dual-clutch automatic transmission does not mention the specific method of determining the shift command, and does not consider the influence of real-time changes in the power drive form on the shift control in the calculation of the shift type.

Method used

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  • Shift coordination control method for wet dual-clutch automatic transmission
  • Shift coordination control method for wet dual-clutch automatic transmission
  • Shift coordination control method for wet dual-clutch automatic transmission

Examples

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Embodiment Construction

[0056] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. A shift coordination control method for a wet dual-clutch automatic transmission, characterized in that the specific control steps are as follows:

[0057] Step 1: Calculate in real time and determine to send the order of removing and engaging gears to the selection and shifting control module;

[0058] Step 2: Calculate in real time and determine to send the control clutch command to the clutch control module;

[0059] Step 3: Calculate and determine the engine control request to the engine control module in real time.

[0060] The step 1 also includes the following steps:

[0061] Step 1a: processing the gear position request to determine whether to shift gears;

[0062] Step 1b: Calculate the required gear on each axis;

[0063] Step 1c: Calculate the target gear position command to remove and engage the gear.

[0064] Where step 1a is j...

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Abstract

The invention relates to a gear-shifting coordination control method for a wet double-clutch automatic speed changer. The method is characterized by specifically comprising the following control steps that firstly, calculation is conducted in real time, and neutral position and gear engaging commands are determined and sent to a gear selecting and shifting control module; secondly, calculation is conducted in real time, and clutch control commands are determined and sent to a clutch control module; and thirdly, calculation is conducted in real time, and engine control requests are determined and sent to an engine control module. The method is based on the needed gear of a driver, the vehicle power state and the speed changer gear-shifting state, a current target gear is calculated, the gear-shifting control timing sequence for reaching the target gear is determined, and corresponding gear selecting and shifting actions and clutch actions are completed by the gear selecting and shifting control module and the clutch control module based on the commands. Meanwhile, judgment is made based on the calculated gear-shifting type and the timing sequence, and the engine control requests are sent.

Description

technical field [0001] The invention relates to a shift coordination control method for a wet dual-clutch automatic transmission, which belongs to the field of automatic transmission control. Background technique [0002] The dual-clutch transmission device includes two sets of transmissions that can be regarded as independent, and each set of transmissions includes a clutch, transmission input shaft and a set of gear ratio devices. Each transmission obtains torque through connection with the engine. At the output end, they may share an output shaft to transmit torque to the wheels, or output to a common driven gear through a gear mechanism, and then connect to the output shaft. [0003] The wet dual-clutch automatic transmission control software can realize the automatic shift process based on the input of the driver's accelerator, brake and vehicle speed signals. During the shifting process, through the switching of the two clutches, the shifting without power interruptio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04
CPCF16H61/0403F16H2061/0407
Inventor 马艳熊杰张广辉庞学文
Owner CHINA FIRST AUTOMOBILE
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