Wet-type double-clutch gear shifting control method and system

A technology of wet dual clutch and control method, which is applied in transmission control, mechanical equipment, design optimization/simulation, etc. It can solve the problems of long research and development cycle, inability to quickly improve clutch shifting quality, and high manufacturing cost of transmission structure.

Active Publication Date: 2021-02-26
NINGXIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a wet dual clutch shift control method and system to solve the problems of high manufacturing cost of cha

Method used

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  • Wet-type double-clutch gear shifting control method and system
  • Wet-type double-clutch gear shifting control method and system
  • Wet-type double-clutch gear shifting control method and system

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Embodiment approach

[0078] Based on the wet dual clutch shift control method provided by the present invention, as an optional embodiment of the present invention, it specifically includes the following steps:

[0079] figure 2 The flow chart of the wet dual clutch shift control method provided by the present invention, such as figure 2 shown.

[0080] Step 1, collect vehicle running status information and vehicle body attribute information.

[0081] The vehicle running state information includes: engine speed, transmission output shaft speed, wheel speed, two clutch oil pressures; the vehicle attribute information includes: engine nominal torque, vehicle mass, engine and its flywheel equivalent moment of inertia, Moment of inertia of the driving end of the clutch, equivalent moment of inertia of the input shaft, moment of inertia of the output shaft, equivalent moment of inertia of the vehicle, transmission ratio of each gear, transmission ratio of the final drive, effective radius of the wh...

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Abstract

The invention relates to a wet-type double-clutch gear shifting control method and system. The control method comprises the steps of collecting vehicle running state information and vehicle attributeinformation in real time; establishing a clutch torque estimation model by using a vehicle longitudinal kinetic equation; correcting the clutch torque estimation model by adopting an extended Kalman filter, determining the torque transmitted by the clutch during gear shifting, and dividing the engagement process of the clutch during gear shifting into three stages; respectively estimating frictioncoefficients of the three stages by using a recursive least square method; calculating the dynamic friction coefficient of the clutch during gear shifting by using a Seebeck friction model; optimizing the torque transmitted by the clutch during gear shifting by adopting a model prediction control method, determining the optimal torque of the clutch during gear shifting, and controlling the engagement of the clutch by reversely deducing the clutch oil pressure through a pressure torque pulse spectrogram in combination with the dynamic friction coefficient. The gear shifting quality of the clutch can be rapidly improved through the control method without changing the structure of the transmission.

Description

technical field [0001] The invention relates to the field of automatic transmission control of automobiles, in particular to a wet double clutch shift control method and system. Background technique [0002] With the continuous development of automotive electronic control technology, dual-clutch automatic transmission has become the choice of more and more users, and its shift control is still a research hotspot. Limited by the structure and working principle of the dual clutch, the torque of the two clutches will inevitably overlap during the entire shifting process. When the torque distribution between the two clutches is unreasonable, the shifting quality will be affected. In order to solve this problem, there have been precedents in the industry to improve the shift quality by changing the structure of the transmission or optimizing the friction material. However, these methods starting from the hardware will increase the design and manufacture of the dual clutch transmi...

Claims

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Application Information

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IPC IPC(8): G06F30/15G06F30/20F16H61/02F16H61/04G06F17/11
CPCG06F30/15G06F30/20F16H61/02F16H61/04G06F17/11F16H2061/0459Y02T90/00
Inventor 郝洪涛马辉韩涛
Owner NINGXIA UNIVERSITY
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