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RN and DN gear shifting control strategy for automatic transmission

An automatic transmission and shift control technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve the problems of jitter shock, no automatic transmission control, imperfect control strategy, etc. requirements, saving development costs, and reducing the effect of matching difficulty

Inactive Publication Date: 2016-01-20
HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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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 solve the problem that the existing technology does not control the gear shifting of the automatic transmission RN and DN according to the turbine speed, or the control strategy is not perfect, resulting in obvious vibration impact on some models with soft powertrain suspensions question

Method used

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  • RN and DN gear shifting control strategy for automatic transmission
  • RN and DN gear shifting control strategy for automatic transmission
  • RN and DN gear shifting control strategy for automatic transmission

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Embodiment Construction

[0019] The specific implementation mode of the present invention is described in conjunction with the accompanying drawings. When the oil temperature of the transmission is greater than 0°C, it is a normal temperature working condition. The pressure holding time can better delay the release speed of hydraulic oil in the clutch;

[0020] When the TCU recognizes the change of the gear position signal, it quickly controls the main pressure regulating solenoid valve to increase the pressure of the main oil circuit of the hydraulic system, and the oil pressure of the main oil circuit of the transmission is increased to increase the oil pressure of the hydraulic oil in the clutch. Prepare for slow oil draining; the pressure increase of the main oil circuit is completed by the main pressure regulating solenoid valve to control the leakage of the main oil circuit. The time for increasing the oil pressure is less than or equal to 50ms. The pressure value is increased to 1.5 times of th...

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Abstract

The invention relates to a gear shifting control strategy for an automatic transmission, in particular to an RN and DN gear shifting control strategy for the automatic transmission. The RN and DN gear shifting control strategy aims at solving the problems that in the prior art, RN and DN gear shifting for the automobile transmission is not controlled according to the rotating speed of a turbine, or a control strategy is imperfect, and therefore obvious shake impact occurs to some vehicle types with soft power assembly suspensions. The RN and DN gear shifting control strategy is specially characterized in that at room temperature, a main pressure regulating electromagnetic valve is controlled to increase the pressure of a main oil path, and the oil pressure of the main oil path is increased to 1.5 to 2 times of an initial oil pressure within 50 ms; and staged oil drainage control is conducted on a clutch electromagnetic valve according to the rotating speed of the turbine. The garage moving gear shifting comfort can be greatly improved, and the gear shifting quality score can be increased to more than 7.5 from 6.5 ordinarily.

Description

technical field [0001] The invention relates to a gear shift control strategy of an automatic transmission, in particular to an RN and DN gear shift control strategy of an automatic transmission, and belongs to the technical field of automatic transmission control. Background technique [0002] At present, the development of automatic transmissions in China is very rapid, and in the process of shifting gears in the past, AT vehicles did not control the change process of the turbine speed when shifting gears from R and D to N. When it is fast, there will be shifting shocks such as jitter, which will affect the quality of shifting and driving comfort. Because the existing technology does not have RN, DN control strategy, or the control strategy is not perfect, some powertrain mounts are soft There are obvious jitter impacts on the model of the car, which has a great impact on the driving experience of the vehicle, and also increases the difficulty of matching the powertrain mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/06
CPCF16H61/065F16H2061/0481
Inventor 丁帮伟卢洪英赵志旭丁麟王惠李延斌夏洪彬辛海霞方立辉刘宪军沙洲
Owner HARBIN DONGAN AUTOMOTIVE ENGINE MFG CO LTD
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