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Shifting method for AMT (Automated Mechanical Transmission) automatic gearbox

A technology of automatic transmission and gear shifting method, which is applied to transmission devices, fluid transmission devices, and components with teeth, etc., can solve problems such as clutch control difficulties, and achieve the effects of shortening shift time and reducing shift impact

Active Publication Date: 2014-04-02
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present invention is to provide a shifting method of an AMT automatic transmission to solve the problem of difficult clutch control in the shifting process of the AMT automatic transmission

Method used

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  • Shifting method for AMT (Automated Mechanical Transmission) automatic gearbox
  • Shifting method for AMT (Automated Mechanical Transmission) automatic gearbox
  • Shifting method for AMT (Automated Mechanical Transmission) automatic gearbox

Examples

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Embodiment Construction

[0033] figure 1 It is a flow chart of the steps of the shifting method of the AMT automatic transmission according to an embodiment of the present invention. Such as figure 1 As shown, in the present embodiment, the shifting method of the present invention includes the following steps:

[0034] Step S101: The vehicle is turned on and starts to drive.

[0035] Step S102: During the driving process of the vehicle, the AMT automatic transmission is in any forward gear, judge whether it is necessary to shift gears to other forward gears according to the vehicle driving state parameters and the control signal, if it is necessary to shift gears, proceed to step 103 , otherwise repeat step S102.

[0036] Step S103: Determine the target gear to be shifted.

[0037] Step S104: According to the current vehicle speed and the gear ratio of the target gear, calculate the expected engine target speed Engine_TargetSPD when the clutch of the target gear is fully engaged.

[0038] Step S1...

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Abstract

The invention relates to a shifting method for an AMT (Automated Mechanical Transmission) automatic gearbox. The shifting method comprises the following steps A, during a driving process of a vehicle, judging whether shifting to other advancing gears or not according to a vehicle driving state parameter and an operation signal, if yes, executing step B, and if not, repeating step A; B, determining a target gear; C, calculating a target rotating speed of an engine according to a rate of the present vehicle speed to the gear speed of the target gear; D, judging whether the target rotating speed of the engine is greater than or equal to an idle speed or not, and if yes, executing steps E-G; E, maintaining the present rotating speed and using a shifting motor for retreating a present gear synchronizer to a neutral gear; F, controlling a gear selecting motor to act, and controlling the rotating speed of the engine to the target rotating speed of the engine when the gear selecting motor moves to the target gear position; G, controlling the gear selecting motor to act, shifting a target gear synchronizer to the target gear, cancelling the control on the rotating speed of the engine and finishing the gear shifting.

Description

technical field [0001] The invention relates to vehicle shift control technology, in particular to a shift method of an AMT automatic transmission. Background technique [0002] When the vehicle is shifting gears, the clutch control of AMT (Automated Mechanical Transmission) automatic transmission (or automatic mechanical transmission or electromechanical automatic transmission) is always a technical problem. In the process of AMT shifting, the clutch needs to be disengaged first, and after the synchronizer is engaged in the corresponding gear, the clutch must be combined again. However, the separation and engagement control of the clutch is very complicated. If the clutch separation and engagement speed is too slow, it is easy to cause serious wear of the clutch, and even cause the clutch to burn out due to overheating. Conversely, if the clutch separation and engagement speed is too fast, the vehicle's shifting impact will be severe, the quality of the vehicle's shifting ...

Claims

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Application Information

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IPC IPC(8): F16H59/08F16H61/14
CPCF16H59/44F16H61/0213F16H61/32F16H2059/746F16H2061/022F16H2061/326
Inventor 张俊祥陈勇罗大国刘文忠倪为吴成明冯擎峰
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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