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Method for controlling gear shifting of two-gear mechanical automatic gearbox of pure electric automobile

A technology for automatic transmissions and pure electric vehicles, applied in transmission control, mechanical equipment, components with teeth, etc., can solve the problem of reducing the accuracy and reliability of the shifting process, the failure to complete the shifting operation, and affecting the output signal Accuracy and other issues, to achieve the effect of convenient control, reduced impact, and simple strategy steps

Active Publication Date: 2014-09-24
CHONGQING UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

However, due to objective factors such as ambient temperature and subjective factors such as the possibility that the car will not be used for a long time, it will inevitably lead to signal drift of the sensor, which will affect the accuracy of its output signal, which will reduce the shift process. Accuracy and reliability, even causing the shifting operation to fail to complete smoothly

Method used

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  • Method for controlling gear shifting of two-gear mechanical automatic gearbox of pure electric automobile
  • Method for controlling gear shifting of two-gear mechanical automatic gearbox of pure electric automobile

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with drawings and embodiments.

[0035] A method for controlling shifting of a two-speed mechanical automatic transmission for a pure electric vehicle, comprising a transmission control unit TCU, a shift motor for driving a shift actuator, and a displacement sensor for monitoring the position of a synchronizer sleeve during the shift process, The specific methods of shifting gears include:

[0036] 1) Wait for the shift signal, and turn to step 2 after receiving the shift signal);

[0037] 2) Enter the gear removal control, the TCU controls the gear shift motor to run, and enter step 3 after the gear removal is completed);

[0038] 3) The shift motor stops working, and the vehicle controller ECU controls the driving motor to adjust the speed. After the speed adjustment is completed, go to step 4);

[0039] 4) Enter gear shifting control, TCU controls the gear shifting motor to start running, TCU judg...

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Abstract

A method for shift control of a two-speed mechanical automatic transmission of a pure electric vehicle. When the car is shifted for the first time after each start, it not only uses the signal of the displacement sensor to judge whether the target gear is engaged, but also adds The locked-rotor signal of the shift motor is used to control, so as to judge whether the signal drift of the displacement sensor occurs, and calibrate its output value, so as to timely correct the numerical judgment range of whether the corresponding gear is in gear in the control program. It can diagnose the displacement sensor every time the vehicle is driven, and correct it in time after the signal drift occurs, so as to reduce the influence of the signal drift on the shifting process, so as to improve the accuracy and reliability of the entire shifting process sex.

Description

technical field [0001] The invention relates to the technical field of automobile automatic transmission control, in particular to a shift control method of a two-speed mechanical automatic transmission of an electric vehicle. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, the advantages of pure electric vehicles with no pollution and zero emissions are becoming more and more obvious. At the same time, with the development and progress of technology, the performance indicators of pure electric vehicles will be close to those of traditional vehicles, and the price of pure electric vehicles will be further reduced. It will surely become one of the main means of transportation in the future. As one of the core components of the pure electric vehicle drive train, the automatic transmission has also become the focus of research in the field of electric vehicles. [0003] At present, the power transmission mode of pure elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/02F16H61/32F16H63/42
Inventor 胡建军陈曦李涛吉毅
Owner CHONGQING UNIV
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