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Method for controlling AT (automatic transmission) difference value gear shifting process

A technology of gear shifting rules and control methods, which is applied to transmission control, components with teeth, belts/chains/gears, etc., and can solve problems such as increased workload of calibration personnel

Inactive Publication Date: 2011-06-22
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this way, with the increase in the number of shift maps, the workload of the calibration personnel will also increase greatly.

Method used

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  • Method for controlling AT (automatic transmission) difference value gear shifting process
  • Method for controlling AT (automatic transmission) difference value gear shifting process
  • Method for controlling AT (automatic transmission) difference value gear shifting process

Examples

Experimental program
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Embodiment Construction

[0018] Further illustrate the present invention below in conjunction with accompanying drawing:

[0019] figure 1 It is the shifting MAP map (that is, the shifting rule map), in which ED_12, ED_23, ED_34, ED_43, ED_32, and ED_21 respectively represent the shift from first gear to second gear, second gear to third gear, third gear to fourth gear, and fourth gear in the economic mode. Shift down to third gear, down from third gear to second gear, and down from second gear to one gear. In the map, each gear shift curve can be displayed according to the difference of line shape.

[0020] figure 2 It is a graph showing the difference between the driving factor (Dr) and the load factor (Ld) between the economy shift map (D mode), the power shift map (S mode), and the load shift map (L mode). to combine figure 2 , image 3 and Figure 4 , the inventive method is described as follows:

[0021] In the first step, the A shift map is obtained by making a difference between the ec...

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PUM

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Abstract

The invention discloses a method for controlling an AT (automatic transmission) difference value gear shifting process. A drive factor (Dr) which reacts driving requirement in real time and a loading factor (Ld) which reacts the loading condition in real time are added, a difference value of the driving factor and the loading factor among an economic gear shifting chart (pattern D), a motive gear shifting chart (pattern S) and a loading gear shifting chart (pattern L) is carried out, thus a power shifting map is changed as the changes of the driving factor and the loading factor in real time. Through adopting a difference value between Dr, Ld and the pattern D, the pattern S as well as the pattern L by the gear shifting process, a gear shifting line in the gear shifting map is regulated to be adaptive to the driving condition in real time according to the actual driving condition, the calibration is calibrated through calibrating the basic pattern D, pattern S and pattern L gear shifting charts and calibrating parameters which influence the Dr value and the Ld value by a calibration engineer, and the calibration process can be simplified.

Description

technical field [0001] The invention belongs to the shift control technology of an automobile transmission, and in particular relates to a method for controlling the shift schedule of a vehicle by adopting a difference value method. technical background [0002] The AT transmission (abbreviation for Automatic Transmission) is based on the planetary gear set, and the transmission ratio is changed by switching between the sun gear, the outer ring and the gear frame in the planetary gear set. The AT transmission uses a hydraulic torque converter for power transmission, so the AT transmission has the characteristics of small impact and stable operation when shifting gears. The automatic transmission system needs to obtain vehicle driving state parameters, driver intentions, road environment information, and experience information of experienced drivers and relevant experts to make shift decisions. The shifting of the automatic transmission is based on the above information and ...

Claims

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Application Information

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IPC IPC(8): F16H59/44F16H59/50F16H59/68
Inventor 叶腾平张学勇王鑫汤春艳王占鑫
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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