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Gear shifting control method of automatic transmission based on forward road information

A technology of automatic transmission and control method, applied in the direction of transmission control, elements with teeth, belt/chain/gear, etc., can solve problems such as frequent shifting

Active Publication Date: 2019-01-04
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of frequent shifting during uphill or downhill in the existing automatic transmission shift control method, the present invention proposes an automatic transmission shift control method based on the road ahead information to improve vehicle fuel economy sex and drive

Method used

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  • Gear shifting control method of automatic transmission based on forward road information
  • Gear shifting control method of automatic transmission based on forward road information
  • Gear shifting control method of automatic transmission based on forward road information

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Embodiment Construction

[0037] The present invention is described in detail below in conjunction with accompanying drawing:

[0038] figure 1 It is a flow chart of the automatic transmission shift control method based on the road ahead information described in the embodiment of the present invention. Such as figure 1 As shown, a method for controlling shifting of an automatic transmission based on road ahead information provided in this embodiment includes the following steps:

[0039]This method includes two stages, namely the first stage and the second stage, wherein the first stage and the second stage are in a sequential relationship, that is to say, the second stage will be carried out after the first stage is completed, and the first stage refers to The entire stage with the top of the slope ahead, and the second stage refers to the entire stage with the bottom of the slope ahead;

[0040] The control process of the first stage, that is, the entire stage with a slope top ahead, is as follows...

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Abstract

The invention provides a gear shifting control method of an automatic transmission based on forward road information. According to the slope angles of a plurality of points within a forward set distance, the road signs of the plurality of points within the forward set distance, the slope angle at the current driving time of a vehicle and the road sign at the current driving time of the vehicle, the gear control of the automatic transmission in an upslope preparing process, an upslope process, a slope crest process, a downslope preparing process, a downslope process and a slope bottom process is realized, so that the functions of upshifting in advance before going up the slope, avoiding frequent gear shift in the upslope process, making the automatic transmission to be neutral in advance before going down the slope and maintaining an engine at certain braking force in the downslope process are realized, and the automatic transmission is in the optimal gear, so that the fuel economy andthe dynamic property of the vehicle are increased.

Description

technical field [0001] The invention belongs to the technical field of automobiles and relates to a shift control method of an automatic transmission, in particular to a shift control method of an automatic transmission based on road ahead information. Background technique [0002] When the vehicle is running, a reasonable gear of the automatic transmission can make the engine work in the low fuel consumption area as much as possible, improve the fuel economy of the vehicle, and also make the engine work in the high power area, improving the dynamic performance of the vehicle. Therefore, the gear position of the automatic transmission is a key factor affecting the fuel economy and power of the vehicle. At the same time, during the driving process of the vehicle, the road information ahead is constantly changing. If the road information is considered, the gear position of the automatic transmission will be more reasonable. Therefore, the electronic control unit of the automa...

Claims

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Application Information

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IPC IPC(8): F16H59/66F16H61/02
CPCF16H59/66F16H61/0213F16H2059/663F16H2059/666F16H2061/0227
Inventor 杨帅庞学文马燕蔡文文王超
Owner FAW JIEFANG AUTOMOTIVE CO
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