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Economic gear-shifting control method of automatic gearbox for non-road vehicle

A technology of automatic transmission and control method, which is applied in the field of economical shift control of automatic transmission of non-road vehicles, and can solve the problems of high labor intensity and low operation efficiency.

Inactive Publication Date: 2015-05-13
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a non-road vehicle automatic transmission economic shift control method to solve the problems of high labor intensity and low work efficiency due to frequent shifting of non-road vehicle operators

Method used

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  • Economic gear-shifting control method of automatic gearbox for non-road vehicle
  • Economic gear-shifting control method of automatic gearbox for non-road vehicle
  • Economic gear-shifting control method of automatic gearbox for non-road vehicle

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] 1. According to the rolling radius of the non-driving wheel, the rolling radius of the driving wheel, the speed of the non-driving wheel and the speed of the driving wheel, the slip rate of the driving wheel is obtained:

[0024] δ = v r - v f v r × 100 %

[0025] in, δ is the slip rate of the drive wheel; v f is the actual driving speed of the vehicle, that is, the vehicle speed corresponding to the rotational speed of the non-driving wheels; v r is the theoretical driving speed of the vehicle, that is, the vehicle speed corresponding to the rotational speed of the driving wheel; r f is the rolling radius of the n...

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Abstract

The invention relates to an economic gear-shifting control method of an automatic gearbox for a non-road vehicle, which is characterized in that speed, throttle opening and driving wheel slide rate are taken as the control parameters of automatic gear shifting, a mathematical model on the economic gear-shifting discipline of the automatic gearbox for the non-road vehicle is built, the economic gear-shifting speed of the vehicle is calculated as per the mathematical model, the best theoretical value on economic gear-shifting speed is calculated, and the best theoretical value is compared with hourly fuel consumption at the maximum travelling speed and that at the minimum steady travelling speed of various gears of the vehicle during actual travelling process so as to obtain the best economic gear-shifting speed of the vehicle under different driving wheel slide rates. Therefore, the problems of large labor strength and low operation efficiency caused by frequent gear shifting of non-road vehicle operators are solved.

Description

technical field [0001] The invention relates to an economical shift control method for an automatic transmission of a non-road vehicle. Background technique [0002] The operating environment and conditions of most off-road vehicles are relatively harsh. While manipulating the operating device, the driver also needs to manually shift gears frequently to meet the power performance and operating performance of off-road vehicles. Frequent shifting increases the labor intensity of the operator, distracts the attention and reduces the working efficiency. Therefore, it is of practical significance to realize the automatic transmission of non-road vehicles. [0003] At present, the automatic transmission technology commonly used in automobiles is mainly two-parameter or three-parameter shifting. The two-parameter shift uses vehicle speed and accelerator opening as control parameters, and the three-parameter shift uses vehicle speed, accelerator opening and acceleration as control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/19
Inventor 徐立友张静云周志立郭志强曹付义闫祥海张敏刘宗剑时辉
Owner HENAN UNIV OF SCI & TECH