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A shift correction control method for automatic transmission to improve vehicle emergency braking performance

A technology of automatic transmission and emergency braking, applied in the direction of control devices, etc., can solve problems such as reducing the safety of vehicle driving, and achieve the effect of improving braking performance, strong engineering applicability, and reducing performance parameters.

Active Publication Date: 2018-06-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Drivers have different manipulation intentions in the process of driving the vehicle. When emergency braking is required in an emergency situation, the basic shift control method of automatic transmission is set according to the driving intention of the vehicle at a uniform speed, and it is impossible to take corresponding actions according to the driving intention of emergency braking. Shift control strategies and shift execution methods to meet the current required gear and shift execution operations, resulting in reduced vehicle driving safety

Method used

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  • A shift correction control method for automatic transmission to improve vehicle emergency braking performance
  • A shift correction control method for automatic transmission to improve vehicle emergency braking performance
  • A shift correction control method for automatic transmission to improve vehicle emergency braking performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Embodiment: This embodiment uses the control method of the present invention to perform emergency braking automatic transmission shift correction control on a certain type of vehicle. The vehicle parameters of this type of vehicle are as follows:

[0038] Curb weight: 1600kg; transmission type: 5-speed dual-clutch transmission; drag coefficient: 0.4; rolling resistance coefficient: 0.018; windward area: 2m2; transmission efficiency: 0.9; The transmission ratio corresponding to 5: 3.615, 2.053, 1.370, 1.031, 0.837; the conversion coefficient of rotating mass corresponding to gear 1-5: 1.34, 1.14, 1.08, 1.05, 1.04.

[0039] The steady-state torque characteristic curve obtained from the engine test data is as follows: figure 2 As shown in , where engine speed is the engine speed, throttle is the throttle opening, and engine torque is the engine torque, the basic power shift curve of the transmission is calculated according to the vehicle parameters and the characteristic ...

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Abstract

The invention discloses an automatic transmission gear shifting amendment control method for improving vehicle emergency braking performance. The automatic transmission gear shifting amendment control method is characterized in that when a vehicle provided with an automatic transmission is subjected to emergency braking, through gear amendment of the automatic transmission and rotating speed adjustment and the braking torque characteristic of an engine, the braking distance during vehicle emergency braking is shortened, and abrasion of a braking system is reduced.

Description

technical field [0001] The invention relates to a control method for automatic gear shifting of a vehicle, in particular to a gear shift correction control method for an automatic transmission that improves the emergency braking performance of a vehicle. Background technique [0002] Automatic shifting control technology is the key technology of vehicle shifting control. Automatic shifting control mainly includes single-parameter, two-parameter, three-parameter, and even four-parameter basic shift control methods to improve fuel economy and smooth shifting sex. [0003] Drivers have different manipulation intentions in the process of driving the vehicle. When emergency braking is required in an emergency situation, the basic shift control method of automatic transmission is set according to the driving intention of the vehicle at a uniform speed, and it is impossible to take corresponding actions according to the driving intention of emergency braking. The gear shift contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/11B60W50/00
CPCB60W10/06B60W10/11B60W50/00B60W2050/0014B60W2050/0043B60W2510/0638B60W2510/1005B60W2710/0644B60W2710/1005
Inventor 夏光施信信谢海闫瑞琦郑友滑杨莹郭东云杜克邹斌
Owner HEFEI UNIV OF TECH
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