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Method and device for controlling torque request of automatic transmission

An automatic transmission and torque request technology, applied in the field of vehicles, can solve the problems of high risk of vehicle driving, acceleration, etc., and achieve the effect of improving safety

Active Publication Date: 2021-04-20
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if the automatic transmission requests too much torque from the engine, the vehicle will produce undesired acceleration under the action of the excessive torque, resulting in a high risk of driving the vehicle.

Method used

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  • Method and device for controlling torque request of automatic transmission
  • Method and device for controlling torque request of automatic transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0095] For the first implementation:

[0096] Step A1: Determine whether the value of the automatic torque request is greater than the torque limit corresponding to the target gear.

[0097] Step B1: When the value of the automatic torque request is not greater than the torque limit, record the first duration of the automatic transmission sending the automatic torque request to the engine.

[0098] Step C1: When the first duration reaches a preset first threshold, control the automatic transmission to stop sending the automatic torque request.

[0099] The preset first threshold is a preset value representing the duration of the engine's continuous output torque, generally slightly longer than the average duration of gear shifting, and is used to limit the duration of the automatic torque request sent by the automatic transmission to the engine to avoid Undesired acceleration of the vehicle due to an automatic torque request for too long.

[0100]In practical applications, t...

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Abstract

Embodiments of the present invention provide a method and device for controlling the torque request of an automatic transmission. When the automatic transmission is controlled to send an automatic torque request to the engine, the automatic torque request is obtained, and it is judged whether the value of the obtained automatic torque request is greater than the driving torque request. The value of the driving torque request is the torque request obtained according to the driver's operation. When the value of the automatic torque request is greater than the value of the driving torque request, the torque limit corresponding to the target gear is obtained. According to the value of the automatic torque request and Torque limit, which controls the automatic transmission to send an automatic torque request. The above technical solution avoids the undesired acceleration of the vehicle due to the excessive torque acting on the vehicle when the automatic transmission requests too much torque from the engine, and improves the safety of the driver during driving.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method and device for controlling the torque request of an automatic transmission. Background technique [0002] Automatic transmission is a transmission device that can automatically shift gears according to the vehicle speed and accelerator opening. In the process of shifting, in order to make the engine speed adapt to the speed corresponding to the target gear faster, the automatic transmission needs to continuously send torque requests to the engine until the end of the shift, thus shortening the shift time. time, improving shift performance. [0003] However, if the automatic transmission requests too much torque from the engine, the vehicle will experience undesired acceleration under the action of the excessive torque, resulting in a high risk of driving the vehicle. Contents of the invention [0004] The technical problem to be solved by the present invention is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/14F16H61/18
CPCF16H59/14F16H61/18
Inventor 曾艾黄洪飞
Owner SAIC MOTOR