Dynamic adjustment method and device for controlling torque output threshold of pure electric vehicle

Abstract

The invention discloses a dynamic adjusting method and device for controlling torque output threshold of full electric vehicle. The method comprises the following steps: obtaining a slope angle of the road on which the full electric vehicle is running; determining a vehicle dynamic adjusting level based on the slope angle, wherein the vehicle dynamic adjusting level is positively correlated with the slope angle; determining a first torque output threshold based on the vehicle dynamic adjusting level and the current rotating speed, wherein the first torque output threshold is positively correlated with the vehicle dynamic adjusting level and is negatively correlated with the current rotating speed; determining a second torque output threshold based on the vehicle dynamic adjusting level and the current large torque duration, wherein the second torque output threshold is positively correlated with the vehicle dynamic adjusting level and is negatively correlated with the current large torque duration; obtaining the current output threshold based on the first torque output threshold and the second output threshold, under the constraint conditions of the maximum torque output threshold and the minimum torque output threshold of the full electric vehicle. The dynamic adjusting method and device for controlling torque output threshold of full electric vehicle have the advantages of strong applicability, good safety, and the like.

Description

technical field [0001] The invention belongs to the technical field of automobile control, and in particular relates to a dynamic adjustment method and device for controlling the torque output threshold of a pure electric vehicle. Background technique [0002] With the development of technology, the application of pure electric vehicles is becoming more and more extensive. For the sake of safety, it is usually necessary to set a maximum value for the output torque value of the pure electric vehicle, which is called the output torque threshold. [0003] Currently, pure electric vehicles are usually preset with a single output torque threshold. However, the disadvantage of the single output torque threshold is that the value is fixed, so that the output torque threshold cannot be dynamically adjusted. At the same time, in the actual use of electric vehicles, this will bring some disadvantages. For example, when the output torque threshold is set to a small value, the pure el...

AI Technical Summary

Problems solved by technology

First of all, it leads to accidental damage to the motor or transmission of the pure electric vehicle, thereby reducing the life of the pure electric vehicle

Secondly, this will lead to waste of energy stored in the battery, and the mileage of the vehicle on a single charge will be reduced.

In the end, this can also lead to excessive vehicle acceleration and driving speed, which may cause safety hazards

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