Recovery torque control method and system and vehicle

Abstract

The invention discloses a torque recovery control method and system and a vehicle. The method comprises the steps: identifying whether one of special road conditions exists on a front road or not, wherein the special road conditions comprise n different types of road conditions, and the special road conditions represent road surfaces which can cause abnormal actions of a running vehicle; judging whether the vehicle is in a sliding condition; if it is identified that the front road has a special road condition and is in a sliding working condition, the current recovery torque is Tq current, Tq current is smaller than 0, based on the current recovery torque Tq current, the current vehicle is gradually increased to the preset recovery torque Tqi corresponding to the special road condition in the process of driving to the position of the special road condition, Tqi is larger than Tq current, and Tqi is smaller than or equal to 0; the preset recovery torques corresponding to the n different types of road conditions are sequentially defined as Tq1, Tq2... Tqi... Tqn, and i = 1, 2... n. According to the torque recovery control method, the total sliding energy recovery amount under specific road conditions and vehicle conditions is increased, corresponding potential safety hazards are eliminated, and the risk that the vehicle is out of control is avoided.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a recovery torque control method, system and vehicle. Background technique [0002] When a pure electric vehicle slides through the speed bump, the vehicle vacates in the air for a short time, and the ABS of the vehicle is activated due to energy recovery, which in turn leads to the exit of the energy recovery during coasting, causing the vehicle to run forward, which poses a certain safety risk. When a pure electric vehicle slides through puddles or sand pits, the adhesion of the vehicle tires decreases for a short time, and the ABS of the vehicle is activated due to energy recovery, which in turn leads to the withdrawal of energy recovery during taxiing, causing the vehicle to run forward, which poses a certain safety risk. When a pure electric vehicle slides from a road with a high adhesion coefficient (such as cement, asphalt) to a road with a low adhesion coef...

AI Technical Summary

Problems solved by technology

[0002] When a pure electric vehicle slides through the speed bump, the vehicle vacates in the air for a short time, and the ABS of the vehicle is activated due to energy recovery, which in turn leads to the exit of the energy recovery during coasting, causing the vehicle to run forward, which poses a certain safety risk

When a pure electric vehicle slides through puddles or sand pits, the adhesion of the vehicle tires decreases in a short period of time, and the ABS of the vehicle is activated due to energy recovery, which in turn leads to the withdrawal of energy recovery during sliding, causing the vehicle to run forward, which poses a certain safety risk

When a pure electric vehicle slides from a road with a high adhesion coefficient (such as cement, asphalt) to a road with a low adhesion coefficient (such as snow, icy roads), the adhesion of the vehicle tires decreases in a short period of time. Turn, there is a certain security risk

Images