Control method and device capable of preventing vehicle from sliding downwards on slope and electric vehicle

Abstract

The invention relates to a control method and device capable of preventing a vehicle from sliding downwards on a slope and an electric vehicle. The control method capable of preventing a vehicle from sliding downwards on a slope comprises the following steps of judging whether the current state of the vehicle meets the condition of preventing the vehicle from sliding downwards on the slope or not; if yes, according to the rotating speed of a motor and the opening degree of a brake pedal of the vehicle, obtaining a resultant moment of the vehicle; according to the resultant moment of the vehicle and a gravity moment of the vehicle, obtaining a target output torque for preventing the vehicle from sliding downwards on the slope; and controlling the motor to operate in a manner that the target output torque for preventing the vehicle from sliding downwards on the slope is used as a motor output torque, so that the vehicle is static. According to the control method disclosed by the invention, through judging whether the current state of the vehicle meets the condition of preventing the vehicle from sliding downwards on the slope or not, the vehicle is controlled to be prevented from sliding downwards on the slope in time, even a driver steps on the brake pedal by instinct when the vehicle is in the trend of sliding downwards on the slope, the effect of preventing the vehicle from sliding downwards on the slope is not influenced, the efficiency of controlling the vehicle so as to prevent the vehicle from sliding on the slope is improved, and the occurrence of a phenomenon that the vehicle slides on the slope is avoided.

Description

technical field [0001] The present disclosure relates to vehicle control technology, in particular, to a control method and device for preventing a vehicle from sliding downhill, and an electric vehicle. Background technique [0002] With the improvement of people's environmental awareness and the increase of energy pressure, the popularity of electric vehicles is gradually increasing, and the weight of the battery pack of electric vehicles increases the overall weight of electric vehicles to a certain extent. The phenomenon is more obvious than that of traditional cars. [0003] Therefore, in order to prevent slopes, electric vehicles usually adopt a certain anti-slope control method, which is realized by the Vehicle Control Unit (VCU). In the anti-slope control mode, when the state of the vehicle meets the expected conditions , the VCU calculates the target torque of the motor, and controls the motor to run with the target torque as the output torque. [0004] However, t...

AI Technical Summary

Problems solved by technology

[0004] However, the above method often cannot enter the anti-slope control mode in time when the vehicle actually needs to perform anti-slope control, and the efficiency is low, resulting in the inability to prevent the vehicle from slipping backwards in time, and there are potential safety hazards

Images