Electric automobile slope starting auxiliary control device

Abstract

The invention provides an electric automobile slope starting auxiliary control device, which comprises the following steps that in the slope starting process, a vehicle keeps still under the hydraulic braking force effect before an acceleration pedal is pedaled down; after an acceleration pedal is pedaled down, the driver requiring torque is increased along with the opening degree increase of the acceleration pedal; when the driver requiring torque is greater than the motor allowable long-time stalling torque, and the vehicle still cannot advance, the motor driving torque cannot be increased along with the driver requiring torque; the torque keeps unchanged; meanwhile, the hydraulic braking force is subjected to dynamic compensation control; the vehicle keeps still under the combined effect of the motor driving torque and the hydraulic braking force; when the driver requiring torque is greater than the vehicle running resistance, the motor driving torque is increased to be identical to the driver requiring torque so as to drive the vehicle to run. The control method provided by the invention has the advantages that no impact of the automobile in the starting process is ensured; the adverse influence on a motor is avoided.

Description

technical field [0001] The invention relates to an auxiliary control method for starting on a slope, in particular to an auxiliary control method for an electric vehicle starting on a slope. Background technique [0002] With regard to the auxiliary control method for electric vehicles starting on slopes, the main methods currently used include: applying anti-rolling torque after the brake pedal is released, and superimposing additional motor drive torque on the basis of the anti-rolling torque after depressing the accelerator pedal. The above additional motor driving torque is calculated according to the accelerator pedal opening. However, if the slope is too high, there will be two abnormal situations: the first one is that the motor drive torque is applied too fast, which will cause a starting impact and cause safety hazards; the second one is that the motor drive torque is applied too slowly, resulting in low speed and high torque The locked rotor phenomenon will cause ...

AI Technical Summary

Problems solved by technology

The system disclosed in Patent Document 2 relates to a slope assist control method for a hybrid vehicle when going uphill, but the main content is to judge whether the power source required for starting is provided by the motor or the engine through the SOC and the starting torque. It involves process control in the case of motor start control, and there is no countermeasure for motor stalling

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