Control method and device for output torque of motor and whole vehicle controller

Abstract

The invention discloses a control method and device for output torque of a motor and a whole vehicle controller, and relates to the technical field of electric automobiles. The control method and device and the while vehicle controller aim to achieve the purpose that when a driver steps on a brake pedal of an electric automobile at first and steps on an accelerator pedal of the electric automobilewhile keeping stepping on the brake pedal, the motor is requested to output a torque value meeting the true demand of the driver. The method comprises the following steps that when the whole vehiclecontroller collects a brake pedal treading signal and collects an accelerator pedal treading signal while keeping the collected brake pedal treading signal, the whole vehicle controller acquires the current vehicle speed of the electric automobile and the treading depth of the accelerator pedal; the whole vehicle controller determines the first demand torque corresponding to the electric automobile according to the current vehicle speed and the treading depth; and when the first demand torque is the negative torque, the whole vehicle controller requests the motor to output the first demand torque. The method, the device and the whole vehicle controller are suitable for the process that the whole vehicle controller requests the motor to output the torque value meeting the requirement of thedriver.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and device for controlling output torque of a motor and a vehicle controller. Background technique [0002] With the continuous development of society and the continuous improvement of people's living standards, people's demand for cars is also increasing, and cars have become an indispensable part of people's daily life. For traditional cars, traditional cars can only send drive requests to the engine, that is, they can only request the engine to output positive torque. , when the accelerator pedal is stepped on again, the traditional car will control the motor output torque (positive torque) based on the stepping depth of the accelerator pedal, then multiply the required torque by a coefficient less than 1, and finally request the engine to output the multiplied coefficient the required torque. [0003] Different from traditional cars, electric vehicles can...

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Problems solved by technology

[0003] Different from traditional cars, electric vehicles can send driving requests to the motor or braking requests to the motor according to the depth of the accelerator pedal, that is, electric vehicles can request the motor to output positive torque or request the motor to output negative torque. Therefore, when the driver depresses the brake pedal first, and while depressing the brake pedal, then depresses the accelerator pedal, if the depressing depth of the accelerator pedal is small, the driver expects to send a braking request to the motor, that is, The motor is requested to output negative torque. At this time, if the motor is requested to output a negative torque multiplied by a coefficient according to the processing plan of the traditional car, the deceleration effect of the electric vehicle will be different from the deceleration effect expected by the driver, which will cause Affect the driver's driving experience and safety

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