A motor torque following method when an electric vehicle exits a stationary slope

Abstract

The invention aims to provide a motor torque following method when an electric vehicle exits a standing slope, which makes the response of the electric vehicle faster and starts more smoothly. The method of the invention comprises the following steps: (1) detecting the actual standing slope torque of the automobile when the automobile is currently stationed on the slope; (2) detecting the throttleopening percentage when the driver presses the throttle; (3) according to the sum of the actual standing slope torque and the torque value obtained by the throttle opening percentage when the automobile is currently stationed on the slope, as the motor driving torque value currently requested; (4) outputting the torque according to the motor drive torque value according to the current request; (5) When the throttle opening percentage reaches 100% or 0%, exiting the torque following mode, and the subsequent current motor drive torque request is outputted according to the normal torque output.The invention can be applied to the automobile control field.

Description

technical field [0001] The invention relates to the field of new energy vehicle control, in particular to a motor torque following method when an electric vehicle exits a parking slope. Background technique [0002] In the existing technology, parking on the slope has been one of the standard functions of new energy vehicles. When the existing electric vehicle is on the slope, when the driver steps on the accelerator to apply for exiting the parking torque, there are two ways to output the motor drive torque. The first method is: the motor needs to wait for the motor driving torque request to be greater than the actual parking torque before exiting the parking slope mode, execute the motor driving torque request of the vehicle controller, and thus enter the motor driving mode to drive the electric vehicle to run; the second method The method is: the moment the driver steps on the accelerator, the vehicle exits the parking slope mode, and the motor outputs the motor drive req...

AI Technical Summary

Problems solved by technology

However, the first method has the following disadvantages: different vehicle loads and different parking slopes require different actual parking torques, and the greater the actual parking torque, the longer the waiting time, which affects the driving experience; and When the actual on-slope torque is greater, the driver needs to step on the accelerator deeper. Then, when the driver steps on the accelerator, there will be a driving blank period for a period of time, which affects the response time of the vehicle and further affects the driving experience.

In the second method, when exiting the parking slope, the current motor torque request may be smaller than the actual parking torque, causing the vehicle to roll back when exiting the parking slope, affecting driving safety

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