Torque control method for artificial refueling of electric vehicles before driving to creep speed

Abstract

The invention relates to a torque control method for artificially refueling an electric vehicle before it reaches the creeping speed; specifically, when neither the brake pedal nor the accelerator pedal of the electric vehicle is stepped on, and the transmission gear is shifted to the forward gear or In the case of reverse gear, the electric vehicle is accelerating close to the creep target speed with the pre-set creep control scheme. At this time, if the accelerator pedal is artificially depressed, the torque of the driving motor will be controlled as follows: 1. When the car is running normally, calculate the torque required by the drive motor at this time by checking the torque table; 2. Compare the calculated torque with the torque of the drive motor corresponding to the creep control scheme at this time, and select the larger torque as the drive motor The actual torque; the invention can avoid the feeling of vehicle fatigue caused by the reduction of the required torque when the driver steps on the accelerator, so that the driving stability and comfort are good.

Description

Technical field: [0001] The invention relates to a torque control method of an electric vehicle, in particular to a torque control method when the electric vehicle is artificially refueled before driving to a creeping speed. Background technique: [0002] As a new energy vehicle, electric vehicles can solve the exhaust emissions caused by fuel combustion of traditional automobile engines. They have the advantages of low environmental pollution, low noise, and high efficiency. They are an important trend in the development of the transportation industry in the future. [0003] At present, there are many electric vehicle brands and models in the domestic market, but many manufacturers lack experience in new energy vehicle system matching and electronic control development, and insufficient technology accumulation, resulting in many models not having creeping functions. After the vehicle is powered on at high voltage, the transmission gear is shifted to the forward / reverse gear...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many electric vehicle brands and models in the domestic market, but many manufacturers lack experience in new energy vehicle system matching and electronic control development, and insufficient technology accumulation, resulting in many models not having creeping functions

After the vehicle is powered on at high voltage, the transmission gear is shifted to the forward / reverse gear, and the vehicle must be stepped on the accelerator to start walking after the brake pedal is released; or the vehicle performs poorly during creeping, prone to shaking and Frustration; or when the accelerator pedal is pressed when the vehicle is approaching the creeping target speed, there will be a feeling of vehicle fatigue, which is not conducive to driving

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