Torque control method for artificial refueling before creeping speed of electric automobile

Abstract

The invention relates to a torque control method for artificial refueling before creeping speed of an electric automobile. The torque control method specifically includes the steps that under the conditions that a braking pedal and an accelerator pedal of the electric automobile are not treaded and the gear of a gearbox is engaged to the forward gear or the reversing gear, the electric automobileis accelerated to approach a target creeping speed according to a preset creeping control scheme, and at the moment, if the accelerator pedal is manually treaded, the torque of a driving motor is controlled as follows: 1, the currently required torque of the driving motor is calculated by checking a torque table under the normal driving condition of the electric automobile; and 2, the calculated torque and the driving motor torque corresponding to the creeping control scheme at the moment are compared, and the larger torque is selected as the actual torque of the driving motor. The torque control method can avoid the automobile weak feeling generated by reduced required torque when a driver treads an accelerator, so that 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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