Single-motor and four-wheel-drive electric vehicle starting and running control method

Abstract

The invention discloses a single-motor and four-wheel-drive electric vehicle starting and running control method. An electric vehicle comprises a vehicle control unit and a driving motor; one end of the driving motor is connected with a front drive speed reducer through a front clutch; the other end of the driving motor is connected with a rear drive speed reducer through rear front clutch; the front drive speed reducer is connected with front wheels; and the rear drive speed reducer is connected with rear wheels. The single-motor and four-wheel-drive electric vehicle starting and running control method comprises the following steps that the vehicle control unit controls the starting of the electric vehicle according to the actual load situation of the electric vehicle; and after starting,the vehicle control unit controls running modes of the electric vehicle according to the actual load situation, wherein the running modes comprise a front wheel and rear wheel simultaneous driving mode, a front wheel driving mode and a rear wheel driving mode. According to the single-motor and four-wheel-drive electric vehicle starting and running control method, the optimized control of vehiclepower can be effectively reduced, the total weight and cost of the vehicle are greatly reduced, enough power can be preferably transmitted to road surfaces, and the accelerating and off-road capability of the vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method for controlling the starting and running of an electric vehicle driven by a single motor with four wheels. Background technique [0002] An electric vehicle is a vehicle powered by an on-board power supply and driven by a motor to drive the wheels. An electric vehicle is an environmentally friendly vehicle. It uses electricity instead of petroleum as its main power source. It has the characteristics of low carbon emissions and environmental friendliness. It has the advantages of traditional internal combustion engines in alleviating the energy crisis, making full use of renewable energy, and reducing greenhouse gas emissions. The incomparable advantages of cars. However, existing electric vehicles usually adopt a single-axle dual-wheel drive mode. The main power of the vehicle is mainly concentrated on the front or rear wheels as the driving wheels, which can ...

AI Technical Summary

Problems solved by technology

However, existing electric vehicles usually adopt a single-axle dual-wheel drive mode. The main power of the vehicle is mainly concentrated on the front or rear wheels as the driving wheels, which can easily cause uneven force on each wheel and affect the acceleration and off-road capabilities of the vehicle. Weaker, the safety of vehicle handling is low. In addition, the existing four-wheel drive mode of electric vehicles usually adopts a dual-motor drive system, which has a high weight and cost of the vehicle, and cannot flexibly realize two-wheel drive during starting and driving. Switching between four-wheel-drive and four-wheel-drive modes is likely to cause energy waste

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