Single-pedal control method for urban low-speed vehicle following road condition of pure electric vehicle

Abstract

The invention provides a single-pedal control method for the urban low-speed following road condition of a pure electric vehicle. The single-pedal control method comprises the following steps: (1) a whole vehicle control system judging that a current vehicle enters a sliding working condition according to an accelerator pedal, a brake pedal and a vehicle speed signal; (2) the whole vehicle controlsystem calculating the target braking force of the whole vehicle according to the vehicle speed and the set sliding recovery strength grade, and at the moment, a driving motor can output a negative torque Tn for braking energy recovery; (3) the vehicle control system calculating the acceleration value of the vehicle at the moment in real time, and when the driver judges that the acceleration degree is too small in the vehicle following process, an accelerator pedal can be stepped on; at the moment, the whole vehicle control system judging whether to stop outputting the negative torque Tn or not according to the opening degree alpha of the accelerator pedal. According to the method, the better driving feeling and the better whole vehicle economy of the pure electric vehicle in the processof loosening / stepping on the accelerator pedal under the urban low-speed vehicle following road condition are achieved, and the driving feeling consistency is improved.

Description

technical field [0001] The invention belongs to the technical field of pure electric vehicles, and in particular relates to a single-pedal control method for pure electric vehicles in urban low-speed following road conditions. Background technique [0002] With the increasing emphasis on energy security and environmental protection, countries have become more and more strict on vehicle emissions. Reducing dependence on energy and realizing energy conservation and emission reduction has become an urgent problem to be solved for the sustainable development of the world economy. Under the background of traditional trucks polluting the environment, urban traffic restrictions, and low efficiency, the new energy vehicle industry has ushered in a new opportunity for development. [0003] As one of the important emerging market segments, the zero-pollution and zero-emission characteristics of pure electric logistics vehicles are more in line with the needs of economic development. ...

AI Technical Summary

Problems solved by technology

In the driving technology of traditional cars, the driver is required to frequently step on the accelerator and brake pedals in this low-speed car-following condition to realize the low-speed car-following requirement, which is likely to cause driver fatigue

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