Torque management control method of battery electric vehicle

Abstract

The invention discloses a torque management control method of a battery electric vehicle. Due to the fact that a vehicle control unit receives all status signals transmitted by a gear shifting mechanism, an accelerator pedal, a brake pedal, a motor controller and a battery controller, target demand torque of a vehicle is determined, a series of processing is performed on the target demand torque, the target demand torque subjected to the processing is output to the motor controller to control operation of a motor, and accordingly, the battery electric vehicle can meet all travel requirements.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to a torque management and control method for pure electric vehicles. Background technique [0002] Energy crisis and environmental deterioration have become important factors restricting global development. Research on energy-saving and environmentally friendly vehicles is one of the effective means to alleviate energy pressure and reduce environmental pollution. Compared with traditional internal combustion locomotives, pure electric vehicles are driven by pure electricity, which can achieve the purpose of reducing emissions and energy consumption. [0003] The power system of a pure electric vehicle should be able to realize three functions: driving function, safety and diagnostic function, auxiliary and basic functions, and the definition of driving function is that the power system is analyzed according to the input devices such as accelerator pedal position, bra...

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Problems solved by technology

Although this torque management method can also realize the above functions, there are many disadvantages. For example, when the mode is determined, the condition conflict or the condition gap between the modes is easy to appear, and the improper handling of the torque when switching between the modes will cause poor comfort for the driver. The torque demand table in multiple modes greatly increases the calibration workload, and the torque is prone to unstable transition during torque filtering, etc.

[0004] Moreover, the existing pure electric vehicle vehicle controller only performs energy recovery when it is determined that the accelerator pedal is released and the vehicle is decelerating, and will not recover energy when the vehicle is high-speed and the accelerator pedal opening is small, but in fact the driver's intention at this time Not accelerating, but maintaining a constant speed or slowing down slowly

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