Stroke-increasing type electric automobile and mode switching control method and system thereof

Abstract

The invention discloses a stroke-increasing type electric automobile and a mode switching control method and system thereof. The stroke-increasing type electric automobile comprises a driving motor and a stroke increasing device, wherein the stroke increasing device is composed of a power generator and an engine. The mode switching control method comprises the following steps that an accelerator pedal signal and a brake pedal signal of the electric automobile are obtained; torque requirement analysis is conducted on the accelerator pedal signal and the brake pedal signal, so that the required torque of the driving motor is obtained, and the required power of the electric automobile is obtained according to the required torque of the driving motor; the power battery SOC of the electric automobile is detected, and the current speed of the electric automobile is obtained; and mode switching is conducted on the electric automobile according to the power battery SOC, the current speed of the electric automobile and the required power of the electric automobile. In this way, the oil consumption and NVH performance of the stroke-increasing type electric automobile are considered comprehensively, and the purposes of reducing oil consumption and improving the driving comfort are realized.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a mode switching control method of an extended-range electric vehicle, a mode switching control system of an extended-range electric vehicle and an extended-range electric vehicle. Background technique [0002] In related technologies, the maintenance mode adopted by the automobile is a pure power following mode. In many working conditions, the fuel consumption rate of the engine is not better than that of the traditional automobile engine, which cannot fully reflect the advantages of the hybrid electric vehicle. [0003] Moreover, the range-extending mode control strategies currently adopted by automobiles mostly focus on the engine working at a certain fixed power point, which has a relatively fixed impact on NVH (Noise, Vibration, Harshness, noise, vibration, and harshness) performance. The NVH performance of the vehicle is related to the speed of the vehicle, which will c...

AI Technical Summary

Problems solved by technology

[0002] In related technologies, the maintenance mode adopted by automobiles is a simple power following mode. In many operating conditions, the fuel consumption rate of the engine is not better than that of traditional automobile engines, which cannot fully reflect the advantages of hybrid vehicles.

[0003] Moreover, the range-extending mode control strategies currently adopted by automobiles mostly focus on the engine working at a certain fixed power point, which has a relatively fixed impact on NVH (Noise, Vibration, Harshness, noise, vibration, and harshness) performance. The NVH performance of the vehicle is related to the speed of the vehicle, which will cause greater vibration and noise when the vehicle is running at low speed, which will have a certain impact on the driving comfort of the vehicle.

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