Hybrid power vehicle, working mode control system and method thereof

Abstract

The invention discloses a working mode control method of a hybrid power vehicle. The method comprises the steps that usable driving power of a driving motor under a serial driving mode after the vehicle is started is obtained; whether or not a driver driving demanding power is met is judged according to the usable driving power of the driving motor; whether or not the engine can be allowed to enter an efficient area by the driver driving demanding power at a current driving speed when the engine is directly driven is judged; whether or not the demand in which the power of a whole vehicle is not reduced is met by the direct driving power of the engine at the current driving speed is judged; a working mode of the vehicle is switched to be a parallel driving mode. According to the method, theswitching timing of the working mode of the vehicle is decided to ensure that the power of the whole vehicle is not consumed and ensure the economical performance of the whole vehicle. The inventionfurther provides a working mode control device of the hybrid power vehicle and the hybrid power vehicle.

Description

technical field [0001] The invention relates to a control method of a vehicle power system, in particular to a hybrid vehicle, a working mode control system and a method thereof. Background technique [0002] The existing hybrid vehicle power system working mode control method mainly controls the driving mode of the hybrid vehicle based on the SOC of the power battery and the speed of the vehicle, but the SOC cannot fully reflect the real discharge capacity of the power battery. For example, the same SOC Under different temperature environments (-25°C, 25°C, 50°C), affected by the characteristics of the battery module itself, the discharge capacity of the power battery will be significantly different, so only rely on the SOC of the power battery to determine the power of a hybrid vehicle. The switching timing of the system working mode cannot achieve the effect of optimal efficiency or optimal dynamic performance of the vehicle power system. [0003] Therefore, how to provi...

AI Technical Summary

Problems solved by technology

[0002] The existing hybrid vehicle power system working mode control method mainly controls the driving mode of the hybrid vehicle based on the SOC of the power battery and the speed of the vehicle, but the SOC cannot fully reflect the real discharge capacity of the power battery. For example, the same SOC Under different temperature environments (-25°C, 25°C, 50°C), affected by the characteristics of the battery module itself, the discharge capacity of the power battery will be significantly different, so only rely on the SOC of the power battery to determine the power of a hybrid vehicle. The switching timing of the system working mode cannot achieve the effect of optimal efficiency or dynamic performance of the vehicle power system

Images