Vehicle control method and control device, and vehicle

Abstract

The invention provides a vehicle control method and control device, and a vehicle. The method comprises the steps that engine temperature is collected and demand torque and battery discharge efficiency of the vehicle are acquired; the current working condition of the vehicle is judged; if the vehicle is in a combined driving working condition, the torque difference between the demand torque and anupper limit of a preset engine economic zone and a fuzzy interval in a theoretical domain space corresponding to the engine temperature and the battery discharge efficiency are determined, and enginetorque and motor torque of the combined working condition are determined according to a preset fuzzy rule and the fuzzy interval. According to the vehicle control method, when the vehicle is in the combined driving working condition, the optimum torque and the motor torque can be determined according to the torque difference between the demand torque and the upper limit of the engine economic zone, the engine temperature and the battery discharge efficiency, the rationality of torque distribution is improved, the aim of fuel economy and emission performance reaching the optimum is achieved, the economy of the vehicle is improved, and energy is saved.

Description

Technical field [0001] The present invention relates to the field of automobile technology, in particular to a vehicle control method, control device and vehicle. Background technique [0002] At present, the logic threshold control strategy is currently the most mature and widely used hybrid electric vehicle control strategy. The motor can not only be used as a motor to "cut the peak and fill the valley" of the engine output torque, but also can be used as a generator to carry out the power battery. Charge and adjust the engine operating point and the SOC (State of Charge) of the power battery. [0003] However, the logic threshold control strategy in the related technology belongs to static control, and does not consider the impact of dynamic factors such as power battery charging and discharging efficiency and engine temperature on control parameters, resulting in failure to optimize fuel economy and save fuel. It has not been fully utilized and needs improvement. Summary of t...

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Problems solved by technology

[0003] However, the logic threshold control strategy in the related art belongs to static control, which does not consider the influence of dynamic factors such as power battery charging and discharging efficiency and engine temperature on the control parameters, resulting in failure to achieve optimal fuel economy and fuel saving effect. Underperformed, room for improvement

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