Method for controlling chargeable hybrid power vehicle

Abstract

The invention provides a method for controlling a chargeable hybrid power vehicle, and is used for better achieving an effect of an engine for requirements of the whole vehicle, reducing fuel oil consumption and improving noise vibration and harshness (NVH) performance. In the method, the running state of the engine is controlled by an engine controller according to a vehicle running stage, a state of charge (SOC) value of a power battery, and a vehicle speed; in a starting stage, the engine controller controls operating modes of the engine and a generator according to the SOC value of the power battery; in a running stage, the engine and the generator are combined into a generator set to operate, and the engine controller controls the engine to run at different preset operating points according to real-time vehicle speed situation; and if the vehicle speed is higher, a rotary speed of the engine at the preset operating points is higher. The preset operating points are set according to influence of an engine noise on the NVH performance of the whole vehicle, a power requirement of the whole vehicle, and the economy of fuel oil; and the engine is optimized according to the preset operating points, a universal characteristic curve of the engine approaches to the preset operating points.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle control, and in particular relates to a control method of a rechargeable hybrid electric vehicle. Background technique [0002] The hybrid electric vehicle combines the drive motor and the engine drive system together, and uses the drive motor to make up for the weakness of the engine drive, so that the engine can be kept in the best working condition as far as possible, and can realize engine idle stop, auxiliary drive and regenerative braking energy recovery, etc. Features. Therefore, the hybrid vehicle not only improves the driving performance of the vehicle, but also improves the fuel efficiency and reduces engine emissions. It is a low-emission and low-fuel consumption vehicle with practical development significance today. [0003] At present, in the engine participating working mode, although the hybrid vehicle can control the engine to work in the economical area, it still...

AI Technical Summary

Problems solved by technology

[0003] At present, in the engine participation mode, although the hybrid vehicle can control the engine to work in the economical area, it still cannot give full play to the best working characteristics of the engine, and has not optimized the operating conditions of the engine.

In the series hybrid, the engine and the generator are combined to form a generator set. The engine does not directly drive the vehicle, and the operating conditions of the engine are not affected by the vehicle. This leads to the need for the engine to operate at low speeds due to the decrease in the SOC value of the power battery. Running under high-speed and high-load conditions is not conducive to the NVH performance of the whole vehicle; in addition, when the engine is cold-started, due to the needs of the whole vehicle, the engine directly works in the economical area, which is not conducive to the HC emission of the engine during the cold-start period

Images