Hybrid power minibus power system and corresponding control method

Abstract

The invention relates to a hybrid middle bus power system which comprises an engine, a clutch, a generator, an automatic gearbox, a driving motor, a transmission shaft and a rear axle. An output shaft of the engine is connected with one end of a rotor shaft of the generator by the clutch; the other end of the rotor shaft is connected with the driving motor by the gearbox; and the driving motor is connected with the rear axle by the transmission shaft. Preferably, the hybrid middle bus power system comprises a vehicle control unit, an engine controller, an automatic gearbox controller, a generator controller, a power battery pack, a driving motor controller and a battery management device. The invention also relates to a control method of the hybrid middle bus power system. The hybrid middle bus power system disclosed by the invention is ingeniously designed, has a simple and compact structure, is convenient for the general arrangement of a finished vehicle and does not influence the flexibility and the diversity of driving modes; the efficiency of the finished automobile power system is also improved; and the hybrid middle bus power system is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to the technical field of vehicle power systems, in particular to a power system of a hybrid medium bus and a corresponding control method. Background technique [0002] At present, hybrid electric vehicles can be divided into three categories: series type, parallel type and hybrid type according to the energy flow of internal combustion engine and electric motor and the relationship between the two structures. Among them, the series type is close to pure electric vehicles, only the motor is the only driving power source, so the power of the motor is relatively large, but the motor does not often work under full load, and the efficiency of the motor is low. At the same time, the energy is converted by the engine-generator-motor Big loss. The engine operating conditions in parallel hybrid electric vehicles are easily affected by the driving conditions of the vehicle, and the e...

AI Technical Summary

Problems solved by technology

Among them, the series type is close to pure electric vehicles, only the motor is the only driving power source, so the power of the motor is relatively large, but the motor does not often work under full load, and the efficiency of the motor is low. At the same time, the energy is converted by the engine-generator-motor Big loss

The engine operating conditions in parallel hybrid electric vehicles are easily affected by the driving conditions of the vehicle, and the emission performance is poor

Although the traditional hybrid type can give full play to the advantages of series and parallel hybrid electric vehicles, it has various working modes, energy saving and good emission performance, but its multi-energy power system has complex structure, large space required for layout and difficult control, which limits its wide application

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