Oil-electric-hydraulic hybrid power system with self-powered front shaft and self-powered rear shaft and conversion method of different working patterns

Abstract

The invention relates to an oil-electric-hydraulic hybrid power system with a self-powered front shaft and a self-powered rear shaft and a conversion method of different working patterns, and belongsto the field of vehicle hybrid power. The oil-electric-hydraulic hybrid power system comprises a front shaft oil-electric hybrid power and a rear shaft electric-hydraulic hybrid power; on the front shaft of the vehicle, an engine is in parallel connection with a front shaft motor through a front shaft clutch, and is connected with a front shaft differential through a gearbox; and on the rear shaftof the vehicle, a hydraulic pump/a motor is in parallel connection with a rear shaft motor through a rear shaft clutch, and is connected with the rear shaft main decelerator/differential assembly. According to the oil-electric-hydraulic hybrid power system disclosed by the invention, a hydraulic unit is introduced, so that in the braking process of the vehicle, the energy recovery rate of the vehicle can be increased, the consumption of the electric current of the front shaft motor and the rear shaft motor can be reduced, and the impact of discharging/charging current to a battery in the process of driving/energy recovering can be reduced, so that in the driving process, the dynamic performance of the vehicle can be strengthened; and the front shaft and the rear shaft are self-powered, sothat the passability of the vehicle is also strengthened.

Description

technical field [0001] The invention belongs to the technical field of vehicle hybrid power, and relates to an oil-electric-hydraulic hybrid power system, in particular to an oil-electric-hydraulic hybrid power system driven independently by front and rear axles and a method for switching between different working modes. Background technique [0002] With the increasing environmental and energy problems, as well as the increasingly stringent restrictions on vehicle fuel consumption and emission regulations, hybrid vehicles are receiving more and more attention from various fields. Hybrid vehicles can be distinguished from energy storage components, and can be divided into two types: gasoline-electric hybrids using electric energy storage and hydraulic hybrids using hydraulic energy storage. At present, the most widely used is the gasoline-electric hybrid system, and the driving mode is generally front-wheel drive. However, simply using battery energy storage will cause the ...

AI Technical Summary

Problems solved by technology

In the scheme, the internal combustion engine and the electric motor are connected by a planetary row, and then connected in parallel with the hydraulic system, and the same shaft is used to distribute power to the front and rear wheels to realize the four-wheel drive of the vehicle, and its structure is slightly complicated

Patent CN201320795429.5 discloses a hybrid power transmission system of hybrid electric hydrostatic transmission, which realizes different transmission modes through a power coupling mechanism similar to a manual transmission, but its structure is also very complicated

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