Dual-electric hybrid engine multi-mode power system and driving method thereof

Abstract

The invention discloses a multi-mode power system for a dual-electric hybrid engine which includes an engine, an elastic damping disk, a first electric machine, a second electric machine, a first planetary row, a second planetary row, and a differential parallel-shaft gear transmission. The multi-mode power system includes an engine, an elastic damping disk, a first electric machine, a second electric machine, a first planetary row, a second planetary row, and a differential device. By selecting a clutch brake, the first motor brake and the second motor brake are closed and released, the engine is individually driven, the second motor is individually driven, and the engine and the second motor are jointly driven The combined driving mode of the engine and the first electric machine and thecombined driving mode of the engine and the first electric machine and the second electric machine are realized, and the rotor braking mode of the first electric machine and the second electric machine is realized when the engine is separately driven. The invention has the advantages of simple transmission system, full brake structure, strong fuel-saving and electricity-saving performance, long service life, small moment of inertia, strong power, high reliability and low cost, and is suitable for the hybrid power system of passenger vehicles.

Description

technical field [0001] The invention belongs to a vehicle power system, and in particular relates to a plug-in hybrid power system applied to a vehicle and a multi-mode driving method. Background technique [0002] In recent years, with the shortage of global oil resources and the aggravation of urban air pollution caused by motor vehicle exhaust emissions, there is an urgent need to study green, high-efficiency and energy-saving automotive power systems. Therefore, hybrid vehicles with low emissions and low energy consumption It has become one of the mainstreams in the development of the current automobile industry, especially with the continuous development of the plug-in hybrid electric vehicle industry, higher fuel saving rate, power saving rate, higher reliability and lower cost have become constraints for this type of vehicle. core of the automotive industry. A hybrid electrical vehicle (HEV) refers to a vehicle that is equipped with two power sources at the same time...

AI Technical Summary

Problems solved by technology

Since the mechanical energy output by the engine passes through two energy conversions in the serial HEV, the comprehensive efficiency of the power train is low; the efficiency of the parallel HEV is high, but this configuration requires a power coupling device to realize the power synthesis of the motor and the engine, and Considering the optimal working range of the engine, it is necessary to design a complex control system and control strategy; the configuration of a hybrid hybrid vehicle decouples the two degrees of freedom of power through a single row or multiple rows of planetary rows, so as to realize different drives of the car mode, but this hybrid mode has a complex structure, is difficult to manufacture, and requires an extremely complex control system and control strategy

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