Multi-gear Hybrid Drive System Based on Planetary Gear Train

Abstract

The invention relates to a hybrid drive technology structure of a hybrid power automobile, in particular to a multi-gear hybrid drive system based on a planetary gear train, the structure point is that it also includes a planet wheel system, a second clutch and a second brake, wherein the planetary wheel system includes an inner ring gear, sun gear and planet carrier, one end of the generator shaft is fixedly connected with the inner ring gear, the inner hub of the first brake is fixedly connected with the motor rotor and the inner ring gear of the generator, the inner ring gear is connected with the planet carrier through the second clutch, a plurality of planet wheels with the same structure are uniformly distributed on the planet carrier along the circumferential direction; the sun gearis fixedly connected with the driving motor shaft, a second brake is arranged on the driving motor shaft, the inner hub of the second brake is fixedly connected with the driving motor and the sun wheel, and the planet carrier is fixedly connected with the power output shaft. The invention has the advantages that the dynamic property and the energy utilization efficiency of the hybrid power automobile under different working conditions are improved, the volume weight of the motor of the engine is reduced, the use occasions of the hybrid power automobile are expanded, and it is particularly suitable for engineering machinery vehicles requiring multiple gears and large transmission ratios.

Description

technical field [0001] The invention relates to a hybrid drive technology structure of a hybrid electric vehicle, in particular to a multi-gear hybrid drive system based on a planetary gear train. Background technique [0002] In the current automotive industry, hybrid electric vehicles (HEV) can effectively overcome the shortcomings of traditional vehicles and pure electric vehicles (EV) and take into account the advantages of both. Hybrid vehicles have experienced micro-hybrid, mild-hybrid, and medium-hybrid , the development process of strong mixing, and the continuous improvement of mixing degree has become a development trend. Electromechanical coupling is the core technology of hybrid electric vehicles. Its performance is directly related to whether the performance of the hybrid electric vehicle can meet the design requirements. By combining the engine and the motor in different ways, various hybrid structures can be obtained. Hybrid systems with different structures ...

AI Technical Summary

Problems solved by technology

However, the existing hybrid hybrid vehicles have the following problems: low working efficiency of the engine and motor, low energy recovery efficiency, general vehicle fuel economy and energy utilization efficiency, few gears, narrow speed and torque range, and the volume of the engine motor. Heavy weight, the use occasions are limited to cars and buses, not suitable for construction machinery and other vehicles

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