Automobile hybrid power coupling system and control method thereof

Abstract

The invention relates to the field of automobiles and discloses an automobile hybrid power coupling system and a control method thereof. According to the coupling system, power on an engine is transferred to a generator by adopting a mode of a first planetary gear, and a first brake is arranged on the first planetary gear, so that the structure of the coupling system is compact and the space is saved; power modes can be switched by virtue of connection or disconnection of the first brake and the first planetary gear; and when the first brake and the first planetary gear are disconnected, speed ratio adjustment of each rotating element in the planetary gear can be realized, the speed ratio between the engine and a motor is adjustable, and the speed ratio adjustment range is relatively large, so that the requirements of power performance and economical performance are met simultaneously. According to the control method, switching of different power modes is controlled by judging the residual electric quantity value of a battery and the automobile speed, so that running requirements under different working conditions are met, and excellent power performance and economical performance can be obtained simultaneously.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an automobile hybrid coupling system and a control method thereof. Background technique [0002] Since entering the 21st century, China's automobile production and sales have continued to grow, and China has become a major automobile country in the world. In this context, the internal growth momentum, consumption structure, production mode and competition pattern of the automobile industry are undergoing profound changes, while the constraints of external factors such as energy, environment and transportation are becoming increasingly severe. As an important direction for the future development of the automobile industry, energy-saving and new energy vehicles will have a profound impact on China's energy, environment, technology, and economy. The development of energy-saving and new energy vehicles (such as gasoline-electric hybrid vehicles) follows China's strategic policy of advocat...

AI Technical Summary

Problems solved by technology

[0004] Since the hybrid system involves traditional engine drive and electric motor drive, the structure is often complex and takes up a lot of space, which affects the layout of other parts of the vehicle

Due to size constraints, the power of the motor is generally not large, and the power performance under pure electric power is poor

Moreover, in the current hybrid transmission integrated motor scheme, the engine and the generator are generally connected by a first-gear gear structure, which cannot achieve the effect of adjusting multiple speed ratios, and it is often difficult to obtain satisfactory power and economy.

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