Hybrid power system and control method

Abstract

The invention provides a hybrid power system and a control method. The system comprises an engine, a main shaft, a first clutch, a second clutch, a third clutch, a fourth clutch, a first planetary gear train, a second planetary gear train, a first connecting cylinder, a second connecting cylinder, a first brake, a second brake, a first motor and a power supply assembly, wherein an output shaft ofthe engine is coaxially connected with the main shaft; a rotor of the first motor is coaxially connected with the main shaft; the first connecting cylinder is connected with a first planet carrier anda second gear ring; the second connecting cylinder is connected with a first gear ring and a second planet carrier; the first planet carrier is in transmission connection with wheels; the first clutch is connected with the main shaft and a first center wheel; the second clutch is connected with the main shaft and the second planet carrier; the third clutch is connected with the main shaft and a second center wheel; the fourth clutch is located on the second connecting cylinder; the first brake can brake the first gear ring; and the second brake can brake the second center wheel. Multi-gear switching of the hybrid power system can be achieved, and the adaptability of the system is enhanced.

Description

technical field [0001] The present disclosure relates to the technical field of automobiles, in particular to a hybrid power system and a control method. Background technique [0002] As a fast-paced and efficient means of transportation in life, the number of vehicles has increased year by year in recent years. Most traditional vehicles use fossil fuels (such as gasoline, diesel, etc.) to power the engine, and the exhaust gas will pollute the environment, which does not meet the requirements of energy saving and environmental protection. Therefore, it is necessary to use non-polluting new energy sources (such as electric energy) to replace fossil fuels to provide power for vehicles. At present, there are hybrid electric vehicles that use new energy and fossil fuels as energy sources. Hybrid electric vehicles can greatly improve the power and fuel economy of the vehicle and reduce emissions. [0003] The transmission mechanism in the hybrid system of the hybrid electric ve...

AI Technical Summary

Problems solved by technology

[0004] However, in order to realize multi-gear shifting in related technologies, multiple sets of gear trains need to be set in the manual transmission, which will undoubtedly increase the space ratio of the hybrid system; and for automatic transmissions, the power source is usually placed in the planetary gear train. A certain part of the planetary gear train is fixedly connected. When a certain part is used as the active part in the planetary gear train, at most two gears can be changed, but multi-gear (such as 4 gears) cannot be switched.

Therefore, the hybrid power system in the related art has poor adaptability to switch different gears according to different working conditions, which makes the working efficiency of the power source low.

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