Hybrid power transmission system with dual gear structure

Abstract

The invention discloses a hybrid power transmission system with a dual gear structure. The system at least comprises an engine and a motor, the engine is fixedly connected to one end of a cut-off clutch, and the other end of the cut-off clutch is fixedly connected with the motor and an input shaft assembly of a gearbox; the system further comprises a gear mechanism cooperatively connected to the input shaft assembly and an output shaft assembly for transmitting power through the gear mechanism, the gear mechanism at least comprises a dual gear fixedly arranged on a first input shaft, and the dual gear is in transmission connection with an even-numbered driven gear set arranged on output shaft; the gear mechanism further includes an odd-numbered driving gear set fixedly arranged on a secondinput shaft, and the odd-numbered driving gear set is in transmission connection with an odd-numbered driven gear set disposed on the output shaft. The system mainly has the advantages that set gearsare reduced, the system structure is simplified, all the transmission gears can run in a hybrid power mode, and the fuel saving performance is good; at the same time, the engine can charge a storagebattery during running and idling.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a hybrid power transmission system with a dual gear structure. Background technique [0002] With the worldwide energy shortage and emission regulations restricting vehicle carbon emissions, safety, energy saving and environmental protection have become the themes of modern automobile development. At the same time, the traditional internal combustion engine can no longer meet the emission requirements, and new energy vehicles such as pure electric vehicles and fuel cell vehicles are restricted by the bottleneck of key technologies, and it is difficult to break through in a short time. Specifically in: [0003] ①Traditional powertrain technology mainly focuses on reducing engine emissions and improving engine efficiency, but improving engine technology alone can no longer meet increasingly stringent emission regulations, and new breakthroughs need to be found; [0004] ②Alth...

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Problems solved by technology

[0003] ①Traditional powertrain technology mainly focuses on reducing engine emissions and improving engine efficiency, but improving engine technology alone can no longer meet increasingly stringent emission regulations, and new breakthroughs need to be found;

[0004] ②Although pure electric vehicles can achieve zero emissions and meet the requirements of any emission regulations, the research and development of electric vehicles involves many key technologies, such as batteries and battery control, high-performance motors, and integrated vehicle control. It is still immature, and limited by factors such as high battery cost, few charging and discharging cycles, and short vehicle mileage, the development of pure electric cars will be greatly restricted in a short period of time

[0007] However, the current dual-clutch hybrid transmission has the following defects: 1. Since the motor is connected to the fourth and sixth gears through the motor drive shaft assembly, in the hybrid mode, the engine and the motor can only drive 2 / 4 / 6 / R at the same time. 2. The motor cannot charge the battery when driving. In order to ensure the power supply of the motor, the battery is large in size and high in cost; 3. The structure of the drive system is complex , takes up a lot of space and is inconvenient to carry

The transmission mechanism cannot drive all gears to work in hybrid mode, which cannot meet the requirements of power and economy well

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