An integrated dual-motor and dual-row planetary gear hybrid system and control method

Abstract

The invention discloses a double-motor and double-row planetary gear integrated hybrid power system and a control method. A driver can conveniently start a traditional pure engine mode, a pure electric mode, a stroke increasing mode or an idling mode and a hybrid power mode through the system. Compared with the prior art, according to the technical scheme of the double-motor and double-row planetary gear integrated hybrid power system and the control method, the structure is simple, the space is saved, arrangement is convenient, and the defects that an existing parallel type hybrid power vehicle and a power assembly thereof are large in size and space, complex in structure and the like. Additionally, when the system is in the pure electric mode, different reduction gear transmission ratios can be chosen for driving, and pure electric power performance under the low speed and pure electric economical efficiency at the high speed are improved. A first motor and a second motor can start an engine through multi-stage reduction gears, the riding comfort of engine starting in parking or travelling can be improved, the peak torque of the motors can further be reduced, the sizes of the motors are decreased, and design of the motors is further optimized.

Description

technical field [0001] The invention relates to the technical field of automobile hybrid power, in particular to a hybrid power system and control method integrating double motors and double-row planetary gears. Background technique [0002] With the increasing scarcity of petroleum resources, the gradual improvement of people's awareness of environmental protection, and the increasingly stringent requirements of environmental protection regulations, there is an urgent need for green and environmentally friendly vehicles that can save energy and have low emissions or even zero emissions. To this end, governments around the world and major automobile manufacturers are intensifying their efforts to develop various types of new energy vehicles. Compared with traditional internal combustion engine vehicles, new energy vehicles use vehicles with two or more energy sources. [0003] The most common gasoline-electric hybrid vehicle has both an engine and an electric motor, relying ...

AI Technical Summary

Problems solved by technology

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

On the one hand, in the current mainstream motor parallel hybrid power system, the motor in common technology adopts a disc structure and is installed between the engine and the transmission, occupying a certain axial dimension, resulting in excessive axial length of the powertrain, Vehicle arrangement is difficult

At the same time, limited by the size, the power of the motor is generally not large, and the power performance under pure electric power is poor

On the other hand, the current hybrid transmission integrated motor scheme adopts a first-speed gear structure, and rarely adopts a multi-speed multi-gear structure. It is often difficult to obtain satisfactory power performance and economy.

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