Coaxial-type double-power coupling device and driving system of hybrid electrical vehicle

Abstract

The invention discloses a coaxial-type double-power coupling device and a driving system of a hybrid electrical vehicle. An internal combustion engine, a clutch, a speed-regulating motor, a planetary gear set and a torque output shaft are installed on the same axial line in sequence; and the output shaft of the internal combustion engine is connected with the clutch, and the output shaft of the clutch penetrates the hollow structure of a rotor of the speed-regulating motor to be concentrically connected with the torque output shaft; and the rotor of the speed-regulating motor is coaxially connected with a sun gear of the planetary gear set and a planet carrier of the planetary gear set is connected with the torque output shaft in a transmission manner. When the electric vehicle is started or runs at a low speed, a tandem type hybrid driving system is formed; when the electric vehicle runs at a medium speed or at a high speed, a power direct-driving system of the internal combustion engine is formed; and when the electric vehicle runs with high power, for example, accelerating or climbing on a slope, a parallel type hybrid driving system is formed. The invention has the advantages that the speed-regulating motor is connected with the torque output shaft in a transmission manner through the speed reduction of the planetary gear set, therefore, the output torque of the motor drive can be increased.

Description

technical field [0001] The present invention relates to the general vehicle technical field of transportation, and in particular to the arrangement of vehicle power units. It is suitable for electric vehicles, especially for hybrid electric vehicles composed of internal combustion engines and electric motors. Background technique [0002] A hybrid electric vehicle is a model between an internal combustion engine vehicle and a pure electric vehicle, and it is a transitional model from an internal combustion engine vehicle to a pure electric vehicle. It mainly solves the technical problems such as the large fuel consumption and emission of the existing internal combustion engine vehicles, while the pure electric vehicles are limited by the battery capacity, the mileage is limited, the charging is inconvenient, and the power is low. The internal combustion engine drive system is used in the hybrid electric vehicle, and the electric motor drive system is also used. The internal...

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Problems solved by technology

[0005] The defect of this coupling device is that due to the needs of the vehicle starting or running at a low speed, the rotational speed of the speed-regulating motor 3 is designed to be low, and it is difficult to increase the output torque of the motor and to increase the output power of the motor, which is limited by the structure and rotational speed. Thus affecting the economic and technical indicators of the vehicle

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