Three-power-source coupling hybrid power system suitable for heavy truck

Abstract

The invention discloses a three-power-source coupling hybrid power system suitable for a heavy truck, which belongs to the technical field of transmission systems of heavy trucks and comprises a shell, a generator, a driving motor, an engine and a double-planet-row power coupling mechanism. The engine is connected with the rear planet carrier through a central shaft; the rear sun gear is connected with an inner hollow shaft connected with a generator; the front sun gear is connected with an outer hollow shaft connected with a driving motor; and a sliding sleeve locking device is arranged on the shell. Three powers are coupled under different conditions through a double-planet-row power coupling mechanism, the speed of a rear sun gear and the speed of a rear planet carrier are adjusted through a generator and an engine respectively, stepless speed change and decoupling of the rotating speed of the engine and the vehicle speed are achieved, and flexible switching of various working modes is achieved by adjusting a sliding sleeve locking device. Non-interruption of output power in the gear shifting process under each working mode is realized through torque compensation of the generator and the engine; and the comfort, safety and economical efficiency of the whole vehicle are improved while the dynamic property is ensured.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty truck transmission systems, in particular to a three-power-source coupled hybrid system suitable for heavy-duty trucks. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fuels, the use of new vehicle power devices), integrated vehicle power control and advanced technology in driving, the formation of advanced technical principles, with Automobiles with new technology and new structure. [0003] New energy vehicles include four types of hybrid electric vehicles (HEV), pure electric vehicles (BEV, including solar vehicles), fuel cell electric vehicles (FCEV), and other new energy (such as supercapacitors, flywheels and other high-efficiency energy storage) vehicles wait. Unconventional vehicle fuels refer to fuels other than gasoline and diesel. [0004] In the field of heavy trucks, the hybri...

AI Technical Summary

Problems solved by technology

At present, the hybrid system of heavy-duty trucks usually adopts the P2 parallel configuration. The structure of the gearbox used in this configuration is basically the same as that of the traditional energy gearbox. Both have power interruptions for shifting, difficulties in axial layout, and inability to decouple the engine speed and vehicle speed. question

Although the power-split hybrid configuration adopted in the passenger car field can realize stepless speed regulation and no power interruption during driving, its structure is simple and the transmission torque is small, so it cannot be well adapted to the field of heavy-duty trucks with more complex working conditions.

[0005] So far, there is no complete hybrid system for heavy-duty trucks that can maintain power while meeting the requirements of uninterrupted shifting power, continuously variable transmission, and decoupling of engine speed and vehicle speed.

Images