Three-gear parallel-axis type limping dual-motor single-planetary-line hybrid power system with power take-off module

Abstract

The invention discloses a three-gear parallel-axis type limping dual-motor single-planetary-line hybrid power system with a power take-off module. The system comprises an engine, a first motor, a second motor, a speed regulating mechanism, a shell, a first central shaft, a second central shaft and an output shaft, wherein the front end of the first central shaft penetrates out of the shell and is then connected with the engine, the first central shaft is sleeved with a first hollow shaft, the rear end of the first central shaft is in transmission connection with the hollow shaft through a planetary line, the rear end of the planetary line is connected with the second central shaft, the rear end of the second central shaft is in transmission connection with the output shaft, the rear end of the output shaft penetrates out of the shell to transmit power to a wheel system, the speed regulating mechanism is in transmission connection with the second central shaft and the output shaft, the first motor is in transmission connection with the hollow shaft, and the second motor is in transmission connection with the output shaft. The system provided by the invention has the advantages of being capable of effectively improving a space utilization rate, rich in gear, wide in vehicle model adaptability and the like.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a three-speed parallel-shaft hybrid power system with limp belt power take-off modules, dual motors and single planetary row. Background technique [0002] The existing vehicle hybrid power system includes engine, motor and transmission system (transmission). The motor has a single-motor scheme and a double-motor scheme. There are single row, double row, triple row and other plans. [0003] The planetary row mechanism has the characteristics of multiple degrees of freedom and can realize the free control of multiple operating points. Therefore, two motors can be used in the hybrid powertrain system to completely decouple the speed and torque of the engine through the two motors, so that The switching point between the engine and the electric motor can be freely controlled to achieve infinitely variable speed and maximize the fuel economy of the hybrid powertrain system. ...

AI Technical Summary

Problems solved by technology

[0006] (1) The maximum speed of the two drive motors is low, the peak torque is large, and the cost of the motor is high;

[0007] (2) The coaxial layout scheme results in a large axial length of the powertrain, high requirements for layout space, and poor vehicle adaptability;

[0008] (3) The system mostly adopts a split-type sealing scheme, and there are multiple sealing rings, which are not only difficult to seal, easy to leak oil, but also difficult to maintain;

[0009] (4) The system can only be applied to urban buses alone, and cannot be adapted to long-distance buses at the same time. Although the engine can directly drive the vehicle, the application probability of the engine directly driving the vehicle is very low, and the model adaptability is poor

[0010] (5) Due to the limitation of the gear position, the system cannot be applied to models with large power and torque requirements, and the model adaptability is poor

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