Hybrid system

Abstract

The invention provides a hybrid system. The hybrid system comprises a central shaft, a first hollow shaft, a second hollow shaft, a first motor and a second motor and further comprises a double-way brake arranged at the front end of the first hollow shaft; the double-way brake is used for braking the central shaft or the first hollow shaft; the hybrid system further comprises a gear ring and an output shaft; the gear ring is mutually engaged with a front-line planet wheel and a rear-line planet wheel; and the gear ring is connected with the output shaft. By designing connecting modes between double planet lines and an engine, the use probability of using the engine to directly driving a complete vehicle to run is increased, the transmission efficiency of a power assembly system is higher and the fuel consumption of the system is reduced. The double-way brake can lock a rear-line planet carrier by braking towards the left to realize a double-motor driving function and can lock the rear-line planet wheel by braking towards the right to realize an engine direct driving function.

Description

technical field [0001] The invention relates to a hybrid power drive system, in particular to a hybrid power system. Background technique [0002] At present, the planetary row hybrid system used in the new energy city bus market is mainly a coaxial arrangement scheme of dual motors and double planetary row. The combination of two or more planetary gear trains is used to work with two motors. The speed and torque of the engine are completely decoupled by the two electric motors, so that the engine operating point can be freely controlled, realizing infinitely variable speed, and maximizing the fuel economy of the hybrid system. [0003] However, this solution will increase the complexity of the configuration of the hybrid system, and increase the complexity and diversity of the power flow in the system and the factors affecting the system efficiency. The coaxial layout scheme results in a large axial length of the powertrain, high requirements for layout space, and poor ve...

AI Technical Summary

Problems solved by technology

[0005] 1. The maximum speed of the two drive motors is low, the peak torque is large, and the cost of the motor is high;

[0006] 2. The coaxial layout scheme results in a large axial length of the powertrain, high requirements for layout space, and poor vehicle adaptability;

[0007] 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;

[0008] 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;

[0009] 5. The planetary gear train has the characteristics of multiple degrees of freedom, and the restrictions on the degrees of freedom are complicated when performing dual motor output

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