Composite power dividing type hybrid power transmission system and working method thereof

Abstract

The invention relates to a combined power dividing type hybrid power transmission system and a working method thereof. The combined power dividing type hybrid power transmission system comprises an internal combustion engine, a motor, a generator and a first planetary gear train, a power output shaft of the internal combustion engine is in planetary transmission connection with the first planetary gear train, and a gear ring of the first planetary gear train is connected with an output shaft; the system further comprises a second planetary gear train. a gear ring of the second planetary gear train is fixed, a sun gear shaft of a hollow structure is arranged in the middle of a sun gear of the second planetary gear train, a main shaft of the motor is in transmission connection with the sun gear shaft, an output shaft penetrates through the middle of the sun gear shaft and can rotate relative to the sun gear shaft, the sun gear shaft is connected with a first gear, and a planet carrier of the second planetary gear train is fixedly connected with a second gear. The portion, penetrating out of the sun wheel shaft, of the output shaft is connected with a gear shifting inner gear ring capable of being meshed with the first gear or the second gear after sliding. According to the hybrid power transmission system, when the output torque is converted and adjusted, power is not interrupted, power response is smooth, three-gear output torque coarse adjustment is achieved, and the step and stepless combined gear shifting mode is achieved.

Description

technical field [0001] The invention relates to the field of hybrid power transmission systems, in particular to a compound power split type hybrid power transmission system and a working method thereof. Background technique [0002] The power-split hybrid power transmission system inputs the power of the internal combustion engine from the planet carrier through a coupled planetary row, and then splits it into two paths for transmission: one directly transmits most of the torque to the ring gear, and the other drives the generator to generate electricity through the sun gear. Motor, the power of the motor is output after superimposing the power of the ring gear on the output shaft, such as figure 1 shown. This scheme of power splitting and then merging can realize the modulation (mainly amplification) of the input internal combustion engine torque, and unlike ordinary transmission devices that need to change the torque and speed by changing the meshing gear pair, it also m...

AI Technical Summary

Problems solved by technology

This configuration can meet the speed and torque requirements of a vehicle with a large β requirement under all operating conditions, but its disadvantage is that there will be a short power interruption during the shifting process, which is unfavorable for the vehicle running. Especially in the operating conditions of heavy load and climbing, the impact of power interruption is greater

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