Hybrid vehicle compound planetary gear set dynamic coupling mechanism

Abstract

The invention relates to a hybrid vehicle compound planetary gear set dynamic coupling mechanism. The hybrid vehicle compound planetary gear set dynamic coupling mechanism comprises an engine, a first planetary gear set, a second planetary gear set, a first motor and a second motor; the first planetary gear set is composed of a first sun gear, a first planet carrier, a first tooth ring and a planetary gear; the second planetary gear set is composed of a second sun gear, a second planet carrier, a second tooth ring and a planetary gear; the first tooth ring of the first planetary gear set is connected with the engine through a clutch, the first planet carrier is fixed on a vehicle frame, and the first sun gear is fixedly connected with a rotor of the first motor; the second sun gear of the second planetary gear set is fixedly connected with the first tooth ring of the first planetary gear set, the second planet carrier is fixed on the vehicle frame, the second tooth ring is fixedly connected with a rotor of the second motor, and the second tooth ring is combined with a differential mechanism in order to output power. According to the invention, the function that the engine can directly drive the vehicle, multiple dynamic coupling and mode switching can be achieved, and the implementation structure of the hybrid vehicle compound planetary gear set dynamic coupling mechanism is simple in structure and low in control demand.

Description

technical field [0001] The invention belongs to the technical field of automobile hybrid power, and in particular relates to a power coupling mechanism of a hybrid power automobile compound planetary gear set. Background technique [0002] Hybrid vehicles usually use a planetary gear mechanism as a power coupling mechanism. Its structure and coupling method determine the level and direction of power system research and development, and are the most critical link in development. Currently used planetary gear mechanisms are mostly divided into single-row planetary gear mechanisms and double-row planetary gear mechanisms. [0003] Among them, the working mode of the single-row planetary gear mechanism is mostly the power split mode, and its motor rotor is fixedly connected with the planetary gear ring gear as the output end to connect the differential; the generator rotor is fixedly connected with the planetary gear sun gear to realize the power conversion of the engine; the en...

AI Technical Summary

Problems solved by technology

However, since the output shaft of the internal combustion engine is connected to the first planetary carrier, and the first ring gear is connected to the second planetary carrier, the power output path of the engine is the engine, the first planetary carrier, the first ring gear, the second planetary carrier, and the second planetary carrier. Two ring gears, it can be seen that the engine power cannot be directly transmitted and output to drive the vehicle, it must be coupled by the first planetary gear train, and then transmitted from the first ring gear to the second planet carrier, so that the available output torque is limited, the vehicle's Insufficient power performance

At the same time, it is equipped with lockers on the second sun gear central shaft, the first sun gear central shaft, the second planetary carrier, and the first planetary carrier respectively. By switching each locker to match different working modes, the execution structure Complicated and the control strategy is not simple, and the control requirements are high

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