Power transmission mechanism for parallel hybrid vehicle

Abstract

Provided is a power transmission mechanism for a parallel hybrid vehicle, which can be applied to a large-size hybrid vehicle. To this end, the power transmission mechanism can smoothly combine and separate input and output powers of a motor and an engine and provide an input and output power combining and separating mechanism with a sufficient strength. The power transmission mechanism comprises a motor output shaft of a motor / generator which is rotatable independently of an engine drive shaft system connecting to a transmission through a main clutch; a motor brake which is provided at one end side of the motor output shaft and which releases / fixes the motor output shaft; a planetary gear mechanism provided between the other end side of the motor output shaft and the engine drive shaft system and comprised of a sun gear provided on the other end side of the motor output shaft, an outer gear provided in the engine drive shaft system and having a gear ratio of 1:1 to the sun gear, a plurality of planetary gears with which the sun gear and the outer gear engage, and a planetary carrier which receives and transmits the revolutions of the planetary gears; and a gear brake which is provided on one end side of the planetary carrier and which releases / fixes the planetary carrier.

Description

technical field [0001] The present invention relates to a power transmission mechanism of a hybrid electric vehicle, in detail, relates to a power transmission mechanism of a parallel hybrid electric vehicle which uses the power of an engine and a motor / generator together. Background technique [0002] As disclosed in Non-Patent Document 1, in commercial vehicles such as trucks, in order to reduce the load on the engine and improve the fuel consumption rate, a parallel hybrid system has been proposed. When driving with the load applied to the engine, the motor is assisted. [0003] like Image 6 As shown, the arrangement of the driving system of the above-mentioned hybrid power system is that all of them are arranged in the coaxial. Furthermore, a rotor 13 of the motor 5 is attached to an engine drive shaft system 11 connected from the main clutch 3 to the transmission 7 , and a propulsion shaft 15 is connected between the transmission 7 and the final reduction gear 9 . ...

AI Technical Summary

Problems solved by technology

[0006] However, the power transmission mechanism of the above-mentioned hybrid system has a disadvantage that, in the case of driving only by the driving force of the engine 1, due to the Mechanical loss due to the influence of magnets

In addition, when the stator 17 of the motor 5 is energized in order to offset the load loss, a new electrical loss is generated

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