Patent ID: 9573456
Date: 2017-02-21
CPC Classifications: B60K,F16H,Y02T,Y10S

Claim:
1. A power transmission apparatus for a vehicle, comprising: a first input shaft selectively connected to an output side of an internal combustion engine through a first clutch; a second input shaft disposed at the first input shaft without any rotational interference and selectively connected to the output side of the internal combustion engine through a second clutch; a motor/generator performing a function of a motor and a generator; and a planetary gear set including first, second, and third rotation elements such that the first rotation element is directly connected with the motor/generator, the second rotation element is selectively connected with the second input shaft so as to be in synchronization with each other, and the third rotation element is directly connected with the first input shaft, wherein a variable gear ratio mode adapted to vary a speed ratio by combining rotational power of the internal combustion engine which is input to the third rotation element through the first input shaft by operation of the first clutch and rotational power of the motor/generator which is input to the first rotation element and to transmit rotational power according to the varied speed ratio through the second rotation element, and a fixed gear ratio mode adapted to transmit rotational power of the internal combustion engine through the second input shaft while connecting the planetary gear set with the second input shaft by operating the second clutch, after the second rotation element is connected with the second input shaft so as to be in synchronization with each other while maintaining the operation state of the first clutch in the variable gear ratio mode, are realized.