Patent ID: 7794347
Filing Date: 2010-09-14
Classification: B60K,F16H,Y02T

Abstract:
1. A power train having dual modes for hybrid electric vehicles, comprising: an engine; a first planetary gear set provided with a first carrier directly coupled to the engine; a second motor generator directly coupled to a first sun gear of the first planetary gear set; a second planetary gear set provided with a second sun gear directly coupled to the first sun gear of the first planetary gear set; a third planetary gear set having a third ring gear; a first clutch directly coupled between the second sun gear of the second planetary gear set and the third ring gear of the third planetary gear set to couple or decouple the second sun gear of the second planetary gear set to or from the third ring gear of the third planetary gear set; a second clutch to convert the third ring gear of the third planetary gear set between a stationary state and a rotatable state; and a first motor generator directly and continuously coupled to a third carrier of the third planetary gear set, wherein a drive wheel is coupled directly and continuously to either a first ring gear of the first planetary gear set or a second carrier of the second planetary gear set, either the first carrier or the first ring gear of the first planetary gear set is coupled to either the second carrier or a second ring gear of the second planetary gear set, and a third sun gear of the third planetary gear set is coupled to either the first ring gear of the first planetary gear set or the second ring gear of the second planetary gear set.