Patent ID: 9108624
Filing Date: 2015-08-18
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A dual-mode electro-mechanical variable speed transmission comprising: a gear system, an input shaft, an output shaft system, a first electric machine, a second electric machine and at least one clutch; said gear system includes at least three component branches representing at least three co-axial rotatable components of the gear system, respectively; wherein the rotational speeds of any two of the at least three component branches define the speed for the remaining ones of the component branches, said output shaft system includes at least one of an output shaft connected with a drive wheel and a differential connected to the output shaft; the first electric machine couples in a clutch-less mechanical connection to a first component branch of the gear system; said input shaft couples directly or indirectly via a damper device in a rotatable connection to a second component branch of the gear system; said output shalt system couples in a clutch-less rotatable connection to a third component branch of the gear system; the second electric machine couples selectively via said at least one clutch to at least the second component branch with a first speed ratio or the third component branch with a second speed ratio; whereby the dual-mode variable speed transmission is switchable between a low speed ratio operation mode and a high speed ratio operation mode.