Patent ID: 8840501

Claim:
A hybrid drive train, comprising: a hybrid assembly, comprising: a planetary gear set, comprising: a sun gear, a carrier, a plurality of planet gears rotatably affixed to said carrier and continuously meshed with said sun gear, a ring gear continuously meshed with said plurality of planet gears; a hybrid assembly input shaft coupled to said carrier; a hybrid assembly output shaft coupled to said ring gear; a first electric machine having the sun gear arranged to operate as a first electric machine rotor; a second electric machine having the ring gear arranged to operate as a second electric machine rotor; a brake clutch configured to selectively couple said first electric machine rotor to a housing of said hybrid assembly; and a first clutch configured to selectively couple said ring gear to said carrier, wherein said hybrid assembly is constructed to operate: in a first electrically variable transmission mode where both said first clutch and said brake clutch are deactivated, in a second fixed gear ratio mode where said first clutch is deactivated and said brake clutch is activated, in a third direct gear ratio mode where said first clutch is activated and said brake clutch is deactivated, and in a fourth locked mode where both said first clutch and said brake clutch are activated.