Patent ID: 6702709
Filing Date: 2004-03-09
Classification: B60K,B60L,B60W,F16H,Y02T,Y10S

Abstract:
A transmission for use in a hybrid powertrain of a motor vehicle having an internal combustion engine and a driveline, comprising:an input shaft selectively driven by the engine; an output shaft interconnected to the driveline; a planetary gear transmission operably interconnecting said input shaft and said output shaft and including first, second and third gearsets, said first gearset having an input driven by said input shaft and an output, said second gearset having an input driven by said output of said first gearset and an output, and said third gearset having an input driven by said output of said second gearset and an output driving said output shaft; a first transfer shaft operably connected to said first gearset; a transfer drum operably connected to said second gearset; a second transfer shaft operably connected to said third gearset; power-operated clutches for selectively engaging said planetary gear transmission to establish a plurality of gear ratio drive connections between said input shaft and said output shaft; and an electric motor/generator operable to selective drive one of said first transfer shaft and said transfer drum, said electric motor/generator is operable in a first mode for transferring motive power through said planetary gear transmission to said output shaft, and is further operable in a second mode for synchronizing rotation of said input shaft relative to said output shaft during shifting of said planetary gear transmission between said gear ratios.