implemented in a variety of applications one example is a hybrid electric vehicle powertrain a hybrid electric vehicle powertrain is shown in fig1 a vehicle system controller vsc 10 including silent key start logic a battery and battery energy control module becm 12 and a transmission 14 together with a motor generator subsystem comprise a control area network can an internal combustion engine 16 controlled by vsc 10 distributes torque through torque input shaft 18 to transmission 14 the transmission 14 includes a planetary gear unit 20 which comprises a ring gear 22 a sun gear 24 and a planetary carrier assembly 26 the ring gear 22 distributes torque to step ratio gears comprising meshing gear elements 28 30 32 34 and 36 a torque output shaft 38 for the transmission 14 is drivably connected to vehicle traction wheels 40 through a differential and axle mechanism 42 gears 30 32 and 34 are mounted on a countershaft with gear 32 engaging a motor driven gear 44 electric motor 46 drives gear 44 which acts as a torque input for the countershaft gearing the battery delivers electric power to the motor through power flow path 48 54 generator 50 is connected electrically to the battery and to the motor 46 in a known fashion as shown at 52 the powersplit powertrain system of fig1 may be operated in a variety.