An electrically variable transmission family having low-content, low-cost
electrically variable transmission mechanisms including three
differential gear sets, a battery, three interconnecting members, two
electric machines serving interchangeably as motors or generators and
five or six selectable torque-transfer devices. The selectable torque
transmitting devices are engaged to yield an EVT with a continuously
variable range of speeds and five fixed speed ratios, including four
mechanically fixed forward speed ratios and one reverse speed ratio. The
torque transmitting devices and the first and second motor/generators are
operable to provide five operating modes in the electrically variable
transmission, including battery reverse mode, EVT reverse mode, reverse
and forward launch modes, continuously variable transmission range mode,
and fixed ratio mode.