TWO-MODE, COMPOUND-SPLIT, HYBRID ELECTRO-MECHANICAL TRANSMISSION HAVING FOUR FIXED RATIOS

摘要

A two-mode, compound-split, electro-mechanical transmission utilizes an input member for receiving power from an engine, and an output member for delivering power from the transmission. First and second motor/generators are operatively connected to an energy storage device through a control for interchanging electrical power among the storage device, the first motor/generator and the second motor/generator. The transmission employs three planetary gear sets. Each planetary gear arrangement utilizes first, second and third gear members. At least one of the gear members in the first or second planetary gear sets is connected to the first motor/generator. Another gear member in the second and third planetary gear arrangement is connected to the second motor/generator. One of the gear members of the first or second planetary gear sets is continuously connected to one of the gear members in the third planetary gear set.