ELECTROMECHANICAL POWER-SPLIT SYSTEM AND METHOD OF OPERATING THE SAME

An electromechanical power-split system and a method of operating thereof is provided, with a mechanical drive branch including an internal combustion engine (), and with an electric drive branch including a first motor-generator block () including a first motor-generator () and a second motor-generator block () including a second motor-generator (), the first motor-generator () is connectable to the internal combustion engine () and to the second motor-generator (). The system includes a planetary gearset () with dual planet gears () and four input/output members for altering the flow ratio of the mechanical and electric drive branch . Each dual planet gear () is connected to the four input/output members, which are a first pair of input/output members formed by a first sun gear () and a ring gear (), and a second pair of input/output members formed by a second sun gear () and a planet carrier ().