PT Journal AU Plomer, J TI New Concept of Hybrid Drive with Multi-Gear Planetary Transmission SO Transactions on Transport Sciences PY 2014 BP 17 EP 26 VL 7 IS 1 DI 10.2478/v10158-012-0050-z DE Hybrid drive; multi-gear planetary transmission; gear clutches. AB Paper presents an innovative concept of a hybrid drive with two- or three-gear planetary transmission. The arrangement can be extended by one or two additional clutches. Considering the minimum of two-gear planetary transmission, the combustion engine can work in an optimum efficiency mode, i.e., with low consumption and thus with reduced emissions of pollutants, as well as in modes enabling energy storage. Individual gears of the multifunction transmission, constructed as a system as simple as possible, accommodate various driving demands, e.g., serial or parallel driving modes, or parking blockage. ER