Lion's City 12 C EfficientHybrid

MAN Lion's City 12 C EfficientHybrid is the MAN diesel city bus with MAN efficient hybrid technology and available in a 12 m and 18 m version. This EPD assesses the 12 m version. The MAN EfficientHybrid technology consists of a wear-free electric motor used between the engine and the gearbox together with an UltraCap energy accumulator system (48 V, 40 Wh high-performance capacitors) placed on the roof and a smart control system. When the vehicle slows down before coming to a halt, the crankshaft starter generator converts the generated brake energy into electrical energy. In the UltraCaps, the electrical energy is stored electrostatically, this means without chemical processes as with conventional batteries. While the vehicle is at standstill, the combustion engine is turned off and the UltraCap accumulator takes over the supply of the vehicle electrical system for all functions (e.g. opening and closing of the doors, operation of the interior lighting and ventilation). Once driving off again, the crankshaft starter generator uses the available energy from the UltraCap capacitors to start the combustion engine. In addition, the crankshaft starter generator can use excess stored energy to act as an additional hybrid drive and thereby take some of the load off the combustion engine.