| abstract |
So that apron tractors can be used exhaust-free when operating in closed halls, there are, in addition to the drive by means of an internal combustion engine, electric drives which are supplied, for example, by means of a battery with drive energy. According to the invention, the tractor is operated with a fuel cell, and in the manner of a construction kit, a battery pack, a fuel cell unit and optionally also a hybrid unit consisting of a smaller battery pack and a range extender in the form of an internal combustion engine can be used in the tractor as a power supply unit. |