| The "diesel-electric wheel hub drive with energy storage" concept improves travel comfort, saves energy and benefits the environment.
City buses have to be able to brake and get moving at short distances. In conventional vehicles, during every braking procedure a significant proportion (up to 70%) of the energy created by the combustion engine as it starts up is converted into heat. It makes a lot more sense to "save" the braking process energy in a temporary energy store and then reuse it again to power the bus. This saves energy and benefits the environment, since it reduces CO2 emissions. An additional positive consequence is improved noise management. The process of getting the bus moving requires maximum performance. At this point, the energy store supplements or replaces the diesel engine's power by silently transferring energy, which results in a reduction of noise levels as the bus starts to move. |
Electric wheel hub drives make it possible to design especially low vehicle floors, even in the axle area, since no connecting drive shaft is needed between the right and left wheel. Consequently, wheel wells are small, allowing for wide aisles and comfortable passenger movement.
Electric drives are infinitely variable. Manual transmissions or automatic transmissions with multiple gears are not required. This means that buses with electrically powered wheels accelerate evenly, without interruptions. |
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