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CyberCab Energy Management

2getthere’s CyberCab is equipped with an electric engine, powered by an on-board energy source. An on-board power source is preferred over power drawn from the infrastructure as this drastically reduces the costs of the infrastructure, increases system flexibility and allows completion of all transports in case of a power failure.

The vehicle construction has a modular architecture for energy supply to the electric system, thus allowing the optimal power source to be selected for each application and to be able to adopt any new technologies (e.g. fuel cell). The optimal power source for the application depends on the system configuration (peak-load and duration, charging time ratio), economics and environmental policy. The power source can range from full electric (batteries and/or capacitors) to hybrid concepts (diesel/electric or CNG/electric).

The main advantage of a full electric system is that it is more environmentally friendly as it has no emissions at the point of operation. The energy requirement of the system is considerably lower in comparison with traditional (manual) transportation systems. The (driving) noise is minimized ensuring a very quiet and comfortable ride. However, the operational range is relatively limited (especially when air conditioning is required in the vehicle).

A hybrid drive system resolves most of the issues concerning full-electric, battery powered vehicles. The range of the vehicles becomes larger and the battery life is less of an issue. Installing air conditioning on the vehicles is also facilitated more easily. However, the vehicles will no longer be emission-free at the point of operation. Other disadvantages that need to be addressed (and can be resolved completely) are noise and vibrations caused by the engine.

Typically 2getthere’s CyberCab will be a full-electric concept, with quick-recharging capabilities. Recharging will be performed at stations during load/unload and at specific buffer locations along the track. During the off-peak hours (usually at night) a full maintenance charge will be conducted.

Summarized

				Full-Electric					Hybrid Drive
Advantages:				Environmentally friendly					Superior range
				No exhaust					Easily facilitates air conditioning
				Low noise
Disadvantages:				Limited range / autonomy					Noise and vibrations
				Air conditioning (additional measures required to facilitate)					Exhaust
				Vehicle weight with batteries
System engineering for:				Air conditioning					Packaging
				(Water) cooling batteries					Noise and vibration reduction