This is a prototype diesel-electric hybrid bus from DaimlerChrysler! The company plans to unveil the bus, the Citaro, the general public later this year. The bus has a sophisticated hybrid, which allows the bus to work in emission mode without the battery. Rather than providing continuous driving power, the diesel engine in the Citaro series hybrid operates as a generator to produce electricity when needed. Electrical energy is stored in lithium-ion maintenance free mounted on the roof of the Citaro. And not only the diesel generator, but also the recovery of braking energy.
The actual drive power to the wheels of the Citaro hybrid is by four electric motors of the wheel hub in the middle and the rear axle. Total engine power hub of the wheel 320 kW is sufficient for an articulated bus, even in arduous working conditions.
In developing and continuing the acceleration of the bus, hybrid bus can operate in pure electric mode, which is not only practically no emissions, but also much quieter.
The great advantage of smart technology used in the Citaro hybrid is reduced: for large 12-liter six-line normally used in the articulated model, the hybrid bus is equipped with a compact with a capacity of 4.8 liters. This reduces engine weight of about 1000 kg to about 450 kg.
As a diesel Citaro hybrid does not lead directly, there is no obligation to present the results of the summit, and is therefore able to act in a very low impact on the economic environment and on a beach regime close to or near its peak performance. The torque curve of the hybrid bus is often adapted to operate in a stable condition, the optimal level of emissions and fuel consumption.
The hybrid drive Citaro is able to forego a traditional automatic transmission. This leads to greater efficiency and weight savings. Reduce the number of components of the propulsion system means that the weight penalty Citaro hybrid bus over a conventional articulated buses with diesel engines is only about a ton.
After unveiling the prototype in the second half of 2007, pilot activities will begin early next year. Mass production is scheduled for 2009.
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