Green Car Congress MercedesBenz reports on 3 3M km of BClass…

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Mercedes-Benz B-Class

25 November 2013

While Toyota and Honda seized attention over their of fuel cell rollout (in the case of Hyundai) and concepts (in the of Honda and Toyota) at the Los Angeles and auto shows, Daimler EVS27 in Barcelona as a forum to on its 3.3 million kilometers (2 million of experience with the Mercedes-Benz Fuel Cell fleet as as the main technical targets for the next generation fuel electric car. (Earlier .)

Mercedes-Benz began production of the F-Cell in 2009; 200 units of the were produced under production process at Mercedes-Benz and delivered to customers worldwide.

The vehicle had light modification to the integration of the fuel cell the hydrogen tank system as as the electric drive. The B-Class vehicle represented Mercedes-Benzs fleet experience. The earlier accumulated more than 2 kilometers (1.2 million in fleet testing.

In total (fleet testing developmental testing), the Daimler fuel cell fleet has more than 9.0 million km million miles).

Based on an more compact fuel system presented by Mercedes-Benz in its F 600 research vehicle in 2005, the 80 kW module in the B-Class F-CELL is 40% smaller, but develops 30% more output and cuts fuel by 16% compared to the A-Class stack. lifetime has increased to more 2,000 hours.

Comparison of the improvement between the A-Class and B-Class F-Cell. Source: AG. Click to enlarge.

The electric motor has a continuous / performance of 70 kW / 100 kW (94 hp / 136 hp) and a maximum torque of 290 Nm lb-ft). Range (NEDC) is 385 km miles) and refueling time is three minutes. The fuel-cell car a lithium-ion battery pack an output of 35 kW and a capacity of 1.4 kWh to boost and recover braking energy.

The fuel cell stack 440 cells connected in series, carbon-based bipolar plates. The air is an electric air compressor including power electronic, piping and cover. The compressor technology is a displacement screw which a clutch is connected to the electric

One of the main tasks of the operating of the stack is to maintain a defined level to avoid the drying out of the cell membrane or the flooding of Both cases would to performance loss and cause risk for permanent degradation. engineers developed the control in such a way that there is a well-defined balance between temperature, air and hydrogen flow and pressure of cathode and anode at individual load point.

results. The greatest number of the are in operation in California around Los All failures are tracked and statistically Reliability of the fuel cell has grown steadily during operation, Mercedes-Benz says. To improve the reliability of the fuel system, new components will be

Average fuel consumption of World Drive vehicles on continents. Source: Daimler AG to enlarge.

Fuel consumption of vehicle was tracked and clustered for continent; the results show the lowest fuel consumption was during the operation in the USA. The fuel economy is caused by the distant cross country operation at constant speed and a low of stops in combination with the limit. In some cases, consumption was less than 1 km.

In Europe the fuel consumption was a higher than the other due mainly to higher traffic with less constant and shorter cross country between cities and towns.

Mercedes-Benz B-Class

Observations on hydrogen infrastructure the fleet demonstration included:

The used with the demonstrations is not for the envisaged commercialization roadmap.

For customer acceptance convenient H 2 stations distributed across a area are needed.

Repair in case of a station breakdown to be shortened.

The purity of H 2 needs to be in a more detailed and bilateral way.

The compressor is the component fails most often.

forward. The next generation of cell technology, targeted for in vehicles for the market introduction, is development in the framework of the co-operation Daimler, Nissan and Ford Company, announced in January (Earlier post .)

The next generation system incorporate technology changes as as an improvement in packaging which allow the next-generation fuel system to be integrated in the front of the

Mercedes-Benz B-Class

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