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Old 06-08-2005, 09:26 AM
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Mercedes-Benz Bionic car concept 2005

The Mercedes-Benz bionic car as a concept vehicle: Outstanding values for fuel consumption and emissions based on the latest diesel technology and bionics

Washington, Jun 07, 2005
DaimlerChrysler is using a new concept vehicle to examine the great potential of bionics for automobile development, and has achieved outstanding results for fuel consumption and emissions with a combination of pioneering diesel engine technology and innovative emission control methods. The Mercedes-Benz bionic car study will have its world premiere at this year’s DaimlerChrysler Innovation Symposium in Washington.
To realise the Mercedes-Benz bionic car, the engineers at the Mercedes-Benz Technology Centre and the DaimlerChrysler Research department have for the first time looked for a specific example in nature which not only approximates to the idea of an aerodynamic, safe, comfortable and environmentally compatible car in terms of details, but as a formal and structural whole. The example arrived at was the boxfish.

Despite its boxy, cube-shaped body, this tropical fish is in fact outstandingly streamlined and therefore represents an aerodynamic ideal. With an accurately constructed model of the boxfish the engineers in Stuttgart were able to achieve a wind drag coefficient of just 0.06 in the wind tunnel.

In order to use this great potential for automobile development purposes, specialists at DaimlerChrysler first created a 1:4 car model whose shape was substantially based on the boxfish. During tests in the wind tunnel, a drag coefficient of 0.095 – a previously unprecedented value in automotive engineering – was measured for this clay model. It corresponds to the values achieved with highly streamlined shapes (Cd 0.09) and other aerodynamically ideal forms.

DaimlerChrysler utilised the findings from this research during the development of the Mercedes-Benz bionic car, a fully functioning and roadworthy compact car with a length of 4.24 metres and space for four occupants plus luggage. With a Cd value of just 0.19, this concept vehicle is among the most aerodynamically efficient in this size category.

20 percent lower fuel consumption and up to 80 percent lower nitrogen oxide emissions

In addition to superb aerodynamics and a lightweight construction concept derived from nature, the 103 kW/140-hp diesel engine and innovative SCR technology (Selective Catalytic Reduction) greatly contribute to fuel economy and a further reduction in exhaust emissions. In the EU driving cycle the concept car has a fuel consumption of 4.3 litres per 100 kilometres – 20 less than a comparable series-production car. In accordance with the US measuring method (FTP 75) the range is around 70 miles per US gallon (combined), which is about 30 percent more than for a standard-production car. At a constant speed of 90 km/h the direct-injection diesel unit consumes only 2.8 litres per 100 kilometres– corresponding to a range of 84 miles per gallon in the US test cycle.

DaimlerChrysler is currently testing its SCR technology worldwide. By this means, and with the additional operating fluid "AdBlue", the nitrogen oxide emissions of the direct-injection diesel engine can be reduced by up to 80 percent. The aim of these trials is to avoid the fuel consumption disadvantages by optimising the in-engine combustion processes. This is where Mercedes-Benz car engineers are benefiting from the experience gained by their colleagues in the commercial vehicle sector, where SCR technology is already in successful use. DaimlerChrysler also intends to use the great potential of this process for diesel passenger cars in future, and will initially be offering SCR technology in the USA when the trials have been completed.

"AdBlue" is an aqueous urea solution which is sprayed into the exhaust system in precisely metered quantities, depending on the engine operating status. This converts the nitrogen oxides into harmless nitrogen and water. The reservoir for this service fluid is located in the spare wheel recess of the concept car, and its capacity is sufficient for a mileage corresponding to the service interval for a current Mercedes diesel model. The Mercedes-Benz bionic car study is also equipped with a maintenance-free diesel particulate filter.

Great rigidity and low weight – a growth principle designed by nature

The boxfish, the aerodynamic model for the concept car, is also a prime example of rigidity and light weight. Its skin consists of numerous hexagonal, bony plates which provide maximum strength with minimal weight and effectively protect the animal from injury.

DaimlerChrysler researchers examined this bionic structure and transferred this principle to the Mercedes-Benz bionic car study with the help of a special calculation process. The process is based on the principles of bone formation and for instance allows up to 40 percent more rigidity to be achieved in the external door panelling than would be possible with conventional designs. If the entire bodyshell is calculated according to this bionic principle, the total weight is reduced by around one third with undiminished strength and crash safety.
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Old 06-08-2005, 09:57 AM
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more super-res pics !!! they were so big that even photoshop had problems handling them !!!!
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Old 06-08-2005, 11:41 AM
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Quote:
Originally Posted by drakkie
more super-res pics !!! they were so big that even photoshop had problems handling them !!!!
even i had problems uploading them - i wanted to make that thread yesterday but i wasn't able to upload pictures
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Old 06-08-2005, 11:49 AM
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Germany -> West Germany -> NRW -> Düsseldorf
...and the award for the ugliest Conceptcar of June 2005 goes to..... Mercedes-Benz for their Bionic Concept!
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Old 06-08-2005, 01:36 PM
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interesting method, fish have had millions of years to reduce their Cd.
this is called Biomimetics by the way.

do you have this image in hi-res? thanks
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Old 06-08-2005, 01:41 PM
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and i thought the B-Class looked bad, are they trying their hardest to do their worst?
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Old 06-08-2005, 02:01 PM
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I think its a good idea everyone should have bionic cars!
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Last edited by hec16; 08-20-2011 at 08:36 PM.
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Old 06-08-2005, 02:01 PM
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Quote:
Originally Posted by johnnyperl
do you have this image in hi-res? thanks
Unfortunately it isnt available at the media sites.
Therefore i dont have it, sorry.
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Old 06-08-2005, 02:13 PM
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Mercedes-Benz Bionic Car Concept #3:
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