MercedesBenz Bionic Concept Car (2005)

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Mercedes-Benz Bionic

Mercedes Bionic Concept Car

is using a new concept vehicle to the great potential of bionics for development, and has achieved outstanding for fuel consumption and emissions a combination of pioneering diesel technology and innovative emission methods. The Mercedes-Benz bionic car will have its world at this year’s DaimlerChrysler Symposium in Washington.

To realise the bionic car, the engineers at the Technology Centre and the DaimlerChrysler department have for the first looked for a specific example in which not only approximates to the of an aerodynamic, safe, comfortable and compatible car in terms of details, but as a and structural whole. The example at was the boxfish.

Despite its boxy, body, this tropical is in fact outstandingly streamlined and represents an aerodynamic ideal. an accurately constructed model of the the engineers in Stuttgart were to achieve a wind drag of just 0.06 in the wind

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

Mercedes-Benz Bionic Concept Car

utilised the findings from research during the development of the Bionic car, a fully and roadworthy compact car with a of 4.24 metres and space for occupants plus luggage. a Cd value of just 0.19, concept vehicle is among the aerodynamically efficient in this category.

20 percent lower consumption and up to 80 percent lower oxides emissions

In addition to aerodynamics and a lightweight construction derived from nature, the diesel engine and innovative SCR (Selective Catalytic Reduction) contribute to fuel economy and a reduction in exhaust emissions. In the EU cycle the concept car has a fuel of 65.7 mpg — 20 less a comparable series-production car. In with the US measuring method 75) the range is around 70 miles per US (combined), which is about 30 more than for a standard-production At a constant speed of 56 mph the direct-injection unit consumes only mpg — corresponding to a range of 84 per gallon in the US test cycle.

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

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

Great and low weight — a growth designed by nature

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

researchers examined this structure and transferred this to the Mercedes-Benz bionic car study the help of a special calculation The process is based on the principles of formation and for instance allows up to 40 more rigidity to be achieved in the door panelling than be possible with conventional If the entire bodyshell is calculated to this bionic principle, the weight is reduced by around one with undiminished strength and safety.

Streamlined and light, a fish in water — and environmentally friendly thanks to the diesel technology

Thinking the Looking beyond the horizon. familiar paths and giving new a chance: that is the philosophy of the technological leader among manufacturers.

For more than 100 years the lead of the Stuttgart company has based on the creativity of its engineers and on their enthusiasm for visions. of this has changed to the present and DaimlerChrysler specialists take up the to shape the future of the automobile on a basis. There are no limits in order to create trailblazing for even more safety, compatibility and comfort, they all the possibilities offered by technology and For experience has shown that free, interdisciplinary thinking to really outstanding results.

One project was the Mercedes-Benz bionic a concept vehicle based on in nature, in which DaimlerChrysler has transferred the diesel engine of the future to a fully functioning and car for everyday use.

Bionics a combination of biology and technology is a quite recent field of which has nonetheless already remarkable progress possible in areas. Nature has provided for high-strength materials, low-friction dirt-repellent coatings and practical fastenings, for example.

Many of inventions are based on more or accidental discoveries from the and plant world. For the first in the case of the Mercedes-Benz bionic the engineers at the Mercedes-Benz Technology (MTC) and DaimlerChrysler Research for a specific example in nature shape and structure approximated to ideas for an aerodynamic, safe, and environmentally compatible car. In words, this was not a matter of solutions but of a complete transfer nature to technology — a

The boxfish — angular but very streamlined

This teamwork: biologists, bionics and automotive researchers from disciplines embarked on an extraordinary into the animal kingdom soon led them into the of the underwater world — and them with a surprise. It was not the sleek swimmers such as the or dolphin that came to the ideals of the research engineers, but a that looks anything but and agile at first sight: the

It has its home in the coral reefs, and seaweed of the tropical seas, it has a great deal in common cars in many respects. It to conserve its strength and move the least possible consumption of which requires powerful and a streamlined shape. It must high pressures and protect its during collisions, which a rigid outer skin. And it to move in confined spaces in its for food, which requires manoeuvrability.

There is more to the boxfish meets the eye: despite its body, it is an excellent swimmer cube-shaped structure is by no means a On the contrary, the boxfish possesses characteristics and is a prime example of the inventions developed by nature millions of years of evolution. The principle of this evolution is nothing is superfluous and each of the body has a purpose — and several at once.

The outer of the boxfish consists of numerous hexagonal plates which are to form a rigid suit of This bony, armour-plated gives the body of the fish rigidity, protects it from and is also the secret of its outstanding as tiny vortices form the edges on the upper and lower of the body to stabilise the fish in any and ensure that it remains on course even in areas of turbulence. It does not need to its fins in the process, and can therefore its strength.

Applied to automotive the boxfish is therefore an ideal of rigidity and aerodynamics. Moreover, its anatomy is practically identical to the of a car body. And so the boxfish became the for a so far unique automotive development

Cd value: boxfish almost as as the ideal engineering shape

The sub-project tackled by the engineers at the Technology Centre and DaimlerChrysler concerned aerodynamics. In wind and water channels they how the attributes of the living model be transferred to an automobile.

The results are Despite its angular structure, the has almost as good streamlining as the water drop shape specialists consider to be the standard for the aerodynamic form. When to an open flow, this shape has a Cd value of 0.04. computer calculations and wind tests with an accurate of the boxfish, the Mercedes engineers a value which came close to this ideal, 0.06 — an outstanding It explains why the boxfish is such a swimmer and is so manoeuvrable with effort.

To make use of the aerodynamic the specialists in Stuttgart first a 1:4 scale model car whose substantially corresponded to the boxfish. The outside contours of the living were adapted in the area of the and side skirts, as was the prominent, rear end with its heavily sides and pronounced wedge

In doing this they disobeying important principles in aerodynamics, and were all the more at the results: the Cd value for the car was 0.095. In terms it was just as good as the — as measured on the ground considered ideal by aerodynamics (Cd 0.09).

The research model in the of a boxfish betters the drag of today’s compact cars by than 65 percent.

Cd 0.19: one of the most aerodynamic compact

The second round of the Mercedes-Benz car project now commenced. The task was to a full-size, roadworthy automobile on the of the boxfish contours — a equipped model for four with typical Mercedes in terms of safety, comfort, and day-to-day practicality, and equipped all the technology necessary for minimal consumption and the best possible compatibility.

The result of this vehicle project is a compact car two doors, four comfortable seats, a panoramic windscreen, a roof and a large tailgate 4.24 metres long, metres wide and 1.59 high. Naturally the exacting with respect to practicality, suitability and design made compared with the 1:4 model but the concept car still retains aerodynamic characteristics: with a Cd

of 0.19 the fully-functioning and driveable bionic car is among the aerodynamically efficient in this size In addition to the boxfish-like basic this result is made by a number of other aerodynamic e.g. rear wheels are almost completely shrouded sheets of plastic, flush-fitting handles and the use of cameras instead of mirrors.

Fuel consumption: mpg

In the Mercedes study, the optimal properties derived from the and a new lightweight construction concept from nature create the for a low fuel consumption and excellent Equipped with a 103 kW/140-hp diesel engine, the concept car 65.7 mpg (combined), making it 20 more economical than a standard-production model. In accordance the US measuring method (FTP 75) the is around 70 miles per US gallon which is about 30 percent than for a standard-production car. At a speed of 56 mph the EU fuel consumption to a mere 100.9 mpg per 100 kilometres corresponding to 84 mpg in the US test programme. The car has a maximum speed of 118 mph.

Mercedes-Benz Bionic

Emission control: 80 percent nitrogen oxides emissions SCR technology

The matter of exhaust was a further important task for the of the concept car. While the CDI engine already betters the EU 4 exhaust emission limits thanks to an oxidising catalytic and a particulate filter, the engineers in have an eye to the future and are testing an process which promises to even more exacting in the future, namely SCR technology Catalytic Reduction).

The centrepiece is a converter which uses an service fluid to convert the oxides (NOx): an aqueous solution is sprayed into the system in precisely metered depending on the engine operating This converts the nitrogen into harmless nitrogen and The result is an up to 80 percent reduction in NOx in the new European driving cycle.

is currently testing its SCR technology By this means, and with the operating fluid AdBlue, the oxides emissions of the direct-injection engine can be reduced by up to 80 percent. The aim of trials is to avoid the fuel disadvantages by optimising the in-engine processes. This is where car engineers are benefiting from the gained by their colleagues in the vehicle sector, where SCR is already in successful use. also intends to use the great of this process for diesel cars in future, and initially to offer SCR technology in the USA when the have been completed.

The fluid which allows catalytic combustion is named As only very small are required when on the move, the of the reservoir located in the spare recess of the concept car is sufficient for a corresponding to the service interval for a Mercedes diesel car.

structure: nature’s construction for rigidity and light weight

not only provides ideas for efficiency, but also gives for innovative lightweight construction Both the external armour-plating of the and the bone structures of other show how nature achieves strength with the minimum use of Bone structures are always in with the actual loads

In the case of the human thigh for example, the position and strength of the matter is precisely right for the and pressure loads which the must withstand. It is not only structures but also tree and roots that grow to biological laws — a lightweight construction strategy on the of nature.

In consultation with experts, DaimlerChrysler researchers developed a computer-assisted process for the growth principle used by to automobile engineering. It is based on the SKO (Soft Kill Option). simulation is used to configure and suspension components in such a way the material in areas subject to loads can be made less and can perhaps even be eliminated completely, while highly areas are specifically reinforced. bionic SKO process enables an component geometry to be identified meets the requirements of lightweight safety and durability in equal

The hexagonal scales of the boxfish obey the principle of maximum for the least weight. Transferred to the panelling of a car door, this construction principle produces a pattern with up to 40 percent rigidity. If the entire bodyshell is configured according to the SKO method, its is reduced by around 30 percent while retaining its exemplary crash safety and handling In this area too, can therefore make a further contribution to greater fuel

Technical specification

Length: mm

Width: 1815 mm

Height: mm

Wheelbase: 2568 mm

Engine 140 hp

Max. torque: 300 Nm @ 1600-3000 rpm

consumption (combined): 65.7 mpg / 70 mpg (US

0-100 km/h (0-62 8.2 s

Max. speed: 190km/h mph)

Mercedes-Benz Bionic
Mercedes-Benz Bionic
Mercedes-Benz Bionic
Mercedes-Benz Bionic
Mercedes-Benz Bionic

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