Clever (automobile)
Image does not exist | |
Clever | |
Presentation year: | 2006 |
Vehicle fair: | |
Class : | Light vehicle |
Body shape : | Coupe |
Engine: |
Otto engine : (15 kW) |
Length: | 3066 mm |
Width: | 988 mm |
Height: | 1386 mm |
Wheelbase: | 2450 mm |
Empty weight: | 400 kg |
Production model: | none |
Clever ( Compact Low Emission Vehicle for Urban Transport ) is a small and light tricycle . It was developed by engineers from the Institute for Land and Sea Transport at the Technical University of Berlin .
technology
The basic idea was that the wind resistance is proportional to the cross-sectional area times the c w value . While the c w value had been improved up to then , the approach in the Clever project was to build a passenger cell in which two people sit one behind the other, thus saving more than 60% of the normal cross-sectional area.
Since such a narrow vehicle would tip over in curves, adaptive tilting technology is used. The front, larger part of the vehicle has only one wheel and can therefore lean into a curve like a motorcycle . The rear part of the vehicle, which houses the engine and the other operating technology, has a conventional axle that is only half as wide as that of a regular car or trike . In between there is a hydraulic tilting joint. A computer uses the radius of the curve and the driving speed to calculate the angle of inclination required to keep the vehicle in balance.
Clever is powered by a natural gas engine. It has a glass-fiber reinforced body on a chassis made of aluminum . This results in a low weight of only 400 kilograms.
Clever has an engine output of 15 kW and reaches a top speed of 98 km / h. It should be able to accelerate from 0 to 60 km / h in 6.5 seconds. The range is at a fuel consumption of 2.6 liters for 200 kilometers. The carbon dioxide emissions per kilometer are only 60 grams.
Passengers are by a safety cell with airbags surrounded after a tv n- credit report from 16 September 2006 already all EU - crash tests to have existed for vehicles. Due to its economical natural gas engine and good c w value, in combination with the small cross-sectional area, fuel costs of only € 8.00 should be incurred for the route Munich - Hamburg.
Project history
Nine institutes or companies were involved in the 4.5 million euro project:
Institute / company | Location | Responsibilities |
---|---|---|
TU Berlin Department of Motor Vehicles | Berlin | Project coordination, structural design, safety test |
BMW | Munich | Complete vehicle, construction of the test vehicles |
University of Bath Department of Mechanical Engineering |
Bath , UK | Chassis, tilting technology |
Cooper Avon Tires Ltd. | Melksham , UK | tires |
ARC Leichtmetall Kompetenzzentrum Ranshofen GmbH | Ranshofen , Austria | Structural components |
Takata Petri AG | Berlin | Restraint systems |
Institut Français du Pétrole | Vernaison , France | engine |
Weh GmbH | Illertissen | Gas system |
University of Natural Resources and Life Sciences Institute for Transport |
Vienna , Austria | Legal framework, acceptance, effects on traffic |
Five vehicles were built, one of which was built without an exterior panel and three other vehicles were subjected to crash tests. The fifth vehicle served as a presentation and demonstration object.
The last version of the website stored in the internet archive dates from the beginning of 2009.
literature
- Volker Schindler, Heiko Johannsen: CLEVER - A small vehicle for urban use . In: Volker Schindler (Ed.): Research for the car of tomorrow . Springer, Berlin 2007, doi : 10.1007 / 978-3-540-74151-0_3 .
Web links
- Website ( Memento of February 10, 2009 in the Internet Archive )
- Three wheels are enough , spiegel.de from November 30, 2005, accessed May 20, 2018.