Clever (automobile)

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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:

Project participants
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