Dynamo 9.0's motor

Engine

Modified scooter

The engine in DTU Dynamo started its life as a 50ccm scooter engine. Over the years however, the engine has been substantially modified by the students, and today only the header of the original engine remains. In other words, all other vital components have been redesigned by the students, including gearbox, crankshaft casing, fly wheel, etc. Even the programming of the car’s engine management system has been setup by the students themselves. Furthermore, the engine has been modified to run on the CO2-neutral fuel 2nd generation bio-ethanol E100 – a sustainable fuel type produced from agricultural waste products unsuitable for food.  

Comprehensive redesign

Engine and drive line (crankshaft casing, clutch/ clutch housing, gearbox, engine management system, etc.) have all been redesigned by students attending the ecocar course. This has been done in order to ensure that the engine has optimal running conditions and thereby reduce the amount of energy wasted in the form of friction and unnecessary resistance to an absolute minimum. Reducing these unnecessary losses of energy means that the engine needs to spend less energy powering the car and thereby spends less fuel in the process.

Engine type

Horizontally placed
1 cylinder
4-stroke
3 valves pr. cylinder
SOHC

Displacement

49ccm

Power output

App. 2,6 kW (3,5 hp) @ 4000 rpm

Torque

Ca. 3,7 Nm @ 3700 rpm

Bore/stroke

38.0/43.5mm

Compression ratio

Op to 14.0 : 1

Fuel consumption

Up to 665 km/l (fuel equivalents) on 2nd generation bio-ethanol (E100).