The most important ingredients for the high energy efficiency of a vehicle are low weight, the small frontal area and a minimized cw-value. Friction components from the bearings in the power transmission and the wheels also play a role. And in all these disciplines, the selected components and the parameters of the TWIKE 5 defined in the design process will set the benchmark for other market participants. But what about the efficiency of the electrical components, e.g. motor, inverter and also the battery?
The designated performance data of the TWIKE 5 (vmax 190, 0-100 <4sec) do not suggest a low consumption at first glance. Experience shows that a large engine in internal combustion engines also needs more fuel due to the higher internal friction and larger masses. Even an electric motor cannot avoid these influences. However, an electric drive is already in a different league for system-related reasons and the influences have a less serious effect on consumption.
In order to assess the effects of the dimensioning and the interaction of all components relatively early, the metrologically determined characteristic values of the influencing components can be used in calculation models with load profiles known or agreed in practice, e.g. apply to the WLTP cycle, which defined for the standard consumption determination, but also to a more demanding load profile e.g. of a racing „Nordschleife“ and determine the expected consumption in the computational simulation. In these simulations, conclusions can also be drawn about the expected heating and the consequent cooling capacity to be provided.
Since the TWIKE 5 is supposed to break a lance for high-performance electrically powered three-wheeled vehicles, routes were selected for load profiles that are certainly not driven every day in practice. In Germany, the famous “German Autobahn” is known first, which in principle could be driven on at the maximum possible speed of the TWIKE 5 of currently targeted 190 km / h. The 20.83km long Nordschleife of the Nürburgring is also well known to insiders. And the climb of the 2,504 m high “Großglockner Hochalpstrasse” is a reference especially for challenging mountain climbs.
The TWIKE 5 should show its qualities on all these routes. This is already the case in current simulations.The lowest possible consumption has the highest priority in all efforts. If we succeed in transferring all theoretically based parameters into practice, then a consumption of less than 7.5kWh / 100km will set the bar for the following low-consumption vehicles.