Is the TWIKE 5 really more efficient in everyday life than the TWIKE 3, although the new drive will have more than 10 times the power and also significantly more torque?
The fact that aerodynamics have a decisive influence, especially in the upper speed range, has already been highlighted in previous reports and will accompany our developers until the start of series production. However, the greater efficiency of the synchronous drive and the more modern power electronics make a major contribution to this lower consumption. We will take a closer look at this new drive system of the TWIKE 5 in a later article.
The following lines are intended to show how the interaction of all optimized properties and components will affect a possible extreme application. In addition to the usual daily commute to work, this could be, for example, a vacation trip with the aim of covering the longest possible distance within the shortest possible time. Events with high public profile, such as the e-Cannonball, give their participants the task of covering such long distances with the shortest possible charging stops in the shortest possible time. But the sustainable e-rally RIVE Maroc in Morocco is also based on the efficiency of the participating vehicles.
Image: Oschersleben Racetrack (source: TWIKE GmbH)
OSCHERSLEBEN RACETRACK ecoGP
For example, the ecoGP requires its participants to complete as many laps as possible within 24 hours not only on public roads but also on closed-off courses. A course that is the same for all participants on a closed circuit and a strict set of rules, e.g. drivers have to take a break after a maximum of 4 hours of driving, practically force a participating racing team to change drivers, bring a high level of safety to the race process and also allow the computational simulation of one expected race result. At least in theory. In practice, none of the mostly non-professional drivers will do such even laps over 4 hours of driving as the legendary racing driver Toni Mang did. Nevertheless, the simulation provides important information for an optimal driving strategy. And the result of this simulation looks extremely promising for a TWIKE 5:
TWIKE 5: 200 LAPS MORE
While the TWIKE Gerbil team with the TWIKE 3 was able to occupy 8th place with 443 laps during the Germany 24 Hours 2018 in Oschersleben (ahead of Jutta Kleinschmidt on BMW i3s, 439 laps), the TWIKE 5 could even do around 200 laps under optimal conditions cover more (see figure above).
The TWIKE 3 already has good prerequisites for this special discipline of the ecoGP: Consumption is low and the top speed is slightly above the target average speed. The maximum charging power of 22 kW prescribed by the regulations was provided with an external charger during the race. However, it had a negative effect on the TWIKE 3 that the speed had to be reduced in the corners and subsequent acceleration processes consumed valuable energy.
TWIKE 5: 5.3 KWH / 100 KM
The TWIKE 5 would achieve a significantly higher number of laps because the better aerodynamics and the better electrical efficiency of the drive and integrated charging system would bring decisive consumption benefits, especially in the speed range above 60 km / h. But also the high driving stability equivalent to a sporty car would allow more steady driving through curves and, due to the less fluctuating speed, higher efficiency. If a relaxed average speed of 56 km / h were targeted, consumption of around 5.3 kWh / 100 km would be expected (the TWIKE 3 required around 7 kWh / 100 km at a lower speed). Every 10 km / h faster would drive the number of laps and thus the maximum distance covered within the 24-hour race, but unfortunately also the consumption and thus the time on the 22 kW charging connection.
TWIKE 5 AT OSCHERSLEBEN RACETRACK: 1,585 KM IN 24 HOURS
If the prescribed driver change and a non-counted lap for each pit stop are also taken as a basis, the simulation results in a maximum achievable number of laps of 651 with a correspondingly rated distance of 1,585 km. We find this value sensational, taking into account the limited charging power of 22 kW!