Hi, I’ve been thinking about a new vehicle concept for a long time and now I wanted to ask if my considerations were basically possible and feasible. The basic problem with today’s internal combustion engines is that they achieve an efficiency of up to 43% at full load. However, this full load condition will only be achieved in a small fraction of the entire driving time. With partial load, the efficiency drops to up to 20%. * Here would be inte Ressant, what efficiency can be achieved over (e.g. normal EU consumption cycle). Here I wonder if you can’t increase the efficiency of the engine. The solution would be simple: You always let the engine run at full load. Here I would start and use the well-known principle of downsizing. Replace a large-volume four-cylinder (e.g. 2.0 TDI 140hp/106KW) with a small two- to three-cylinder turbodiesel with 400-1000cm3. This would result in a capacity of 30-75 kW per litre. This motor then runs continuously on full load and could already have an efficiency of 43% throughout today. *Are higher efficiencies already possible with a long service life due to higher charges? Now you have the problem that you have a constant power source, but a very fluctuating consumer. A fixed connection via transmission and drive train would be practically nic This is why I would design the whole concept as an electric vehicle. The small internal combustion engine drives a generator continuously. It feeds its energy directly into 2 (also 4 possible as an all-wheel) wheel hub motors. Excess energy is stored on a small battery and, if necessary, is passed on to the wheel hub motors in addition to the power of the internal combustion engine. Thus, short-term performance as with a large-volume internal combustion engine (here 2.0 TDI 10 6KW) is possible. *Can anyone confirm or repeat my theory, does anyone have experience here? Due to the small internal combustion engine all components of the engine can be smaller dimensioned (example water pump, oil pump, entire exhaust gas cleaning system, also the fuel tank!) Also the weight saving brings a reduction of the consumption again. The complete system with small internal combustion engine, generator and battery should be smaller than today’s combustion engines together With the use of electrical auxiliary units, the efficiency of the internal combustion engine would increase further. I just claim that such a small combustion engine would be very close to the 50% efficiency. *Opinions on this?! In addition, you could also use alternative fuels (already established and tested). The big question remains, how high is the efficiency of the fuel. n Generator up to the wheel? How high are the losses on the generator, current converter, lines, (possibly battery charge or discharge) and wheel hub engine? How high would the efficiency of such a vehicle concept be? Thank you for your answers!