Telco
Dedicated LVC Member
I don't think that you are going to get the advantages that you want without some batteries. Even with a generator setup, the batteries get you two things.
1. You recapture some of the energy lost in braking. Instead of all of it going to heat the pads and rotors, some of it can be used to recharge the batteries.
2. Batteries can supply extra power for acceleration, allowing you to use a smaller generator.
Otherwise, I doubt a generator/motor setup can do better than a continuously variable transmission.
True, but you would not need a battery pack large enough to run the entire car for 40 miles on battery alone. In the 1970s a guy used a 1950s tractor engine, a generator head, a jet starter and three standard car batteries to build a serial hybrid that netted 70MPG all day long at 45MPH. If this guy could cobble together crap parts and get that kind of power and fuel efficiency off a 36V system, then a purpose built 360V serial hybrid should be able to see a full size car get 100+MPG at highway speeds and be capable of running 140MPH. The battery pack only needs to be large enough to provide full power for the time period between when the operator calls for power, and the time it takes for the generator to respond. You wouldn't need a battery pack any larger than what would allow the car to run on battery only for more than 2-3 miles when set up as a serial hybrid. Knocking the 800-1000lbs that the huge battery pack is oversized by would also allow you to run a smaller generator set, which would get even better fuel economy.