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Almost always running hybrid idea.
Since engines are not efficient when they are cold it makes sense that the longer they run in between startups the less fuel is wasted. Also a lighter car wastes less energy accelerating and braking. So why not make a hybrid car that is primarily an electric car with a small light engine that runs continuously at its peak efficiency rpm until the batteries are charged (even when parked)? The idea is that the engine is so small that it only has enough power to supply 80% of the electricity needed while driving and only does charging when the vehicle is stopped or when the trip is over. This smaller engine will save weight and dedicating all its output to moving the car when driving reduce lost energy due to the inefficiency of charging the batteries.
The only problem I could see is parking this car in a garage or other confined space.
Thoughts?
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