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I always thought hybrid tech was perfect for heavy hauling. Reducing the need for a higher output engine just to accelerate or climb a grade should improve fuel economy and recapture on downgrades.
Why all the talk of a diesel engine operating under a wide load range? It would operate similarly to a turbine in that it would only run when needed to charge the battery, and during that time would operate at peak efficiency.
Another advantage of a hybrid design is to maintain cabin comfort without having to idle the engine.
The huge drawback to a hybrid design is that it weighs a lot more, and that cuts into the max payload the truck is allowed to haul. Since the primary purpose is to haul a load, this is not an insignificant drawback.
My question is, with all variables concerning payload and route being the same, what is the fuel cost per mile of a hybrid design compared to modern diesel-only tractors?
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