Quote:
Originally Posted by abently
The first part, I agree with, which corresponds well with any BSFC map.
The second part, I'm not sure load is the right word, losses may be a better term to stick with.
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Total load is equal to the work needed to propel the car forward, plus friction losses (won't expand this one for the sake of brevity, but it includes drivetrain losses, aerodynamic losses, rolling losses, friction losses inside the transmission, friction losses inside the engine, etc...), plus parasitic losses, plus pumping losses, plus throttle losses.
For the sake of fuel consumption, total load determines at what rate fuel is to be consumed. This is an open system, so rates apply.