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Old 12-25-2012, 09:23 AM   #17 (permalink)
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A question, how much heat energy is a Hypermiler like Pale Melanasian loosing in his Honda when he is averaging over 80 MPG? At EPA ratings the heat losss would be 60% to as high as 67%, but when you see what can be accomplished through Hypermiling then that same heat loss has been converted into movement of his vehicle.

If technique can reduce heat loss by say 50% then that 60% becomes 30%, not due to inefficiency in the engine, but due to inefficiency in the vehicle as a system. With sustained power requirements at less than 20% of available capacity, waste is inevitable.

I also think a lot of losses attributed to friction are losses due to reciprocation of the mass of pistons, a portion of the mass of connecting rods, hydraulic losses in oil circulation, as well as cam drive losses. All of these losses are greatly reduced by Hypermiling which minimises inefficient engine operation. Is it really the fault of the engine when you incorporate it into a poorly designed system. To me it's more like running your hot water all the time so you will have some hoit water when you need it, without waiting for the water to warm up.

regards
Mech
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