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Originally Posted by gonavy
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FWIW, I personally use CC religiously to ensure I stay at 60- the added benefit of DWL beyond that is minimal, and outweighed by the added concentration/effort reuired for me. I drove with the load for about 9 months before going back to CC, and my tank records show the lack of) difference. For me, the biggest boost was regularly driving as though my brakes were a last resort means of slowingthe car.
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This is why I'm looking at a modified cruise control. Having the driver in the loop leads to inconsistent results and worse. I've ordered a TI microcontroller that should be able to handle the Prius CC resistor network to implement some experimental cruise control laws:
1) 0-"n"
mph range based upon 'load' to let the car seek minimum fuel consumption
2) neutral glide to handle coasting
3) nibble down to 38 or up to 51 if speed is set in 39-50
mph range (Prius specific)
This microcontroller has the ability to record to flash and comes with a USB programming interface. My modification uses the microcontroller interfaces to sense and operate the CC resistor network. In the Prius, the CC takes digital up/down inputs and for safety, can easily be disabled.
Bob Wilson