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73 mph fuel use without throttle?

Discussion in 'Gen 4 Prius Technical Discussion' started by Chippingawayatlife, Mar 13, 2017.

  1. Chippingawayatlife

    Chippingawayatlife Active Member

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    2016 Prius
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    Two
    On the a large highway downhill above 73 mph, the ice turns on, but without throttle will it use fuel? I guess being fuel injected, it has to right?
     
    #1 Chippingawayatlife, Mar 13, 2017
  2. kevinwhite

    kevinwhite Active Member

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    2017 Prius
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    Four
    Actually being fuel injected gives the ECU the flexibility to turn-off fuel altogether if no power is needed from the engine. It will be in "fuel cutoff". The engine will be dragged along by the car.

    Above a certain road speed the engine needs to run to avoid over speeding MG1. For Gen 2 Prius this was 42mph for Gen 4 it is over 60mph.

    kevin
     
    #2 kevinwhite, Mar 13, 2017
    Chippingawayatlife likes this.
  3. fuzzy1

    fuzzy1 Senior Member

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    To this list, add 46 mpg for the Gen 3 Liftback. (I believe the PIP was higher.)
     
    #3 fuzzy1, Mar 13, 2017
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