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'B' mode and DRCC engine revving

Discussion in 'Gen 4 Prius Technical Discussion' started by roadwarrior28, Dec 29, 2016.

  1. roadwarrior28

    roadwarrior28 Member

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    Location:
    Portland, OR
    Vehicle:
    2016 Prius
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    Three Touring
    I've notice recently that engaging B mode or the DRCC slowing me down results in the ICE revving higher than it would under gas power. However, the battery still has plenty of room left to regen. Anyone else experience this?
     
    #1 roadwarrior28, Dec 29, 2016
  2. alanclarkeau

    alanclarkeau Senior Member

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    You wouldn't have it in "B Mode" if the battery wasn't fully charged, and even then only if there was a fairly steep decline in the road.

    If you're going down a steep hill, the DRCC will firstly engage REGEN braking, and if that isn't keeping the speed from exceeding the set speed, will cause the ICE to engine-brake. However, (unless you've got the model with speed control which I think might be Japan ONLY??) it won't use the friction brakes, but will exceed your requested speed - or you put your foot on the brake to slow.

    B Mode will force the ICE to rev, possibly up to redline, that's what it's designed to do. But it's not generally used it regular driving - I've used it for ½ a km in 9,000km driving.
     
    #2 alanclarkeau, Dec 30, 2016
    RCO likes this.
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