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Cruise Control Lurch

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by SpaceShip1, Jun 14, 2016.

  1. SpaceShip1

    SpaceShip1 New Member

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    New to the prius world. The cruise control has been lurching a bit right when I set it. I think it is maybe because I come off the gas right as I set it, and the engine jumps to catch up. It's sort of hard not to do that though. Anyone else experience this? Or should I get the transmission checked out.
     
    #1 SpaceShip1, Jun 14, 2016
  2. CR94

    CR94 Senior Member

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    That's correct. Try holding the accelerator steady a little longer to give the cruise control time to get its act together.
     
    #2 CR94, Jun 15, 2016
  3. DonDNH

    DonDNH Senior Member

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    I find that to be normal behavior. Hold the accelerator pedal until CC engages at your desired speed.
     
    #3 DonDNH, Jun 15, 2016
  4. ChapmanF

    ChapmanF Senior Member

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    'Lurch' is a good description. I've just moved from a Gen 1 to a Gen 3, and the Gen 3 cruise control annoys me slightly.

    The Gen 1 cruise control I could always engage without making any noticeable lurch, it would pick up at exactly the speed I was driving.

    What I've noticed with my Gen 3 is that any time I hit the SET switch, it seems to set a speed something like ½ mph faster than I'm driving at the time, and then it does a little lurch of acceleration to get there. Not only does the lurch annoy me, I also have to remember to hit the switch about ½ mph below the speed I want.

    I'm not sure why it does that—seems like with all the precision speed sensors all over the car, it would be easy to build a cruise control that got that right. I've wondered if somewhere in software it is rounding the set speed, and if I happen to be halfway between two whole numbers on the speedometer, it rounds up....

    -Chap
     
    #4 ChapmanF, Jun 15, 2016
  5. SpaceShip1

    SpaceShip1 New Member

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    Yeah mine does that too, unless I give it a little extra gas right before I set it.

    Now what is also weird, I've noticed when the cruise control goes from EV to ECO (the gas engine kicks on), there's a bit of a lurch too sometimes. You would think there would be some anti backlash setup to prevent that lurch right? Does anyone experience a lurch from electric to gas-electric power.
     
    #5 SpaceShip1, Jun 15, 2016
  6. FuelMiser

    FuelMiser Senior Member

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    Also, normal...
     
    #6 FuelMiser, Jun 16, 2016
  7. mrbigh

    mrbigh Prius Absolutum Dominium

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    In the previous 4 Prii I owned since 2005, the CC always had a seamless operation.
     
    #7 mrbigh, Jun 16, 2016
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