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Down-Hill brake assist "B"

Discussion in 'Prius c Main Forum' started by SuperABM, Nov 13, 2012.

  1. SuperABM

    SuperABM Junior Member

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    I took my Prius c up the mountain to go snowboarding, (it surprisingly had no problem accelerating uphill by the way).

    On the way down I decided to put the Prius onto the "B" position (I remember the dealership telling me to use it for when your going downhill). Right away I noticed that the Prius seemed to drag a bit and I didn't have to press the break pedal nearly as much as I had been.

    Here are my questions

    Does this mode need to be used under a certain speed because I was going anywhere from 25-40 and I noticed the engine seemed a bit overly noisy almost like its overworking itself.

    Also should I worry about the battery overcharging because I heard that the Prius batteries work best not over or undercharged, I don't want to mess up my battery!

    P.s. I got 37 mpg uphill and 99.9 down hill and I'm not the type of person that drives all extra slow either ..
     
    #1 SuperABM, Nov 13, 2012
  2. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    #2 JimboPalmer, Nov 13, 2012
    SuperABM likes this.
  3. SuperABM

    SuperABM Junior Member

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    Thanks!.. Now when you say it won't overcharge do you mean it won't overcharge while using "B" or it won't overcharge period?
     
    #3 SuperABM, Nov 13, 2012
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    It won't over charge period, as the long answer says, it will switch to engine braking once the battery is full.
     
    #4 JimboPalmer, Nov 13, 2012
    SuperABM likes this.
  5. SuperABM

    SuperABM Junior Member

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    Thanks! Are you a Toyota mechanic? I read the other thread you posted in and you seem to know quite a bit about the Prius.
     
    #5 SuperABM, Nov 13, 2012
  6. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    No, I am a network consultant. I spend hours each day driving to customers and trying to visualize what my car is doing. Over the years I have experimented to try to prove my theories, but they are just my best theory. If the roads were busier, I would have less time to model the processes in my car. Once I get to the customer, I model their network, trying to visualize what they have done wrong.

    I spend a great deal of time alone in my head.
     
    #6 JimboPalmer, Nov 13, 2012
    ChinchillaGirl and ftl like this.
  7. Rob.au

    Rob.au Active Member

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    Network engineer for a telco here. I drive a desk, but I so hear you! ;)
     
    #7 Rob.au, Nov 14, 2012
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