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Coolant Fan PID and other PID fun

Discussion in 'Gen 2 Prius Technical Discussion' started by ddangelo, Feb 16, 2022.

  1. ddangelo

    ddangelo New Member

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    A couple of PID questions for you. I'm using the software that comes with my OBDMx

    I monitor my coolant temp while i'm driving and I live in CO, so big hills on I70. I got the temp up to 205 the other day going up a long steep hill - avg around 3000 rpm.

    would love to know - is there a PID that I can use to see if the radiator eletric fans are running. I found a PID that says coolant fan ON/OFF, will that show up as a 0 or 1? And what temp do the fans kick on? I know there's different speeds.

    Also - I'd like to know when the friction brakes kick in? I watch my regen Amperage and have noticed that it topes out at about 80 Amps, if I stay below 80 Amps, is that all regen? On long hills i'll feather the breaks to get more regen.

    thanks,
    dave
     
    #1 ddangelo, Feb 16, 2022
  2. ChapmanF

    ChapmanF Senior Member

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    More regen isn't always an unalloyed good thing.

    If you've got a long-enough downhill to more than fill the available battery capacity, then "more regen" will only do that faster, and it's gentler on the battery to regen a bit less, and still capture everything you could have captured by the time you're at the bottom of the hill.
     
    #2 ChapmanF, Feb 16, 2022
  3. ddangelo

    ddangelo New Member

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    I do this drive 3x times a week - i've perfected getting optimal regen so the engine doesn't go into high rev mode. once you get to 75% SOC or so, the engine starts to rev and then somehow the car starts even shedding 10A?
     
    #3 ddangelo, Feb 16, 2022
  4. mr_guy_mann

    mr_guy_mann Senior Member

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    I guess if you wanted to you could look in ABS data to watch apply pressure at each wheel.

    Energy from deceleration has to : go into the battery (until it's "full"), OR be turned into heat via the ICE (" braking" mode on the shifter, OR be turned into heat via the friction brakes.

    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Feb 20, 2022
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