Does the Prius have an engine brake?

Discussion in 'Gen 3 Prius Main Forum' started by Paul Gregory, Apr 27, 2026.

  1. Isaac Zachary

    Isaac Zachary Senior Member

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    I didn't know you could double clutch the Prius.

    It could give me 3 down-hill options and do so without having to ride pedals, which is to me one of the main points of having an engine or regenerative brake option that doesn't involve a pedal. Like, if I'm going to have to ride a pedal to get the right amount of engine or regenerative braking, then what's the point of the B mode? Just incorporate the extra regen in one-pedal braking, which I hate. And yes, I've driven an F 150 Lightning with one-pedal braking and I hate it.

    Powerglides.
     
  2. ChapmanF

    ChapmanF Senior Member

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    On the way to becoming "full", the battery first passes a state of charge in the mid-70% range, where the car first begins increasing engine braking while decreasing charging current. That balance proceeds to all engine braking and no charging current at a state of charge of 80%.

    Readers interested in the details can find them here: How much engine braking a gen 3 is capable of | PriusChat

    ... and that it gradually replaces regen over the mid-70s to 80% SoC range as the engineers programmed it to, with no special action needed from you, the driver.

    What does 'prove' that the car behaves as the linked thread describes is not some absence of experience, but easily demonstrated repeatable experience.
     
  3. rjparker

    rjparker Tu Humilde Sirviente

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    We have been down this road before with the same passengers.
     
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  4. bisco

    bisco cookie crumbler

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    that's why I bailed out and turned on the ballgame. sox 5, jays 0
     
  5. PriusV17

    PriusV17 Active Member

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    What I do when going downhill is I turn on the AC. I've being doing this for a year now because of lots of downhill driving.

    My brake pads are from the last 95k check by dealer.

    How will you know how AC braking vs normal braking feels? Just try it out yourself. Find a safe place to test the brakes under normal mode. Then do the same under AC mode. Then do the same under EV and AC mode. Then try EV, PWR and AC mode. See how efficiently the car brakes under different setting. The goal is to drain excess electricity so that some energy is left to be used to brake the car using regen. Try to do this when battery bars are full to really know how efficient AC mode can be. You don't need to use AC everyday only when long downhill braking is needed and bars are at full.


    brakes.png
     
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