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Engine idle or switch off when in Electric mode

Discussion in 'Gen 4 Prius Technical Discussion' started by ongbenghui, Oct 12, 2016.

  1. ongbenghui

    ongbenghui Junior Member

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    I am curious for Prius Gen 4, does the engine actually idle when it is operating with Battery or if the engine is completely shutdown ? I am just curious.
     
    #1 ongbenghui, Oct 12, 2016
  2. alanclarkeau

    alanclarkeau Senior Member

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    From these simulations, it appears to stop completely due to the nature of a planetary gearset:



    Toyota Prius - Power Split Device

    It definitely doesn't run at traffic lights, it's silent.
     
    #2 alanclarkeau, Oct 12, 2016
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  3. pakitt

    pakitt Senior Member

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    It is completely off. In some specific situations it might rotate dragged by the wheels or the electric motors without the usage of any fuel.
     
    #3 pakitt, Oct 12, 2016
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  4. ongbenghui

    ongbenghui Junior Member

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    thanks thanks!
     
    #4 ongbenghui, Oct 12, 2016
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