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Engine Oil Pump

Discussion in 'Gen 4 Prius Technical Discussion' started by Tansu K, Apr 14, 2022.

  1. Tansu K

    Tansu K Junior Member

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    hello everyone. I am writing you from turkey. I have a 2020 model corolla hybrid car. It is produced in Turkey. 4th generation hybrid. P610 with transaxle. It has an 1800 cc 2zr-fxe engine. I wonder something. Is the engine oil pump electric?

    Partsouq photo:
     

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    #1 Tansu K, Apr 14, 2022
  2. mr_guy_mann

    mr_guy_mann Senior Member

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    No, the oil pump is mechanically driven. It has a small chain from the crankshaft to sprocket on the pump.

    Posted via the PriusChat mobile app.
     
    #2 mr_guy_mann, Apr 20, 2022
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  3. Tansu K

    Tansu K Junior Member

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    contunually isn't stopping and starting very harmful for the engine?
     
    #3 Tansu K, Apr 21, 2022
  4. bisco

    bisco cookie crumbler

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    no, it was designed to do that for hundreds of thousands of kilometers
     
    #4 bisco, Apr 21, 2022
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  5. Tansu K

    Tansu K Junior Member

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    I would have preferred the oil pump to be electric.

    Istanbul's traffic is very busy. All roads are red on google maps. but my fuel consumption is 4.5 lt/100km. other petrol cars at least 10 lt/100km. diesel cars fuel consumption 7-8 lt/100km
     
    #5 Tansu K, Apr 22, 2022
  6. dacoobob

    dacoobob Member

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    an electrically-driven pump would be less efficient: converting the mechanical, rotational energy of the engine crankshaft into electricity, then converting that electricity BACK into the mechanical rotation of a pump would involve more losses than mechanically linking the pump to the crankshaft.
     
    #6 dacoobob, Apr 25, 2022
  7. 2010moneypit?

    2010moneypit? Active Member

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    Toyota has it figured out. To make the Corolla hybrid they used the same technology from the Prius. For the most part the Prius has been very reliable.
     
    #7 2010moneypit?, Apr 25, 2022
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  8. rjparker

    rjparker Tu Humilde Sirviente

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    In older engine designs with conventional oil, frequent start stop would be an issue. Better tolerances in Toyota hybrids and especially synthetic oil helps.

    Toyota made their water pumps electric as a method to combat thermal cycling which is a bigger issue. They also went to special cylinder insulators on gen4 for the same reasons.

    19A36D3B-7BE6-4E00-8955-C2DAE6743609.jpeg
     
    #8 rjparker, Apr 25, 2022
    Last edited: Apr 26, 2022
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  9. mr_guy_mann

    mr_guy_mann Senior Member

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    An electric oil pump would have to have a fairly large motor to supply maximum pressure and volume at high engine RPM. That increases cost and puts more load on the 12V electric system.

    There must not be enough gain vs cost to using electric oil pump - I have never heard of any car with this.

    Posted via the PriusChat mobile app.
     
    #9 mr_guy_mann, May 1, 2022
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