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    • Garrett launching electric turbocharger (E-Turbo) in 2021 with mass market passenger application in mind

      The idea of a compressor powered by electricity is nothing new. Mass adoption of a turbo that uses electricity to instantly spin the compressor before having to wait for exhaust gases certainly would be new. That is what Garrett promises with the E-Turbo set to hit the market in 2021.


      What is the idea behind this? Classic sequential turbo setups in the past had a small turbo and a big turbo working in concert with the small turbo helping reduce lag before the big turbo got going and took over. The idea will be similar here.

      You can have a small motor with a large turbocharger and reduce the lag issue significantly with the E-Turbo getting things going in the low rpm range:

      Quote Originally Posted by Garrett
      Garrett has created an E-Turbo demonstration vehicle that is a successful representation of how an electrified boosting solution can increase engine power and torque while allowing the engine to operate at Lambda 1, providing energy recuperation to the vehicleís electrical system.

      Electrifying a turbocharger removes the constraint of needing a small turbine with excellent efficiency to drive the compressor at low flow rates. Instead, it allows us to right size the turbine for Lambda 1 rated power.
      Mercedes-Benz explored this idea back in 2015 and their M256 inline-6 engines designed in 2016 use an electric compressor. Mercedes refers to this design as an electric auxiliary compressor.

      The Mercedes design is more mild than what Garett will be introducing and we will likely see more and more powerful 'E-Turbos' from Garrett.


      Keep in mind the primary goal here is an efficiency gain and the E-Turbo goal is to improve emissions and fuel economy by 20%+ without a performance penalty.

      Garrett illustrates the key points here:






      Will we see a benefit in enthusiast cars and sports cars? Probably not initially as the mainstream application is for mass market passenger vehicles. The performance applications will come in time.

      Quote Originally Posted by Garrett
      The growing trends toward hybridization opens up possibilities to transfer electric boosting technology from racetrack to road. Garrett is pioneering E-Turbo technology to deliver superior performance, fuel economy and emissions, by integrating state-of-the-art, ultra highspeed electric motors and power electronics into itís turbocharger product families.


      Electrified Turbos (E-Turbos) show exciting potential and equal applicability in both light & commercial vehicles, in all fuels such as gasoline, diesel and natural gas (CNG).

      This article was originally published in forum thread: Garrett launching electric turbocharger (E-Turbo) in 2021 with mass market passenger application in mind started by Sticky View original post
      Comments 23 Comments
      1. yandizzle's Avatar
        yandizzle -
        I wonder what the mean time between failure is on this.
      1. F16HTON's Avatar
        F16HTON -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Frankly, calling this an electric supercharger makes more sense as exhaust gases are not spinning the compressor which gets going instantly.
        I donít know Joe, I see a turbine housing with an exhaust inlet, outlet and wastegate. I do not see any crank driven belts or gear drives.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        I don’t know Joe, I see a turbine housing with an exhaust inlet, outlet and wastegate. I do not see any crank driven belts or gear drives.
        Right but isn't there an electric compressor inside?
      1. F16HTON's Avatar
        F16HTON -
        Looks like electric center section which would provide full spool from zero RPM. Think of it as electric anti-lag.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        Looks like electric center section which would provide full spool from zero RPM. Think of it as electric anti-lag.
        Right but that center section should be called a supercharger, right? So it's like a supercharger helping a turbo spool.
      1. F16HTON's Avatar
        F16HTON -
        Here’s an electric supercharger.

        Attachment 59675
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by F16HTON Click here to enlarge
        Here’s an electric supercharger.
        Seems like they are basically attaching this to a turbo?
      1. vrsixxxxxx's Avatar
        vrsixxxxxx -
        believe it will function as a normal turbo however in the low range provide a faster spinning wheel then normally achievable at lower rpm say sub 3000. When factoring turbo size this could provide a great deal of power down low and up top.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by vrsixxxxxx Click here to enlarge
        believe it will function as a normal turbo however in the low range provide a faster spinning wheel then normally achievable at lower rpm say sub 3000. When factoring turbo size this could provide a great deal of power down low and up top.
        Ok my question is then the electric motor is spinning the same compressor the turbo uses? If so, it makes to call this an electronic turbo rather than supercharger.
      1. F16HTON's Avatar
        F16HTON -
        The Garrett image only depicts one compressor, one turbine and one shaft. I do not see these eTurbos as a gateway to power. It’s more of an efficiency. To spool a turbo you need to enrichen the air/fuel. Am eTurbo makes sense as you can remain stoich and still be making maximum pressure. Additionally the turbine/compressor shaft running the the eMotor will generate electricity to charge the battery/capacitor through regeneration.
      1. BLKROKT's Avatar
        BLKROKT -
        It’s a turbocharger with electric assist. That’s all.
      1. Sticky2's Avatar
        Sticky2 -
        So they supercharged a turbo... Just messing I'll edit the post.
      1. BLKROKT's Avatar
        BLKROKT -
        No, they didn’t. A supercharger is belt driven.

        This is an electric assist turbo.

        Why is that so hard for you to understand.
      1. Sticky2's Avatar
        Sticky2 -
        Click here to enlarge Originally Posted by BLKROKT Click here to enlarge
        No, they didn’t. A supercharger is belt driven.

        This is an electric assist turbo.

        Why is that so hard for you to understand.
        Superchargers are not only belt driven and quit trying to lecture me.
      1. BLKROKT's Avatar
        BLKROKT -
        Waaaah neg rep me some more you big baby
      1. BLKROKT's Avatar
        BLKROKT -
        Click here to enlarge Originally Posted by Sticky2 Click here to enlarge
        Superchargers are not only belt driven and quit trying to lecture me.
        Turbochargers are not only exhaust driven. Crybaby.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by BLKROKT Click here to enlarge
        Turbochargers are not only exhaust driven. Crybaby.
        Explain how this would still be a turbocharger without exhaust gases feeding it.
      1. F16HTON's Avatar
        F16HTON -
        Maybe a jet-driven compressor? Probably the most gray area.
      1. Bowser330's Avatar
        Bowser330 -
        Can’t wait to see someone with a gt3 slap this baby on for a little forced air, race gas should be plenty to cover for the boost
      1. subaru335i's Avatar
        subaru335i -
        This is exactly like the MGU-H from F1. It is for sure a turbo with an electric motor to help spool and will regen power from the exhaust stream when boost isn't needed.

        This is $#@!ing sweet.