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2017 Lexus NX 300h Hybrid Takes on The Gold Mine Hill Off-Road Review

Discussion in 'Lexus Hybrids and EVs' started by Tideland Prius, Jun 7, 2017.

  1. Tideland Prius

    Tideland Prius Moderator of the North
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    If you're curious what the NX300h can handle. Note that Nathan keeps mentioning it's the tires that can't grip. I suspect it's also the hybrid system that isn't providing enough power. I'll find another video comparing the RAV4 vs. RAV4 Hybrid.

     
    #1 Tideland Prius, Jun 7, 2017
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  2. Tideland Prius

    Tideland Prius Moderator of the North
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    Here's AoA explaining the differences between the AWD systems in the regular RAV4/NX and the hybrids

     
    #2 Tideland Prius, Jun 7, 2017
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  3. bhtooefr

    bhtooefr Senior Member

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    Considering he was spinning both axles, it had enough power.

    I'd guess that there wasn't any brake-based limited slip differential emulation, though, which could've helped. And, tires, really - anything that ships on there will be designed for street usage and occasional mud/snow.
     
    #3 bhtooefr, Jun 8, 2017
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  4. Tideland Prius

    Tideland Prius Moderator of the North
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    No there's no LSD. Again, it is meant for light duty AWD. It would be nice if it was a bit better at trails but really a traditional AWD like the RAV4 will have to do (without having to go to 4WD).
     
    #4 Tideland Prius, Jun 9, 2017
  5. bhtooefr

    bhtooefr Senior Member

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    Well, I knew there wouldn't be any real LSD, but brake-based LSD emulation is a thing. Basically, if wheelspin is detected, you can apply brakes to the spinning wheel, and torque goes to the other wheel.
     
    #5 bhtooefr, Jun 9, 2017
  6. Trollbait

    Trollbait It's a D&D thing

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    I've been curious about LSD, wait, you are talking about limited slip differentials.

    Ford is a mainline car company that makes use of this on their cars. They likely still stick with the limited slip option on their RWD trucks.

    With two motors on the rear, Honda's Sport hybrid system should easily be providing the benefits of a limited slip and locking differential.
     
    #6 Trollbait, Jun 9, 2017
  7. Tideland Prius

    Tideland Prius Moderator of the North
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    Doesn't it? It can regen the opposite wheel for a torque vectoring effect when turning in.

    It can regen 3 wheels (of various strength) and power the outside rear wheel for better acceleration out of corners.
     
    #7 Tideland Prius, Jun 9, 2017
  8. Trollbait

    Trollbait It's a D&D thing

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    It could and should, just haven't read much on it personally.
     
    #8 Trollbait, Jun 10, 2017
  9. bhtooefr

    bhtooefr Senior Member

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    Honda's Sport Hybrid SH-AWD is probably the one hybrid system that can do the most for handling, out of anything in any production car, due to having separate rear motors.

    Even the Porsche 918's hybrid system only has one front motor.

    However, you can get most of the effect - although less efficiently - through braking the spinning wheel using friction brakes. (Also worth noting that Toyota does know how to do this, although it seems that their system simply isn't as advanced as other automakers' systems.)
     
    #9 bhtooefr, Jun 11, 2017
    Last edited: Jun 11, 2017
  10. Trollbait

    Trollbait It's a D&D thing

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    In fairness, a car magazine doing extensive track testing managed to kill the brakes on a Ford with such a system.

    The AWD on the RXh is asymmetrical, and Toyota once had footnotes on the sites for this and the Highlander stating not to take it off road, because it is really just a tall wagon.
     
    #10 Trollbait, Jun 11, 2017
  11. bhtooefr

    bhtooefr Senior Member

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    It also depends on how aggressive the system is - Toyota's is purely reactive, hitting the brakes in response to wheelspin. Systems like the Ford system you reference, or Volkswagen's XDS system, predict based on expected forces where to apply brakes before the wheelspin actually starts. That'll burn brakes faster.
     
    #11 bhtooefr, Jun 11, 2017
  12. Trollbait

    Trollbait It's a D&D thing

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    To be fair, the Fiesta included in the following year comparison didn't have the issue, so improvements are ongoing.
     
    #12 Trollbait, Jun 11, 2017
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