Why Fuel Injectors are AWESOME (28,000 fps Slow Mo) Part 1 – Smarter Every Day 281

Why Fuel Injectors are AWESOME (28,000 fps Slow Mo) Part 1 – Smarter Every Day 281

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37 Responses

  1. SmarterEveryDay says:

    3 Links to know about:
    1. https://www.patreon.com/smartereveryday You’ll notice it’s 100% supported by Patrons on Patreon. I’m grateful for that support and do not take it for granted! If you’re interested in supporting on Patreon, here’s a link!
    2. https://www.crosscreektractor.com/ Give them a call and if Jacob answers the phone tell him his hair is too long.
    3. https://www.smartereveryday.com/email-list – I send every new video out in an email! I won’t spam you.
    Seriously, thanks to everyone who supports on Patreon. It’s a big deal and I’m genuinely grateful.

    • Joe Gibbs says:

      Destin, I thought you were smarter than this!!!! That is NOT Internal Combustion. That’s EXTERNAL combustion! Sure am glad nothing happened. We want you around for a LONG time!

    • Ron Jones says:

      I feel sorry for the people that never had a teacher that could really grab their attention. You are one of the best.

    • Christopher Novak says:

      Hey Dustin, long time watcher here. Cool stuff, and even cooler to watch you test injectors from the Ford 3 cyl that I used to have.

      you probably already know this at this point, but a few things to note: I believe you mentioned port injection takes more pressure. That’s actually not true. With port injection you have the fuel under vacuum which helps atomize and mix the fuel as it gets sucked into the chamber, so it’s easier to run lower pressures. (Think like 50PSI)

      Direct injection (like you showed in this video) requires very high pressures to properly atomize the fuel mixture. (Think 1,000-30,000PSI) Some vehicles actually use both port injection and direct injection so they can eliminate the cons of using one over the other.

    • Mad Man Marine says:

      Thanks man!! This couldn’t have come at a better time. I am in the middle of designing a burner for my smelting forge. It needs to run on all fuels. Propane. Diesel. Kerosene. Waste oil. Vegetable oil. I want it to be extremely versatile. I have one of those diesel injector pop testers. It’s making me wonder what I can come up with to test nozzle design.

    • MNSweet says:

      That circle where fire can’t back up to I think is best compared to a hydraulic jump. But the fluid that is jumping is the air, not the gas.

  2. ThatDudeinBlue says:

    It’s so hard to explain how fuel is delivered to a vehicle if somebody has never seen it actually happen. This is literally the best showcase of how fuel injectors work. Amazing job. as always!

    • G D says:

      @Bryan Draughn When gases are rapidly compressed heat is generated. The opposite happens when gases rapidly expand. A great example can be seen as frost formation tire’s valve stem after removing core on an inflated tire.
      There’s an experiment you can perform with a device called a “fire pump” or “fire syringe”. I’m sure you can google it if you wish; but essentially take a pump and place a small piece of cotton in the chamber. If you depress the plunger fast enough the heat generated will be enough to ignite the cotton.
      Incidentally, the fire pump and this phenomenon has been known to man for thousands of years.

    • 1crazypj says:

      @bmxscape No, two strokes are simple.
      You can see the slots where fuel oil mix gets in. Some of the Suzuki and Kawasaki are a little bit more difficult to explain when they use centrifugal force to supply oil to big end bearings from a main bearing (Honda used same system for a long time on various motors and they are four stroke!)

    • Hero says:

      Atomized? Doesn’t seem that hard to me. “fuel gets put through a spray bottle so it’s misty and in contact with more oxygen. then compression or spark makes it go boom”
      Seeing it happen doesn’t change how simple that explanation is.

    • M R says:

      Which is all a con since LIQUID does not IGNITE, VAPOR does.
      Big Oil has keep us sheeped for decades; and will keep us for a few more until we transitioned into phase 2 of making everyone’s transportation Fully Electric; which is another half truth piece of tech.

    • ohse mix says:

      @Andreas Kist none of the once on the video were using electromagnetic valves. And even than you’d have to explain what an electromagnetic valve is.

  3. AntVenom says:

    Well, today I learned some of the fundamentals of fuel injection. Also, I was not expecting those finale slo-mo’s to be as extraordinary as they were.

  4. Fix This Build That says:

    I wonder how a flame would interact with laminar gasoline flow? Because there is no turbulence would it just never ignite, or maybe the flame being a flow of it’s own would disturb the laminar flow and cause the turbulence needed for ignition. These are the thoughts you make us think, Destin 😂

    • Hero says:

      @Ivan Barreras It’d still be flowing past a lot of unsaturated air so the gas would naturally kind of want to fill it. The BEST case open air scenario is a deep container with no air flow over it. Gas vapor is heavier than air so it’ll mostly sink and should somewhat stay contained without airflow disturbing it and allowing more to evaporate. Still, gasoline is probably the most volatile liquid I know of other than maybe alcohol. Any gasoline left in open air isn’t gonna be great news.

      But yes, the smaller the surface area, the slower it’ll evaporate. So laminar would definitely be best

    • Ivan Barreras says:

      @Hero  to his point. I guess laminar flow would best increase the chances of minimal gas build up given minimal surface area. So it would light. But I guess it would be the hardest to light of the flow patterns. Maybe. I’ve never done the test, just guessing

    • Hero says:

      Gasoline is INCREDIBLY volatile. It’d start to evaporate on the way down and the fumes would easily catch on fire. The liquid isn’t ever what ignites. It’s the gas coming off of it.
      It’s why you never use gasoline as a fire starter. If you wait more than a couple minutes, you have a massive cloud of gasoline vapor that’s literally ready to explode once lit.

    • Nick LDominator says:

      I wonder if the airflow would cause enough fumes to form and be ignitable around the flow 🤔🤔

  5. Greg Whitton says:

    Those were some of the clearest, crisp, sharpest slow motion images of fire I’ve ever seen. Absolutely beautiful and mesmerizing. I absolutely love this channel. Thank you Destin.

    • Mason Plant says:

      Not saying these shots aren’t fantastic, but I’d highly suggest you check out The Slo Mo Guys if you like that kind of high quality slo mo!

    • Devon Williams says:

      As a robot i find this video extreme attractive

    • Moje Imja says:

      you just made a certain pair of guys sad, slowly sad 🙂

    • Darksunrise says:

      It probably helps when the thing you’re filming produces it’s own light XD
      Half the difficulty to slow mo shooting is that each frame of video has so little time to collect light that things either need to be really well lit, or end up looking darker, or the shutter speed is adjusted for more light but blurrier images.

  6. Marcus Correa says:

    After, I dunno maybe 10 years, Destin still have me curious and fascinated with nature, science and engineering with the happiness of a child. My first and only “ring the bell” on youtube for a decade, and never regreted!

  7. sonan333 says:

    I love when a channel adds their own captions instead of relying on the auto-generated ones. Thank you.

  8. MotorBros says:

    What were the names of the two books you referenced? 12:54
    Thank you for always making your videos fun and descriptive at the same time. Your curiosity into every subject makes me interested to learn how it all works. I wish you were my science teacher in high school 🙂

    • MotorBros says:

      @Herman Von Petri thanks so much!!

    • Solo Renegade says:

      @Herman Von Petri Thanks!

    • Herman Von Petri says:

      Those are a set called “How Things Work” and there are at least four volumes in the set. They are credited to illustrator Roger Jean Segalat and originally published by Edito-Service SA, Geneva but released in the USA by Simon + Schuster, and George Allen & Unwin in England.

      How do I know? Because my dad gave me a set when I was younger and I have them in my hands right now. They’re wonderful!

    • MrAman47 says:

      I’d also like to know!

  9. Nurama says:

    I am so excited for more parts to this. Thank you for making such amazing videos. I dont always feel like I can chase my dreams to be smarter, but at the very least I can sometimes here. <3

  10. Jane Turner says:

    I adore you and your work so much. Any time I get to sit down and enjoy your content my day gets 100% better. Thank you for all you do! Also your Family and your Dad!

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