Placeholder Image

字幕列表 影片播放

  • Hey, it's me Destin. Welcome back to Smarter Every Day.

  • You've probably cranked a car engine thousands of times in your life, right?

  • You're familiar with that roar as the engine comes to life?

  • Have you ever thought about what's going on inside the engine?

  • Think about it. You've got thousands of explosions happening

  • every minute and they all come together

  • to make one unified sound.

  • Well today on Smarter Every Day, I wanted to learn what's

  • going on in an individual cylinder.

  • We kind of get a feel for how an explosion

  • propagates inside of a combustion chamber with the transparent potato gun video,

  • but for years, I've wanted to see inside of a working engine.

  • Today on Smarter Every Day, we're going to get to see this.

  • Someone posted on the Smarter Every Day

  • subreddit that there's a channel called

  • 805roadking that have created just this:

  • a transparent engine. So I loaded up the

  • high-speed camera and went to Cinnaminson New Jersey to meet Everett.

  • This looks like the right place.

  • (Destin): You Everett? (Everett): Destin! Hey, what's up I'm

  • D: how's it going? E: C'mon in.

  • E: we were just getting your phone because my phones are out

  • D: Hey, what's up? I'm Destin, nice to meet you.

  • D: How's it going? E: Pretty good. D: It's a pleasure to meet you guys.

  • Oh dude, you have a jukebox!

  • E: You like it? A 1953.

  • D: That's awesome! That's awesome!

  • E: I'll let you take a picture of it later.

  • D: (Laughing) How are you guys doing? Is this the shop?

  • E: This is it man.

  • D: Oh, it smells like freedom!

  • (Destin, voiceover): This is Everett. He works with his buddy Mike

  • to create all kinds of little mechanical marvels.

  • Their specialty is taking apart a single cylinder Briggs & Stratton engine from the 50s

  • and converting them into all different types of things.

  • For example, this one is turned into a hit and miss engine; which is really hard to do.

  • This one is an absolute frankenstein. They took four single cylinder engines,

  • chopped them up, and put them together to make one four cylinder engine that runs like a kitten.

  • It's amazing!

  • (Mike): The seam is actually right here. (D): And you welded that!? (M): Yeah

  • (D): How did you weld four engines together and then have it aligned so a crankshaft could go in there?

  • (M): It took a long time to do.

  • D: If you don't really appreciate what I'm saying here,

  • just understand these guys are doing very difficult things with very crude tools.

  • They're basically performing mechanical magic.

  • Which is why I wanted to see...this.

  • D: This is it, huh?

  • I love it.

  • (Voiceover): On a normal Briggs and Stratton engine,

  • the spark plug is right in the middle on the top of the cylinder,

  • and is fired by a magnet that moves past a coil.

  • These guys moved the spark plug so you can see down into the engine

  • and came up with a clever way to fire it with a buzz coil from the 1920's.

  • They're also running the cylinder on propane instead of gasoline

  • Because it's cleaner and it makes the engine last longer.

  • Now that we understand that this is basically a normal engine

  • that they've taken the metal head off of and replaced it with an acrylic head,

  • its time to get the high-speed camera set up

  • and see the one thing I've been wanting to see for several years

  • - an explosion inside the engine.

  • (D): I can't tell you how excited I am about this camera mount you built

  • (laughing) with its engine hoist.

  • It's like, it's the most acoustically-pleasing thing I've seen in a while.

  • M: I just triggered it.

  • (engine roaring in slow motion) (long roar followed by short sparks and more roaring)

  • (D, voiceover): Okay this is pretty and all,

  • but I want to understand exactly what's happening.

  • We have the piston on the left, moving up and down inside the cylinder,

  • and two valves on the right.

  • Let's take a look at how a 4-Stroke Engine works,

  • and count off each of the four strokes along with me.

  • The first thing that happens is one of the valves on the right opens,

  • allowing a fuel-air mixture to be drawn into the cylinder.

  • This stroke is called the intake.

  • When the piston gets near the bottom of the cylinder,

  • the intake valve closes, and then piston starts to compress the gas.

  • This is called the compression stroke.

  • The third stroke is the pretty one.

  • This is called the power stroke

  • the explosion happens and increases the pressure inside the cylinder

  • which applies force to the face of the piston pushing it down.

  • When all those gases have burned after that third stroke, the exhaust valve then opens

  • and the fourth- stroke called the exhaust stroke clears the cylinder of all those exhaust gasses.

  • The intake valve then opens back up, and the process starts over and over again.

  • Timing is everything in an engine to make sure it works properly. For example you want to make sure

  • the spark happens just before the piston is at top dead-center because

  • you want the pressure to be building up at the same time as that piston is ready to start moving back down.

  • When you hear a person talk about the advancing or retarding of the timing of an engine

  • that spark timing is what they're talking about.

  • If you look really closely you can see this part happens just before the piston reaches the top of the stroke.

  • I asked Everett and Mike if they would dare to run the engine on gasoline for me

  • because I wanted to see a brighter flame. I was really excited when they said yes.

  • And I was even more impressed when they said that they could change that engine over in just a matter of seconds

  • (D): so we're already converted, like, you're done? (M): that's it

  • (D): that was fast

  • (Slow motion engine. Burst of sound every time it lights up)

  • (Regular speed engine sounds)

  • (D): man that's good right there.

  • (Loud, rapid bursts)

  • (Electric spark sounds)

  • (Slow motion flame roar sound)

  • (D, voiceover): Ok now that you know how an engine works watch each of the four strokes and see if you can identify each one.

  • intake

  • compression (sparks sound)

  • power

  • exhaust

  • intake, compression, power, exhaust.

  • Now think about the engine in your car all the explosions are synchronized together to make that

  • one constant engine roaring sound.

  • I think what I found really refreshing about making this video is you've got Everett who is retired

  • and you got Mike and Bill who later came in the

  • shop and help us out these guys are

  • totally different generations but

  • they're all working together because

  • they absolutely love engines in, like, a

  • completely unapologetic way. It's

  • beautiful

  • anyway I'll leave links in the video

  • description to all of their YouTube

  • channels and I would enjoy it if you

  • would consider subscribing. They're small

  • channels that kind of thing would really help them out

  • (D): Big thanks to 805roadking for

  • helping me visualize an engine so, thank you very much

  • Bill, Everett, Mike, it was a blast

  • (Everett): This is dirtbike5100 and SmallEngineMechanic (D): oh yeah, there you go

  • these guys all have youtube channels

  • I'll leave links in the video description

  • I hope you enjoyed this episode of

  • smarter every day it was sponsored by

  • audible and the book I'm about to

  • recommend means a great deal to me.

  • You know, Everett and Mike they have this, you know

  • relationship even though their ages are

  • quite different.

  • My dad recommended that I read this book

  • a long time ago and it was fantastic.

  • It's about a young man trying to figure

  • out his way in the world in 12th

  • century Europe after his dad is taken.

  • We'll just say that. I don't want to give

  • anything away but it's called (Audiobook narrator): The Walking Drum by Louis L'Amour

  • (D): That is John Curless

  • and he does a dang good job reading this

  • book I enjoyed it. It's a thick book so I can't

  • really sit down and read this like I

  • used to be able to, but with audio books

  • I can listen to it back and forth on my

  • drive I've even listened to it while like bush

  • hogging the field I really enjoyed this

  • book it's full of fantastic quotes that

  • is just wisdom. I really enjoy it so

  • please get this book at audible.com slash

  • smarter (Cut) Psst, there's a behind-the-scenes

  • video on the second channel goes into

  • the timing of that engine, how they

  • adjusted to have a shape the acrylic all

  • that cool stuff (whispers) go check it out

  • Did we just figure out how to.. (E) I think we fixed it (D)... fix it with

  • back pressure? We fixed it with back pressure? (M): Look at that! (D): Oh! Look at that! (Indistinct speech)

  • It just needed back pressure?

Hey, it's me Destin. Welcome back to Smarter Every Day.

字幕與單字

單字即點即查 點擊單字可以查詢單字解釋

B1 中級

發動機是如何工作的--(通過慢動作看發動機)--每天更聰明 166 (How Engines Work - (See Through Engine in Slow Motion) - Smarter Every Day 166)

  • 2 0
    林宜悉 發佈於 2021 年 01 月 14 日
影片單字