Seatbelt | How does it work?

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  • čas přidán 30. 05. 2024
  • Everybody knows what happens in an accident if you don’t wear a seatbelt. What you see in this accident looks really painful in slow motion. Modern seatbelts are not just mechanisms which arrest your motion; rather. they cleverly allow enough movement to minimise internal injuries and help you land safely on an airbag. In this video, we won’t just learn the working of a seatbelt; we will learn why modern seatbelt mechanisms are designed the way they are. So buckle your seatbelt, and let’s start a design journey.
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Komentáře • 1,9K

  • @impastdeath
    @impastdeath Před 3 lety +5143

    The three point seatbelt was invented or designed by volvo and they left it patent free so that every vehicle manufacturers can use it

  • @swaygfx
    @swaygfx Před 3 lety +4322

    she really didn't see that boulder in the road tho?

    • @SackbotNinja03
      @SackbotNinja03 Před 3 lety +352

      She didn't have a door either

    • @1schwererziehbar1
      @1schwererziehbar1 Před 3 lety +327

      She's a woman, what do you expect?

    • @muchmore344
      @muchmore344 Před 3 lety +60

      @@SackbotNinja03 ahhh I didn't notice the missing door

    • @muchmore344
      @muchmore344 Před 3 lety +66

      @@1schwererziehbar1 bruh noooo, don't be sexist!!! for real

    • @vikki8470
      @vikki8470 Před 3 lety +45

      @@1schwererziehbar1 this seems logical bruh

  • @magicdolphin3090
    @magicdolphin3090 Před rokem +239

    Hats off to this girl, she risked her life multiple times just to show us how seatbelts work.

  • @justuslm
    @justuslm Před 3 lety +236

    There is a small mistake in this video: The seat belt pretensioner usually doesn't react to brake pedal movement, but rather to the airbag sensors. This means it only triggers when the g-sensors in the front of the car detect a collision, not before that.
    The advantage of this is that it doesn't go off in a situation where you brake strongly but don't have an accident, for example when you manage to prevent an accident. Since the pretensioner is a single-use device, such a maneuver (even in a voluntary driving safety training, rather than an actually dangerous situation) would make it impossible to use the pretensioner in an actual accident.

    • @cat-.-
      @cat-.- Před 2 lety +15

      I was thinking about this, thanks for the explanation.
      I have floored the brakes several times by now and I thought maybe my pretensioner has fired!

    • @matthewferos
      @matthewferos Před rokem +5

      My VW and my parents merc both pretention even without airbags going off and have done so multiple times, so they can’t be charge based systems there.

    • @davidcarter1738
      @davidcarter1738 Před rokem +2

      All true,but my 1999 is not connected to any electrical,works from ball action only

    • @saadmultani7251
      @saadmultani7251 Před rokem

      I was thinking about this.... thanks for clearing my doubt.

    • @wobblestone3148
      @wobblestone3148 Před rokem

      why do people not make the pretensioner multi usable?

  • @gaeb-hd4lf
    @gaeb-hd4lf Před 3 lety +1544

    Crazy how much thought and engineering goes into aparently simple things

    • @johannkuhn5685
      @johannkuhn5685 Před 3 lety +26

      And then the people who explain it get the whole pretensioner thing wrong.

    • @belovedtruth3447
      @belovedtruth3447 Před 3 lety +9

      @@johannkuhn5685 alright, now you explain it then..

    • @johannkuhn5685
      @johannkuhn5685 Před 3 lety +84

      @@belovedtruth3447 The pretensioner doesn't fire when you slam on the brakes, it fires with together with the airbags if the SRS detects a major impact. Just think about it this way, it's a pyrotechnic charge that yanks the belt tight. That mechanism and charge are single use, so if it fires when you slam the brakes (ie. before impact) you'll have to replace it after every emergency brake.
      In my experience the pretensioner is also not in the retractor, but part of the buckle on the side of the seat bottom. This also makes sense if you think about its purpose. The pretensioner is not there to take up slack at your shoulder, it's primarily there to take up slack from the lap section of the belt, so you don't slide under the seatbelt (known as submarining, and it causes MASSIVE internal injuries). If it yanks at the top, the friction at the buckle will interfere and it won't be nearly as effective. For this reason it yanks the buckle down.
      In a modern car, the inertia-based lock also operates in all directions, and it's farily sensitive. If the car experiences fast acceleration in any direction (so hard accelerating/braking, hard turning/swerving, rolling, etc) then the belt retractor locks, and will only unlock when you introduce slack by pushing yourself into the backrest. This serves two purposes. First it keeps you planted in your seat during aggressive maneuvers, and second it serves to "prime" the seatbelt in case the pretensioner needs to fire. If it only worked with the force of an accident, there would be a delay during which the belt freely unwinds before the mechanism can lock (keeping in mind how quickly an accident happens). Because of that the pretensioner would pull the belt out a bit further before the inertia lock has time to engage, which would drastically reduce its usefulness. But with the belt already locked the pretensioner will simply take up the slack.

    • @belovedtruth3447
      @belovedtruth3447 Před 3 lety +13

      @@johannkuhn5685 Wow, that's a good read. Thanks. They should've done more research i guess!

    • @johannkuhn5685
      @johannkuhn5685 Před 3 lety +11

      @@belovedtruth3447 Yep, I was quite surprised that they got it that wrong. I suppose it can happen, but then they should take steps to correct the mistake.

  • @bradnoyes7955
    @bradnoyes7955 Před 3 lety +747

    I see forms of this question coming out multiple times in the comments: "Will the seat belt pretensioners fire in a sudden braking event?" Short Answer: No. Long answer: The video is mistaken, the pretensioners do not fire before an impact, the airbags and pretensioners fire when (depending on the system) the vehicle's impact sensors are triggered and/or an accelerometer in the SRS module detects an impact. When the vehicle hits something, there is time between the initial impact and the vehicle coming to a complete stop. This time is the time in which the occupants of the vehicle must be safely decelerated from the vehicle's pre-collision speed to a stop. The most serious accident is when a vehicle hits a stationary 'non deformable' object (such as the rock in the video). If the vehicle had a 'rigid body' chassis (term used in theoretical physics to mean undeformable) then the vehicle and occupants would have to decelerate to zero instantaneously, resulting in massive injury or death to the occupants. Obviously this is theoretical, and the chassis of the vehicle bends and deforms, all the while decelerating the passenger compartment and therefore the occupants (this is the reason for crumple zones, they are sacrificial components of the vehicle intended to absorb the energy of the vehicle and decelerate it at a rate that is more safe for the occupants. This increases the time from which the initial impact occurs to when the vehicle & occupants come to a stop. During this time after the initial impact, the SRS (Airbag) module uses accelerometers, in many cases additional 'impact ' sensors, and occupant weight sensors (specific layouts vary from manufacturer to manufacturer and model to model) to compute the severity of the accident, determine which aribags/pretensioners to deploy and in some cases how quickly to deploy them (some aribags have multiple stage deployments) , all in fractions of a second (down to as little as 10ms in some cases) and before the force of the impact reaches the passenger compartment.
    Edit: Note some vehicles do not use 'pyrotechnic' pretensioners (pretensioners that use an explosive charge like the pretensioners described in this video). These Vehicles have different controls, and I am not familiar with these systems.

  • @alok4110
    @alok4110 Před 3 lety +335

    Is no one gonna talk about how much accidents she went in for us

  • @Serenity5460
    @Serenity5460 Před 3 lety +173

    Hey man, 7 years ago I was really wondering how this works. I couldn’t find anything on the internet that was accessible to me and even my physics teacher didn’t know.
    But I’m very proud to say that my 14 year old self figured out the part with the steel ball.
    Thank you for your animation, this was really interesting!!!

    • @Chris-rg6nm
      @Chris-rg6nm Před rokem

      7 Years ago was 2015, there HowStuffWorks explains it all in an article on their site form 2002

    • @somebody_2837
      @somebody_2837 Před rokem

      @@Chris-rg6nm 7 years ago from the time he had posted this comment was probably 2013 or 2014, not 2015.

    • @Chris-rg6nm
      @Chris-rg6nm Před rokem

      @@somebody_2837 Thats still past 2002

    • @somebody_2837
      @somebody_2837 Před rokem

      @@Chris-rg6nm Correct, but I was just saying.

  • @kogure7235
    @kogure7235 Před 3 lety +1025

    Don't you hate it when there's a massive boulder in the middle of the road

    • @shahriarhussain2366
      @shahriarhussain2366 Před 3 lety +7

      when you missunderstand field with road😹

    • @prestondeters5093
      @prestondeters5093 Před 3 lety +25

      It sometimes happens when you live in the Rocky Mountains.

    • @patman817
      @patman817 Před 3 lety +16

      @@prestondeters5093 also happens when while e coyote drops a rock on the road

    • @belovedtruth3447
      @belovedtruth3447 Před 3 lety +3

      @@patman817 Stop picking on Brave Wilderness!

    • @bakoty6571
      @bakoty6571 Před 3 lety +2

      No

  • @user-ez5vq9fd2t
    @user-ez5vq9fd2t Před 3 lety +997

    She's braking with her left foot...

    • @harshmadnani1613
      @harshmadnani1613 Před 3 lety +149

      Its self-explanatory... See your first word😂

    • @JKTCGMV13
      @JKTCGMV13 Před 3 lety +29

      Harsh Madnani haha sexism 🤣🤣

    • @user-xx9oe3mj7s
      @user-xx9oe3mj7s Před 3 lety +97

      She's probably a pro rallye driver

    • @Ristic-io7sy
      @Ristic-io7sy Před 3 lety +7

      ZOMBIE GUT kill but u have to move foot from your gas pedal

    • @DashCamSerbia
      @DashCamSerbia Před 3 lety +27

      That is a clutch pedal on the left...

  • @ArvinAsh
    @ArvinAsh Před 3 lety +974

    Very well explained. Nice job!

  • @kkoz66
    @kkoz66 Před 3 lety +229

    Lost my father to him not wearing his seatbelt, my life would have been much different if he would still be here. I don't know why anyone wouldn't wear a seatbelt your chances of surviving are so much greater.

    • @humblekid2140
      @humblekid2140 Před 3 lety +12

      sorry to hear that. please make sure you pass this message inperson as well

    • @IonorReasSpamGenerator
      @IonorReasSpamGenerator Před 2 lety

      There are instances where not wearing a seatbelt saved lives, but sure, on average you are much better off using them...

    • @clipsahoy1
      @clipsahoy1 Před 2 lety +40

      @@IonorReasSpamGenerator
      Yes, there are also instances where flying out of a moving train has saved someone’s life, but generally it’s not a good idea. Same with just about every safety measure

    • @tomelifeisjustonebig
      @tomelifeisjustonebig Před 2 lety +4

      But he had his freedumb.

    • @kkoz66
      @kkoz66 Před 2 lety +9

      @@IonorReasSpamGenerator good thing people can pick what kind of accident they want

  • @manjunathsanjeev5234
    @manjunathsanjeev5234 Před 3 lety +714

    Finally we got a new girl to drive your cars.

  • @oekfoh8684
    @oekfoh8684 Před 3 lety +22

    Never in my lifetime would I figure out how to design something as simple as this

    • @LD-xt1vo
      @LD-xt1vo Před 3 lety

      I'm with you on that one!

  • @suavesoft
    @suavesoft Před 3 lety +20

    The ball bearing is absolutely ingenious! Simplicity at its finest.

  • @ericbasilio5062
    @ericbasilio5062 Před 2 lety

    it is hands down the best channel on CZcams! Every video I watch makes me feel 10 times smarter

  • @infantnelson9356
    @infantnelson9356 Před 3 lety +13

    Really loved that illustration. Thanks to make easy understanding, how seatbelt is most important.

  • @knetknecht2687
    @knetknecht2687 Před 3 lety +81

    This high quality video is the kind of content, which is needed on CZcams. Not those reaction vids, let's plays or beauty blogs.
    Good job!

    • @gaeb-hd4lf
      @gaeb-hd4lf Před 3 lety +2

      Damn right

    • @Dimaz42
      @Dimaz42 Před 3 lety +16

      well, different videos cater to different audiences, and people have preferences and need entertainment

    • @redbean9410
      @redbean9410 Před 3 lety +10

      no one is forcing you to watch those reaction vids.

    • @Gentapi5
      @Gentapi5 Před 3 lety

      @Eric Mirettouche

    • @L4byrint
      @L4byrint Před 2 lety

      @@Gentapi5 lllllmlllllllmlllmllmommlllmlmlmllllmmm

  • @greathorton
    @greathorton Před 3 lety +3

    Incredible engineering design, the developer were appreciated.

  • @avimango46
    @avimango46 Před rokem

    A recent car accident in Gujarat state of India when a famous industrialist was killed and the reason was the non-fastening of the seatbelts by rear passengers. With this background, people are getting paranoid about the working of seatbelts! There is a doubt if the seatbelt shall operate or not in case of crashing of the vehicle! Whenever one sits in a unknown car one should apply a quick tug and the locking mechanism will lock the belt. Seatbelt is a simple mechanical device based on centrifugal force- no sensor, no electronic signal etc etc.A quick tug and the locking mechanism will tell you that it is working as required.
    Knowing fully well about functioning of Seat Belt one should never forget to put on the seat belt before starting the vehicle. Your video has explained it in all respects ! Thanks 🙏

  • @Nikkk6969
    @Nikkk6969 Před 3 lety +439

    Anyone else’s seatbelt lock up sometimes when your not doing anything

    • @ProtoMan137
      @ProtoMan137 Před 3 lety +69

      Like breaking at a T crossing and leaning forward to see crossing traffic? Yes.

    • @aryamanmehra6826
      @aryamanmehra6826 Před 3 lety +1

      Proto Man 😂

    • @wonniewarrior
      @wonniewarrior Před 3 lety +10

      Or a middle seat seat belt jammed because your station wagon rear seats fold down, shortening the length furthur while it down, so getting the seat back up leaves it permanantly jammed. This is for those middle seats with seat belt fitted into top of folding seat. Other ways it jams, is when you are at a intersection with a camber or slope sideways meaning seatbelt inadvertantly does it job, so you cannet lean forward for better view around parked cars. But I trust the seatbelt with my life, because it original design was simple, and if simple works, then it smart. Thank you Volvo for not patenting (or trademarking ?) the 3 point safety belt, but instead allowing other car manufactuers to use their design for all our safety.

    • @KashifNawaz85
      @KashifNawaz85 Před 3 lety

      Yep my 2016 Sonata.

    • @imthiyazahamed4248
      @imthiyazahamed4248 Před 3 lety +15

      When we haven't buckled the Seat Belt and see Police standing in front and when we try to suddenly pull the seat belt, it will lock. We end up paying Fine

  • @iijj
    @iijj Před 3 lety +3

    Several hours ago I in my car wondered how does a seatbelt work. Now I opened CZcams and the first thing I saw in my subscriptions is this video!

  • @Xanthopteryx
    @Xanthopteryx Před 3 lety +7

    Fun fact:
    Volvo have electric pretensioners on newer cars. So the car can actually pretension the belt BEFORE an accident has happened. They also have, since long back, TWO explosive devices - one at the top mount (as shown here in the video, where the roll is) and one at the bottom mount (where it is fastened between the door and the seat). This is because this saves lives since it tension the belt in a better way.

    • @borosadam
      @borosadam Před 2 lety

      Produced by Autoliv :)

    • @ashishkumar-yn5vm
      @ashishkumar-yn5vm Před 2 lety

      i really confused with the combined effect of pretensioner and torsion bar, as torsion bar is provided to absorb rigidness from innitial impact to standstill of vehicle, so that passengers wont get much hard force. and allow them to fall forward to a rate that air bags will fully deploy. but using the pretensioner at the time of innitial impact is like countering the effect of torsion bar, one place enggineers are allowing seat belt to fall forward slightly, another case they are tightening it. please someone explain where i m wrong in my understanding of torsional bar n pretensioner

    • @Xanthopteryx
      @Xanthopteryx Před 2 lety

      @@ashishkumar-yn5vm First, you want to hug hug the person, as much as you can. As tight as possible. First you have to overcome the fact that people just do not put the belt on properly, so it is not tighten to your hip and body, then you must overcome clothes that also have an impact of the tightness of the belt. Then you have to overcome people leaning out from the chair.
      So, pretension system and explosive devices try to fix all this (but YOU still should unzip thick coat(jacket and then buckle up and then tighten the belt so it is firmly in place).
      Then you crash and everything pull you into the seat as much as possible, because you should move as little as possible to start with. Then you have the flexing of the entire system to help you slow down in a controlled manner (if you have slack of the belt you will first just fly uncontrollably forward until the belt catches you and that is BAD) together with the deformation zones and then finishing with the airbag.
      To see what happens when the seat belt does not proved the correct holding force on you, look at crash tests of Tesla Model S. They failed twice(!) because of bad seatbelts. They redesigned the system between crash test 1 and 2. After crash test 2 Elon said that the test was faulty...........

  • @DocHoliday-to6kp
    @DocHoliday-to6kp Před měsícem

    Been driving a 1967 GTO for so long i had no idea this stuff was even on the newish Jeep.
    Thanks for the great explanation

  • @derwolf200
    @derwolf200 Před 3 lety +13

    6:25 Looking at the massive wobble movement of the front wheel, I am sure even if she didn't crash into the boulder, this imbalance means that her lug nuts are so loose that the front wheel will fall off in less than a mile of normal driving anyways. ^^
    No just a joke, love your great animations and couldn't do it better, thats just one thing that fell into my eyesight.

  • @SaquanJackSayquan
    @SaquanJackSayquan Před 3 lety +12

    Who tf invented that orange mechanism! That some genius right there I always wanted to know how that works

    • @u1zha
      @u1zha Před rokem

      Weird that it needs such a oddly shaped plate. I thought it was going to be a simple ratchet that swings outwards due to centrifugal forces. Governors (devices for steam engine speed control, exploiting centrifugal force) predate cars.

  • @pedromatos3871
    @pedromatos3871 Před 3 lety

    This is one of the best channels on CZcams! Congrats from Brasil!

  • @wintensisty3443
    @wintensisty3443 Před 2 lety +3

    3:10 We can also test this mechanism works in your car by parking at very steep downhill. and try to pull the seat belt slowly... It just happend to me by chance and came to know about it...

  • @SVAyouTube
    @SVAyouTube Před 3 lety +176

    🤔 BMW refuses to use a driver door, but made a genius technology to safe the computer girl

    • @a_r_u_n7595
      @a_r_u_n7595 Před 3 lety +16

      Also they didn't install ABS. Look at the wheel it's get locked up

    • @Arhey
      @Arhey Před 3 lety +2

      @@a_r_u_n7595 And front wheel isn't balanced.

    • @rogermorales8132
      @rogermorales8132 Před 3 lety +1

      Computer girl fine

  • @Tscheche89
    @Tscheche89 Před 3 lety +7

    so much thought into something as "simple" as a seat belt...awesome vid

  • @hasnakaamarasinghe9642

    Very helpful information.By chance I met this channel today and watch two videos so far. It gave me more details. Definitely will be watching all videos. Keep it up

  • @sebastiannielsen
    @sebastiannielsen Před 2 lety +2

    About the second mechanism - its not added just for "testing", and its not added just because if the first mechanism with the ball fails. The second mechanism exist in case the first mechanism doesn't trigger. The first mechanism might fail to trigger (a so called false-negative) without the mechanism failing itself, for example, if the crash/accident come in a slight angle, causing the ball to not correctly catch the lever. In some cases, the centrifugal locking mechanism and the deceleration detection might even be the same mechanism. The ball mechanism is required because if the passenger is wearing loose/fluffy clothes (like a thick winter jacket), it might not accelerate the belt enough fast to trigger the centrifugal mechanism in time.
    One very common accident that the ball mechanism may fail to detect, is the "left broken light accident during night", which is a common accident during nighttime. When a car's left light is broken (from the point of view of the driver of that car), the car might during the night look like a MC. A second car might then try to overtake (for example a MC on their side of road). This will cause a very specific front-to-front accident where the left corner of his car crashes with the left corner of second car (note: from the point of the view of the drivers in each car. His left, second car's left hits each other). This will cause a counterclockwise rotation (on those countries with right-hand traffic, in left hand traffic it will be a clockwise rotation when cars right hits the other car's right) of both cars.
    This would of course cause the ball to fling in a about 45 degree angle from the lever due to the centrifugal force AND deceleration force combined, thus the lever will NOT trigger.
    thats why BOTH the ball mechanism AND centrifugal mechanism is required.
    In some cases, the ball mechanism may even have a electromagnet or solenoid, or a rod connected to the pre-tensioner, that positively triggers the mechanism upon a accident detection.
    With "positive trigger", it means that the mechanism doesn't rely on weight, gravity or centrifugal force to trigger, but its simply a piece of material moved into the mechanism that will push the lever into the wheel, or a rod that moves into the central plate causing it to immidiately go out of position, so the mechanism can never false-negative during trigger (even if the mechanism can fail, for example broken solenoid, or the lever breaking off as shown in the video).
    And also about the belt tensioner, in those cars that use the brake pedal to detect a oncoming accident, they use a electric pre-tensioner in addition to the pyrotechnic one. The pyrotechnic one only triggers during a positive accident, which means usually a collision sensor must be deformed, so the car can be 100% sure its a accident and not just a hard brake.

  • @jinyoungkim7766
    @jinyoungkim7766 Před 3 lety +12

    This is amazing. I was surprised that a lot of mechanisms (more than I thought) are used in seat belt. Thank you a lot!!!

  • @swaggydraggy69
    @swaggydraggy69 Před 3 lety +140

    This lady doesn’t seem like a very good driver, she crashes into a large rock in the road many times. She also doesn’t put a foot on the dead pedal.

    • @joaquinandreu8530
      @joaquinandreu8530 Před 3 lety +4

      Plus she is using the left foot to brake. She would not had passed her driving text IRL.

    • @chanakyasinha8046
      @chanakyasinha8046 Před 3 lety

      She is alexa, i think.

    • @haidang93nd
      @haidang93nd Před 3 lety +3

      Nobody notice the door is gone

    • @belovedtruth3447
      @belovedtruth3447 Před 3 lety +2

      What's a dead pedal? Oh, noob drivers' resting place?

    • @mikekartwii
      @mikekartwii Před 3 lety +2

      you're all wrong thats a manual car and the left foot is on the clutch pedal, which needed to get pushed down everytime you brake

  • @ComMando9100
    @ComMando9100 Před 3 lety +5

    I love these kind of videos, they are interesting, visual and keep up your attention. This is how teaching should be in schools instead of just reading and memorizing and just copy paste it onto a test paper from memory, then forget about it as soon as you passed your test.

  • @spyrgelispyy
    @spyrgelispyy Před 3 lety

    This is the best explanation I found on the internet!

  • @DanielSantos-nm2fj
    @DanielSantos-nm2fj Před 3 lety +32

    Very interesting, hope to see more of this type of videos.

  • @kvnptl4400
    @kvnptl4400 Před 3 lety +3

    Hey, thanks for your informative illustration on a seat belt working. This uses the fundamental design of mechanical engineering. I studied gear and belt movements but your video shows its real-life application. Once again thanks for sharing knowledge in an animated way.

  • @NickMaovich
    @NickMaovich Před 2 lety

    wow this is the best explanation you can get. Thanks!

  • @jackzhao604
    @jackzhao604 Před 3 lety +1

    Take a minute to appreciate the engineers, it takes a good amount of thinking for me to look at them and understand it but they came up with these out of nowhere

  • @nathan8750
    @nathan8750 Před 3 lety +2

    Simple yet intelligently put together for anyone to understand with amazingly simple visuals so we can follow along. Bravo

  • @deathtoy101
    @deathtoy101 Před 3 lety +83

    not gunna lie tho that animation girl is kinda cute

    • @Angel-zv2yi
      @Angel-zv2yi Před 3 lety +25

      deathtoy101 I won’t be surprise if the author also create +18 content for other projects or hobby.

    • @tullo5564
      @tullo5564 Před 3 lety +1

      Ángel hahaha

    • @tullo5564
      @tullo5564 Před 3 lety +3

      Ángel I need a link to that for educational purposes of course

    • @christianpetersen163
      @christianpetersen163 Před 3 lety +2

      Before crash: That's my new girlfriend.
      After crashing into the same boulder 3 timed : IT'S JUST THAT I THINK WE SHOULD SEE OTHER PEOPLE

    • @r3d_stain
      @r3d_stain Před 3 lety

      Name?

  • @sundhukumar
    @sundhukumar Před 3 lety

    kudos to this team.......that was an awesome explanation with nice CG,showing all version of seat belt mechanism...

  • @rahulchintapalli7306
    @rahulchintapalli7306 Před 3 lety +1

    Never thought of the science behind seat belt. Thank you

  • @standlyua3608
    @standlyua3608 Před 3 lety +5

    My dad always told me that our 2008 Laguna III have an emergency pistons in the seatbelt. Now I just seen how it works. So smart mechanism!

  • @arunkumarts8279
    @arunkumarts8279 Před 3 lety +32

    Please make a video on "How *Hill climb assist* works in car?" Or "How *cruise control feature* works in the car?"

    • @chrisrowland2255
      @chrisrowland2255 Před 3 lety +1

      Also traction control, please

    • @Jaymac720
      @Jaymac720 Před 3 lety +2

      Cruise control is just a computer module that keeps your speed the same. Pretty much all modern cars use electronic throttle bodies so they can control them to keep the same speed. It’s really not that remarkable. Adaptive cruise just uses a radar sensor to keep you at a certain distance from the car in front

  • @juerbert1
    @juerbert1 Před 3 lety

    Thanks for the eye-opening display !

  • @sunny27jan
    @sunny27jan Před 2 lety +1

    Never thought that, so much engineering is behind the car seat belts. Thank you for the detailed video.

  • @LoliLoveJuice
    @LoliLoveJuice Před 3 lety +41

    "what you see in this accident, looks really painful in slowmotion."
    me: na dude u dead.

    • @oerlikon20mm29
      @oerlikon20mm29 Před 3 lety +1

      the test dummy begging for mercy not to be put through it in slow motion

  • @stevemasaki5295
    @stevemasaki5295 Před 3 lety +6

    Who are these two that disliked this video? they probably have one of their loved one who did not use it? I dont understand how anyone would dislike this video! damn!

  • @devendrakumar87
    @devendrakumar87 Před 8 měsíci

    Hats off to you. Nicely demonstrated

  • @jymbyrlyyarmulkeshekelberg1490

    This was so clear and detailed, thank you

  • @nightpz
    @nightpz Před 3 lety +7

    Very good explanation, thank you! Only thing I disagree is the pre-tentioners don't explode when braking hard but only when they detect actual crash. If it wasn't like that they would be activated all the time by car journalists testing the brakes :)

  • @JacobHutzler
    @JacobHutzler Před 3 lety +24

    So the pre tensioner only can work once? After the explosives that triggered the mechanism are used up and have to be manually reset?

    • @bradnoyes7955
      @bradnoyes7955 Před 3 lety +22

      Correct, The pretensioners must be replaced or rebuilt after an accident. The video is mistaken about when they fire though, you cannot simply trigger the pretensioners by slamming on the brakes, they are fired when an impact is detected and/or the SRS module determines they are necessary.

    • @soldieroflife6487
      @soldieroflife6487 Před 3 lety +4

      Wouldnt IT be better if The pre tensioner worked on air, like when you brake hard suddenly instead of explosive?

    • @abhirajsutar8260
      @abhirajsutar8260 Před 3 lety +1

      @@soldieroflife6487 A separate pneumatic assembly would be required also pneumatic has kinda sluggish response so pneumatic would defeat the purpose.

    • @JacobHutzler
      @JacobHutzler Před 3 lety +1

      H I T M A N CoC my guess is the explosives can create a lot more pressure much faster and more reliably than a compressed air feed. The car would need more equipment (air compressor and storage). I guess they did the math and figured it would be cheaper to replace explosives as needed than to include every car with a compressed air system.

    • @bradnoyes7955
      @bradnoyes7955 Před 3 lety +1

      @@JacobHutzler Let's face it, once a car is more than a few years old, if it gets in a wreck that deploys airbags/pretensioners, there's no need to replace them because the vehicle is likely a total loss at that point.

  • @swagger9966
    @swagger9966 Před 3 lety

    thanks!谢谢作者!小小的安全带大大的人类智慧!

  • @MaazGhazanfer
    @MaazGhazanfer Před 2 lety +1

    how did we even think about this! it's mind boggling!!

  • @nonexist7386
    @nonexist7386 Před 3 lety +4

    1:36 “Wont Cause Passenger Discomfort”
    Me: You know what will? THE FACT THE CAR HAS NO DOOR

  • @HariomYadav-vd4ep
    @HariomYadav-vd4ep Před 3 lety +34

    Please upload on 5g network technology

    • @rishabhverma8821
      @rishabhverma8821 Před 3 lety +2

      Yes we wants to know how does it works 🔥🔥🔥🙏🙏5️⃣🗼

    • @PlayboyHZ
      @PlayboyHZ Před 3 lety +1

      Yes, and why it causes the corona virus, pleeeeeease

    • @logan2906
      @logan2906 Před 3 lety

      @@PlayboyHZ wait what?🤣

    • @fhm4
      @fhm4 Před 3 lety

      @@PlayboyHZ the cure for corona is easy.
      place cell phone in microwave.
      now you have a 5g corona cure.

    • @danielaburquez
      @danielaburquez Před 3 lety +1

      czcams.com/video/g-gGeAe-PJA/video.html

  • @ravikumar55555
    @ravikumar55555 Před 3 lety

    Complex problem...Ingenuine solution...awesome

  • @RonCAAK
    @RonCAAK Před rokem

    Good explanation of how a seatbelt functions.

  • @TelmoMonteiro
    @TelmoMonteiro Před 3 lety +14

    The animation around 1 minute is inverted :s The spring and axle don't act correspondingly

  • @zerin.
    @zerin. Před 3 lety +4

    can some one explain me 7:12
    i understood the explosion part
    but what if a hard breaking saved the collision
    then shoul we replace the explosion piston each time after a emergency breaking

    • @rafee9442
      @rafee9442 Před 3 lety +4

      Pretty sure the pretensioner doesn't trigger with hard braking, it triggers on collision

  • @gaddamkartheek9833
    @gaddamkartheek9833 Před 3 lety

    Wonderful explanation. You did a great work behind this video. Thank you so much for excellent and very important information....

  • @designsolution2417
    @designsolution2417 Před 3 lety

    So beautiful learning video. Thank you very much for sharing.

  • @dawsond.7007
    @dawsond.7007 Před 3 lety +8

    The guys talking about how safe it is to have a seat belt and how they work but I don’t think it’s safe to not have a car door...

  • @abdulrahmanalqeisi3304
    @abdulrahmanalqeisi3304 Před 3 lety +3

    I like how accurate the make of the animation where the women keeps making accident with a static rock 😂😂😂

  • @user-xd8td8jy6i
    @user-xd8td8jy6i Před 2 měsíci

    شرح في منتهى الروعه والضوح

  • @kanushbhalla83
    @kanushbhalla83 Před 3 lety

    Beautifully explained

  • @Khulu6061
    @Khulu6061 Před 3 lety +2

    One thing I learned from this video is you have to maintain your vehicle even if your car looks fine after the accident.

  • @anujminhas1098
    @anujminhas1098 Před 3 lety +59

    5:17 such high heels are not recommended while driving a car.!!!

  • @jeots962
    @jeots962 Před 3 lety +1

    WOW that’s evolution of the seatbelt. Too fracking cool. I’m sure glad they’ll help you survive crash. Now, can I get one of those for my power chair? Air bags don’t seem to work on them...

  • @yusun5722
    @yusun5722 Před 3 lety

    Such an engaging way to explain the technology. Thanks.

  • @manualLaborer
    @manualLaborer Před 3 lety +4

    0:08 - pow right in that pretty face

  • @kidzbop38isstraightfire92

    I'm doubting that my 2003 Corolla has half of these safety advancements lol. It's probably just a belt taped directly to the frame.

  • @mehdichafi9219
    @mehdichafi9219 Před 3 lety

    Behind each simple mechanism a genius ideas of engineering ✌🏼

  • @lourensiusmungenga9180

    Now I understand, wow love this channel❤

  • @Gooberslot
    @Gooberslot Před 3 lety +13

    If you can't avoid the giant boulder in the road then you shouldn't be driving.

  • @user-dk8vy4on4h
    @user-dk8vy4on4h Před 3 lety +6

    Thnx volvo for the seat belt
    +Why the f this woman used her left leg

  • @TheHimalayanDiary
    @TheHimalayanDiary Před 3 lety

    Hats off to the science and engineering ..who developed such a piece of engineering who saves life, besides providing comfortable ride also.....

  • @jacobarakkal2364
    @jacobarakkal2364 Před 3 lety

    Thank you very much for all your kind information, beautiful explanation 👍

  • @a_day_as
    @a_day_as Před 3 lety +7

    Just few months before survived an deadly accident...all thanks to seat belt and airbag

  • @teslinatorteeeeay7203
    @teslinatorteeeeay7203 Před 3 lety +12

    Last time I was so early seatbelt wasn't even a thing.

  • @karan8362
    @karan8362 Před 3 lety +1

    Well explained and fully described new and old designs thanks for great information 👍👍

  • @stephencannon3140
    @stephencannon3140 Před 3 lety

    That was interesting. Facts not fluff. Had never thought of the brake pedal being tied to the seatbelt. See you can learn something sitting in a car wash/spa on a summer Thursday afternoon.!!!!

  • @junoguten
    @junoguten Před 3 lety +3

    So wait, if I ever press the brake really fast, I've already used up that explosive thingy?

    • @tommasogalimberti9886
      @tommasogalimberti9886 Před 3 lety

      Follow

    • @gameonyolo1
      @gameonyolo1 Před 3 lety +2

      No that part isn't true

    • @ravikumartantry
      @ravikumartantry Před 3 lety +2

      i am from seat belt manufacturing company so let me tell you , pressing slow or fast the brake the explosion will not take place at any cost . Pressure / Force sensors will be place at the front end of the car only if the car get that enough pressure sensors will activate and pass the signal to MGG ( micro gas generator ) to ignite . I hope its clear now

    • @junoguten
      @junoguten Před 3 lety

      @@ravikumartantry Yeah that makes more sense. Thanks.

  • @pranaydwivedi910
    @pranaydwivedi910 Před 3 lety +239

    Feminist like: hell this channel is showing women as driver in accident ! ....

    • @Priyam6F4
      @Priyam6F4 Před 3 lety +9

      😂😂😂😂😂

    • @ezmat2010
      @ezmat2010 Před 3 lety +6

      HHAHAHAHAHAHAHA is was thinking exactly the same while watching the video

    • @anonyomous570
      @anonyomous570 Před 3 lety +2

      🤣🤣

    • @sanghyukseo1498
      @sanghyukseo1498 Před 3 lety +1

      👍🏻👍🏻👍🏻🤣🤣

    • @jaimey001
      @jaimey001 Před 3 lety +13

      (Shows male driver) What the hell?? Only men can drive?? Hey hey ho ho sexist engineering videos have got to go!

  • @veganchaatparty
    @veganchaatparty Před 11 měsíci

    Wowwwwww......super awesome....and what a amazing explanation...super thanks for sharing!

  • @zaenoaplays1855
    @zaenoaplays1855 Před 3 lety +1

    Wow, Very Nice Explanation!

  • @Mathiyalagan.Official
    @Mathiyalagan.Official Před 3 lety +10

    Here's a bonus 😉 ,
    This entire process done within milliseconds.

  • @kartikdeshmukh1585
    @kartikdeshmukh1585 Před 3 lety +7

    Poor lady how many times she has to involve in an accident and take damage to show us how seat belt work 😂😂😂

  • @listtamaru
    @listtamaru Před 3 lety

    Much more awesome than I first thought

  • @benjaminrobledo5466
    @benjaminrobledo5466 Před 3 lety +5

    I can't be the only one who fears that the belt will snap or tear, right?

    • @wet0wl
      @wet0wl Před 3 lety +1

      I never feared that just because of how strong seatbelts are, those things are actually insane

    • @benjaminrobledo5466
      @benjaminrobledo5466 Před 3 lety

      @@wet0wl
      Well, yes... But I was also referring to where they are attached.
      The entire mechanism could come loose from the bolt that ties it to the seat or car...

    • @tabushka292
      @tabushka292 Před 2 lety

      I saw a video where they talked about an accident on a highway, happened at around 130 kph (80 mph) and they said there was so much energy released at the impact that the seatbelt just ripped.

    • @benjaminrobledo5466
      @benjaminrobledo5466 Před 2 lety

      @@tabushka292
      That's... Another concern I now have... 😂

    • @tabushka292
      @tabushka292 Před 2 lety +1

      @@benjaminrobledo5466 Well there's only so much seatbelts, airbags and crumple zones can protect you from. But if you pay attention you will brake and try to evade the obstruction so you hit it an angle. If you just run head on into something at full speed you will probably die even with all the safety features in place. So I don't think it's much cause for concern, seatbelts do their job fine but they also require the drivers to pay attention and follow the rules.

  • @genelomas332
    @genelomas332 Před 3 lety +4

    Explosive pretensioner..?
    Does that mean it is a single use item, and needs to be replaced, even if the car is not damaged..?

    • @ethancupp530
      @ethancupp530 Před 3 lety

      Yep. If the airbags go off you need to replace the bags as well as the whole retractor assembly. But they won't just go off by stomping on the brakes you need to be in a collision.

  • @lrboyenger
    @lrboyenger Před 3 lety

    Kudos to the Engineers and Designers !!!

  • @user-dz3un1tj8j
    @user-dz3un1tj8j Před 7 měsíci

    This is fabulous Sir thanks and continue teaching us

  • @sean71300
    @sean71300 Před 3 lety +4

    6:57 since she didn't step on the clutch, wouldn't this vigorous breaking stall her rare manual bmw real quick?

  • @tinkersailorhead4360
    @tinkersailorhead4360 Před 3 lety +4

    These shoes shouldn’t be recommended while driving 😉

  • @christianpetersen163
    @christianpetersen163 Před 3 lety

    I for one have complete confidence in all these little bits of plastic and metal that are loosely fitted together.

  • @sadikkhan-pd1dq
    @sadikkhan-pd1dq Před 3 lety

    very well explained technology behind seatbelt & its operation

  • @AbidAli-gs1wr
    @AbidAli-gs1wr Před 3 lety +3

    Nobody is talking about the fact that there is no drivers door.