Understanding the Technology Behind the Train Brake System

[@nate4745]

Compressed air in the brake pipe goes through a triple valve which fills an onboard reservoir on every car; at the same time venting the brake diaphragm and releasing the brakes. When the brake pipe pressure is lowered, the triple valve removes a proportionate amount of air from the onboard reservoir and sends it to the brake diaphragm. When the brake pipe pressure is increased, the triple valve vents the diaphragm by proportionate amount and adds it to the reservoir. When all the air is removed from the brake pipe, all of the reservoir air is applied to the brake diaphragm. This way, if the brake pipe pressure is suddenly lost, all brakes go on. There are refinements to this system, including electronic components but this is the basic operating system. When some knuckle-head drives in front of a train, the engineer may throw the emergency brakes "on" which dumps all air and stops the train, usually hundreds or even thousands of feet further down. It may take the engineer 10 minutes or more to recharge the air line before he can move on.

[@MottyGlix]

@nate4745 That sounds like the American system, and heretofore I had thought that that was a universal system. This video makes me think that we are here being shown a European system that is different.

[@waqtube]

"When some Knucle head drives in front of train...." Love that line 😅😅😅😅😅😅😅

[@Triplex5014]

@@MottyGlix Hello! Indeed there is a difference with US braking system and the European braking system. Since the Westinghouse company developed the automatic brake system for trains (it's called automatic because in the case train break apart, emergency brake is applied) it has been widely adopted in the United States. It's using a triple valve that can gradually increase braking power but you can't gradually release the brakes, release is done all at once. Now, going to Europe, Serbia in the 1920's a man named Dobrivoje Božić developed and patented in 1928 an improved version of the automatic braking system which doubled the air flow in the main pipe and had the gradual release function which meant air was being used more efficiently thus making the train reach higher speeds and having better braking performance. Still to this day a 100 year old design of the independent brake lever called "Božić-L" is used on some locomotives and multiple units in countries of ex. Yugoslavia. It's very simple and robust. Greetings from Croatia, a train engineer!

[@janpf0624]

The video is not from Europe. Our valves are red (main) and yellow (supply). We use alike system like Westinghouse, but implemented into national levels by Knorr, Božič or Daněk (DAKO CZ).... etc. But the main valve is 3-way proportional, filling the reservoirs, releasing the brakes and deploying the brakes. Also the braking effort can be set (freight, passenger or fast - braking performance determination).

[@IndSovU]

Nice. These aspects were not made clear in the videp. Thanks.

[@srinivasank613]

It was useful 👌

[@acreguy3156]

This is a computer generated narration of a poorly written essay. The graphics are stellar. Too bad the essay was written at such an advanced level. Hint: Whoever wrote the content, think "audience." Are you talking to 3rd year mechanical engineers or the general public who are interested in knowing how train braking systems work?

[@jsbedi]

I see some video show something a little different. *Some system increase pressure to brake (as I understand that I see in this video) *Some system release pressure to brake (that more secure in case that pressure leak so the first system cannot have pressure in the level to stop the train)

[@NunyaLastnameington]

First. Reply on this comment

[@davegeorge7094]

NO loss a air pressure causes springs to engage brakes. This is the most safe type of system.

[@MegaGeorge1948]

Just like air brakes on semi-trucks. If the truck loses system air pressure due to a leak, the brakes will eventually apply. So the trucker needs to pull over quickly.

[@Trainman10715]

No it doesn't, that's on trucks, not on trains. You couldn't get the required brake force with springs on a train. On trains, the pressure to lock the brakes should a loss of continuity occur comes from the local air reservoir on each vehicle which is charged by the main reservoir pipe through a one way valve. As long as the local air reservoir is charged then you will have brake force, and it takes hours to discharge if the main res pipe is disconnect

[@MegaGeorge1948]

@@Trainman10715 So no air, no brakes then?

[@Trainman10715]

@@MegaGeorge1948 no air in the local reservoir* no brakes, correct. Hence why all rolling stock must have the handbrake engaged when stabled as the local reservoir will depleat over time. This brake system is still fail safe though as whenever the train is moving the local reservoirs are kept charged by the main reservoir which itself is charged by the compressor. And a compressor failure will result in a loss of the brake pipe pressure long before the local air reservoirs exhaust significantly

[@MegaGeorge1948]

@@Trainman10715 Thanks for the info.

[@pradneysarmalkar5385]

Very Useful Information Technology Video.

[@antonylawrence7266]

So the air pressure keeps the brakes open ? Releasing the air pressure activates the brakes ?

[@LocalYoutubeGuide]

Yes

[@podgee7507]

as far, as i know. in Australia, we use triple valve system on diesel electric and steam engine and some electric train

[@pieterschadron3644]

You never bothered to explain the main safety principle of a train braking system, if there is a failure in the the braking system itself the pressure drops which activates the brakes. Without pressure the train can't move or if it is already moving it will be stopped. But you did mention the names of all the parts of the system, in my view this is a poor way of learning, not talking about the principles of the system but learning the names of the parts. Thanks for the animation.

[@nickjudd5188]

Some of these comments lol!!! I knew it was going to be savage, but some of the self-proclaimed experts commenting must be the crazy nutter types who chase trains in their vehicles with binoculars, tripods and zoom lenses.. 🤣 (no offence intended to crazy nutter types who actually know what they're talking about.) 😅 To the creator - "Let's Grow Up"; 10/10 for your digital creation and presentation skills; 5/10 for accuracy; 1/10 for what I can only describe as a truly weird and/or condescending channel name.

[@MohammadImran-tc5fy]

Verey nice video sir 👌🏼👍🏼

[@avadigamers9306]

this is the only video which i find it hard to understand.... can u please explain with more details in which, how the compressed air actually controlled and it stops accordingly... need to know how much speed it can slow down in time for disc vs normal one

[@chris_fly]

Simplistic explanation. In an air brake system, which is what is shown here, the brake pipe is always pressurised. Imagine two systems - (i) the brake pipe system and (ii) the coach's brake reservoir system. In normal condition when a train is moving, both of these systems have equal pressure. When the engineer activates the brakes, the brake pipe system loses pressure. The braking system is designed in such a way, that when pressure of (i) is lower than pressure of (ii), the brakes get activated based on the difference in pressure (more difference in pressure, higher braking), until the train stops. After the train stops, the locomotive engineer has to apply only parking brake - at this time, the compressor in the locomotive starts to pressurise (i) again. When pressure in (i) is higher than (ii), it recharges the pressure in (ii). In this condition, the brake is released, but the train doesn't move as the locomotive is set on parking brake. It can take 5-10min to fully recharge the system, depending on length of train, type of train etc. Its quite complex to explain in words, but I think there are other videos out there that explains this pictographically. You're right, this video doesn't explain anything.

[@avadigamers9306]

@@chris_fly Wow bro, you explained very well in words... Thanks for your patience and explaining me... This Helped me in understanding the whole process easily

[@xxskippernate409xx6]

That is interesting. Thank you for making this.

[@sonnyzehm105]

Just so you know those are not brake shoes those are brake pads and they work very similar to the brake pads in a car. The brake shoes weren't very similar to the brake shoes in a car as well but they do pressing up against the wheels in a car they were pressed up against the drums if you have drum brakes

[@phugoid]

And how typically often are the train's pads replaced - once a year? I know it depends on the amount of usage and all that...

[@sumitkumarmittal1701]

Really...it's very very dynamic video

[@SushantTari-vq8mc]

Very good video

[@gazloading]

Clear as mud

[@domi9322]

They forget to show the „Hilfsluftbehälter“ There is pressure that fills the brake cylinder to brake

[@Train_Bus_Plane]

Great

[@shankarjayavel717]

Pls tell about the cabinet control panel of electronic locomotive and deisel locomotive

[@ThetPe-it5fe]

ဘရိတ်လေပေါင်ရဘို့စက်တပ်ခေါင်းတွဲရဲ့အားသုံးတာထက်ပိုကောင်းမယ့်နည်းလမ်းလို့ထင်ပါတယ်😅လည်ပတ်နေတဲ့ဘီးကိုလေပေါင်ဖြည့်ကွန်ပရက်ဆာအတွက် လည်ပတ်အားသုံးပြီး လေပေါင်အားမင့်လာအောင်😮😮လည်ပတ်နေတာရပ်သွားအောင်😮😮အသုံးချရင် စွမ်းအင်သံုးစွဲသက်သာလာနိုင်တယ်😮ဘရိတ်ရှူးတွေလည်း သံထည် အားလုံးထက် ရော်ဘာ 😊ကြက်ပေါင်စေး😊ပြားအနည်းငယ်ထည့်ပြီးတွဲသုံးရင် ဘရိတ်ဖမ်းကပ်အားပိုကောင်းလာနိုင်တယ် 😊😊😅

[@joshuahalla.k.a.controlla6333]

Wow.

[@rael5469]

What I wonder is how those piggy-back cars can be in the middle of a train. You'd think they would be so light weight that the heavier cars would just jack knife them right off the tracks and cause a derailment.

[@DeepakSaini-dk9mo]

Plz make a video on elecrro dynamic brake system used in metro trains

[@12345678991573]

Yes please

[@Trainz_Aviation_Content]

Can you explain about railway vacuum brakes please in next video

[@hemantsable3791]

Let's grow up ✌️ never stop ✋️ learning ✌️ ✋️ 🥳 👍 ✨️ 🎉❤

[@marccracchiolo4935]

Good job on video but not great. This explanation is a bit complicated if you’re a novice. Need to simplify it a lot and maybe break it down into more videos will simplified steps.

[@12345678991573]

How brakes are released

[@kodiappalaraju]

When sufficient pressure is restored by brake pipe, they release

[@12345678991573]

Sir any animation course is there for rail vehicle technology?

[@gerrymcardle9319]

I am afraid you don’t understand how the system works, Therefore you cannot explain the workings of the system. Don’t give up your day job.

[@ranjithnandhana8184]

❤

[@NunyaLastnameington]

They don't use disk brakes no more

[@davep6977]

what's with 2 hoses? It's a train, not a semi

[@matthewwolff3729]

Wonder where this system is used? It's not used on American freight trains.

[@waqtube]

Hi Some viewers didn't find it helpful... I DID it's articulated helpfully The balloon example explains the basic principle Putting it in my words - its pretty similar to bicycle brakes but instead of applying brakes with hand power the compressed air is released into cylinder pushing the piston that moves the lever with brakes which grab the disc attached to wheel just like rubber brakes cling to bicycle wheels.. Phew! 🙉

[@Cartcheung]

our transfer cart use train wheels to handling heavy duty

[@jamesstuart3346]

Sorry not helpful 😮

[@carltonkeys6205]

So

[@Maniacguy2777]

Why?

[@AnilKumar-ey5yb]

Because his train derailed 😂😂

[@teskiii]

Give them a brake.

[@ayushjha2345]

Trains stop faster when it derails. Nice one

[@hirakmallick8139]

DV ke barame ak video banaiya sir

[@heroastra8928]

I’m gonna give you dutch directness here; this video is very hard to follow. I’d enjoy a remade version, with a bit more detail on the subsystems mentioned cause right now, i still have absolutely no idea how the fuck the system works

[@lakshmanpandit4473]

Andhra Pradesh Train 🚂 Hadse ke bare me bataye 3D animation me

[@socialokay]

Sorry. Not that helpful. Despite your efforts in creating animated presentations, it would have been more interesting even with a picture presentation if not an animated one but with more stuff in the knowledge share. You have given your best in animation only. But, subject matter that one can take away is quite low after this 5 minute session. People who find and reach you for this info will surely have more expectations for such indepth knowledge. Thanks

[@edwardjones8362]

Very poor commentary, emphases and timing of the voiceover is appealing. So bad that it’s very difficult to comprehend the events talked about.

[@NAVEENSHARMA-wx6ly]

Hindi language me video dale

[@mdabulkalamazad1563]

আপু তুমি কোথায় থাকো প্লিস বলে যাবে

[@sahar9haghighat]

Hello sir

[@IndSovU]

Your anti-American students might understand kilos per square cm but you might condescend to mention the pounds per square inch for people who work every day with psi. There are hundreds of millions of us, even if you despise us. You might also bother to take a few seconds to explain wtf the toilet water tank has to do with the brakes, because that seemed more than slightly off topic. You probably have an 8 minute video you are trying to accomplish in much less time. It seems incomplete.

[@transportromania]

I'm sure that a Google search can help you convert the measuring units. I can only speculate that the toilet reservoir is used for the vacuum toilets and other systems like pneumatic doors. At least in Europe that's why we use a higher pressure air pipe in passenger trains (it is also used for unloading some freight waggons), only that for us is of 10 bar, not 6. Of course, if we talk about brakes, we can leave the high pressure pipe not connected to the waggons, the important thing is to have the 5 bar pipe. The locomotive must also be equipped with a main air tank, that has a higher pressure (I am gonna speculate that for India it's 6 bar; in Europe we use 10) and it's used to quickly increase pressure in the main pipe in order to moderate the brake (and weaken it or totally unbrake) quick.

[@verma0123]

Hi

[@railwaymechanicalengineer4587]

AMATEUR IDEAS ABOUT TRAIN BRAKE SYSTEMS !!!!! This programme is an idiotic load of nonsense, riddled with fundamental misunderstanding of such technology. .

[@nickjudd5188]

What surprised me even more are some of these comments!!! I knew it was going to be savage, but some of these self-proclaimed experts must be the crazy nutter types who chase trains in their vehicles with binoculars, tripods and zoom lenses.. 🤣 (no offence intended to crazy nutter types who actually know what they're talking about.) As to the creator - "Let's Grow Up"; 10/10 for your digital creation and presentation skills; 5/10 for accuracy; 1/10 for what I can only describe as a truly weird and/or condescending channel name.

[@transportromania]

It's a very, very short description of the brake system... of course some elements are not presented, like the main reservoir in the loco and the way that the driver's valve works, but the principle (extract air from the pipe, distributor sens it, it connects the auxiliary reservoir to the brake cylinder, brake is applied) is correct.

[@travismcvey]

Tell me you little you know about train brakes by trying to tell how they work.. 😂😂😂

[@railwaymechanicalengineer4587]

@@nickjudd5188 There are many different types of train braking systems used around the World. Many of which are Totally UNKNOWN in the USA. For a start is it a Vacuum system, an Air brake system, a Hydro Kinetic system. How is it actuated, by loss of pressure, or loss of vacuum or by electricity. Is it a single pipe system, or twin pipe system. Are there reservoirs. Does it use Brake Blocks, or Disc Brakes, the list goes on ! What is shown in the programme is extremely limited, and normally found only on certain types of passenger train in one or two countries.

[@i.m.385]

Im a train driver, this video is horrible. You didn’t explain brake systems. You showed the layout of a particular train types brake system. Nowhere did you explain the use of triple valves or similar such systems. You can’t call this explaining brake systems where you only told us you have air pressure, air pressure goes to a panel, disc brakes go brakey brake, and done.. this is not useful in any aspect

[@chaicoffee200]

poor choice of channel name. let's grow up??? really

[@MrSlim1959]

Okay that will work just fine for 10 to 20 coaches but what about 100 to a 150 fully loaded coal cars.Not going to work.Dynamic braking should be your next video.

[@rail__fan]

LHB Coaching trains have Disc Brakes, frieght wagons have Air Brakes.

[@transportromania]

Air distributors can be set to a higher delay in action... generally, a regular European freight train (up to about 50 wagons / 200 axles) has a 15 - 20 sec action time of the brake, to avoid creating shocks in the train, while a passenger train of less than 80 axles has 3 - 5 sec. Brake force can also be set between predefined settings (G (freight), P (passengers), R (fast) or R+Mg (fast+electromagnetic, for passenger cars equipped with electromagnetic brakes). For an 100 cars train... you'd need very slow action air brake and all the dynamic braking the loco can give you. Or you can install electropneumatic brakes, that can command electronically all the brake distributors at same time... the later can be quite expensive and I doubt it is used at the monster trains in US, Australia or India, but will probably become a standard feature in Europe in 20 years, with the introduction of the Digital Automatic Coupler (DAC).

[@MZmuda5]

I'm starting to dislike these AI-voiced videos. They're so unnatural. Uncanny valley.

[@stanisawk1385]

no no no clearely

[@Roshan_K]

Worst explanation.... Iin most train brake system the brakes are applied all the time and air pressure is applied to lift or remove the brakes as the train to go.... this ensures if anything goes wrong the brakes should always be applied (default) to avoid accidents and roll overs

[@alb1505]

What’s the ridiculous music for?