Why Don't Semi-Trucks Use Hydraulic Brakes?
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- Опубліковано 23 лип 2024
- Why Don't Semi-Trucks Use Hydraulic Brakes?
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Join us as we delve deep into brake systems, exploring the advantages of air brakes. We compare hydraulic and air brakes, uncovering their pros, cons, and operational mechanisms. Learn about reliability, fail-safe features, and why heavy vehicles favor air brakes while most car manufacturers stick to hydraulic systems.
The content of our videos is for entertainment and the information contained is for you to
know what is happening on the screen and has some educational value.
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Email: yeeicontacto@gmail.com
Timeline
00:00 Intro
00:08 Safe transportation
01:10 Operation
02:42 Advantages
03:50 Disadvantages
04:54 Conclusión
05:56 Outro - Наука та технологія
Dude, I think you've got it reversed.
The air is normally used to disengage the brakes not engage them.
The brakes are held on with springs, this providea the advantage that in the case of system failure, the brakes will automatically engage.
There's an emergency lockout system where you wind the brakes back open in case you need to tow start a truck that's not starting.
Exactly. Without air pressure the brakes are closed completely. Not the pressure of the air brakes but the force of the springs.
that,s the Park brake not the service brake system.
Reason 1: hydraulic brakes can overheat (fading)
Reason 2: connecting of trailers is much easier with air lines
Reason 3: more safety. Without pressure an air brake is locked.
This was actually quite interesting!
Fascinating stuff.
I see this chanel growing big transitioning from a truck show to an informative truck chanel😊
as a truck driver i prefer the feeling of the air brakes as the sensation with hydraulic ones (but i nearly never use them because i use retarder which is sufficient most of the time)
You need to study physics a bit more. All vehicles stop by converting their motion (kinetic energy) into heat with the use of friction. So a larger vehicle will produce more heat because it has more kinetic energy.
True - this has nothing to do with the comparison of air and hydraulic brakes.
IF THE PARTS WERE AVAILABLE I WOULD CONVERT MY CAR AND PICKUPS TO AIR BRAKES!!
👍👍👍👍
When you have an air leak you get a warning in the cab that you don't get with hydraulic brakes.
Volvo ❤
Hydraulic brakes are the best
That aint the way i hear'd it, sonny.
The air pressure keeps the brakeshoes OFF of the drums. You touch the brake pedal, the air is released, and the springs the air pressure is compressing, push the shoes against the drums. You run out of air, and the brakes are automatically engaged.
The problem with hydraulic brakes, is the disconnects between the truck and trailer; you dont just hook or unhook a fluid line to another fluid line without leakage or risk of contamination. Air is, like, free, and a system proven to self-clean under proper operating conditions.
So much wasted money for this badly flawed presentation.
100% Correct. This is why a cold truck sits revving the engine to build up air pressure in order to release the brakes. It is a fail safe system which applies the brakes if all air pressure is lost.
You have it Wrong too . The Brake Actuators have TWO Diaphragms each . One " Can " releases the Spring Brakes by compressing the springs , and the Second " Can " pushes the Brakes back on . Yes the Park Springs do assist , but what You said would not provide enough precision of control for an On-Road braking system . Yes , a sufficient loss of Air Pressure will have the Brakes start Locking on . The ONLY sensible default .
And further , an Air System is relatively self cleaning ONLY in the case of there being an Air-Dryer fitted . Otherwise Daily , or even more often , draining of Condensate is ESSENTIAL or Brake Failure WILL result . A technique for clearing the system out , Once a Month , is to put One Cup (250 ml ) of Methylated Spirits into the Receiver Tank (Wet Tank) , the First one after the Compressor and Drier (if fitted) , and then just Use The Truck/Bus Normally . The Alcohol will evaporate and run through the system and Completely Remove any residual moisture .
The video doesn't explain the parking and emergency function in detail, so it isn't wrong about it. Your attempt at explanation is very wrong, though.
Pushing the pedal doesn't release air from anything - pressure remains up in the parking and emergency circuit (red hose), which continues to counteract the springs. Pushing the pedal supplies air pressure to the service brake circuit (blue hose), applying the brakes.
Pressure is only released in the parking and emergency circuit if the dash button is pushed, or in the trailer if the red hose is disconnected, or in either truck or trailer if a leak is so large that the compressor can't keep up.
No, @@PeterJ-ij6mm, jerrynorton1080's explanation is incorrect.
I said, that aint the way i hear'd it. Obviously, too many dont know, or bother to fully explain things, so i jes now sorta wandered thru the available videos and there is definitely some things left out of some cdl schools. Considering the candidates, it is so dumbed-down those of us who can understand the full thing, arent given more than the slowest in the class can handle, and i never had a trucker tell me my information was faulty; they have said, or agreed with, "you lose air and your brakes will engage". THAT part aint wrong. I think about it, tho, and yeah, the pressure to apply the brakes is The Way that That part works, and nobody told me ive been wrong, since i do a decent job of herding a big bucket-o'- bolts and my ignernts aint showed up. Ya kin learn sompin new every other day-or-so, eh?
You call air brakes expensive?. I'm guessing you've never worked on a heavy truck or piece of heavy equipment with juice brakes.. And BTW to stop the same vehicle with all conditions equal air and juice brakes generate exactly the same amount of heat
Because brake fluid heats up quickly and you loose brakes