Why Use a Jake Brake? Engine Brake Explained
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- เผยแพร่เมื่อ 26 ม.ค. 2024
- Why Use a Jake Brake? Engine Brake Explained
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🚛 Ever wondered why trucks have engine brakes?
In today's video, we unravel the fascinating world of engine brakes and their crucial role in heavy-duty vehicles.
Stick around to discover how engine brakes work, their advantages and disadvantages, and when and how to use them effectively.
🔧 Chapters:
00:00 Introduction
00:28 How Engine Brakes Work
01:16 Advantages of Engine Brakes
01:55 Disadvantages of Engine Brakes
02:23 When to Use Engine Brakes
03:11 How to Use Engine Brakes
03:39 The Braking System of a Truck
04:46 Summary
Join us on this journey through the intricate engineering behind engine brakes and the reasons why trucks rely on air brakes.
Hit the like button, share with fellow truck enthusiasts, and subscribe for more in-depth explorations into the mechanics of heavy vehicles.
Until next time, stay safe on the roads and keep on truckin'! 🛣️🔧
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A Jake brake in simple terms turns a power producing engine into a power absorbing air compressor . Good Video !
Thanks 👍
The first time I saw the term "jake brake" was when I was passing through the residential area of a Boston suburb - located between the interstate and a commercial area. The sign said, "No Jake Braking". When I looked it up, I realized I'd been hearing semis engine braking all along - used it myself on my car when I drove a manual shift - but I didn't know the term. :D
In Europe, most of the trucks, especially the new ones, have very efficient and quiet retarders, I have never seen any of those signs before
in a pneumatic braking system, the air pressure releases the brakes, when you lose pressure, the brakes lock for safety.
It's just the parking breake that works that way. Air pressure actuates the service breakes when you step on the breake pedal.
Sir, You talked about what these systems are called, and they exist but you did not get into either the engine brake systems, i.e. valve timing in relation to piston cycle positions OR the fundamental differences of hydraulic and air brakes. For instance, air brakes are easily disconnected and reconnected among other things.
The info was as accurate as the animations. 😂
Seriously. This guy has no idea how stuff works and probably thinks he can get away of showing some non related stuff and pass it up as visual animation! 😂
Doesn’t TH-cam ban misinformation?
Never ever use an engine or exhaust brake on slick or icy roads. You will have one wheel doing up to 90% of the braking you're asking for trouble. Distributing the braking over 10 wheels helps the truck slow safely.
That’s a bunch of bullshit. I do and never had a problem. Stop living in the 80s when you guys had shitty old trucks.
@greatwhiteshark4931 I've been fortunate enough to see firsthand on a skid pad what can happen. And I wasn't dumb enough to listen to people who would be careless about safety. As a professional, you should be trying to minimize problems. Just like a driver at my company. Drove the same trip for years. Always stopped on the same ramp. Was told multiple times that it was dangerous. He had your attitude. One trip, a man died because he went under his truck. Now he is without a job.
I've been driving for almost 30 years. I've learned some things in that time.
Can you please make a research about each engine brake style of each brand? They are all different and would like this channel to break it down for us, Volvo for me has the best of all the engine brakes!
An old system ,Williams Blue Ox braking system is close to what Volvo has . Basically a valve that shuts off exhaust flow from the engine . I liked the Caterpillar Brake Saver from past years .
Never use engine brakes in icy conditions
Volvo has an automatic engine brake option that activates to assist the pedal brake, if u press the pedal lightly it will bring the engine brake lightly if u press it harder then it will kick in harder, I’ve used it in the snow and using both combined works well but if u using engine brake separated from the air brakes on icy conditions that’s when it gets scary!
@user-fl7pw3vl3t Interesting point. I was taught not to use engine brake at all in order not to loose traction with road, but I've never tried service brakes together with engine brake.
@@michaelmoskvichov8527 yesss that’s a feature that comes in the Volvo,
Volvo has 5 levels of engine brake:
-OFF; no engine brake
-Automatic; function where engine brake kicks when u hit the brakes, adaptive cruise control, etc.
-Level 1; 25% engine brake power
-Level 2; 50% engine brake power
-Level 3; 85% engine brake power
-B; downshifts you even 2 gears if u at 70MPH or lower and will bring 100% engine brake force.
like it allows u to control the engine brake in every way possible.
@user-fl7pw3vl3t Yes, of course I know about all the levels and the fact that you can set cruise control speed maximum after which engine brake kicks in, I just don't remember trying to use automatic settings with service brake on icy road, curious how the truck will behave...
@@michaelmoskvichov8527 I did it couple of weeks ago in Indiana I had total control! And yea that cruise control thing is clever
Your wrong about the noise. The nouse is the coolest part about them
How would engine brakes increase emission when they do not require any fuel?
This guy doesn’t know how the air brake work much less how the engine brakes work. He’s some I…t that thinks he can pass one over uniformed public.
He didn’t depict engine braking in his “video” and air brakes work just the opposite of how he described them. He probably just found some video clips, quick read on google and obviously misunderstand most of it.
Engine braking is blamed for under “environmental pollution/impact” as in NOISE not emission 😂 You know, scaring wild life and people, that sort of thing. 😁 That’s because it sounds like popping balloons just way louder (different than gun fire tho but almost as loud under some conditions and full force)
I wonder what the technology will be to emulate "Jake Braking" for the upcoming arrival of EV trucks?
About brakes, there are a lot of disk brakes on a new semi trucks. They are more effective. Don't use engine brake on sharp curves and black ice road. Make sure truck is straight it most effective and safe time to use a engine brakes.
In a car there is normally a throttle (carburetor, throttle body, or on some cars variable valve opening) that restricts the amount of air that enters the engine which creates a vacuum that the engine is working against and helps slow the vehicle. A diesel engine on the other hand does not have a throttle and has no means of slowing the engine internally which is where engine brakes originated from. The engine brake is way more effective than a throttle would be. Some engines also use the turbo to create higher exhaust pressures to help with slowing down the vehicle also before the standard engine brake kicks in.
I've always wondered what engine brakes were. As a normal driver, I would see signs at the start of small towns about not using engine brakes in town. I didn't understand why those signs were necessary. Thanks for the info.
Granted, I'm not American, and English is not my native language, but I am a professional driver from Europe, and what I understand, engine braking is actually just a driving technique, by shifting into a smaller gear and revving up the engine you're slowing down without the need to use traditional brakes, it's a great way to save on fuel and brakes, and part of anticipatory driving, even better is to look forward enough on the road so you can lift the gas pedal even further back and without the need to shift or anything, so you're not "engine braking" at all, and end up the saving even more gas. but like I said, that's just a driving technique, and you can do that with a moped, car or a truck. but what we have in trucks, at least in Europe, are exhaust brakes, which is an actual device that slows the engine, there's also some other devices, some sort of magnet device on the driving shaft or something, but I've never seen that in a truck because it's a option when you buy a new truck, and no company ever selects that.
Engine brakes is just another term for one of few different ways of implementing the same thing you just described under exhaust brakes.
The passengers car’s “engine brakes” do work as you describe as a “driving method” since gasoline engines have throttle body able to create vacuum ( unfortunately with modern drive by wire TBs that doesn’t always work as well as old school manual throttled cars and not at all with Auto transmissions used almost exclusively in USA now days) but that’s not what we in USA mean when we use the general term engine brakes.
First off, my credentials. Retired after more than 40 years as driver & mechanic.
In my completely biased opinion, those signs are the result of Billy-Bob Big-.Rig drivers who remove their mufflers & run those 6 inch straight pipes. They just like to make lots of noise. They have no consideration for the people who live close to the road.
Jake Brake is a trademark of the Jacob's Manufacturing Co.
Interesting. The concept that this is implemented much differently than in a manual passenger car.
Engine brakes apply braking only to the drive axles. If you use it on ice your trailer isn't being braked and it will push out of control.
When driving in slippery conditions, dont use the engine brake. Unless you want to be like El drifto.
They are called “service brakes” not “friction brakes”.
european trucks have a thing called Retarder which are mainly made by VOITH you should make a video about that! its connected to the gearbox.
That's similar to a break saver on a Cat engine I think
Is there a reason why an area of town has signs that say "No Jake Braking"?
For the noise issue the Jake Braking creates from the heavy-duty trucks. Usually there would be residential areas near those particular roadways/highways. Where I live the highway signs will say: "No Engine Braking."
A truck traveling through a town or residential area at 2 AM with the Jake Brake in use could be as noisy as a propeller driven aircraft flying overhead at less than 2000 feet [610 meters] above the local terrain.
noise
So there is not down side
the air brakes weren't explained properly in my opinion. the most important difference compared to the car brakes is that the air pressure in air brakes keeps the brakes unlocked, and when driver hits the brakes the pressure is released, so it's impossible for a truck to lose brakes because of a cut lines, like in movies, if that happens the brakes are on with full force.
Your description on the air brakes was incorrect. When brake pedal is pressed, air pressure does not apply the brakes. Depressing the petal releases air casing the brakes to be applied. Come on man, do you even know what you’re talking about?
Sorry, Mr Kroon, but you are completely wrong! Pressing the brake pedal sends pressure to the chambers & applies the brake.
The emergency & parking brake function is applied by a gigantic spring. A push button sends air pressure to compress the spring to release the park brake.
These are two separate methods of applying brakes.
Watch the video again please.
All the repetition sure did get annoying along with the misinformation! 👎
not true never use on snowy or ice roads the engine brake, or you can end up off the road.
At 4:45
Air brakes....
"...air pressure is used to apply pressure to the brakes...."
Boy you pooch smooched that one!! That used to be the way it worked, back in the 50s and 60s and maybe early 70s. Since then they have reverse the procedure. Air pressure is used to unlock the brakes, since they are in an applied position without pressure. You can't move a semi truck without air pressure!! The brakes are locked!!!!
Applying the break pedal releases that pressure, causing the brakes to apply....
There is two sides to the braking system. The parking brake side uses air to release the spring in the parking brake side of the brake chamber.
The service brake side is actuated by the driver applying the brake pedal.
Known as spring brakes or Maxi brakes, the spring inside that chamber will apply the brakes in the event of a major air loss
@@russvoight1167
I didn't know that.... I thought there was only one side to the brakes.
Wow.. i feel dumber for watching this
😂
dont engine brake in rain and ice.
The section of road I live on is about 2 miles long. It is pretty well lined with houses just outside of town. Speed limit is 45 mph. Apparently there is no engine braking restrictions here. This guy goes past my house on a regular basis. He has been picking up his load about half a mile away from me and hauling it to a site about 2.5 miles the other way. Another truck from this company is almost as bad. On this job they've been running for 11 hours straight so a truck goes past my house every 7 minutes or so. I'm sure the faster he goes, the more loads/money he gets but Is this really necessary? th-cam.com/video/KWmhQjehlnw/w-d-xo.html