Lack of details. For example shoes linings are not equal/symmetrical in real systems ("leading" and "trailing" shoes are different). Self-adjusting mechanism was not addressed in the video. There are different styles/designs of the drum brakes (shoes and springs configurations).
The Vacuum Booster acts as a servo mechanism, which adds to the force already developed by pressing the brake pedal. The fluid pressure is actually developed by the master cylinder due to the compression process explained in the video.
The operation of the clutch is entirely independent from the application of brakes. In case of manual transmission, we apply clutch pedal and shift to lower gears when braking to ensure that a required torque is maintained. In automatic transmission, the torque converter does the same job without the need of clutch pedal. Without pressing the clutch pedal, the clutch and flywheel are both in contact, even if the brakes are applied. For more on clutch see our transmission system video. Thanks!
Very good video. Perfectly created and very easy to understand braking system with this video !! You should answer what someone asked: "if handbrake is not holding car on incline, which brake is to be replaced"
The function of a fixed caliper is very much similar to the floating one. The only difference is that the position of the caliper remains fixed and the fluid causes both the brake pads to move inwards and apply the brakes.
Thank you for your feedback. This video also clearly shows the energy conversion at 2:06 where it is stated that the brake shoes rub against the drum, generating friction and converting kinetic energy into heat energy. We hope that you found your answer!
Good information but listening to the explanation increases the retention of the information in our memory so u should add the voice explaining it would worth u
The brakes let go when the pedal is released. The entire system shown here works by the brake fluid pressure, which increases when the pedal is pressed and decreases when released. We hope that you found your answer!
In this configuration the two independent brake lines do not appear to be diagonally opposite. As I understand it there can be different designs. Either way it still demonstrates the principle that a rupture of a brake line does not mean total loss of the service brakes. My experience of a rupture was that the brake pedal became very loose and the pedal became active much lower to the floor. There may be different designs that don't feel like that though.
The fluid does leak when the system gets old, and this is one of the common problems in braking system. The brakes become inefficient due to fluid leakage. This happens when the pads and calipers are excessively worn out.
Other than the fact that the wheels are going in reverse, an excellent animation. BUT, this explains how brakes OPERATE, not on how they work. They work by converting kinetic energy into thermal (heat: energy, and I would love to find a good video/animation showing that. Meanwhile, thanks for this one!
Well its a little long to explain but when you apply force on the brakes, the car tends to dive forward so it requires better brake systems in the front which is disc brake. The drum brake is widely used for parking brake in most vehicles and is used in big trucks because of its cheaper cost. The disc brake is way better than drum brake for its reductional friction.
I'm no teacher or have an educational background. And it may just be the visual learner in me... but i swear videos without a narrator make you focus / go in depth to learn it since you really think you missed something.
Hello, I would like to inform you that I will use your video for final elexamen of English that I will translate from English to Spanish. I ask you if you would let me resume it but subtitled in Spanish?
I have a question about how does car/van stop while applying brake. I have ford freestar which have 4 disc brake system. It run only with two front wheel which are connected to transmission or engine. So my question is when I apply the brake pedal, the brake are apply only on front 2 wheels or also on rear wheel?
00:55 oops the primary and secondary pistons (in this video) appear to have over-traveled the brake line ports, which (in this video) have equalized the brake line pressure with the compensating ports (meaning the braking action will fail). In reality, the primary and secondary pistons will not over-travel the ports, thus maintaining brake line pressure. Just FYI for those using this vid as an education instrument. Regards ...
actually if we put force on break pedal, the contact vaccum chamber moves backwards right then how does the force get transferred in the front direction?
Hmm.. I think the vacuum booster piston acts like a pump. When pressed it pump fluid and when released it sucks back the fluid. Because, if it flows under pressure that means the fluid inside reservoir is under pressure, so how to fill it?
Your animation of the master cylinder operation is completely wrong. It shows hydraulic pressure being generated by gravity from the reservoir. The reservoir and brake lines are isolated from each other during braking, otherwise you'd overflow the reservoir.
We can. There are old cars with four wheel drums and most modern cars have four wheel disks. You often see a combination because the front brakes work a LOT harder than the rear ones, and disks do a much better job at getting rid of heat. Cheaper modern cars have rear drums mostly because it's more expensive to work in a hand brake with disks than it is with drums.
and when we move the pedal back what happen to the fluid in the breaks canal does it stay there or back to fluid reservoir. and which force that make him back to the reservoir
+anas the hunter when you turn off the pressure,in the campana there are retracting springs and in the disc there is caliper which does the same thing.
yeah, the act of taking ur foot off the brake pulls the liquid back in. the model used here makes it look like that'd be a rather messy process, which is likely why it wasn't displayed lol.
only about the disc brake. when we apply the brake it causes disc to stop and along with it the hub and wheels also stop but does the axle stop its rotation as u r helpful let me ask 1 more after we release the brake,the force is removed from disc or drum, so how does transfer of power from engine to wheel is prevented. why dosent the car move why do we need to accelerate to start the car thanks in advance love your videos keep uploading
when the brake is applied are the flywheel and clutch attached to each other?. when the brake is applied does the clutch rotate?. after the pedal is released how does the fluid go back to the resoirvoir??
I have a few questions: 1. Why do we need braking systems for front and rear tyres? 2. The caliper unit in the front stops the tyre plates from the outside but the drum unit stops it from the inside, why? 3. For the rear braking unit, what is the 'drum'?
1. Because you want both ends of the car to stop at the same rate. If you didn't have brakes on the rear the back of the car would try to go faster than the front when the brakes are applied, causing the car to spin. Front brakes are needed because as the car slows momentum causes the body to try to go faster than the wheels, causing what is called "weight transfer", that's why when you see someone slam on their brakes the nose of the car pitches down. In fact most of the braking is done by the front brakes, that's why on some cars you will see disk brakes only on the front. 2. A disk system is simpler and is easier to service and build. It also cools much better because the disk is exposed to the air. There ARE drum brake systems that work on the outside of the drum, they are called "band brakes", but you will only find those on very old cars and trucks. More modern systems are inside the drum because it's more compact and you can get greater pressure from a hydraulic wheel cylinder. 3. The "drum" is an iron cover that goes over the rest of the rear brake assembly and may include the hub. It has a machined surface on the inside that the brake shoes push against.
+BadMadPlay Depends on the car, most older cars have rear drum brakes, not disks. Generally you just need to replace the pads, and even then maybe every other time the front brakes are done as the rear brakes don't have nearly the load the fronts do. However, I would be sure to flush out the system every time it's serviced.
BadMadPlay How many miles on the car and have they ever been replaced? Those rear pads don't do a lot of work and tend to last a long time. Before replacing them I'd take a look at how much thickness is left and the condition of the rotors.
thanks sir everythings is clear and every assumption is conformed, including the doubt after applying brakes when the flywheel and clutch qre in contact so why dosent the car move ? might be silly, but its eating my mind....
