Nov 30, 2015 compared to drum brakes, disc brakes provide greater stopping power and dont overheat as quickly under heavy use. Twowheelers such as scooters, commuter bikes, threewheelers including autorickshaws widely use drum brake system for braking. An electromagnet is mounted on the backplate and armature disc is fed to the drum. Brake operating principles 2 square inch 20 square inch pascals law states that pressure is equally applied to all areas within a closed hydraulic system. This is the part of the brake system that does the actual work of stopping the car. Todays motorcycles and cars are equipped with a very efficient braking system.
Dec 11, 2018 the master cylinder, also known as the master brake cylinder, converts the pressure on the brake pedal to hydraulic pressure by feeding brake fluid into the brake circuit and controlling this according to the mechanical force. In brakes we call this brake fluid of which there are a few different varieties, but more on that later. In this animation, we want to explain a disk brake with a ventilated brake disk. The term power hydraulic brakes can also refer to systems operating on very different principles where an enginedriven pump maintains continual. Disc brakes use the same principle as bicycle handbrakes, but on a bike the brake pads press against the wheel itself. When brake pad is released, the piston moves inward, the brake pad away from the rotating disc. Nomenclature knorr sn7 exploded view meritor ex225 exploded view 8.
This is why they used to be referred to as electro mechanical clutches and brakes. Working of drum brakes drum brakes work on the same principle as the disc brakes. Disc brakes are a brake system that slowly a wheels rotation by force an attached element disk in a viselike hydraulic caliper. Thus the wheels of the vehicle also slow down since the wheels are directly coupled to the disc of the eddy current brake, thus producing smooth stopping motion. Disk brake part 4 working principle, advantages and. Two actuating discs have holes drilled in each disc in which steel balls are placed. Microsoft powerpoint wheels on disc brake inspection 1. Apr 17, 2018 disk brakes are used in many modern vehicles. Automatic braking system in this system we use a sensor based technology in which when vehicle move on the road and any obstruct comes in front of vehicle then sensor senses the obstruction and immediate offer a braking. The brake band directly surrounds the drum mounted on the drive axle. Stop the vehicle by converting kinetic energy to heat energy. Disc brakes are the most common brakes found on a cars front wheels, and theyre often on all four. What is the principle of hydraulic brake system answers.
Sep 12, 2015 brakes is one of the most important element of automobile. Disc brake seminar ppt with pdf report brake basics leverage hydraulics friction why. National call centre this fully computerised call centre handles all customer service. Understanding your motorcycles brake disc brake youtube.
Aug 04, 2017 principle of working it works on the principle of threshold braking and cadence braking. The shoes are pulled away from the drum by the springs when the brakes are released. It increases the pedal force 2 to 4 times depending on the size of the diaphragm. A disc brake consists of a rotating disc and two friction pads which are actuated by hydraulic braking system as described earlier. How do drum brakes work in cars and light vehicles. Drum brakes work on the same principle as the disc brakes.
Disc brake construction, working principle, types and rotor materials brake rotors of disc brakes rotate with the wheels, and brake pads, which are fitted to the brake calipers, clamp on these rotors to stop or decelerate the wheels. This page contains disc brake seminar and ppt with pdf report. There are many types of electromagnetic brakes tooth, multiple disc, hysteresis, magnetic particle. When the pedal is depressed, the band tightens the drum. Till now we have seen parts of disk brake assembly like brake disc rotor, caliper assembly and master cylinder assembly. Generally there are two brake pad per caliper in disc brake. Working principle and application of brake motoranhui wannan. Parking breaks in this configuration consist of a set of disc or drum brakes held in lock position by a spring mechanism.
Disk brake seminar report, ppt, pdf for mechanical. In this way, as the load increases over the rear axle. This system adds hydraulic pressure to the brake system, so when you push the brake pedal, it increases the pressure on the. Because the brake pads in disc brake systems are external to the disc rather than contained within a drum, they are more easily ventilated and heat doesnt tend to build up quite as fast.
Newer cars have a power brake booster or power disc brake system. Nov 11, 2018 hydraulic brake is a type of braking system which is widely used in the automobiles with the application of the hydraulic fluid. The working principle of hydraulic braking system is purely based upon pascals law, which states that the intensity of pressure exerted inside a closed system by the liquid is always equal in all the directions. A hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically containing glycol ethers or diethylene glycol, to transfer pressure from the controlling mechanism to the braking mechanism. They rub against disc when brakes are applied to stop the vehicle. A disk brake works on the principle of pascals lawprinciple of transmission of fluid pressure. Introduction a drum brake is a brake in which the friction is caused by a set of shoes or pads that press against a rotating drumshaped part called a brake drum. Cadence braking and threshold braking is a technique in which a driver applies the brakes and releases it before locking up the wheel and then applies the brakes and releases it again before locking.
Hydraulic brakes the principle of hydraulic brakes based on the pascals law. A free powerpoint ppt presentation displayed as a flash slide show on id. The function of all the components of hydraulic brakes. Electromagnetic brakes operate electrically but transmit torque mechanically. Dec 03, 2010 till now we have seen parts of disk brake assembly like brake discrotor, caliper assembly and master cylinder assembly. Disc brakes are a brake system that slows a wheels rotation by squeezing an attached metal disc in a viselike hydraulic caliper. Brake operating principles linnbenton community college. Conventional systems of braking such as drum brake, disc brake, hydraulic brakes, pneumatic brakes etc. Now both the brake pads are pushes the rotating disc, a large amount of friction is generated in between the pads and rotating disc and slows down the vehicle and finally let it stop. Theses are primary brake, secondary brakes, vacuum brake, air brake, disk brake, drum brake etc. Find out all about disc brakes even when to replace the pads. There are many types of brakes available in automobile industries. The brake booster is designed to create a greater braking force from a minimum pedal effort, using a difference in atmospheric pressure and the engines manifold vacuum. Disc brake the disc brakes are completely selfadjusting and present in wide range.
Antilock braking system abs working principle, main. Also explore the seminar topics paper on disk brake with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Braking system types mechanical, hydraulic, power brakes. Types of brakes disc brake drum brake air brake hydraulic brake vaccum brake electromagnetic brake automatic braking system. The brake pads pushing against the rotors generate friction, which transforms kinetic energy into. When the brake pedal is depressed, the links help to move the two discs in opposite directions.
This type of brake is also often used in motorsports. The friction pads remain free on each side of disc when brakes are no applied. In india, most of the motorcycles have a disc brake on the front wheel and a drum brake. Later, disc brakes were used for the front and drum brakes for the rear. Explore disk brake with free download of seminar report and ppt in pdf and doc format. Mbta, custom training aids, and other members of the apta brake and chassis work group title microsoft powerpoint wheels on disc brake inspection 1. A disc brake is a type of brake that uses the calipers to squeeze pairs of pads against a disc or.
A disk brake works on the principle of pascals law principle of transmission of fluid pressure. This braking system produce higher amount of friction which produces heat wear and tear of braking parts and eventually reduces efficiency of braking system. Disc brake basics how disc brakes work howstuffworks. Essentially an eddy current brake consists of two members, a stationary magnetic field system and a solid rotary member, generally of mild steel, which is sometimes referred. Till now we have seen parts of disk brake assembly like brake discrotor, caliper assembly. The principle of working of this type of brake is to utilize the electromagnetic force on the brake shoes. Friction is created between a moving and non moving surface at each wheel to generate the heat. But what is the principle behind disk brake and how it works. First part explains the principle and the caliper side working. Disc brake seminar ppt with pdf report study mafia. A hydraulic brake is an arrangement of braking mechanism which uses brake fluid, typically.
Principle of working hydraulic brakes work on the principle of. The basic master cylinder is modified and the fluid reservoir is removed. The brake booster is located between the brake pedal and the master cylinder. Disc brake construction, working principle, types and. What is disc brake, what are its types and how it works. The working of a disc brake is based on pascal law. If the electromagnet is not energized, the rotation of the disc is free and accelerates. The most widely used version is the single face design. Working principle the working principle of the electric retarder is based on the creation of eddy currents within a metal disc rotating between two electromagnets, which sets up a force opposing the rotation of the disc see figure 2. Mar 08, 2018 working of an air brake systema typical air brake system configuration for a heavy vehicle consists of service brakes, parking brakes, a control pedal and an air storage tank.
The principle behind any hydraulic system is simple. They are so efficient that your vehicle stops safely, within a fraction of a second, in the case of an emergency. While some entrylevel vehicles use drum brakes on the rear wheels, fourwheel disc brakes are commonly found on everything from family sedans, to trucks, to highperformance sports cars. Hydraulic brakes work on the principle of pascals law which states that pressure. Force pressure x area small piston less force more travel large piston more force less travel 200 lbs force 2,000 lbs force 10 inch travel 1 inch travel.