Pople in Indonesia are dumbass so i will ask this to you, American, ( don’t answer like thoose idiots that say “Train aren't different than car" and there came 2nd idiot that copy-paste the answer from the 1st idiot
Rail - 8 Answers
Random Answers, Critics, Comments, Opinions :
1 :
I believe train brakes are controlled by air pressure, like a large road vehicle such as a lorry or bus. High air pressure is maintained between the wheels and the brakes, which holds the brake pads off the wheels, and when the driver brakes, the air is released, allowing the brake pads to apply. Lots of train systems are often connected to the brakes, such as safety systems, door locking systems etc. If a key system fails, for example a door unlocks, then the train will automatically bleed all air out of the brakes, which will stop the train as a safety measure.
2 :
There are 2 types of train brake: the air brake and the vacuum brake. Both kinds are 'fail safe', that is, they rely on maintaining the air pressure or vacuum to keep the brake off, and if the air supply is interrupted or the vacuum destroyed for any reason, the brakes will activate. The main control for either type of brake is on the driver's console in the cab and usually consists of a lever which when moved in one direction will close the release valve allowing the air or vacuum pump to build the pressure or create the vacuum to take the brakes off, and when moved the other way will release the air or destroy the vacuum, thus bringing on the brakes. Each car in the train is connected by a hose to the next and to the engine. If the train has a guard (conductor) they will also have a brake control. Passenger cars have a lever which can be operated in an emergency. When pulled the lever partially applies the brakes and sounds a warning to the driver. The brake mechanism consists of cylinders, the pistons of which are connected to rods and cranks which in turn are connected to the brakes. Older vehicles have brakes which act on the wheel tread while newer ones have disc brakes or inertia brakes. On a typical British vacuum brake the cylinder is vertical and when the vacuum is created, air pressure from below pushes a piston to the top of the cylinder and the brakes are off. Destroy the vacuum and the piston sinks and the brakes are applied. Each locomotive and car also has a hand brake which is used to immobilise the vehicle when stationary. In the UK and some other countries both types of brakes are in use and locomotives are therefore often fitted with both systems so they can work with either type of train. Light rail vehicles also use a type of brake known as the rheostatic brake. This is where the polarity of the electric motors is reversed so that they become generators instead. The load on the generators slows the car down. The power thus produced is then used partly to activate electromagnetic brakes and partly fed back into the current supply system so it can be used by other vehicles. There is a steep hill in London where trams (street cars) used to run. One would start at the top of the hill on one track and another would start from the bottom on the adjacent track. The descending vehicle had its rheostatic brakes on and the ascending one would use the current produced to help it climb the hill.
3 :
Train brakes tend to be fail safe. They actually work in the opposite way to a car. In a train a cylinder attached to the pressure line pushes the brake off. To apply the brakes you release the pressure and a spring applies the brakes. This means that if the brake systems fail or the high pressure line is broken then the brakes jam hard on. This is very important in event of an accident where the train gets divided. Air brakes in lorries and hydraulics in cars work the other way. The brake is naturally off and you use pressure to apply the brakes. If the line is cut then you have no brakes. Historically trains in Britain used vacuum brakes. These work the same way except that you pump the air out of the brake pipe. The vacuum holds the brake off and you bleed air into the pipe to apply the brakes. The detailed design is quite complicated. In order to make the brakes act quickly they put valves on every coach. When the driver applies the brakes all the valves open to reduce the pressure. A second pressure pipe is used to quickly restore the pressure when the driver takes the brakes off. Some modern trains supplement the mechanical brakes by driving electric generators from the wheel. The electricity is either wasted as heat in resistors in the roof or a clever systems puts it back into the overhead electric wires.
4 :
its mostly the engine brakes but there are also hydraulic brakes like in a car.
5 :
Those people in Indonesia arent so dumb as you think, just because they dont know how a train brake works, lighten up. Freight train air brakes work off air pressure, there is a line connecting all the cars, pressurizing the system. When pressure is reduced in they system it allows air from a tank to move into a cylinder, which pushes a piston actuating the brakes. It is not vacuum although it operates similarly because it is a reduction in air pressure that causes the brakes to apply. It is not fail-safe although it is incredibly reliable it can and does fail.
6 :
In the USA a freight train's brakes work as follows.A brake pipe run the length of the the train.It holds 90 pounds of air(for a freight train,passenger trains run higher brake pipe pressure).Each car has an air tank pressurized to the same pressure as the brake pipe.When an engineer sets the brakes air is removed from the brake pipe.This causes a control valve on the cars to open and let air out of the tank on the car.That air flows to a piston causing the brake shoes to apply on each car.When the brake pipe pressure and the tank pressure equalize the control valve closes.The more air removed from the brake pipe the harder the brakes apply.Once the brakes are set you can't ease off the brakes on a freight train.If you set too much air you have to release the brakes and start over.Passenger trains have what's called graduated release that allows the engineer to ease off the amount of braking force applied to the trains wheels.When the brakes are released the brake pipe pressure rises causing the control valve on the car to release the air pressure in the piston.The control valve also lets air start flowing back to the tank on the car to recharge the tank.The more air you set the longer it takes to recharge the system.Til it's recharged your brakes aren't as effective as they were when you first set the brakes.Of course there's more to it than that but that's basically how they work.
7 :
AIR--THE TWO BLACK HOSE YOU CONNECTED BETWEEN TWO CARS IS A AIR LINE-- EACH CAR HAS A AIR RESIVOIR--WHEN ENGENIER SETS THE BRAKE IN THE ENGINE--AIR RUSHES THROU.GH ALL AIR LINES TO SET BRAKES ON EACH CAR--IF A TRAIN IS A MILE LONG --IT WILL TAKE A MILE OR MORE TO STOP TRAIN---PLEASE DO NOT CROSS A CROSSING WHEN THE GATES ARE DOWN--YOUR CAR CAN GET CAUGHT ON THE TRACKS AND STALL.. IF THE TRAIN HAS LOADS ON EACH CAR IT CAN TAKE MUCH LONGER TO STOP TRAIN.
8 :
There are several types of braking systems used on trains. Disk Brakes as one example. If you own a bike, you already know what it is. A pad that, when applied to the weels, slows down the train. Air Brakes, Similar to disk brakes. The difference is that compressed air is what pushes the pads onto the wheels slowing down the train. Regenerative Braking, uses energy to brake and at the same time, saving that same energy for further use or sending it back into the electrical grid. But at around 5mph, friction brakes take over to bring the train to a halt.
