Hydraulic Brakes Essay

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The purpose of the brakes is stopping the vehicle in motion by converting the kinetic energy of the moving vehicle into rotational frictional torque at the brake-shoes or the brake-pads. This energy then will change into heat. The hydraulic braking system, most commonly used, is a compact method of transmitting the driver’s foot pedal effort to the individual road-wheel brakes by conveying pressurized fluid from one position to another and then converting the fluid pressure into useful work at the wheels to apply the brakes and so stop the rotation of the wheels. The fluid in the hydraulic braking system is incompressible and has got a high boiling point. The braking system has four main components and they are as follows: 1. Brake pipes these provide a continuous fluid circuit between the master-cylinder and the wheel-cylinders. The brake pedal pass on the driver’s foot effort to the master cylinder piston which compresses the brake fluid. This pressure is equally transmitted throughout the fluid to the front disc-caliper pistons and to the rear wheel cylinder pistons. Steel pipes convey the fluid along the body structure and rigid axel members, but flexible hoses connect the sprung body pipes to the unsprung axel wheel-brake units, to allow for relative movement. 2. Master-cylinder converts foot-pedal force to hydraulic pressure within the fluid system by means of the cylinder and piston every time the drivers’ foot applies a load on the pedal. 3. Disc-brake consists of a disc bolted to the wheel hub and sandwiched between two pistons and friction pads supported in a caliper fixed to the stub-axle. When the brakes are applied, the pistons clamp the friction pads against the two side faces of the disc. 4. Drum-brake this consists of two brake-shoes and lining supported on a back plate bolted to the axel-casing. These pivot at one end on anchor pins

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