hydraulic brake system

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Seminar On Braking System Submitted By:- Parbhat Soni (3407315) Gagan Kumar(3407317) Satish Kumar(3407318) Rakesh Kumar(3407319) Dheeraj(3407320) Anup Malik(3407321)

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Page 1: Hydraulic Brake System

Seminar On Braking System

Submitted By:- Parbhat Soni (3407315) Gagan Kumar(3407317) Satish Kumar(3407318) Rakesh Kumar(3407319) Dheeraj(3407320) Anup Malik(3407321)

Page 2: Hydraulic Brake System

CONTENT Necessity of braking system Function of Brake Hydraulic brake Layout of hydraulic bake system Working Components Master cylinder Single master cylinder Dual master cylinder Bibliography

Page 3: Hydraulic Brake System

Necessity of braking system

IN an automobile, if the pressure from accelerator pedal is removed, the vehicle tend to slow up due to wind resistance, drag of engine and road friction. These forces would stop the vehicle but in present day traffic, this would be quite dangerous. The braking system provide added friction to overcome motion and to slow up the vehicle.

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Function of Brake Brake is used to stop vehicle with in a

reasonable distance.

It helps in controlling the speed of vehicle & to reduce the speed at turnings & other crowded places.

To hold the vehicle in its stationary position.

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Hydraulic brake Hydraulic brakes are

based on the PASCAL’S LAW (i.e. if we apply pressure on a liquid it will be same in every direction). Brakes operate on a simple hydraulic principle. If a force is exerted on the piston putting pressure on the fluid confined in the left hand container, the fluid is forced out through the narrow tube at the bottom and into the right hand container, exerting a force on the second piston, forcing it to move upward.

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Layout of hydraulic bake system

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Working of hydraulic brake

When brake pedal is pressed the working fluid in the master cylinder move towards brake linings. these brake linings are made up of steel tubes. The working fluid in wheel cylinder forces both piston towards outward. these moving piston forces the brake shoe towards rotating drum which retard the motion of rotating drum & hence brakes are applied.

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components of hydraulic brake

There are two main

components of the H.B.S.

Master cylinder Wheel cylinder

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Master cylinder

The master cylinder is the heart of the hydraulic system. It converts the force exerted on the brake pedal into hydraulic pressure that applies the brakes. The master cylinder is mainly of two types one is single master cylinder and another is the dual or tandem master cylinder. Depressing the brake pedal moves a push rod in the master cylinder. Mounted on the push rod, are a pair of pistons (primary and secondary) in tandem (one after the other) that exert force against the fluid in the master cylinder bore. This creates pressure, which along with the fluid that’s displaced by the pistons is routed through the brake lines to each of the wheel brakes.

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WORKING OF THE MASTER CYLINDER

when the brake pedal is pressed piston of the master cylinder moves forward to force the liquid under pressure into system. the liquid pressure is conducted to the wheel cylinder, where it forces the wheel cylinder piston outward. these pistons forces the brake shoes out against the brake drums & the brakes are applied.

as soon as the brake pedal is released the fluid in the brake tubes return back to the master cylinder slowly & brakes are released.

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Inside the master cylinder

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TYPES OF MASTER CYLINDER

The master cylinder is mainly of the following types:-

Single master cylinder

Dual or tandem master cylinder

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SINGLE MASTER CYLINDER

This is the older type has the reservoirs integrally cast with the cylinder to form a single piece master cylinder body. It is usually made of cast iron. It has only one piston. The main disadvantage of this master cylinder was that if leakage in the system occurs then whole braking system will be ineffective.

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DUAL MASTER CYLINDER

Although it has been in use for decades all over the world, the dual (also called “split” or “tandem”) master cylinder is still widely misunderstood, so we had better explain its construction and operation.

A typical late-model specimen will be of the composite variety (aluminum with a plastic reservoir), but iron one-piece units are still around in abundance. Two pistons ride in the bore, and here is where we encounter some confusing terminology. The rear piston is the primary, and the one in the front is the secondary. This apparent misnaming resulted because the rear piston is the first to receive the force of the driver’s leg.

The tandem master cylinder is of course built up in a special way when it’s placed in a dual-circuit braking system. Two small pistons are sitting in the master cylinder in continuation of each other.

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BIBLIOGRAPHY

Wikipedia.org Google.com Mr. Deepak Gumber

Page 17: Hydraulic Brake System