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Hydraulic brakes // Presentation // Love Soni
This document discusses hydraulic brakes. It begins with an introduction to brakes and hydraulics. It then covers the main components of hydraulic brakes including the master cylinder, wheel cylinder, brake shoes, brake drum, and brake fluid. It explains how these components work together based on Pascal's law. Finally, it lists the advantages as equal braking to all wheels and increased braking force, and the disadvantages as failure if fluid leaks or air enters the system.
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Hydraulic brakes // Presentation // Love Soni
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- 2. LOGO CONTENTS INTRODUCTION TYPES PRINCIPLE CONSTRUCTION a) MASTER CYLINDER.. b)WHEEL CYLINDER. c) BRAKE SHOES. d) BRAKE DRUM. e) BRAKE FLUID. SYSTEM OPERATION ADV. AND DISADV. OF HYD. BRAKES Love soni
- 3. LOGO BRAKES A brake isa mechanical device which inhibits motion. Love soni
- 4. LOGO INTRODUCTION HYDRAULIC BRAKES: Hydraulics isthe use of a liquid under pressure to transfer force or motion, or to increase an applied force. The pressure on a liquid is called hydraulic pressure. HISTORY: In 1918 Malcolm Lockheed developed a hydraulic brake system. Love soni
- 5. LOGO TYPES OF BRAKES Mechanical Brakes HydraulicBrakes Power Brakes Love soni
- 6. LOGO PRINCIPLES OF HYDRAULIC BRAKING Hydraulic brakeswork on the principle of Pascal’s law which states that “pressure at a point in a fluid is equal in all directions in space”. According to this law when pressure is applied on a fluid it travels equally in all directions so that uniform braking action is applied on all four wheels. Love soni
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- 8. LOGO a) MASTER CYLINDER Themaster cylinder is the heart of the brake's hydraulic system. It converts the force exerted on the brake pedal into hydraulic pressure to apply the brakes. 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. The pressure created displaces fluid through the various brake circuits and lines to each of the wheels and applies the brakes. Since brake fluid is incompressible it acts like a liquid linkage between the master cylinder's pistons and the calipers and wheel cylinders. Love soni
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- 10. LOGO b) WHEEL CYLINDER A wheelcylinder is a component in a drum brake system. It is located in each wheel and is usually at the top, above the shoes. Its responsibility is to exert force onto the shoes so they can contact the drum and stop the vehicle with friction. Love soni
- 11. LOGO c) BRAKE SHOES Brakeshoes are made of two pieces of sheet steel welded together. Love soni
- 12. LOGO d) BRAKE DRUM Thebrake drum is generally made of a special type of cast iron. It is positioned very close to the brake shoe without actually touching it, and rotates with the wheel and axle. Love soni
- 13. LOGO e) BRAKE FLUID Brakefluids are used to transfer force into pressure. It works because liquids are incompressible. Since oils damage rubber seals and hoses in the braking system, brake fluids are not petroleum- based. Most brake fluids used today are glycol- ether based, but mineral oil and silicone (DOT 5) based fluids are also available. It is a special type of fluid named SAE-1703J and must meet the following requirements: Love soni
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- 15. LOGO ADVANTAGES AND DISADVANTAGES OF HYDRAULICBRAKES Advantages a) Equal braking action on all wheels. b) Increased braking force. c) Simple in construction. d) Low wear rate of brake linings. e) Flexibility of brake linings. f) Increased mechanical advantage. Love soni
- 16. LOGO Disadvantages a) Whole brakingsystem fails due to leakage of fluid from brake linings. b) Presence of air inside the tubings ruins the whole system. Love soni
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