5. hydraulic brakes presentation
Post on 13-Sep-2014
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5. hydraulic brakes presentationTRANSCRIPT
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HYDRAULIC BRAKING SYSTEM
Project By:PC Mubashar SharifGC Hafiz M Mudassir BhattiPC Sajid AliNS Asad Ali Janjua
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Hydraulic SystemPower derived from motion and pressure
of a particular liquid such as water or oil. fluid should be incompressible.
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Applications of Hydraulic system
Aerospace IndustryAutomotive IndustryMachine Tool IndustrySteel Mill IndustryOcean Freight Dock Transfer
Equipment
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Braking System
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COMPONENTS OF HYDRAULIC BRAKE
PUSH ROD MASTER CYLINDER BRAKE LINES WHEEL CYLINDER• Wheel disc• Caliper
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Master cylinder
Push rod
caliper
Brake lines Wheel disc
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MASTER CYLINDERCAST IRONPROCESS INVOLVED Sand Casting Machining Internal Threading Finishing Installation of metering valves Installation of gasket.
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TOP VIEW
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RIGHT SIDE VIEW
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FRONT VIEW
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WHEEL DISCSTAINLESS STEELDIE FORGINGMACHINING• Drilling • Boring • Threading • Fine Finishing
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FRONT VIEW
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CALIPERAluminium and Chrome coated steel.Consist of Pistons, Cylinders and Pad shoes.Pad shoes of rubbers or high wearing
resistance material.Process involvedCasting or ForgingMachiningFinishing
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LEFT SIDE VIEW
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TOP VIEW
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FRONT VIEW
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ANTI-LOCK BRAKESABS, (Anti-Lock brake system)ABS allows the driver to maintain steering
control of the vehicle while in hard braking situations .
Computerized ABS is designed to keep the wheels from locking as the brakes are applied.
A locked wheel provides very little or no directional control
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Anti-Lock Braking Systems 23
Vehicle ABS SystemSpeed Sensors on
Wheels are Monitored by On Board Computer
Radical Speed Differences Trigger ABS Action
ABS “Pumps” the Brakes 18 Times per Second
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Road Surface
Weather Conditions
Tire Tread and Inflation
Braking Techniques
Speed
Steering Inputs
T – 9.9
Critical Tire Traction Depends On:
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Anti-Lock Braking Systems 25
Vehicle ABS SystemABS Systems
“Counter-Intuitive” OperationsGrinding Sounds
from All WheelsPulsating or Soft
Brake PedalDriver Can Still
Steer (with Reduced Effect)
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ANTI-LOCK BRAKESThe best braking action occurs at between
10-20%. If vehicle speed and wheel speed is the same
wheel slippage is 0%A lock-up wheel will have a wheel slippage of
100%
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Vehicle Systems — ABS Brake System
Enhanced Braking Action
Reduced Stopping Distance
Increased Vehicle Stability
Enhanced Vehicle Steerability
ABS Advantages
Braking and Steering
Braking ONLY
In many emergency situations braking alone may not prevent a collision.
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Any Questions?