Anti-Lock Braking System

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  • Topic: Anti-lock braking system, Electronic stability control, Vehicle braking technologies
  • Pages : 14 (4452 words )
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  • Published : March 9, 2013
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MUKESH PATEL SCHOOL OF TECHNOLOGY MANAGEMENT
& ENGINEERING
SHIRPUR, Dist. DHULIA (M.S) - 425405.

Seminar Report On: -
“ANTI-LOCK BRAKING SYSTEM (ABS)”

Submitted in partial fulfillment of the requirements for the

2nd Year B.Tech. (Trimester V)
“KINJAL PATEL”

Roll No: F046 (SAP ID) 71201110009

CERTFICATE
This is to certify that the seminar entitled “ANTI-LOCK BRAKING SYSTEM” has been submitted by KINJAL PATEL under the guidance of Prof. SATISH VERMA in partial fulfillment of the requirements of the degree of Bachelor of Technology in Mechanical Engineering of MPSTME, NMIMS University, Shirpur during the academic year 2012-2013. (Trimester-V)

DATE: 20-12-2012
PLACE: Shirpur

Guide H.O.D Associate Dean Prof.SATISH VERMA Prof. Vishal Fegade Dr. M.V Deshpande

ANTI-LOCK BRAKING SYSTEM
CONTENTS

SR.NO| CONTENTS| PAGE NO|
1| INTRODUCTION| 2|
2| PRICIPLE OF WORKING OF SIMPLE HYDRAULIC SYSTEM| 7|
3| PRINCIPLES| 8|
4| ABS COMPONENTS| 10|
5| TYPES OF ANTI LOCK BRAKE SYSTEM| 13|
6| FOUR WHEEL SYSTEM| 14|
7| ADVANCEMENTS OF ABS| 16|
8| ADVANTAGES OF ABS| 18|

ABSTRACT
Anti-Lock Braking Systems (ABS) are designed to maintain driver control and stability of the car during emergency braking. Locked wheels will slow a car down but will not provide steering ability. ABS allows maximum braking to be applied while retaining the ability to 'steer out of trouble

 The theory behind anti-lock brakes is simple. A skidding wheel (where the tire contact patch is sliding relative to the road) has less traction than a non-skidding wheel. By keeping the wheels from skidding while you slow down, anti-lock brakes benefit you in two ways: You'll stop faster, and you'll be able to steer while you stop.      An ABS system monitors four wheel speed sensors to evaluate wheel slippage. Slip can be determined by calculating the ratio of wheel speed to vehicle speed, which is continuously calculated from the four individual wheel speeds. During a braking event, the function of the control system is to maintain maximum possible wheel grip on the road - without the wheel locking - by adjusting the hydraulic fluid pressure to each brake by way of electronically controlled solenoid valves.

Stopping a car in a hurry on a slippery road can be very challenging. Anti-lock braking systems (ABS) take a lot of the challenge out of this sometimes nerve-wracking event. In fact, on slippery surfaces, even professional drivers can't stop as quickly without ABS as an average driver can with ABS.

2. INTRODUCTION

Car manufacturers worldwide are vying with each other to invent more reliable gadgets there by coming closer to the dream of the ‘Advanced safety vehicle’ or ‘Ultimate safety vehicle’, on which research and development has been going on for the past several year. Most of the newer vehicle models offer ABS as either standard or optional equipment .Wheel lockup during braking causes skidding which in turn cause a loss of traction and vehicle control. This reduces the steering ability to change direction. So the car slides out of control. But the road wheel that is still rotating can be steered. That is what ABS is all about. With such a system, the driver can brake hard, take the evasive action and still be in control of the vehicle in any road condition at any speed and under any load. ABS does not reduce stopping distance, but compensates the changing traction or tyre loading by preventing wheel lockup.

   During panic braking when the wheels are about to lockup, sensors sense that the wheel...
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