SEMINAR ONSEMINAR ON ELECTRONIC BRAKING ELECTRONIC BRAKING

SYSTEM(EBS)SYSTEM(EBS)

PRESENTED BY:PRESENTED BY:

SMARAK MOHANTYSMARAK MOHANTYRegdRegd No No - 0521212015- 0521212015

CONTENTSCONTENTS

IntroductionIntroductionDisadvantage of CABSDisadvantage of CABSWhat is EBS?What is EBS?Share Market Study of EBSShare Market Study of EBSEBS ComponentsEBS ComponentsOperationOperationBenefits of EBSBenefits of EBSObjectivesObjectives

INTRODUCTIONINTRODUCTION

• • Development started in early 1980’sDevelopment started in early 1980’s

• • Achieved full development team strength inAchieved full development team strength in

early 1990’searly 1990’s

• • Active field testing began mid-1990’sActive field testing began mid-1990’s

• • Production began in July, 1996Production began in July, 1996

• • EBS systems are now standard productionEBS systems are now standard production

in Europein Europe

DISADVANTAGE OF COMPRESSED AIR DISADVANTAGE OF COMPRESSED AIR BRAKING SYSTEMBRAKING SYSTEM

time delay and superfluous energy time delay and superfluous energy consumption because of the compressibility of consumption because of the compressibility of air.air.

relatively low pressures and therefore big relatively low pressures and therefore big dimensions.dimensions.

contamination, water content, oil and coke in contamination, water content, oil and coke in the air. the air.

WHAT IS EBS?WHAT IS EBS?

EBS, or "brake-by-wire,"integrates anti-lock braking EBS, or "brake-by-wire,"integrates anti-lock braking system(ABS) technology,automatic traction control (ATC) and system(ABS) technology,automatic traction control (ATC) and other key Vehicle control system features to deliver the next other key Vehicle control system features to deliver the next generation of braking control.generation of braking control. utilizes electronics for the control side of the vehicle's braking utilizes electronics for the control side of the vehicle's braking system system

. An electronic signal replaces the air signal sent by the brake . An electronic signal replaces the air signal sent by the brake pedal to activate the brakes, improving stopping distances and pedal to activate the brakes, improving stopping distances and

braking system performancebraking system performance

EBS COMPONENTSEBS COMPONENTS

CENTRAL BRAKE UNIT(CBU)CENTRAL BRAKE UNIT(CBU)Combines the functional groupsCombines the functional groups

central ECUcentral ECU brake signal transmitterbrake signal transmitter proportional relay valveproportional relay valve

Provides the primary brake management function for front Provides the primary brake management function for front axle, rear axle and trailer pressure control and evaluates the axle, rear axle and trailer pressure control and evaluates the sensor signalssensor signalsGenerates an electrical signal and pneumatic back-up pressure Generates an electrical signal and pneumatic back-up pressure from the driver’s pedal actuation; controls the required front-from the driver’s pedal actuation; controls the required front-axle brake pressure automaticallyaxle brake pressure automatically Communicates with other vehicle systems and diagnostic Communicates with other vehicle systems and diagnostic interfacesinterfaces

Brake signal transmitterBrake signal transmitter

Generates an electrical signal and Generates an electrical signal and pneumatic backuppneumatic backup

pressure from the driver's pedal pressure from the driver's pedal actuationactuation

Central moduleCentral module

Braking system ECU Braking system ECU Controls all essential brake management Controls all essential brake management

functions for the front axle, the functions for the front axle, the

rear axle and trailer pressure control,as well as rear axle and trailer pressure control,as well as front axle ABS control front axle ABS control

Evaluates sensor signals and communicates as Evaluates sensor signals and communicates as well as the diagnostic interfaces well as the diagnostic interfaces

Proportional relay valveProportional relay valve

Performs front-axle braking pressurePerforms front-axle braking pressure

controlcontrol

Rear-axle modulatorRear-axle modulator Controls the rear-axle brake pressureControls the rear-axle brake pressure

and actuates the electro-pneumaticand actuates the electro-pneumatic

trailer control valvetrailer control valve

Electro-pneumatic trailer control valveElectro-pneumatic trailer control valve

Regulates trailer control pressureRegulates trailer control pressure

OPERATIONOPERATION EBS consists of a single-circuit EBS consists of a single-circuit electropneumatic section, supported by a dual electropneumatic section, supported by a dual circuit,pneumatic section as a redundancy. circuit,pneumatic section as a redundancy. Depending on the pedal position, the Depending on the pedal position, the brake brake signal transmitter signal transmitter generates electrical generates electrical signals and pneumatic pressures. The signals and pneumatic pressures. The electrical signals are used to control the electrical signals are used to control the electronic braking system. modulator.electronic braking system. modulator.

The pneumatic signals are used inThe pneumatic signals are used inredundancy case only and perform – to aredundancy case only and perform – to alimited extent – the same functions. Thelimited extent – the same functions. Theelectrical signal is transmitted to the electrical signal is transmitted to the centralcentralmodule.module. According to the vehicle’sAccording to the vehicle’sload situation, the system calculates theload situation, the system calculates theappropriate pressures for the individualappropriate pressures for the individualbrake cylinders, causing deceleration ofbrake cylinders, causing deceleration ofthe vehicle. The determined values arethe vehicle. The determined values arethen sent to the proportional relay valvethen sent to the proportional relay valveand via the system’s data bus to the rearaxleand via the system’s data bus to the rearaxle

BENEFITS OF EBSBENEFITS OF EBS EBS improves braking comfortEBS improves braking comfort EBS increases vehicle safetyEBS increases vehicle safety EBS optimizes brake wearEBS optimizes brake wear EBS makes maintenance easierEBS makes maintenance easier Reduces the number of brake system components and air lines Reduces the number of brake system components and air lines Enhanced diagnostics of the complete braking system Enhanced diagnostics of the complete braking system Detects brake fade and notifies the driver if wear levels become Detects brake fade and notifies the driver if wear levels become

critical critical Provides more predictable braking control Provides more predictable braking control Shortened stopping distances Shortened stopping distances Improved vehicle stability and driver control Improved vehicle stability and driver control Brake "feel" like a passenger car Brake "feel" like a passenger car

ELECTRONIC BRAKING SYSTEM ELECTRONIC BRAKING SYSTEM

(EBS)(EBS)

WITHWITH

ELECTRONIC STABILITY CONTROLELECTRONIC STABILITY CONTROL

(ESC)(ESC)

OBJECTIVESOBJECTIVES

• • Detect potential spin-out situationsDetect potential spin-out situations

• • Assist driver in keeping intended courseAssist driver in keeping intended course

during cornering maneuversduring cornering maneuvers

• • Stabilize vehicle when lateral traction limitsStabilize vehicle when lateral traction limits

are exceededare exceeded

– –Controls tractor and / or trailer brakesControls tractor and / or trailer brakes

– – Speed reduction by engine and brake controlSpeed reduction by engine and brake control

REFERENCESREFERENCES

www.google.co.inwww.google.co.in

Paithankar,Y.G.,Bhide,S.R.,”FundamentalPaithankar,Y.G.,Bhide,S.R.,”Fundamentals of power systems protection”s of power systems protection”

Gupta,J.B.,“Theory and performance of Gupta,J.B.,“Theory and performance of electrical machines”electrical machines”

THANKS