embeddedsysteminautomobile-130717101413-phpapp021-140219084837-phpapp01.pptx

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EMBEDDED IN AUTOMOBILES BY M.Dilip Gupta 10841A04A6M.Dilip Gupta10841A04A61CONTENTDefinitionEmbedded system componentsCharacteristicsDesign processChallengesTodays tech in automobilesAir bagsBlack boxAbsAutomatic stability controlDrive by wireconclusion

Embedded System- Definition?

An embedded system is acombination of hardware andsoftware which creates adedicated computer systemthat performs specific, pre-defined tasks and which isencapsulated within thedevice it controls (if it is partof a larger device).Beginning course details and/or books/materials needed for a class/project.3Embedded system components

Beginning course details and/or books/materials needed for a class/project.4Characteristics of embedded systems User InterfaceReal-time operation Multi RateLow manufacturing cost.Low power

Beginning course details and/or books/materials needed for a class/project.5Design ProcessChallenges During Design ProcessHardwareDeadlinesPower ConsumptionUpgradeabilityReliabilityAutomotive Systems: Technology in today's vehicleAir BagsRain-sensing WipersEmission ControlTraction ControlAutomatic ParkingBack-up collision sensor Navigation SystemsTire Pressure MonitorClimate Control

Beginning course details and/or books/materials needed for a class/project.8Air Bags : Principle of functionIt is from the Newton's 2nd law of motionAIR BAGS are among the most important safety improvements added to cars and light trucks in recent years, providing extra protection for front-seat occupants in head-on crashes.And of late, every passengers protection.

Fig : Air Bag- WorkingBeginning course details and/or books/materials needed for a class/project.9Event Data Recorder-EDR or the The "Black Box"The Event Data Recorder (EDR) in an automobile is based upon the sensors and microprocessor computer system that are used to activate the airbag in the vehicle during a crash. The SDM, which is controlled by a microprocessor, has multiple functions:It monitors the air bags components;It permanently records information.

Black Box Exterior ViewBlack Box Interior ViewBeginning course details and/or books/materials needed for a class/project.10Anti-lock Braking System(ABS)Up until the seventies, hitting the brakes too hard could lead to an accident.On preventing wheel lock-up:Reduces the total braking distance as far as possibleIncrease vehicle stability

Without ABS The vehicle in no longer steerable when driver hits the brakeWith ABS The vehicle remains steerable even during panicBeginning course details and/or books/materials needed for a class/project.11Principle of functioning of an ABSThe function of an anti-lock brake system is to minimize skidding by releasing brakes on wheels(it does so when wheels are moving slowly)An ABS is placed between brakes and hydraulic pump It uses sensor for each wheel ,so that the speed of the wheel can be measured,then these speeds are used by the abs to identify the amount of hydraulic fluid pressure that needs to be varied to reduce skidding

Beginning course details and/or books/materials needed for a class/project.12Automatic Stability ControlThe function of ASC+T system is to improve the stability of the car during its movement.Gear shifting ,ignition timing ,throttle and different brake are the four systems controlled by ASC+T systemIt plays an important role different tire snows operation.This can be turned ON or OFF by the driver.

Beginning course details and/or books/materials needed for a class/project.13Automatic Stability Control

Fig: The Principle of Functioning of TCS with brakesBeginning course details and/or books/materials needed for a class/project.14Intelligent Cruise ControlCooperative Adaptive Cruise Control with Collision Warning (CACC + CW) CACC: Cruise at given speed when the road is clear (cruise control) otherwise follow the car in front, using radar (adaptive) and/or communications (cooperative). CW: Warn the driver when an object is being approached too fast, or is too closeHow it works :Uses forward-looking radar, installed behind the grill of a vehicle, to detect the speed and distance of the vehicle ahead of it. Can automatically adjust speed in order to maintain a proper distance between vehicles in the same lane

Beginning course details and/or books/materials needed for a class/project.15Drive by wireDrive-by-Wire replaces mechanical connections push rods,rack & pinion, steering columns, overhead cams, cables by mechatronic connections sensors, actuators, embedded microprocessors, control software

Fig: Drive-by-Wire Throttle Control

Fig: Future Car with drive by wire technologyBeginning course details and/or books/materials needed for a class/project.16Conclusion : Its a connected drive

Beginning course details and/or books/materials needed for a class/project.17Quries..?Thank you