BRANCH AUTOMOBILE ENGINEERING

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SEM 5^TH ,WINTER-2021

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SUBJECT AUTO ELECTRICITY

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CHAPTER 06

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TOPIC LIGHT

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FACULTY Er. BALADHARA JENA

•History

•Head light types

•Head light systems

•Reflector technology

•Light sources

•AFS

Contents

History

Historic development in Automotive Head Lights; Source: [1]

Head light types

•Dim light

•Main light

•Add on head light

•Adverse weather light

•Backup light

•Spot lights

•Search head lights

Head light types

•Dim light

Head light level: 0,65 m, cone of light length: 65 m -> 1%

Head light types

•Dim light

•Main light

•Add on head light

•Adverse weather light

•Backup light

•Spot lights

•Search head lights

Head light systems

•Two head light system

•Four head light system

•Right-hand / Left-hand driving

Head light systems

•Two head light system

Main light [2] Dimlight [2]

Head light systems

•Four head light system

Single head light [2]

Head light systems

•Right-hand / Left-hand driving

Light radiation characteristics at dim light [2]

Reflector technology

Praboloid–head light

-Reflector technology

-Conventional head light system

-since 1910

Lateral view [2] Top view [2]

1.Reflector

2.Light source

3.Aperture stop

4.Diffusing panel

Reflector technology

Clearance surface reflector

-Reflector system

-Free Reflector surface

-many single surfaces, designed by a PC

-Light efficiency 45 %

-By scattering reflector

-Whole reflector is used

-80 % increase compared with Praboloid

Lateral view[2] Top view[2]

Reflector technology

DE –head light

-Three axis Ellipsoid

-Small construction; high power

-Middle of the 80 markets

-Projection system

-Light efficiency 36 %

-Sharp bride-dark-border

Lateral view[2] Top view[2]

1.Reflector

2.Light source

3.Aperture stop

4. lens

5.End panel

Reflector technology

Super DE –head lights

-Projection system

-Three axis Ellipsoid

-Clearance surface Reflector

-Light efficiency 52 %

-since 1988

Lateral view [2] Top view [2]

1.Reflector

2.Light source

3.Aperture stop

4.Lens

5.End panel

Reflector technology

Luminous flux balance [1]

Reflector technology

Paraboloidhead light [2]

Clearance surface reflector -head light [2]

Reflector technology

DE head light [2]

Super DE head light [2]

Light sources

List commercial Halogen lamps [3]

Light sources

H7 LL = longlife 930 1000

H7 550 630

H4 700 1050

H3 400 990

H1 400 960

Specificlife Tc Realisticlife Tc [h]

(DIN 60810) [h]

Duration of different Halogen Lamps [1]

Light sources

•D2S use in Projection

systems

•D2R use in Reflection

systems

•D1S use in Projection

systems

•D1R use in Reflection

systems

Xenonlamps[3]

Light sources

Increaseof theillumination[1]

Light sources

Left: Xenon-Lampspectum; right: Halogen lampspecrum[1]

Light sources

LED headlights

•First realizationin Audi R8

•vantages:

–Light colorismorelikeday

light

–Extrem large life

–Significantlylower

consumption

–Energie saving

–Loweroperatingtemperature

LED Module [4]

Full LED headlight

Front of theAudi R8 [5]

Daytimerunniglights

•Oftenrealizedbydimlights

relativlyhigh fuelconsumption

100 W Light powerequatesapprox. 0,12 l / 100 km

•LED Systems

(AFS) Adaptive FrontlightingSystem

•Headlampcontrol

•Dynamicbendlighting

•Connectablestaticbendlight

•Connectablestaticbendinglight

AFS Module withBi Xenon headlights[4]

•Town Light

•MotorwayLight

•Adverseweatherlight

AFS headlampcontrol[4]

AFS headlampcontrol[1]