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ABSTRACT

The topic of this project is steering controlled (or directional) headlights, that are usually aseparate set of headlights fitted to road vehicles beside the usual low beam/high beam headli

and their feature is that they turn with the steering, so that the driver of the vehicle can see th bend, what he is actually turning into. These type of headlights appeared on production cars the19 !"s and are still around nowadays, but not very popular, although they ma#e night time drivingsafer. The most famous car which featured these lights was the $itroen %& (19'' 19 '),introduced on the19*+ aris -otor &how. The headlights can be connected to the steeringlin#age by means of rods or cables, operated hydraulically by the power steering ornowadays electronically adjusted, even controlled by satellite navigation system.

ur project is to ma#e new and modern %irectional 0eadlights in efficient manner by‖increasing the light angle. %irectional headlights are those headlights that provide improved

lighting especially for cornering. There are automobiles that have their headlights directlyconnected to the steering mechanism so that its lights will follow the movement of the frontwheels. ur project comprises $am and ollower mechanism, 2ear mechanism and springmechanism. $am and ollower mechanism is used to turn the head lights to right or leftdirection, 2ear mechanism is used to transmit motion and to reduce the no of rotations fromsteering rod to cam shaft. &pring mechanism is used to bring bac# the follower and headlight brac#et to its initial position. 3ccording to our project, when the steering steers to the rigthe light brac#et at right alone steers to right using cam 4 follower mechanism and reductiongears 4 vice versa. 3t the same time the left brac#et remains stand still due to the dwell periothe cam. %uring the return stro#e of cam, the spring mechanism is used to bring the brac#et follower to its initial position. The reduction gears are used to turn the brac#ets to the re5uire

angle respective to the steering rotation. ur project will be useful for vehicles, which are beused in hill areas

INTRODUCTION The present invention relates to headlights of an automobile, more particularly to a directionturning device for headlights of an automobile which enables to turn direction synchronouslywith the rotation of the steering and hence increasing the safety for driving at night or in thedar#ness. 6n the #nown technology of the prior art, a headlight of an automobile has a fi7ed of emission which is aligned with the front direction of the automobile. 3lthough the effects 8high beam8 or 8low beam8 can be achieved by adjusting the angle of elevation of the headlthe direction of emission is not adjustable as to the left or right. hen the road curves or turnthe corner on time when the car turns, thereby creating a dead angle of illumination and suchlac# of visibility poses danger in driving at night or in dar#ness. Therefore, it is highly desirato invent a device to solve this problem and such device is of high utility. 3n object of the present invention is to provide a direction turning device for a headlight of an automobile whrenders to emission direction of a headlight of an automobile in synchroni:ation with steering

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and thus increases the illuminated area upon changes of direction of the automobile when theautomobile ma#es turns. 6n ancient %irectional headlights, when the steering steers to right left direction, then both the right and left headlights will steer to the perspective directions. 6results in altering the optical a7is of the head light to the vehicle speed and the front road sh;ut according to our project, when the steering steers to right then the right side of the headlig

brac#et steers to right side and the left side headlight brac#et remains stationery by cammechanism and it is similar for the other side also. ;ecause of this, the optical a7is of theheadlight is widened and it is useful for the drivers for safety ride

LITERATURE REVIEW The present invention relates to a vehicle front lamp light distribution control system and mo particularly to a vehicle front lamp light distribution control system capable of raising visibil

at the time of cornering by controlling light distribution means of the front lamp. 3ccording t

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HISTORY OF DEVELOPMET

3lthough the concept of headlights that follow the movements of the steering is still considernowadays as being innovative, it is not new. The first vehicles fitted with such systems appeain the 19 !s. ioneers and milestones in the automotive history featuring directional headligh

were the 19 + illys Dnight !3 Touring, the 19>!s $:ech Tatar and the 3merican 19@+Truc#er &edan. These cars were e5uipped with a third central headlight mechanically conneto the steering system. The most famous car featuring directional headlights, was the $itroen(19'' 19 '), introduced on the 19*+ aris -otor &how. This car had both headlights not onlyswiveling with the steering, but they were self leveling as well, responding to inputs from thesuspension. hile it was a purely mechanical system operated by cables, the 19 !$itroen &-used a sealed hydraulic system with a glycerin based fluid. n present day motorcars two typof directional headlight system are in use 3 fi7ed light that only turns on and off based on steering and vehicle speed.

The light is motori:ed by the use of small electric motors and physically swivels according tomovement of the steering wheel and vehicle speed. This modern technology first appeared in!!> on the orsche $ayenne (fi7ed) and the -ercedes E class (motori:ed). &oon other

manufacturers followed them such as the ;ewitch the adaptive headlights and cornering lightand nowadays most of the main brands use such systems on their vehiclesli#e 3cura, 3udi, ;- , $adillac, ord, 6nfiniti,

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movement of the follower. 3t the same time, the cam at the other end remains in thedwell period, which results in the stand still position of the light brac#et. The light brac#et wreturns bac# to its original position, using the spring mechanism attached to it. hen the vehiturns to left, the left brac#et alone turns to the left leaving the right light brac#et in standstill position.

DESIGN CALCULATIONS1. Des, - "a)"u)a$,!- (!r "3a,- 6r,7e&peed of rotation, =1J 1!!! rpm&peed of rotation, = J '! rpm$entre distance, a J +!! mm2ear ratio, i J =1/= J @6 std J @Teethes, :1J !Teethes, : J i K :1 J +! teeth$hain pitch, a J (>!L '!) pa J >!p JM pJ *.* mm Jp ma7

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a J '!p JM pJ 1* mm Jp min &tandard pitch, p std J '.@ mm&o the chain selected is 1*31 F+! M simple7?ength of chain, lpJ apN (:1N: )/ N((: :1)/ ) /ap apJ ao/p J +!!/ '.@ J >1.@9

6p J ( K>1.@9)N'!N(*!/ K>.1@) />1.@9J 11'.+J 11* lin#s3ctual length J no. of lin#s K pitchJ 9@*.* mm;earing area J 1. 9 mm$entre distance, a J ((eNO(e +m))/@)pe J 6p L (:1N: )/J **mJ ((: :1)/( K>.1@)) J 91.1+

a J **NO(((** L (+K91.1+))/@)pJ +!1.' mm

Des, - "a)"u)a$,!- (!r "3a,- 6r,7e &peed of rotation, =1 J 1!!! rpm&peed of rotation, = J '! rpm$entre distance, a J 1 !! mm2ear ratio, i J =1/= J @istdJ @Teethes, :1J !Teethes, : J i K :1 J +! teethes$hain pitch, a J (>! L '!)pa J >!p JM pJ @! mm Jp ma7 a J '!p JM pJ @ mm Jp min &tandard pitch, pstdJ '.@ mm&o the chain selected is 1*31 F+! M simple7?ength of chain, 6pJ apN (:1N: )/ N((: :1)/ ) /ap apJ ao/p J 1 !!/ '.@ J @ . @ 6pJ ( K@ . @)N'!N(*!/ K>.1@) /@ . @J 1@@.@9J 1@* lin#s3ctual length J no. of lin#s K pitchJ > !+.@ mm;earing area J 1. 9 mm$entre distance, a J ((eNO(e +m))/@)pe J 6pL (:1N: )/ J 9*m J ((: :1)/( K>.1@)) J 91.1+

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a J 9*NO(((9* L (+K91.1+))/@)p J 119@.' mm

R!$a$,!- re6u"$,!- ra$,!s &teering rotation J !!3ngle of cam to be tilted J 9!!

&o value of angle to be reduced is in ratio +H1The reduction between the sproc#ets is made as @H1&o the diameter 4 teeth of the larger sproc#et should be four times that of the smaller %iameter, d1J @! mmTeethes, :1J !%iameter, d J 1*! mmTeethes, :1J +!

Des, - "a)"u)a$,!- (!r spur ears&peed of rotation, =1 J 1!!! rpm&peed of rotation, = J '!! rpm

2ear ratio, i J =1/= J 3ssuming the same material for pinion and gear 1*=i 1 $r+!?ife of gear J !,!!! hours =umber of cycles J !,!!!K*!K=1 J !,!!!K*!K1!!!J 1. K1!9$ycles Poung"s modulus, E J .1'K1! * #gf/cm J .1'K1!' =/mm%esign contact stress, QRcS J $F K 0F$KDcl $F J >1!, 0F$ J *!, DclJ 1 from psg tech data boo# pg.=o.+.1 UQRcS J 1+.* K 1! =/mm%esign bending stress, QRbS J ((1.@KDblKR 1)/(nKD R)) = J , D RJ 1. , D blJ 1R 1J !. 'RuN 1 !!RuJ 1!!! =/mmR 1J @ !!! =/cmQRbS J @.1* =/mm #.# dJ 1.>#oJ 1.'(medium shoc#)Teethes, :1J !Teethes, : J iK:1J @!

Des, - "a)"u)a$,!- (!r spr!"#e$s0ere the rotation reduction ratio is @H1&o the diameter 4 teeth of larger sproc#et should be times that of the smaller.%iameter, d1 J @! mm Qreadily available in mar#etSTeethes, :1 J !%iameter, d J 1*! mmTeethes, : J +!

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e have searched the library of the college for relevant boo#s and the internet for additionalinformation. %uring the build of an e7perimental model of directional headlight son a vehiclhave improved our %6P s#ills and technical problem solving ability .$arrying out test with th project vehicle has proved that this concept wor#s and although such lights are not widely useven nowadays, it does support the driver"s vision during night time driving, helps to reduc

blac# spots while cornering and therefore reduces the ris# of accidents, by helping to notice persoobjects hidden in a bend earlier in advance. e are loo#ing forward to see more road vehicles e5uipwith directional headlights in serial production.