DUAL CLUTCH TRANSMISSION M.ARUNA
D.MADHUSREE
06741A0304
06741A0324 aruna
[email protected] aruna
[email protected] 91!94909"2320
DE#AR$ DE#AR$MEN$ MEN$ %& ME'HAN('A) EN*(NEER(N* EN*(NEER( N* (N$E) EN*(NEER(N* '%))E*E
ANAN$A#UR.
ABSTRACT (n +he ,e-eo/men+ o au+omoe +ranmon y+em occu/y a -ery m/or+an+ /o+on. $o e+ +he ecen+ +ranmon y+em 5+h moo+h runnn +he /reen+ ,ay au+omoe n,u+re are un a ne5 +echnooy or /o5er +ranmon 5hch came n +o h+ recen+y. $h /a/er many ocue on +he +ranmon y+em o an au+omoe an, ,ea+ 5+h +he mo,ca+on ma,e +o e+n +ranmon y+em or re,ucn +he 8ery mo+on an, +o ncreae +he ecency o +he -ehce y un +he ne5 +echnooy cae,
“Dual Clutch
Transmission :DCT;<
$h /a/er euc,a+e +he conce/+ o D'$ an, +he mechanm ehn, +he D'$. $he ,a,-an+ae n +he au+oma+c +ranmon manua +ranmon an, a cear cu+ o +he a//ca+on an, a,-an+ae o D'$ are ,cue, here. $he /a/er em/ha=e on +he +remen,ou m/ac+ +ha+ D'$ 5 ha-e n +he near u+ure.
INTRODUCTION
A e5 year ao no e!re/ec+n ,r-er 5ou, e+ ec+e, aou+ 5ha+ +y/e o earo 5a ++e, +o h car. >u+ no5 +hn ha-e chane,. Due +o +he aru/+ chane n +he au+omoe +echnooy +he +echncay ,e-eo/n coun+re e (n,a are many ocue, on +he ne5
+echnooe e ?Dua cu+ch +ranmonu+ +here are Mechanca m+a+on an, Au+oma+e, manua +ranmon ha-e een cr+c=e, or o+h h+n +oo o5y an, Ino,,n hea,I eec+ +hey m/ar+ ,urn ear chane. (n rea+y +hey are ne or ma ue!ecen+ c+y car u+ or a u+ +he mo+ eo+c /or+ a//ca+on!!+her ,ay are numere,. So+5are an, ac+ua+or are ao ,e-eo/e, +ha+ can con+ro a -are+y o /o5er +ran ncu,n eec+rc hy,rauc an, /neuma+c y+em a 5e a con-en+ona n+erna comu+on enne an, +ranmon. A u!au+hor+y -ehce con+roer +ha+ ncu,e an AM$ an, cu+ch y+em 5+h o+5are +ha+ au+oma+cay h+ ear 5hen enne an, roa, con,+on 5arran+.
$he h+n +ran/aren+ +o +he ,r-er much a one 5ou, e/erence 5+h an au+oma+c +ranmon. >ecaue +he y+emI har,5are ae, on a manua +ranmon ho5e-er AM$!eBu//e, -ehce ache-e m/ro-e, acceera+on ue economy an, emon n com/aron +o +hoe eBu//e, 5+h con-en+ona au+oma+c +ranmon. $he ,en emna+e +he au+oma+cI +orBue con-er+er +ranmon u, /um/ an, mu+/e cu+che re,ucn +ranmon 5eh+ y a//roma+ey one!+hr,. $he AM$ ao e e/en-e +o u, +han +he au+oma+c +ranmon +ha+ ,omna+e +he Amercan mare+. $he conura+on or an AM$ are Bu+e -are,. Some ha-e cu+ch /e,a an, ome ha-e h+ e-er 5he ome ha-e ne+her an, o+her ha-e comna+on o +hee. Ho5e-er e-en 5+h a +hee /oe ,er-a+-e +here are on y +hree ac AM$ +y/e •
Sne!,e, cu+ch :SS'$;
•
Doue!,e, cu+ch :DS'$;
•
Dua cu+ch +ranmon. :D'$;
SINGLE SIDED CLUTCH TRANSMISSION (SSCT) $he SS'$ ue a curren+ /ro,uc+on manua +ranmon u+ ncor/ora+e ac+ua+or +o au+oma+cay o/era+e +he cu+ch an, ear h+n unc+on. $h +y/e o AM$ y ar +he mo+ co+!eec+-e ecaue + ae +o ue a con-en+ona +ranmon 5+hou+ mo,ca+on +o +he e+n ear an, ha+. $he /o5er n+erru/+on hor+er +han n a con-en+ona manua +ranmon ecaue +he AM$ enae,enae +he cu+ch an, mo-e +he h+ e-er a+er +han a human can an, ao /re!+ae +he ynchron=er n a,-ance o +he u/comn h+. Moreo-er + /recey a,8u+ +he enne /ee, ! aan a+er +han a human can ! +o ache-e near! ynchronou h+n. Ho5e-er n +ua+on 5here +he /o5er n+erru/+ n+er-a mu+ e re,uce, e-en ur+her y ,oue!,e, cu+ch +ranmon :DS'$;
DOULE SIDED CLUTCH TRANSMISSION (DSCT) $he h+ Bua+y +ha+ ,er-e, rom a ,oue!,e, cu+ch u/eror +o +ha+ o a ne! ,e, cu+ch ecaue +he +o+a cu+ch +ra-e +me ,rama+cay re,uce,. (n ,eman,n a//ca+on 5here e-en e++er h+ Bua+y reBure, +he con+nuou /o5er +raner charac+er+c o a ,ua cu+ch +ranmon :D'$; conura+on reBure,. &ure 1 ho5 +he
mechanm o DS'$
%$!i"ur#
DUA) ')U$'H $RANSM(SS(%N :D'$; $he o+her name or D'$ D%U>)E SH(&$ *EAR >%C. $he man ,ea +o hare +he earo e+5een +5o cu+che. $he D'$ u++u+e ,oue cu+che or +he curren+ /ro,uc+on ne! ,e, cu+ch +o ao5 /o5er rom +he enne +o e +ranerre, n /arae +hrouh +5o /o5er /a+h. $he houn con+ann o+h cu+che 5ou, e connec+e, +hrouh a concen+rc ha+ y+em +o +5o e+ o ear one e+ en +he o,, ear :1+ 3r, F+h;
Figure.2 an, +he o+her +he e-en ear :2n,
4+h
6+h;.
Synchron=er moun+e, on +he n/u+ ha+ 5ou, han,e mar oa, ao5n +he ou+/u+
ha+
+o
reman
mar n con+ruc+on +o +o,ayI con-en+ona +5o! ha+ manua +ranmon.
Figure.3
(n D'$ +he +orBue o5 o +he 5hee no+ n+erru/+e, ,urn +he ear chane an, +he ear eec+on nenou. (n a +he mo,ern earoe ear +ee+h are cu+ a+ an ane +o re,uce noce an, +h crea+e +he aa +hru+ aon +he cen+re ne o +he ear +ryn +o orce +hem +o ,e a5ay rom each o+her. Accor,n +o An+ono- /rnc/e +h orce 5a aance, y cen+rua orce n +he ro+a+n com/onen+ +o o/en an, coe cu+che an, +ranm+ +he ,r-e +hrouh ,eren+ e+ o ra+o. &ure.3 ho5 +he 5orn o +he An+ono-J /rnc/e. )h+5eh+ +he ma8or ea+ure o a +he ne5 +ranmon ,e/+e +he e+ra ear ra+o.
MECHANISM O! DUAL CLUTCH TRANSMISSION COM&ARISION ET'EEN THREE AMTS
SSCT
DSCT
DCT
(+ ho5 /oor /erormance amon +he #eror remann mance +ranmon ,ue +o /o5er n+erru/+on.
(+ +he mo,e, SS'$. Here +he /o5er n+erru/+on ,ecreae, y a are e+en+
In this regard, the DCT rates highest among the three systems because it maintains continuous power during the shift.
$he co+ 5eh+ ame a +he 'o+5 DS'$ eh+/ aca n
$he DS'$ no+ o e/en-e ecaue +he + ,oe no+ reBure more man+enanceG +he y+em no+ o com/ca+e,.
The DCT is more expensive than the DSCT because it is more complex, has a greater number of parts and requires a longer transmission housing. The same factors also mae the DCT dramatically heavier than the DSCT.
&ue conum/+on Kehc more ,ue +o e ue /o5er conu n+erru/+on. m/+on
&ue conum/+on The DCT!s lac of power interrupt also ,ecreae, an, contributes to improved fuel ome oe e+ consumption relative to the DSCT, but ,urn +he there may be some additional energy +ranmon o loss within the DCT transmission +he ear. during the clutching event as one
clutch disengages and the other engages. "ecause these clutches are modulated to provide a smooth transition, there would have to be
some high#torque slippage of the clutches, resulting in some energy loss.
ADVANTAGES OF DCT •
(+ h+enn a+ an, mo+ m/or+an+y or moo+hne an, ecency.
•
$here no n+erru/+on o +orBue rom +he enne +o +he 5hee.
•
Ra+o are 5,er /rea, +han a F!/ee, o/+m=a+n o+h acceera+on an, ue
conum/+on. •
(+ ao 1Fmm hor+er an, 14 h+er +han a F!/ee, eBu-aen+ an, ha a ne5 +y/e o
+orBue con-er+er 5hch ,connec+ com/e+ey a+ ,e ra+her +han Lcree/nJ +o ur+her re,uce conum/+on.
DISADVANTAGES •
Due +o +he hea-y mu+/e rc+one/ara+or /a+e oner cu+ch /a+e houn oner
n/u+ ha+n an a,,+ona /+on an, a,,+ona u, reBure, or cu+ch ac+ua+on an, coon a con+ru+e +o +he 5eh+ /ena+y. $he D'$ con+an +5o cu+ch aeme each com/rn a are numer o rc+on /a+e an, e/ara+or /a+e. 'oneBuen+y +he cu+ch houn an, ha+ an, +her n+era /ne are oner an, more ,cu+ +o arca+e. >o+h y+em u+=e a /um/ an, con+ro -a-e +o ac+ua+e +he cu+che. Ho5e-er +he amoun+ o u, reBure, +o o/era+e an, coo +he D'$ ,rama+cay rea+er. FUTURE SCOPE AND CONCLUSIONS •
No5 +he Merce,e!>en= a++em/+n +o o one e++er 5+h +he r+ e-en /ee,
au+oma+c /aener car +ranmon +he 7*!$ronc re,uce +he ue conum/+on y aou+ F an, ao m/ro-n acceera+on marnay. (+ 5 e em/oye, n ne5 S)!F00. •
>y 200" e-era o+her cu+omer eyon, K ao 5 ue +he ,ua!cu+ch +echnooy.
Ko5aen A* ha een >orarnerI ,e-eo/men+ /ar+ner or D'$ 5hch a//ear on K Au, So,a an, SEA$!ran, -ehce. K reer +o +he +ranmon a DS* :,rec+!h+ earo;.
REFERENCES • • •
AU$%'AR (ND(A :maa=ne;. Summer 2004 $echnooy $o,ay!!!S5R( /uca+on. Au+omoe +echnooy!!!Dr.N..*r.
