Post on 20-Feb-2018
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Mechanical locking _Limited slip diferential
12/1/15
Prepared by Amit
Gosavi
Chevrolet Colorado _G80
Prepared by Amit Gosavi 1
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12/1/15
Mechanical locking Limited slipdiferential
Assembly _ Mechanical lockin !"#
$evel ear _ Constr%ction & 'orkin
Cl%tch "%b(assly _ Constr%ction &'orkin
)naement mechanism _ Const* &'orkin
Cam plate
act%ation+or,%e trans-er
.ih speedcondition
Advantaes &
#isadvantaes
1*
*
2*
*
*
5*
8*
*
Prepared by Amit Gosavi 2
Per-ormance comparison video
3*
Contains
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Comparison 'ith other vehicle
1 2 5
S.No.
Make Transmission
B. Ratio,Diferential
Engine
Price
14 5 ChevroletColorado
4 2 M* lockin ( !"# *5 !7#
9143 (92843
2 :ord ;aner *104 !"# *0 !
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AB $
C
Assembly _ Mechanical lockin !"#
Chevrolet Colorado _G80
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$evel ear set?("imilar to the conventionalopen di@erential there aret'o di@erential earslocated on cross sha-t &t'o side ears splined tothe ale sha-t*
+hese ears are precision-ored -or hih impact
strenth* Prepared by Amit Gosavi12/1/15
$evel ear _ Constr%ction & 'orkin
A
#i@ case
7Planet carrier
#i@erential Pinion
7Planet ear
"ide ear7"%n ear
$evel ear set 'ork onprinciple o-
planetary ear train*
5
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ne o- the side ear hascamramp machined onback -ace* +hese rampsprovides correspondinramp on cam plate*
Also there are three pin likedetents on cam plate &havin three hole on theback -ace o- the ear*
+hese detents avoidsrampin o- cam plate tillthe predetermined tor,%eis applied to the ear o-
cam plate*
Cl%tch "%bassembly _ Constr%ction
$
cam
ramp
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1
2
#etents 7pins
#etent .ole
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leo- ramp helps to have aial movement o- cam plate in only onedirection*
1* Cam ramp enaes'ith the ramp s%r-aceo- the ear*
2* le o-the side ear*
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1* Cl%tch assembly?($ehind the cam platethere is a pack o- m%ltiple-riction discs 'hich arealternately splined 'ithdi@erential case & side
ears*
2* "imilar set o- disc packis provided on anotherside ear*
Cl%tch "%bassembly _ Constr%ction$
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1
2
8
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Co%nter
'eiht
!ockin
pa'l
otch
)naement mechanism _ Constr%ctionC
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1
2
!ay sha-t
3
!ay sha-t
Main
sha-t
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)naement mechanism _ BorkinC
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Main sha-t ;PM D 100
C! Main sha-t
Main sha-t ;PM 7CCB E 100Main sha-t ;PM 7CB E 100
.*P*
C! Main sha-t
.*P*.*P*
1 2
Main sha-t assly is 'orkin on principle o- centri-%al overnor*
Main sha-t ;PM D 100 ?( Centri-%al -orce on the 'eiht is balancedby torsion sprin
Main sha-t ;PM E 100 ?( Centri-%al -orce eceeds sprin -orce & thebalance 'eihts ets moves a'ay -rom each other it ets arrested bylockin pa'l*
+he lockin action is possible in clock 'ise as 'ell as co%nterclock'ise direction o- rotation o- the main sha-t*
10
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)naement mechanism _ Cam plate act%ationC
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1 2
1* !ockin action stops the rotation o- main sha-t*2* ;PM o- the cl%tch plate ets arrested by main sha-t** $%t at the same time the side ear is rotatin 'ith the spinnin 'heel4
hence +he relative movement bet'een side ear & cl%tch plate** ;elative movement ca%ses rampin action o- the cl%tch plate over the
side ears ramp*5* ;ampin action develops aial -orce on the cl%tch plates** Aial -orce develops -rictional tor,%e on -riction plates4 hence lockin
o- lo' traction side ear 'ith di@erential ho%sin*
11
:riction plates
Cam plate
)* mechanism
"ide ear
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Prepared by Amit Gosavi12/1/15
$e-ore lockin1 2 A-ter lockin
Mechanical lockin !"# _ +or,%e trans-er
a* "%n ear ?( .ih traction side ear 70 rpm
b* Planet ear ?( #i@erential ear acts asplanetary ear
c* Ann%l%s ear ?( !o' traction side ear7"pinnin
d* Planet carrier ?( #i@ case 7;eceives inp%ttor,%e
ab
c d
1
2 !ockin o- Ann%l%s ear 7c 'ith Planet carrier7b s%pplies entire driveline tor,%e to "%n ear
7a 12
;eactionblock
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Bhen the vehicle is travelin
over 20mph the co%nter'eiht rotates alon lay sha-tais %nder inF%ence o-centri-%al -orce*
As co%nter 'eiht is interalpart o- lockin pa'l 4 lockinpa'l moves a'ay -rom loc%so- lock notch*
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12/1/15 Prepared by Amit Gosavi
Advantaes?(1* A%tomatic lockin & s%pplies e,%al tor,%e to both 'heel only at
lo' speed o- vehicle*2* +he #i@erential G*$* can be desined 'ith hihest bias ratio as it
is not oin to lock at hih speed** )ven 2 vehicle 'ith this di@erential develops reater traction i-
compared 'ith 'ith simple !"#*
Mechanical lockin !"# _ Advantaes & #isadvantaes
#isadvantaes?(Cost4 %mber o- movin parts hence maintenance cost little bithiher*
M!(!"#
1
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+hank o%H
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