Mercedes a-B-Class CVT Transmission-1
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Transcript of Mercedes a-B-Class CVT Transmission-1
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Information partly provided by EuroMatic
Mercedes A, B-ClassCVT transmission
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Cut away view
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Cut away view
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Primary pulley
Torque converter Pushbelt
Sectional view
Forward clutch
Reverse clutch
Final reduction ear
!ifferential
Secondary pulley
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Forward and reverse clutch
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"alve body
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"alve body
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"alve body #
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"alve body
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Crac$ in valve body
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Crac$ in valve body
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BMW-MINI Cooper CVT transmission
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Sectional view
Primary pulley
%ilpump
Forward clutch
Reverse clutch
"alve body
Planetary earset
Final reductionears and differential
Pushbelt
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2000
3000
4000
5000
000
T a r ! e t e n ! i n e
s p e e d
Tar!et en!ine speed
"o#
$%erdri%e
Vario!ram
!rive off full throttle
throttle &
'ever position &
Enine speed &
I variator &
"ehicle speed &
()) *
!rive
+)))
low
)
0 20 40 0 &0 100 120 140 10 1&0 200
0
Ve'icle speed ()m*'+
,,))
top
(-)
,)))
medium
(+)
.)))
low
/0
0)))
low
+.
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2000
3000
4000
5000
000
T a r ! e t e n ! i n e
s p e e d
Tar!et en!ine speed
"o#
$%erdri%e
(
+0 . , /
Vario!ram
Chanin from ! to step mode
throttle &
'ever position &
Enine speed &
I variator &
"ehicle speed &
.) *
!
++))
%verdrive
()) $m1h
0 20 40 0 &0 100 120 140 10 1&0 200
0
Ve'icle speed ()m*'+
.) *
Step
0())
/th ear
()) $m1h
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2000
3000
4000
5000
000
T a r ! e t e n ! i n e
s p e e d
Tar!et en!ine speed
"o#
$%erdri%e
(
+
0 . , /
Vario!ram
0 20 40 0 &0 100 120 140 10 1&0 200
0
Ve'icle speed ()m*'+
!own shiftin
throttle &
'ever position &
Enine speed &
I variator &
"ehicle speed &
.) *
Step mode
++)) rpm
/
-) $m1h
.-))
0
-) $m1h
02))
.
-) $m1h
0)))
,
-) $m1h
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2000
3000
4000
5000
000
T a r ! e t e n ! i n e
s p e e d
Tar!et en!ine speed
"o#
$%erdri%e
(
+
0 . , /
Vario!ram
0 20 40 0 &0 100 120 140 10 1&0 200
0
Ve'icle speed ()m*'+
3ic$ down mode
throttle &
'ever position &
Enine speed &
I variator &
"ehicle speed &
$d
Step
++))
,
/)
$d
Step
.-))
,
(0)
$d
Step
.,))
.
4-
$d
Step
.+))
0
2)
$d
Step
,+))
+
/)
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5daption C"TC"T adaption 6M7 Mini&5fter repair or replacement of valve body8 adaption
of the C"T is hihly recommended96efore adaption run8 the adaption should be
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5daption :Clutch=For the followin steps t'e ra)e should be used9
(9 Start with cold enine9 7ith an increasedstationary rpm shift in P durin () seconds anddurin () seconds in !9 The display shows .
in P position9+9 Repeat the followin steps () times9
a9 Shift in N for 0 seconds
b9 Shift in / for 0 secondsThe display shows . in P position9
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5daption :Clutch=
09 Repeat the followin steps () times9a9 Shift in N for 0 seconds
b9 Shift in for 0 seconds
c9 The display shows . in P position
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5daption :Ratio=(9 'et the car accelerate to &5 )m*'9 Release
the throttle pedal and let the car rol out to astop9 The transmission will adapt from .,))8.)))8 >98 (,)) and (.)) rpm9 The display
shows . in P position9+9 The enine is now on wor$in temperature9
The stationary rpm is -))1min9 epeat step 2
and 3 rom t'e cltc' adaption09 Turn the car$ey in position )9
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5daption C"TATTNTI$N
7ait for at least () minutes before
sconnec n e a ery9The battery should be disconnected forminimum 2 mintes?
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Problems@ Aard shift B
@ Eratic shift between -) (() $ph9@ Bo upshift
@ Bo downshift
This $ind of problems could be also solvedby adaption9
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Secondary pressure
Plus
Clutch pressure
P
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Pressures
Clutch pressure at stall& 2- -, psi 1 ,8, /8) bar +)))
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Plus
%il level control plu
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Connector plu6tepper motor Resistance&
6etween pin 5 and 6 # D+08, 6etween pin C and ! # D+08,
Resistance&6etween pin ( and + # (8-
6econdar7 pressre solenoid
Resistance&6etween pin 0 and . # 08,
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"alve body
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"alve body
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"alve body
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"alve body
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"alve body
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8onda Ci%icCVT transmission
Pushbelt Primary pulley
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y p y
Reverse clutch
Planetary earset
Forward clutch
%ilpump
Torsional damper
Inputshaft
Secondary pulley
!ifferential
!rivin ear
Par$in ear
Ta$e off clutch
6ectional %ie#
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Cause of clutch udder
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Adi MltitronicA4*A and A5
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5udi Multitronic@ Introduction
@ Gearbo;modules
@ Gearbo; control@ +nd eneration
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MH'TI
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Introduction
Adi Mltitronic9@ C"T@ Pull chain
@ Can be used incombination with +9-
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Introduction& Multitronic and ,
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Introduction& The earbo; concept
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Introduction& Specifications
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Gearbo; modules
Gearbo; modules& Sectional view
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Gearbo; modules& Sectional view
%il pump andtransfer case areshown folded9
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Common failures
@ Forward clutch judder
@ Slip of chain
@ Instabilit of en ine s eed at 50 – 70 h
@ !o dri"e at all@ #wo$mass dri"e damper
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Gearbo; modules& The flywheel damper unit
.
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
G b d l F d l t h1 l t h d l t t
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
Gearbo; modules& Forward clutch modiication
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Gearbo; modules& Forward clutch modiication
Modiication or#ard cltc'9
From / to 2 plates End clearance& (8/ to (8- mm Part number& )(J 04- 4.. :2 frictions=
Pressure plates :shims=& (8- +8(, +8/, +8-, 08(, Part number& )(J 04- +.(
G b d l F d l t h1 l t h d l t t
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
Gearbo; modules& Forward clutch1reverse clutch and planet ear set
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
Gearbo; modules& Pump a;le
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Gearbo; modules& Forward clutch1reverse clutch and planet ear set
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Gea bo odu es o a d c u c 1 e e se c u c a d p a e ea se
Gearbo; modules& Clutch control1
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Gearbo; modules& Clutch control1
Gearbo; modules& Clutch control
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B+(, # pressure reulatin valve"ST" # pilot pressure value3S" # clutch control valveSI" # safety valveAS # manual selector valve
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Gearbo; modules&Clutch control
B+(, # pressure reulatin valveB-- # solenoid valve ("ST" # pilot pressure value3S" # clutch control valveSI" # safety valveAS # manual selector valve
Gearbo; modules& Clutch control
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Gearbo; modules& Clutch control
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Gearbo; modules& Clutch coolin system
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Gearbo; modules& Clutch coolin system
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Gearbo; modules& Clutch coolin system
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Gearbo; modules& 5u;iliary reduction ear step
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Gearbo; modules& "ariator
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Gearbo; modules&
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"ariator
Gearbo; modules& Transmission control
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Gearbo; modules& Transmission control
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B+(/ # Pressure reulatin valve
"ST" # Pilot pressure valve" # reduction valve
Gearbo; modules&
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Torque sensor
Gearbo; modules&Torque sensor
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q
Gearbo; modules& Grooved earin :Torque sensor=
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Gearbo; modules& Grooved earin :Torque sensor=
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Gearbo; modules& Chain
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Gearbo; modules& Chain
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Bew chain
!amaed chain
Gearbo; modules& Chain :new and damaed=
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Bew chain
!amaed chain
Gearbo; modules& Chain :new and damaed=
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Bew chain
!amaed chain
Gearbo; modules& Chain removal
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To release the nut8turn cloc$wise
Gearbo; modules& Chain removal
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Gearbo; modules& Chain removal
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Gearbo; modules& Chain removal
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Gearbo; modules& %il supply
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Gearbo; modules& %il pump
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Gearbo; modules& Suction et pump :entrainment pump=
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Gearbo; modules& Suction et pump :entrainment pump=
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Part number& )(J
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Gearbo; modules& Electrohydraulic control :oil pump=
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Gearbo; modules&Aydraulic control unit
Gearbo; modules&Aydraulic control unit
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Gearbo; modules&Aydraulic control unit
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B-- # solenoid valve ( :Clutch coolin1safety valve=B+(, # pressure reulatin valve (:actuates clutch control valve=B+(/ # pressure reulatin valve +:actuates reduction valve "=
Gearbo; modules& Aydraulic control unit
Piston
%il inection
hole for splashil Piston rins
Screw insert for
pulley no (
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PistonRins
hole for splashoil cover Piston rins pulley no9 (
Screw insert forpulley no9 +
Gearbo; modules& Selector shaft and par$in loc$
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Gearbo; modules& Gearbo; housin1 ductin and sealin systems
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Gearbo; modules& 5TF coolin
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Renew allways after repair ???
:earo; control& Multitronic control unit J+(2
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Gearbo; control
1n!ine Tor
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4 Cltc' .rotection
5 Cltc' 6tats
:ear le%er position
= oad 6peed
& Crrent :ear
> Tar!et :ear
10 $n-Board /ia!nostics
3 n!ine Tor
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Multitronic +nd eneration
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Multitronic +nd eneration& !ifferences with (st eneration
+ d ti
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+nd eneration5udi 5,
(st eneration5udi 5.15/
Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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Multitronic +nd eneration
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7ith than$s to Eur