Upload
malik-rules
View
332
Download
5
Embed Size (px)
DESCRIPTION
torque converter and its working principles
Citation preview
1
GP COMD IP
TORQUE CONVERTER
I RODUCT I O N TN
In 1910 George Constantinesco invented torque
converter
He was a british auto mech engr
5
AIM
To acquaint the student offrs with
the mech, working and latest trends
of a torque converter
6
SEQ
Stage – I Def of terms Objs Loc Principles of Fluid
Stage – II Parts Op phases Actions
Stage – III Advs and Disadvs of Torque Converter
Stage – IV Latest Trends Defects Care and Maint
Concl
7
STAGE - I
8
DEF OF TERMS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
o Hydrodynamic
It is a branch of theoretical Fluid dynamics
which deals with flow of an ideal fluid. A device
using fluid as principle of its func is called
hydrodynamic device
o Fluid Coupling
A fluid coupling is a hydrodynamic device used
to transmit rotating mech power. It has been
used in auto tx as an altn to a mech clutch
o Torque Converter
A device which tfrs the torque of the engine to
the tx gradually, using a fluid. A torque
converter is a modified form of a fluid coupling,
and unlike fluid coupling , is able to multiply
torque
9
OBJS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
To multiply the engine torque at low RPM
To lock up at high speed
To inc and dec the engine torque according to
speed
10
LOC
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Loc b/w engine and tx
Torque converter
TxEngine
Rotary motion
Vortex flow
Non- Compressibility
Equal Distr of Pressure
PRINCIPLES OF LIQUIDS
12STAGE 1 STAGE 2 STAGE 3 STAGE 4
12
STAGE - II
13
PARTS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Turbine
Casing
Pump
Stator
15
OP PHASES
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Stall
Acceleration
Coupling
16
ACTIONS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Drive
Action TURBINE
STATOR
PUMP
ENGINE
17
ACTIONS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Torque Multiplication
Action Pump
Turbine
1ST Multipication
2nd Multipication
3rd Multipication
18
ACTIONS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Torque Multiplication
Action Torque converterActions
Pump Stator Turbine
1st torque multiplication
Oil leaves the outer vanes of the pump
- Hits the turbine giving it a push
2nd torque multiplication - -
Pushing the turbine and tending it to mov in the same dir of pump
3rd torque multiplication
Oil after leaving the stator enters the pump give it a further push
Oil enters pri stator and then sec stator
Oil leaves the inner vanes of the turbine
19
ACTIONS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Lock up
Action
21
STAGE – III
22
ADVS AND DISADVS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Advs
o It needs no linkages
o It engages power train smoothly
oActs as a safety device
oReduces vibration
oReq less maint
Disadvs
o It can cause heating up of engine at low speed
oMore fuel consumption
23
STAGE - IV
24
LATEST TRENDS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
25
LATEST TRENDS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Variable Pitch Stator
o In most cases the stator blades are ‘fixed’ at a predetermined angle
o In special designs of modern vehs variable pitch stator assy is used. For normal op in drive range, the stator blades are auto set at a low angle
o For inc acceleration greater torque is obtained by setting stator blades at high angle
Multiple Sec Members
o These torque converters have more sec members
o For example, five unit torque converter with pump, turbine, stator, lockup clutch and sec pump
o Purpose is to avoid slippage at high speeds
26
DEFECTS
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Overheating - Caused due to low lvl
of oil
Slippage - Caused due to
overheated oil
Shudder - Symptom of
overheating oil
27
CARE AND MAINT
STAGE 1 STAGE 2 STAGE 3 STAGE 4
Use correct grade of oil
Oil lvl should be checked frequently
Never park veh in gear
CONCL
Q & A
THANK YOU