it's ppt about recent trend in automobile, which say what is need of automobile & what is inciude in automibile transmission .

1. INSTITUTE NAME :
EMAIL ADDRESS : dhumalannasaheb@gmail.com
 PRESENTS BY…
 DHUMAL A.S.
 THAKUR R.R.
 JAGTAP R. A.
 GANGAWANE

2. Definition Of Transmission System :-
 The mechanism that transmits the power
developed by the engine of automobile to the
engine to the driving wheels is called
theTRANSMISSION SYSTEM (or POWER TRAIN) .

3. Power Transmission Systems are divided in
three major blocks:
 CLUTCH
 GEAR BOX
 DIFFERENTIAL
Each of them has a specific role transmitting power from the
engine to the wheels ensuring correct rotation speed and
torque.

4.  Clutch is basically a system that many systems use, to
connect and disconnect one (sub-)system that produce
torque to other (sub-)system that will use that torque
to produce work;
 Besides this the clutch provides a smooth start of the
car.
 To do this we need a connection (on/off) between the
engine and the gearbox.

5.  In automotive-systems we need a clutch because they
have a engine that spins all the time (when it is on),
but the car are not always in movement. When we
need our car start there movement, when we need to
push a more height that the usually (in manual
transmission),when we need to stop the car… just with
motor, gearbox and differential there were not
possible.
DUAL CLUCH

6.  Now a days customers have without clutch cars means
automation car so company make a without clutch car
means automation car , so do not come recent new
model of clutch .

7.  Cars need a transmission (gearbox) because the
engines binary itself isn’t capable of create different
relations of velocity and binary. The engine has a
rotation limit (redline) that cannot be passed for the
good of the engine.
 So, we need to create a way of using the available
rotation of the engine, creating different relationships
between engine and the wheels.

8.  There are 4 big types of transmissions:
 Manual Gear box
 Dual-clutch transmission (DCT)
 Continuous Variable transmission (CVT)
 Automatic transmission

9. 
 Automatic transmission was invented in order to transfer the need of
shifting gears from the driver to the car, allowing an easy and more
fluid driving experience to all passengers, as well as the same objective
of all the other types of transmission: convert the narrow range of
engine speeds into a wide range to the output.
 Therefore, if the car would need to shift gear it should be able to press
the clutch pedal autonomously first. Well, that’s not like that...
Automatic transmission cars doesn’t have clutch at all.

10.  Automatic transmission system is the most advanced system in
which drives mechanical efforts are reduced very much and
different speeds are obtained automatically. This system is
generally also called hydromantic transmission. It contain
epicyclic gear arrangement, fluid coupling and torque converter.
In this planetary gears sets are placed in series to provide
transmission.This type of transmission are used by Skoda ,Toyota
, Lexus , etc .
 Epicyclic gearing (planetry gearing) :- It is a gear system
consisting of one or more outer gears, or planet gears, revolving
about a central gear .By using epicyclic gear , different torque
speed ratio can be obtained . It also compact the size of gear box.

11.  Park(P) :- selecting the park mode will lock the
transmission, thus restricting the vehicle from
moving.
 Reverse( R) :- selecting the reverse mode puts the car
into reverse gear, allowing the vehicle to move
backward.
 Neutral (N) :- selecting neutral mode disconnects the
transmission from the wheel.
 Low (L) :- selecting the low mode will allow you to
lower the speed to move on hilly and middy areas.
 Drive (D) :- selecting drive mode allows the vehicle to
move and accelerate through a range of gears.

12. Manual transmission Automatic transmission
Vehicles with manual transmission
are usually cheaper .
Vehicles with automatic
transmission are costlier than those
of manual transmission.
Manual transmission has better fuel
economy . This is because manual
transmission has better mechanical
and gear train efficiency.
Automatic transmission has not
better fuel economy . This is because
automatic transmission has not
better mechanical and gear train
efficiency as compare to those of
automatic transmission
Manual transmission offers the
driver more control of the vehicle.
Automatic transmission does not
offer the driver more control of the
vehicle as compare to that of
automatic transmission system.

13. Differential was invented to solve a problem: allow
each driven wheel to travel at different speed at the
same time the power is applied to them, this especially
happens when making a turn.
 As you can see in figures above, when a car does a turn,
inner wheels travel a different distance from outer
wheels, forcing each ones to spin at different speeds.
Since speed is equal to distance divided by the time,
inner wheels will spin slower then outside wheels