The basic information of gearboxes in automobile and the simply explain the purpose of gearboxes and classified the gearboxes, and advantages of gearboxes............

1. University institute of technology
Barkatullah University Bhopal
SUMMITED BY. SUMMITED TO
PRADUM SAKET. MAYURI CAUREY MAM
SEMESTER -7TH

2. GEARBOXES IN AUTOMOBILE

3. Content :-
1. INTRODUCTION.
•WHAT IS GEARBOX
•PURPOSE OF GEARBOX
2. TYPE OF GEARBOX
3. ADVANTAGES OF GEARBOX

4. INTRODUCTION
The gear box is necessary in the transmission
system to maintain engine speed (or torque) at
the most economical value under all conditions
of vehicle movement.
An ideal gear box would provide an infinite
range of gear ratios, so that the engine speed
should be kept at or near that the maximum
power is developed whatever the speed of the
vehicle.

5. PURPOSE OF GEARBOX
Basically the gearbox serves three purposes:
● To multiply (or increase) the torque (turning effort) being
transmitted by the engine.
● To provide a means of reversing the vehicl.
● To provide a permanent position of neutral.

6. TYPES OF GEARBOX
SLIDINGMESH GEAR BOX SYNCROMESH GEAR BOX
CONSTANT MESH GEARBOX

7. SLIDING MESH GEARBOX
Sliding mesh gearbox is a
transmission system that consists
of various sets of gears and shafts
that are arranged together in an
organised fashion and the shifting
or meshing of different gear ratios
is done by the sliding of gears
towards right and left over the
splined shaft with the help of a
gear lever operated by the driver.

8. CONSTANT MESS GEARBOX
A constant mesh gearbox is a type of
transmission in which all forward
gear pairs remain engaged.In a
constant mesh gearbox, all gears are
in mesh all the time.The constant
mesh gearbox is a type of manual
transmission in which the gears are
meshed or fixed to their positions.In a
constant mesh gearbox the gear
wheels remain engaged all the time.

9. SNCHROMESH GEARBOX
Synchromesh gearbox is a
modification of the constant mesh
gearbox for smooth gear changes.
The main difference between the
constant mesh gearbox and
synchromesh gearbox is that
synchronizer is used in place of
dog clutch in synchromesh
gearbox.In contsant mesh gearbox
lots of noise and vibration is
created during the gear changing
process.

10. ADVANTAGES :-
•High efficiency
• Long life
•Less noise (low noise level)
• High reduction ratios
• Increase in output torque
• Decrease in output speed