Automotive Drivetrains
Presented by
Nasif Bin Nazrul
Chemical Engineering
(2029030)
Group B
Drivetrain
Transfers power from the engine to the wheels, allowing the vehicle to
move.
Types of Drivetrains
Front-Wheel Drive (FWD)
Rear-Wheel Drive (RWD)
Types of Drivetrains
 For racing cars, the most commonly
preferred drivetrain is Rear-Wheel
Drive (RWD)
All-Wheel Drive (AWD)
Transmission
• Manual transmission
• Automatic transmission
• continuously variable transmission (CVT)
Transmission Mechanism
Clutch Engagement
Gear Selection
1.Synchronization
2.The synchromesh device makes frictional contact
with the selected gear pair
1.Gear Engagement
• The selected gear pair, with the appropriate gear
ratio, meshes with the synchromesh device.
Power Transfer
Clutch Release
Manual transmission
Driveshaft
Differential
Open differential
Limited-slip differential (LSD)
Differential mechanism
1.Power from the
engine is transferred to
the ring gear.
1.The ring gear drives
the pinion gear.
1.Torque is transferred
from the pinion gear to
the side gears.
1.The side gears are
connected to the axle
shafts.
1.The differential allows
the wheels to rotate at
different speeds.
1.During a turn, the
inside wheel rotates
slower than the outside
wheel.
1.Both wheels receive
equal power under
normal conditions.
1.Torque is distributed
equally between the
side gears.
1.The wheel with less
resistance receives more
torque.
1.This enables smooth
turning and
maneuverability.
1.However, if one wheel
loses traction, power is
sent to the wheel with
less resistance.
1.This can result in
reduced overall traction
and wheel spin.
Differential
1.Open Differential:
2.Limited-Slip Differential (LSD):
•Allows the wheels on an axle to rotate at
different speeds.
•Provides a variable amount of power distribution between the
wheels.
•Power is distributed equally between the
wheels, which is beneficial for normal
driving conditions and maneuverability.
•Transfers more torque to the wheel with better traction,
improving overall grip and stability.
•When one wheel loses traction, it
receives most of the power, causing wheel
spin and potential loss of control.
•Helps prevent excessive wheel spin and loss of control in
challenging conditions, such as uneven surfaces or during
cornering.
•Suitable for standard road vehicles with
regular driving needs
•Offers improved traction and performance, especially in highperformance or sports vehicles.
Differential Preferred for KILOFLIGHT
An open differential is simpler in design and operation compared to a limited-slip
differential (LSD). It allows the wheels to rotate at different speeds, making it easier
to maneuver the vehicle during turns and low-traction situations. The equal
distribution of power between the wheels ensures smoother handling and reduces the
risk of sudden loss of control.
Moreover, an open differential is generally more forgiving and less prone to abrupt
changes in traction conditions, making it more manageable. It provides predictable
behavior, which is important for a formula student vehicle like KILOFLIGHT where
driver skill levels may vary.
While an LSD can offer improved traction and performance, it may require more
expertise to operate and maintain effectively. It could introduce complexities and
challenges that might not be ideal for a formula student racing car.
Axles and CV Joint
Universal joint
connects the driveshaft to the differential
THANK YOU