kers in f1-4780
TRANSCRIPT
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INTRODUCTION
K.E.R.S. is KINETIC ENERGY RECOVERY SYSTEM. Its a technology in which we can recovers wasted
Kinetic Energy generated under braking &converts it into stored form of energy and utilize
it for next acceleration period.
Max. Power output= 60kw (80hp)Max.energy stored = 400kj
Boost times = 6,666 sec
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Types of KERS
Mechanical based KERS
Electrical based KERS
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MECHANICAL BASED KERS
Kinetic energy is stored in mechanical
Flywheel (Flywheel Energy Storage).
High strength flywheel and CVT
Flywheel made up of steel and carbon fiber
that rotated at over 60,000 RPM.
Flywheel catches deceleration energy ofengine and stores kinetic energy.
400 kJ of usable storage
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Flywheel energy storage having Flywheel and CVT
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During braking the CVT sets the gear ratio to low and
drives flywheel.
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Then during acceleration the CVT sets the gear ratio to
high which enables the flywheel to discharge to thedifferential.
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ELECTRICAL BASED KERS
Kinetic energy is converted into electrical
energy and stored in battery.
Generator/Motor unit.
KERS control unit.
Battery pack.
Energy stored in batteries is used by pressingboost button.
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Energy conversions in electrical KERS
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PHASES IN KERS
Technically, KERS of F1 car can be divided into
two phases as below...
Charging Phase
Boosting Phase
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CHARGING PHASE
In the charging phase, kinetic energy from the
rear brakes is captured by an electric motor
which acts as a generator controlled by a
central processing unit.
Generator generates electricity and store it
into battery.
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Control system of
charging phase
1. Kinetic energy
from the rear
brakes
2. Electric
generator/motor
3. A central
processing unit
4. Batteries
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Boosting Phase
In the boost phase, the electric motor gives
the stored energy back to the engine in a
continuous stream when the driver presses a
boost button on the steering wheel.
After pressing the boost button motor allows
to rotate with high rpm which is connected to
wheels by means of stored energy in battery,results tremendous speed output.
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Working of boost phase5: Boost button
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K.E.R.S. Schematic
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CASE STUDY
McLaren F1 KERS.
McLaren Mercedes used this KERS in
2009Australian Grand Prix for the first time.
Their engine gives 60kw (80hp) of power
output, 400kj maximum energy storage ,6.66
sec of boost time.
Up till now 100% reliability record with no any
failure during race.
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Relation between
speed and time
Speed variation
onAustralian GP
track
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Advantages of KERS
Extra power boost while overtaking & straight
road.
System is economical as we are using west
energy to boost the speed
Plays important role in Qualifying race for
Pole position to deal with the micro seconds.
We can get 80 horsepower used for up to
6.6 sec per lap
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Disadvantages of KERS
Centre of gravity of car become quite a bit higher it
affects on weight distribution of the car.
We cant boost our car while turning otherwise we
will spin-off.
As battery charge & discharge very quickly it get
hot.
Chances of shocking while KERS is activated hencedriver must be dressed with help of well insulated
dress.
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Conclusion
KERS technology takes a moving vehicles
kinetic energy, which is otherwise wasted
during braking, stores it, and then releases it
back as the vehicle accelerates.
It makes energy available to use while straight
road & overtaking.
It saves fuel hence conservation of energy
takes place.
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