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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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