Kinetic Energy Recovery System

A Seminar on

Kinetic Energy Recovery System

(KERS)Prepared By:Amarendra AcharyaMechanical Engineering- 7th SemesterNIT, Bhubaneswar

Supervised by:MR. S.P. JenaHOD, Mechanical Department

CONTENTS

• KERS- INTRODUCTION• BASIC ELEMENTS• WORKING PRINCIPLE• TYPES OF KERS• ELECTRICAL KERS• MECHANICAL KERS• ADVANTAGES• ONROAD APPLICATIONS• CONCLUSION

What is KERS?• The acronym KERS stands for Kinetic Energy

Recovery System.

• The device recovers the kinetic energy that is present in the waste heat created by the car’s braking process.

• It stores that energy and converts it into power that can be called upon to boost acceleration.

BASIC ELEMENTS OF KERS

• First, a way to store and then return energy to the power train and

• Second, a place to store this energy.• Main three components are:

Power Control Unit

Motor/Generator Unit

Batteries/Flywheel

WORKING PRINCIPLE

• Store the energy during braking and converts into power, that can be used to boost acceleration.

• Operates through two cycles:

Charge Cycle

Boost Cycle

Types of KERS

A mechanical KERS system

An electrical KERS system

ELECTRICAL KERS•POWER CONTROL UNIT•MOTOR / GENERATOR UNIT

PCU (Power Control Unit)• Invert and control

the switching of current from the batteries to the MGU.• Monitor the status

of the individual cells with the battery.

MGU (MOTOR/GENERATOR UNIT)

• Consist of distinct motor and generator machines coupled together.

• Creates the power for the batteries when the car is braking.

• Return the power from the batteries to add power directly to the engine.

WORKING PRINCIPLE OF ELECTRICAL KERS

MECHANICAL KERS

• Flywheel.

• Continuously variable transmission (CVT).

FLYWHEEL

• Energy storage device.• Transfer the

energy to and from the driveline.

CONTINOUSLY VARIABLE TRANSMISSION

• Cope with the continuous change in speed ratio between the flywheel and road-wheels.

• Provide variable gear ratio which enables flywheel to store and release energy.

ADVANTAGES• High power capability.• Light weight and small size.• Completely safe.• A truly green solution.• High efficiency storage and recovery.• Low cost in volume manufacture.• Very high speeds can be achieved.

On road applications

• The Flybrid® 9013 hybrid system has been fitted to the Jaguar XF demonstrator.

KERS IN F1

Kimi Räikkönen took the lead of the 2009 Belgian Grand Prix with a KERS-aided overtake and subsequently won the race.

CONCLUSION• It’s a technology for the present and the future because it’s

environment-friendly, reduces emissions, has a low production cost, increases efficiency and is highly customizable and modifiable. Adoption of a KERS may permit regenerative braking and engine downsizing as a means of improving efficiency and hence reducing fuel consumption and CO2 emissions.

• The KERS have major areas of development in power density, life, simplicity, effectiveness and first and foremost the costs of the device. Applications are being considered for small, mass-production passenger cars, as well as luxury cars, buses and trucks.

REFERENCE• Wikipedia• autosport.com• saeindia.org • Cross, Douglas. "Optimization of Hybrid Kinetic Energy

Recovery Systems (KERS) for Different Racing Circuits." SAE Digital Library. SAE International. Web. 25 Sept. 2009.

• Sorniotti, Aldo, and Massimiliano Curto. "Racing Simulation of a Formula 1 Vehicle with Kinetic Energy Recovery System." SAE Digital Library. SAE International. Web. 25 Sept. 2009.