Presented by:-
PRAVEEN .S. TELI

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What Is a Hybrid Electric Vehicle (HEV)?
 The combination of an internal combustion engine (ICE) with one or more electric motor/generators and a battery pack’
 Combines I.C.Engine With Electric Motor and gets Better Fuel economy.
 An HEV uses less gasoline because the electric motor does some of the work.
History of HEVs
 1997 – First modern HEV introduced in Japan: Toyota Prius (on left below)
 1999 – First modern HEV sold in U.S.:
Honda Insight (on right below)
About HEVs
 HEVs offer the efficiency of electric-powered vehicles without having to recharge by using conventional engines and fuels.
 Efficiencies are gained from motor down-sizing and regenerative braking.
 Inherent flexibility allows use for numerous applications.
HEV Efficiency
Three key factors:
 Regenerative braking
 Engine size
 Vehicle weight & aerodynamic design
 Engine size = may be smaller than in a conventional vehicle
 Engine is sized to accommodate average load – not peak load
 Vehicle weight/aerodynamic design:
 Built using special lightweight materials
Uses advanced aerodynamics to reduce drag
Regenerative Braking
 Recaptures kinetic energy normally lost as heat during braking
Kinetic energy = energy of motion
 Electric motor acts as a generator when brakes applied
 Converts kinetic energy to electrical energy, stored in batteries.