30-04-2011, 10:11 AM
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PRAVEEN .S. TELI
Praveen Teli.ppt (Size: 4.71 MB / Downloads: 253)
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.
PRAVEEN .S. TELI
Praveen Teli.ppt (Size: 4.71 MB / Downloads: 253)
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.