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Manakula Vinayagar Institute of Technology
HYBRID ELECTRIC VEHICLE
Presented byJ. Harish
HYBRID VEHICLES
A hybrid electric vehicle (HEV) is a type of hybrid vehicle and electric vehicle which combines a conventional internal combustion engine (ICE) propulsion system with an electric propulsion system
WHY HEV ?Regenerative braking actually makes city
driving more economical than on the highway.Fuel efficiency is greatly increased (twice).Emissions are greatly decreased.Dependency on fossils fuels can be
decreased. Can be run on alternative fuels as well.
Global-Warming: Still An Issue.Hybrids are not zero-emission vehicles.Will cut down emissions of global-warming
pollutants by a third to a half.Later models may cut these emissions down
by even more.
HEV MODEL
How HEVs WorkMMP HEV’s prolong charge on batteries
capturing KE via Regenerative Braking.
HEV’s use ICE to generate Electricity by spinning Electric Generator either to Recharge or to feed power
HOW HYBRIDS ELECTRICAL
VEHICLE (HEV) WORK?
BATTERY CONNECTED
CAR STARTS
BATTERY SUPPLY
About HEVsHEVs 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
CLASSIFICATIONSParallel Hybrids
Series Hybrids
Power-split Hybrids
PARALLEL HYBRIDS
SERIES HYBRIDS
POWER SPLIT HYBRIDS It combines both Series and Parallel HybridsSeries hybrids tend to be more efficient at
lower speeds and parallel tend to be more efficient at high speeds
Hence It is more efficient
HEV EFFIENCYThree key factors: Regenerative braking Engine size Vehicle weight & aerodynamic design
Efficiency Contd….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
Advanced Technologies Regenerative Braking
Electric Motor Drive/Assist
Automatic Start/ Shut Off
HEVs in Transportation
Increasing gasoline prices are making HEVs very attractive to consumers.
HEVs are already available today(In , and their use will become more widespread as production picks up
ADVANTAGESReduced fuel consumption
Excellent gas mileagr
HEV is able to operate nearly twice as efficiently as traditional internal combustion vehicles
Lighter batteries than electric vehicles
Regenerative braking system stores electrical energy in Batteries
Uses less fuel to recharge batteries
CONCLUSIONSo, the HEVs have more efficiency, Low Fuel
Economy, High Reliability and Less Air Pollution.
Optimum Utilisation of these Vehicles will yield in good Results, especially Reduction of pollution.
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