A hybrid electric vehicle combines a conventional internal combustion engine with an electric propulsion system to increase fuel efficiency and reduce emissions. HEVs can achieve twice the fuel efficiency of conventional vehicles through regenerative braking and a smaller engine size. While not zero-emissions, HEVs reduce global warming pollutants by a third to a half compared to gas-only vehicles. HEVs work by using an electric motor and batteries to supplement the gasoline engine, capturing energy through regenerative braking to recharge the batteries.

1. HYBRID ELECTRIC
VEHICLE
Presented by
J. Harish

2. 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

3. 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.

4. 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.

5. HEV MODEL

7. How HEVs Work
MMP 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

8. HOW HYBRIDS
ELECTRICAL VEHICLE
(HEV) WORK?

9. BATTERY CONNECTED

10. CAR STARTS

11. BATTERY SUPPLY

16. 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

17. CLASSIFICATIONS
 Parallel Hybrids
 Series Hybrids
 Power-split Hybrids

18. PARALLEL HYBRIDS

19. SERIES HYBRIDS

20. POWER SPLIT HYBRIDS
 It combines both Series and Parallel Hybrids
 Series hybrids tend to be more efficient at lower speeds
and parallel tend to be more efficient at high speeds
Hence It is more efficient

21. HEV EFFIENCY
Three key factors:
 Regenerative braking
 Engine size
 Vehicle weight & aerodynamic design

22. Efficiency Contd….
Engine size = may be smaller than in a conventional
vehicle

Engine is sized to accommodate average
– not peak load
Vehicle weight/aerodynamic design:
 Built using special lightweight materials
 Uses advanced aerodynamics to reduce drag
load

23. Advanced Technologies
Regenerative Braking
Electric Motor Drive/Assist
Automatic Start/ Shut Off

24. 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

25. ADVANTAGES
 Reduced 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

26. CONCLUSION
So, 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.

27. Queries