Electric vehicles and compressed natural gas vehicles are alternative fuel vehicles. Electric vehicles are propelled by electric motors powered by batteries that are charged by electricity, often from renewable sources, and produce no exhaust emissions. Compressed natural gas vehicles use compressed or liquefied natural gas and have lower emissions than gasoline vehicles. Both have advantages like reduced pollution but electric vehicles have higher upfront costs and limited driving range while CNG vehicles require larger fuel storage space. Future developments may make electric vehicles more widespread and efficient.

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ANANTHASAI P D
S5 Electronics

2. INDEX
*What IS AN EV
*What IS AN CNGV
*Preparation
*Working
*Advantages
*Disadvantages
*Future
*Conclutlon
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3. WHAT IS AN EV?
*ELECTRIC VEHICLES are propelled
by electric motors and uses electric
energy stored in the batteries
Unlike vehicles with combustion engines, EV do not produce exhaust
gases during operations. This make EV more environment friendly
then fuel engines. How ever, the electrical energy for charging the
electric vehicle is produced from the renewable sources (eg:from
wind, solar, hydroelectric or biogas power plants. By combining
different drive types the overall efficiency of the vehicle can be
improved and fuel consumption can be reduce
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4. What IS AN CNGV
* A natural gas Vehicles is an alternative fuel
Vehicle that uses compressed natural gas or
liquefied natural gas.

7. Working CNG Vehicles
*The CNG fuel system releases high pressure gas from
the fuel tank and transfers it through the fuel tank and
transfers it through the fuel lines. The pressure
regulator reduces the pressure, which is compatible
with engine fuel injection system. Then, CNG transfers
to the combustion or manifold chamber, mixing with air

9. ADVANTAGES
*Due to absence of Lead and Benzene, pollution reduces
*Low maintenance cost than other vehicle
*Increases the life of lubricating oil.
*It mixes easily and evenly in air.
*More efficiency.

10. IMPORTANCE
*It is cheap than other fuels
*It is dispersed quickly when released.
*It is lighter than air
*It releases less carbon in atmosphere

11. DISADVANTAGES
*Gas storage in a car.

12. DISADVANTAGES
*CNG vehicles requires a greater amount of
space for fuel storage than conventional
gasoline powered vehicles.

13. SOLUTION
*Install the tank under the body of
the vehicle leaving the trunkfree.
eg. Fiat Multipla, Volkswagen Touran Ecofuel,
Volkswagen caddy Ecofuel.
*Installation of tank on the roof (typical on Buses)

14. Working electric vehicles
*Electric cars function by plugging into a charge
point and taking electricity from the grid. They store
the electricity in rechargeable batteries that power
an electric motor, which turns the wheels. Electric
car accelerate faster than vehicles with traditional
fuel engines-so they feel lighter to drive.

17. DISADVANTAGES OF
ELECTRIC
VEHICLES
*INITIAL INVESTMENT IS HIGH
*ELECTRICITY IS NOT FREE
*LACK OF CHARGING STATION
*SHORT DRIVING RANGE
*BATTERY REPLACEMENT COST IS HIGH

18. FUTURE OF ELECTRIC VEHICLES
*ABOUT 5 MILLON CARS WILL BE ON THE ROAD BY 2025
*CREATING INCENTIVE TO PROMOTE ZERO EMMISION VEHICLES
*CURRENTLY WORKING TO CREATE MORE EFFICIENT AND LIGHTER BATTERIES
*THEY ARE ALSO RESEARCHES BEING DONE ON FUEL CELL
*CREATING BUILDING CODES, THAT MAKES IT EASIER TO CONSTRUCT NEW
CHARGING STATIONS.

20. CONCLUSION
*EV IS ENVIRONMENT FRIENDLY
*IT LOWERS OUR TOXIC EMISSION
*IT REDUCES HEALTH PROBLES FROM AIR POLLUTION
*ITLOCALIZE GREEN HOUSE EFFECT
* BATTERY RE- CYCLING IS POSSIBLE THEREFORE
REDUCES E-WASTE

21. *CNG is most useful for vehicles as fuel to
reduce the pollution and it is cheap than
other fuels like petrol and diesel.