11-01-2014, 03:58 PM
Green Vehicles
Green Vehicles.ppt (Size: 558 KB / Downloads: 22)
What are Green vehicles?
A green vehicle or environmentally friendly vehicle is a road motor vehicle that produces less harmful impacts to the environment than comparable conventional internal combustion engine vehicles running on gasoline or diesel, or one that uses certain alternative fuels.
Green vehicles can be powered by alternative fuels and advanced vehicle technologies.
Hybrid vehicles
The two power sources found in hybrid
vehicles may be combined in different
ways, either in parallel or series
Either one will allow the gasoline engine to shut down when it is not needed.
HIGH VOLTAGE ELECTRICAL SYSTEMS
Power for the electric motor is supplied by high-voltage nickel-metal hydride battery
Voltage ranges from 144 volts to 650 volts of DC current
The batteries are preferred because they can be recharged and they are economical
Battery powered
Here we use the charge stored in batteries to run the vehicles.
Usually metal hydride batteries are used.
Individual cells originally contained liquid potassium hydroxide
The liquid is almost totally absorbed by the paper membranes inside each cell of the battery
Because the liquid is absorbed these batteries are considered “dry cell” batteries
Improving conventional vehicles
Most of the vehicles we use today run on either gasoline or diesel.
The efficiency of these vehicles can be increased by mixing renewable fuels or using less carbon intensive fossil fuel.
For example, using ethanol blended gasoline.
Difficulties in adopting
Electrically driven vehicles are less efficient.
Technology is not completely developed to harness solar energy to run vehicles.
We cannot mix the bio-fuels with gasoline in any quantity. Today’s vehicles atmost allows the use of 20% of ethanol with gasoline.