here. - Green ITS

Report
HOW TECHNOLOGY
AND
CAN
SAVE FUEL AND
THE ENVIRONMENT
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Vehicle Pollution and the Environment
 Burning gasoline to power vehicles pollutes the
air and causes smog
 Emissions from cars contribute to global
warming
 You can help save the environment by using
fuel more efficiently
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With this setup you can:
 Test different driving habits and see how YOU can
save fuel to help the environment
 Check out new vehicle technologies and how they
can improve fuel economy
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Internal Combustion Engine (Gas) Vehicles
 A mixture of gasoline and air
powers the engine
 Engine emissions pollute the
air
 Only about 14-26% of fuel
energy is used – much of it is
lost in the engine as heat
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Hybrid Vehicles
 They are powered by both an electric
motor and a gasoline engine
 Regenerative braking turns vehicle
kinetic energy into reusable electricity
while braking
 Engine turns off when the car is
stopped; restarts when the car moves
http://www.fueleconomy.gov/feg/hybrid_diag.gif
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Electric Vehicles (EV)
 Rechargeable batteries
provide power to an electric
motor
 Less use of fossil fuels
 EVs convert over 80% of
battery energy to power the
wheels
 No exhaust gas!
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Energy Losses and Vehicle Efficiency:
Type of vehicle you
drive
Amount of fuel
used
Your driving
style
There are a lot of reasons why a vehicle loses energy. Some of the
main reasons are:
 Air resistance
 Rolling resistance
 Engine losses
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 Driving style
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Air Resistance:
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is the force of drag
on the vehicle
is the density of air
is the speed of the
vehicle relative to the
air
is the drag
coefficient
is the vehicle front
area
More speed
More energy
lost
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 When driving at
highway speeds, wind
resistance takes about
40% of your car’s
energy
 Air resistance is directly
proportional to the
square of the vehicle’s
velocity
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Rolling Resistance:
is the force of
rolling resistance
is rolling resistance
coefficient
is the tire normal
force
 Rolling resistance is
related to the mass of
the vehicle and the
rolling coefficient
 Low tire pressure
increases rolling
resistance
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Engine Losses
Engine speeds are measured by Rotation Per Minute or RPM
 By using less engine RPM, you can lower engine
losses
 Engines need to breath! Keep engines’ air filters
clean to save fuel
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Tips For Better Driving
 Drive slower to help lower air resistance
 Make sure your tire pressure is right. Low tire
pressure increases fuel consumption
 Don’t drive aggressively! Try not to brake or
accelerate more than you need to
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Acknowledgments
We are grateful for the financial support of Ontario Research
Fund and Automotive Partnership Canada for the development
of this setup.
The contributions of Kevin Cochran, Mitch Rushton, Babak
Ebrahimi, Xiang Fang, and Adrian Neil have been significant in
the design, fabrication and programming of this setup and are
very appreciated.
Amir Khajepour, PhD, PEng
Professor and Canada Research Chair in
Mechatronic Vehicle Systems
Principal Investigator, Green Intelligent Transportation Systems – Green ITS
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