Toyota Prius

Energy Efficiency of Motor &
Maddie Clark
Hanna Hartsell
Toyota Prius
 The first mass-produced hybrid vehicle. First sold in Japan in 1997 and the U.S.
in 2001.
 Hybrid Synergy Drive gas/electric engine
 Averages 46 miles per gallon, making it the most fuel-efficient vehicle sold in the
 Classified as a Super Ultra Low Emissions Vehicle (SULEV). Produces less
than 10% of the air pollution of a comparable all-gas vehicle.
 Electric motor is powered by a 200-volt nickel-metal hydride (NiMH) battery that
stores over 1300 watt-hours of energy
Green Features
 Regenerative braking uses a generator to recapture energy that would normally
be lost as heat during braking.
 This is used to recharge the battery when slowing to a stop or going downhill.
 Electric engine is used alone at low speeds to reduce gas consumption.
 The highly efficient gas engine is optimized to run at a high RPM, since the
electric engine is used a lower speeds.
 Warm coolant is automatically stored in an insulated container when the car is
not in use and pumped back in when the car is restarted. This saves gas by
reducing engine warm-up time.
 The unused space in the gas tank is filled by a bladder that expands as the gas
is consumed. This reduces gas lost to evaporation.
Energy Efficient Appliances
 Compact Fluorescent Light bulb
 Laundry
These light bulbs are becoming increasingly
popular as a highly efficient alternative to
standard incandescent bulbs.
Optimal Size Load
A single 20-watt CFL will provide the same
amount of light as a 75-watt
incandescent light bulb and last up to
seven times longer.
Use energy saving features
CFLs use less energy and last longer
Use Lower Temperature settings
Reduce drying time

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