Clean Transportation (cont'd)
How Electric and Hybrid Electric Vehicles Work
Electric Drive
Electric vehicles operate on electric batteries, which last for a certain time and range and then are
recharged or replaced.
When an EV's ignition is turned on, the battery sends
energy to the motor through a sophisticated motor control unit. Electric
energy is converted into mechanical energy, and, through a mechanical
drive system in the wheels, the motor propels the vehicle. An EV uses
energy only while it is in motion. When the vehicle brakes, the
mechanical energy is converted back into electric energy to charge the
battery.
With no spark plugs, oil or gas filters or mufflers,
EVs require less maintenance than gasoline-powered vehicles. Current
battery technology provides a range of 40 to 65 miles per charge, but
longer-range batteries are under development.
Hybrid Electric
Hybrid-electric vehicles are drawing increased
attention as the next step in of clean-energy transportation. A
hybrid-electric vehicle is equipped with an auxiliary power unit that
runs on a variety of fuels, including gasoline, diesel or natural gas.
The auxiliary unit can recharge the vehicle’s battery or power its
wheels. Hybrids have greater range than their all-electric counterparts
and are more efficient and less polluting than standard vehicles.
Through our diverse Clean Transportation Program, we
will continue to contribute to the growth and acceptance of clean,
efficient electric-drive technology. In so doing, we are demonstrating our
commitment to the environment and
providing one more example of how we generate more than electricity. |