Tuesday, February 26, 2008

ELECTRIC

WHAT IS ELECTRIC CAR AND HOW IT WORKS

The electric car is a vehicle that utilizes chemical energy stored in rechargeable battery packs, and electric motors and motor controllers instead of internal combustion engines (ICEs).

Vehicles using both electric motors and ICEs (hybrid electric vehicles) are examples of hybrid vehicles, and are not considered pure battery electric vehicles (BEVs) because they operate in a charge-sustaining mode. Hybrid vehicles with batteries that can be charged externally to displace some or all of their ICE power and gasoline fuel are called plug-in hybrid electric vehicles (PHEV), and are pure BEVs during their charge-depleting mode. BEVs include automobiles, light trucks, and neighborhood electric vehicles.

Electric cars were among the earliest automobiles. They produce no exhaust fumes, and minimal pollution if charged from most forms of renewable energy. Many are capable of acceleration exceeding that of conventional vehicles, are quiet, and do not produce noxious fumes. BEVs may reduce dependence on petroleum and decrease greenhouse gas emissions, depending on how their electricity is produced.

The Toyota RAV4 EV

was powered by twenty-four 12 volt batteries, with an operational cost equivalent of over 165 miles per gallon at 2005 US gasoline prices

Historically, BEVs and PHEVs have had issues with high battery costs, limited travel distance between battery recharging, charging time, and battery lifespan, which have limited widespread adoption. Ongoing battery technology advancements have addressed many of these problems; many models have recently been prototyped, and a handful of future production models have been announced. Toyota, Honda, Ford and General Motors all produced BEVs in the 90s in order to comply with the California Air Resources Board's Zero Emission Vehicle Mandate. The major US automobile manufacturers have been accused of deliberately sabotaging their electric vehicle production efforts.[1][2]

Battery EVs may be cheaper to make and maintain than internal combustion engine vehicles because they have many fewer parts[citation needed]. Using regenerative braking, a feature which is standard on many electric and hybrid vehicles, a significant portion of energy may be recovered.[3][4]

In general terms a battery electric vehicle is a rechargeable electric vehicle. Other examples of rechargeable electric vehicles are ones that store electricity in ultracapacitors, or in a flywheel.

EXAMPLE

TESLA THE ELECTRIC CAR OF THE YEAR2007

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