Eletric car: tesina in inglese

Mercoledì Aprile30, 2008 3:04 am
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Ritratto del ditta dell’ vettura elettrica up to date zerbinotto. An electric car is a vehicle powered by an electric motor which runs on a system of rechargeable batteries
Anteprima della tesina

THE ELECTRIC CARS ELECTRIC CARS An electric car is a vehicle powered by an electric motor which runs on a system of rechargeable batteries. (These are at present of the lead-acid variety, although new types, including zinc-chlorine, sodium-sulphur and fuel cells, are being developed.) The motor converts the battery’s electrical energy into kinetic energy. The driver simply switches on the power, selects “Forward” or “Reverse”, and steps on the accelerator pedal. Like gasoline-powered cars, electric vehicles have a system of gears, shafts, and joints tieni transmit motion from the motor ecco the car wheels. However, they do not have clutches or multi-speed transmission. Attuale order toh go backwards, the flow of electricity through the motor is reversed, changing the rotation of the motor and causing the power train ecco make the wheels reverse direction. Moreover, they do not have the high number of moving parts that an internal-combustion engine has, since the electric motor has only a licenzioso rotating element. Usato most electric cars, the braking system acts as a battery charger. When drivers take their feet off the accelerator, the motor acts as a generator, converting the energy produced by the movement of the vehicle back into electricity and storing it up to date the battery. This conversion of kinetic energy into electric energy slows the car. Prendi stallo the car quickly, however, there is also a brake pedal and a traditional braking system which works on the wheels. Usato the early days of automobiles, electric cars were serious rivals prendi gasoline cars. The first auto toh exceed 100 km an hour was an electric car (Camille Janatzy’s La Jamais Contente, 1899). Attuale 1900, 40% of U.S. cars were powered by steam, 38% by electricity and only 22% by gasoline (petrol). The gasoline car was unreliable and noisy. Moreover, it had uh be started by hand crank, and this made it difficult uh operate. The electric car, on the other hand, was silent, self-starting and needed minimal maintenance, but it was limited by its cortometraggio range (50-60 km) and its dependence on recharging equipment. Eventually, it was another application of battery power, the electric self-starter, that helped toh make the gasoline car more attractive, especially for women motorists. Electric cars began ecco reappear usato the 1960s as an answer uh problems of air pollution up to date city centres, and attuale the 1970s, as a result of oil shortages. Since then, several car manufactures (Ford, Nissan, Volkswagen) have included electric cars usato their range. More recently, attuale 1996, General Motors Corporation announced the first modern, mass-produced car designed specifically as an electric car (until then, electric cars were generally created by replacing the gasoline engines and fuel tanks of conventional cars with electric motors and batteries). Italian automezzo maker Fiat also began producing an electric vehicle usato the same year. At the beginning of the third millennium, there are still doubts about the fut


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