Friday, March 28, 2008

Electric cars

Electric cars

Just about everyone wants a car but no one Wants to pay for gas well now thanks to technology we don't have to yes thanks to the discovery of the electronic car people can travel solely on the power of electricity but most people say that Unless some new type of battery is invented these electronic Car are nothing more than a dream but these are far more than a dream and very much so a part of reality But what does the future hold for these cars.

The five passenger ESX3 achieves 72 mpg, up two miles from the more aerodynamic ESX2. It's mild-hybrid or mybrid drive train takes a similar approach to that of both Ford and GM PNGV cars, mating a 1.5 liter, all aluminum direct-injection diesel engine to a 15 kilowatt electric motor. Like the Toyota Prius, the 106 pound lithium ion battery pack is wedged between the rear passenger seat and trunk which provides 16 cubic fee (450 liters) of cargo space.

An important component in of the ESX Mybrid system is its EMAT transmission system which utilizes two computer-controlled clutches. The EMAT system combines the smoothness of an automatic transmission with the added fuel efficiency of a manual. The driver sees the normal selection of park, drive, neutral and reverse.

One of the most remarkable features of the ESX3 Mybrid drive is its weight which is less than a conventional gasoline engine. The three-cylinder diesel weighs just 250 pounds (113kg) and the air-colored electric motor just 76 pounds (33kg).

Many people fancy electric vehicles because they had many advantages compared with petrol fueled vehicles. The benefits are:

  • Quiet, Clean Driving Experience On a personal level, electric vehicles offer a quiet, fume-free, smooth driving experience. Since the motor does not operate when the vehicle is at a stop, an electric vehicle has no "idle" noises. When an electric vehicle is under power, the sounds are the soft sound of the motor and the tires rolling over the roadway.
  • High Performance First-time electric vehicle drivers are consistently surprised by the quality of the electric vehicle driving experience. Electric vehicles provide fast acceleration by delivering power instantly to the wheels. By providing high torque at low speeds, they give a feel of smooth and quick responsiveness. Well-designed electric vehicles, like those produced by major auto companies, travel at speeds equivalent to conventional vehicles and offer all the same safety and high-performance features.
  • Lower Operating Costs The per-mile fuel cost of operating an electric vehicle can be less than one-third that of a gasoline-powered car. The exact amount of savings depends on the local electricity rate which varies from utility to utility. In addition, electric vehicle owners say goodbye too many familiar maintenance costs-no more tune-ups, oil changes or muffler replacements.
  • No Gas Stations one of the conveniences electric vehicle drivers like the most is that "Refueling" can be done easily and safely at home overnight, at work, or at public locations like shopping centers, where electric charging units have been installed.
  • Environmentally Friendly Electric vehicles are today's zero-emission vehicles. They have no tailpipes and emit no pollutants. Instead of gasoline from oil refineries, electric vehicles get their "fuel" from electric power stations. Although power plants using fossil fuels do have emissions, power plant emissions generated for electric vehicle use are typically much lower than emissions from the comparable use of gasoline-powered cars. For power plants using renewable energy sources like wind, solar and hydropower, no air pollution at all is created.
  • Energy Security Australia and many other developed countries imports more than half the oil it uses, and the percentage is continuing to rise. Electric vehicles help lessen the country's dependence on imported petroleum and reduce the national security concerns associated with that growing dependency.

When you look at the problems associated with batteries, you gain a different perspective on gasoline. Two gallons of gasoline, which weighs 15 pounds, costs .00 and takes 30 seconds to pour into the tank, is equivalent to 1,000 pounds of lead-acid batteries that cost ,000 and take four hours to recharge. The problems with battery technology explain why there is so much excitement around fuel cells today. Compared to batteries, fuel cells will be smaller, much lighter and instantly rechargeable. When powered by pure hydrogen, fuel cells have none of the environmental problems associated with gasoline. It is very likely that the car of the future will be an electric car that gets its electricity from a fuel cell. There is still a lot of research and development that will have to occur, however, before inexpensive, reliable fuel cells can power automobiles.

While the RAV4-EV shares many features, including body styling and interior appointments, with its IC-engine sibling, the similarities end there. As Mark Amstock, Toyota's manager of North American Alternative Fuels Program, states in the video that accompanies this feature, the RAV4-EV is not a conversion. It has been engineered from the pavement up. And while it weighs 500 pounds more than the gasoline version, it offers virtually all the amenities, performance and handling of its fossil-fuel counterpart.

In 1995, Toyota placed 20 prototype RAV4-EVs in the field, ten in Japan and ten in the US. These were a mixture of lead-acid and nickel metal hydride battery versions that saw service in LA, San Francisco, Sacramento, Detroit and New York. The lessons learned from these field tests have been integrated into the 1998 model, including improved HVAC system, battery management and cooling systems, 5 door, 5 passenger seating, improved motor torque and lengthened wheelbase for a better highway ride.

The heart of the EV model is its 50kW permanent magnet motor and 24 nickel metal hydride batteries rated at 288 volts. The maintenance-free electric motor is neatly integrated into the single speed, front-wheel transaxle and is rated at 67 bhp at between 3,100 and 4,600 rmp. This gives the 3440 lbs. vehicle a combined city/highway driving range of 125 miles and a top speed of 78 mph. According to Armstock, these are real world numbers and not just wishful thinking.

Currently, the drawbacks of the electric vehicles are the cost of buying and operating the vehicle and also the limited distance capacity of one time charging. Many people afraid that they will not find a electric socket or station to charge their vehicle when they are traveling far distances. How far does an electric vehicle can travel? As with gasoline-powered vehicles, the answer is affected by how and where the vehicle is driven speed, stop-and-go, hilly terrain, etc. and on how much the auxiliary systems like heat and air conditioning are used. With an electric vehicle, the answer also depends on the type of batteries. In general, the first-generation electric vehicles now starting to be produced have driving ranges between 40 and 120 miles on a single battery charge. While this obviously is less than gasoline-powered cars, several points are important to remember:

  • Most people drive far less than 50 miles on an average day.
  • Many vehicles in fleets operated by companies or government organizations are assigned to routes that could easily be handled by today's electric vehicles.
  • The driving distance for electric vehicles will become longer as advanced types of batteries, fuel cells, hybrid systems and other technologies continue to be developed.
Costs for charging an electric vehicle will depend on the time of day the owner charge the vehicle, the utility rates, and the type of the electric vehicle. What's almost certain is that people will pay substantially less than you pay to refuel a gasoline-powered car.

I have given a lot of information on my alternative fuel so I hope that it will help us steer away from the use of gasoline.

by Anonymous Student

More Useful Information About Electric Car.

  • An electric car is a vehicle that utilizes chemical energy stored in rechargeable battery packs, and electric motors and motor controllers instead of an internal combustion engine (ICE).
  • Vehicles using both electric motors and ICEs (hybrid electric vehicles) are examples of hybrid vehicles, and are not considered pure electric vehicles (EVs) because they operate in a charge-sustaining mode.
  • Many are capable of acceleration exceeding that of conventional vehicles, are quiet, and do not produce noxious fumes. Electric cars reduce dependence on petroleum and decrease or eliminate greenhouse gas emissions, depending on how their electricity is produced.
  • In general terms an electric car is a rechargeable battery electric vehicle. Other examples of rechargeable electric vehicles are ones that store electricity in ultracapacitors, or in a flywheel.



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