WhyHybridCars.net
A hybrid electric vehicle is a hybrid vehicle that combines a rechargeable energy storage system with a conventional propulsion system to achieve better fuel economy than a standard internal combustion engine alone. Hybrid Vehicles have a secondary propulsion system, in addition to the electric motor (or motors, depending on the vehicle), means that it does not require visits to a charging unit.
There are several types of hybrid vehicles, first we have the series hybrid. Diesel-electric locomotives and ships started using this technology late in the 20th century. In a series hybrid car, a large electric motor propels the vehicle. A series hybrid is only an electric vehicle in the sense that the electric motor drives the wheels, the electricity is produced by an internal combustion engine working as a generator for the batteries to power the electric motor. The series hybrid still uses fuel and produces emissions. This version of the hybrid is not currently available to the public.
Parallel hybrids are much simpler and less expensive for current production and use. With the parallel hybrid, the engine and electric motor work together to power the vehicle. The internal combustion engine propels the vehicle and the electric motor is there to propel the vehicle once it it at a steady speed, but only for fairly short distances. It can also be used for a small amount of extra power. The batteries are powered by regenerative braking.
Third are the Series-Parallel hybrids, they are a combination of both of the above mentioned hybrid vehicles. Both the internal combustion engine and the electric motor are fed into the transmission through separate connections, making either or both available at any time. The internal combustion engine can either drive the vehicle or charge the batteries as the electric motor propels the vehicle. These vehicles are equipped with a sophisticated computer system that monitors conditions and determines which drive motor is the most efficient at any given time. As of current research, the series-parallel hybrids offer the most miles per gallon as well as higher speeds and longer runs with only the electric motor.
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