Hybrid-ElectricVehicle historical development
There are various ills in the currently commonly used fuel-engine vehicles. Statistics show that under road conditions that account for more than 80%, an ordinary car uses only 40% of the power potential, and it will drop to 25% in urban areas, which is more serious. It is polluting the environment with exhaust gas. Since the 1990s, the voices of countries all over the world for improving environmental protection have been increasing, and various electric vehicles have come to the fore. Although it is generally believed that the future is the world of electric vehicles, battery technology problems hinder the application of electric vehicles. As the energy density of batteries is hundreds of times worse than gasoline, which is far from the required value, experts estimate that electric vehicles will not be able to replace fuel-engine vehicles within 10 years (unless there is a major breakthrough in fuel cell technology).
Reality forced engineers to come up with a way to get the best of both worlds and develop a hybrid-electric vehicle (Hybrid-Electric Vehicle, abbreviated HEV) car. The so-called hybrid power unit is the combination of an electric motor and an auxiliary power unit in a car as driving force. The auxiliary power unit is actually a small fuel engine or power generator set. To put it more vividly, it is to make the traditional engine as small as possible, so that part of the power is borne by the battery-motor system. This kind of hybrid power unit both exerts the engine's continuous working time.
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