Hybrid Electric Car/Vehicles

 A hybrid  car or vehicle (HV) is a vehicle using an on-board rechargeable energy storage system (RESS) and a fuelled power source for vehicle propulsion. The HV pollutes less and uses less fuel. The different propulsion power systems may have common subsystems or components. The HV provides better fuel economy than a conventional vehicle because the engine is smaller and may be run at speeds providing more efficiency.

The term most commonly refers to petroleum-electric hybrid vehicles, also called Hybrid-electric vehicle (HEV) or Hybrid-electric Car  which use internal combustion engines and electric batteries to power electric motors. Modern mass-produced hybrids prolong the charge on their batteries by capturing kinetic energy via regenerative braking. As well, when cruising or in other situations where just light thrust is needed, "full" hybrids can use the combustion engine to generate electricity by spinning an electrical generator to either recharge the battery or directly feed power to an electric motor that drives the vehicle. Nearly all hybrids still require gasoline and diesel as their sole fuel source though other fuels such as ethanol or plant based oils have also seen occasional use. A number of other hybrid vehicles use hydrogen fuel.

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