Pollution has become a serious issue in the world, particularly in countries where urbanization leads to congested environment with jammed traffic on the roads. Massive amounts of polluting matter are released from vehicles every day. Engineers started to focus on an alternative technology to tackle the pollution issue. This gave rise to electric vehicles (EV). These EVs enable full utilization of energy and produce virtually zero emissions and will hence reduce urban pollution dramatically. Hybrid power systems were conceived as a way to compensate for the shortfall in battery technology.  A Hybrid Electric Vehicle (HEV) combines the internal combustion engine of a conventional vehicle with the battery and electric motor of an electric vehicle. The practical benefits of HEVs include improved fuel economy and lower emissions. The inherent flexibility of HEVs will allow them to be used in a wide range of applications.