EHV systems technology—A look at the principles and current status

Systems analysis provides a crucial focal point which binds together the various component and subsystem technologies in electric and hybrid vehicle (EHV) development. Basic principles and practices involved in system engineering are examined in order to define this sometimes nebulous concept better. Recent electric vehicle (EV) system developments are reviewed with some emphasis on their fundamental limitations. Hybrid-electric vehicles (HV's) are introduced as an alternative which overcomes many of these limitations. A hybrid concept assessment methodology is presented which utilizes the state of the technology and yet satisfies Department of Energy (DOE) petroleum displacement goals.