Patent ID: 8151916

Claim:
An energy management system, comprising: a first energy source having a first well-to-wheels greenhouse gas emissions content; a second energy source having a second well-to-wheels greenhouse gas emissions content; a prime mover disposed in power communication with said first energy source; a power distribution and conversion mechanism disposed in electrical communication with said prime mover and said, second energy source; an electric drive mechanism drivingly engaged by said power distribution and conversion mechanism; a controller communicating with said first energy source, said second energy source and said power distribution and conversion mechanism; and wherein said controller is adapted to operate said electric drive mechanism using said first energy source when said first well-to-wheels greenhouse gas emissions content is less than said second well-to-wheels greenhouse gas emissions content and said controller is adapted to operate said electric drive mechanism using said second energy source when said second well-to-wheels greenhouse gas emissions content is less than said first well-to-wheels greenhouse gas emissions content.