| 摘要 |
<p>The invention relates to a series hybrid vehicle, such as an automobile. The vehicle comprises an energy management system, a battery 200, an auxiliary power unit 100 (APU), a load 300 comprising an electric motor 310, and an electrical power bus 400. The vehicle has a first operating mode in which the energy management system determines a target power demand, calculates an APU cost function representing the cost of supplying power from the auxiliary power unit, calculates a battery cost function representing the cost of supplying power from the battery, and calculates a desired APU power to be supplied to the load by the auxiliary power unit and a desired battery power to be supplied to the load by the battery so as to minimise the weighted sum of the APU cost function and the battery cost function to improve fuel efficiency. The invention is aimed at minimizing costs per unit of energy delivered, such as monetary cost, fuel amount, undesirable emissions, component fatigue and/or battery life reduction.</p> |
