Patent ID: 6484830
Filing Date: 2002-11-26
Classification: B60K,B60L,B60W,Y02T,Y10S

Abstract:
A hybrid electric vehicle comprised of:a drive train; an electric motor for driving said drive train; a power unit electrically coupled to said electric motor, an electric energy storage system electrically coupled to said electric motor; and wherein said power unit and said electric energy storage system provide electricity to said electric motor for powering said vehicle; a power management controller programmed to control output power of said power unit to maintain said energy storage system between a predetermined high voltage set-point and a predetermined low voltage set-point; wherein voltage levels of said energy storage system are maintained by an inversely proportional ratio of vehicle speed to storage voltage; and wherein power from said power unit is increased to maintain the desired ratio of vehicle speed, to storage voltage if said voltage level of said energy storage system drops at a fester rate than desired.