Search Results

A Hybrid Electric Vehicle(HEV) has been developed for use in the intercollegiate 1993 and 1994 Hybrid Electric Vehicle Challenges. A conventionally powered vehicle was converted to a series drive hybrid electric vehicle, named AMPhibian II. The AMPhibian is designed to be an economically feasible HEV, for use in near term applications. To accomplish this, all components are based upon existing technology. Regenerative braking is used to improve the range and economy of the hybrid electric vehicle. The design and performance of the vehicle, including the relative benefits of regenerative braking are reported.

Lead-acid batteries are currently the least expensive option for use in hybrid electric vehicles. The battery selection process for use in hybrid electric vehicles is complicated due to the limited use of these vehicles. Considerable data exists for the use of lead-acid batteries for other purposes. Unfortunately, much of this data is not directly applicable when these batteries are to be used in hybrid electric vehicles. Currently, there exists a wide variation in the type and format of battery data that is provided by the manufacturers. A comprehensive survey of deep cycle lead-acid batteries was conducted. Batteries were compared using manufacturers published data. To provide a consistent basis for comparison, various performance parameters-energy capacity, capacity, weight, and volume- were normalized with respect to both weight and volume. Additionally, all data was normalized to reflect three hour discharge rates. The battery selection process is then described in detail.

The design specifications and the results of the performance and emissions testing are reported for a series Hybrid Electric Vehicle(HEV) which was developed by a team of midshipmen and faculty at the United States Naval Academy. A 5-door Ford Escort Wagon with a manual transmission was converted to a series drive hybrid electric vehicle. The propulsion system is based on a DC motor which is coupled to the existing transmission. Lead-acid batteries are used to store the electrical energy. The auxiliary power unit(APU) consists of a small gasoline engine connected to a generator. All components are based upon existing commercial technology.