While the cost of fuel has put a damper on the travel plans of many Americans, one father-son engineering duo with a passion for RV travel is combating the problem by conceptualizing an electric-hybrid passenger vehicle with the ability to improve fuel economy and increase the acceleration of the motorhome towing it, according to a release from the University of Alabama published by physorg.com.
Steve Shepard Jr., associate professor of mechanical engineering at The University of Alabama, and his father, Steve Shepard Sr., a former faculty member and researcher at Mississippi State University, developed the idea for a hybrid dinghy pusher after the cost of fuel curtailed both families’ traveling plans.
In this concept, the dinghy consists of a hybrid SUV towed by the RV. When driven as a standard automobile, the SUV operates as a fully-functional hybrid vehicle. When towed behind a RV, the SUV switches into the hybrid dinghy pusher mode, where only the electrical portion of the hybrid-SUV is utilized. The hybrid dinghy pusher, known as an HDP, works by going into generator mode and storing energy when going downhill, and energy previously stored in the batteries is used to help push the motorhome up hill. The previously stored electrical energy in the hybrid dinghy pusher can also be used to help accelerate the motorhome more quickly from a stop or while just driving down the road.
A conventional hybrid SUV is adapted to utilize its electric system to recycle energy when being towed. The HDP’s on board motors provide propulsion during acceleration and act as electric generators during braking. The assistance provided to the motorhome by the HDP is not meant to replace the propulsion provided by the motorhome engine; it simply supplements it to improve acceleration and reduces wear on the RV engine. Unlike typical towed dinghies, motorhomes towing an HDP would experience a decrease in fuel consumption and an increase in acceleration performance.
According to the Shepards, hybrid motorhomes are just now coming onto the market, and they are expensive. Besides being a cheaper alternative to a hybrid motorhome, the greatest advantage of this new concept is that the HDP not only assists the motorhome in transit, but it also provides the motorhome owners with a hybrid vehicle to drive after arriving at their destination. Other advantages of implementing such a system are improved fuel mileage, reduced rate of wear on brake components and improved mobility for users of RVs and the dinghy.
Working with the University of Alabama’s Office for Technology Transfer, the Shepards are in the process of securing a development partner to bring this cutting-edge technology to the market. UA originally filed a U.S. provisional patent application, which has since been converted to a full utility patent application.