Scuderi Group Reveals Turbocharging Breakthrough

Studies have concluded that the new engine design, when boosted with a turbocharger to 3.2 bar, decreases the BSFC (or brake specific fuel consumption) up to 14 percent, as a simultaneous increase occurs in the engine’s power BMEP (or brake mean effective pressure) by 140 percent. At the same time the engine can be reduced in size by roughly 29 percent.



Consistent with conventional four-stroke engine designs, the combustion cycle of the Scuderi™ Engine has two high-pressure strokes—compression and power, and two low-pressure strokes—intake and exhaust. The power stroke is positive work, or the energy that is produced by the expanding gases to create mechanical work. The intake, compression and exhaust strokes are all negative work, or the energy that the engine consumes to create mechanical work. By separating the compression cylinder from the power cylinder and by using a standard turbocharger to convert recovered exhaust-gas energy into compressed air energy, the size of the compression cylinder can be downsized to achieve substantial reductions in negative compression work.



“The Scuderi Engine gains a massive advantage from turbocharging, Miller-like valve control strategies and extended expansion that is simply not possible with conventional engine designs,” said President of Scuderi Group, Sal Scuderi. “The net result is a smaller, higher-performing engine that yields significant gains in volumetric efficiency and power as well as reducing BSFC. Studies are underway at the lab that will be announced in the coming weeks, that will show impressive results of the Scuderi™ Split-Cycle engine modeled in a 2011 Nissan Sentra. ”



Along with the exhibit, the Scuderi Engine will also be featured in two technical paper presentations on April 13 at the Detroit Cobo Center:



•“Scuderi Split-Cycle Research Engine: Overview, Architecture and Operation” – 8:40 AM ET, Room W2-64

•“Scuderi Split-Cycle Fast Acting Valvetrain: Architecture and Development” – 9:00 AM ET, Room W2-64

To listen to an audio podcast of Sal Scuderi discussing the recent lab breakthrough, go to: http://www.scuderiengine.com/turbocharging.



For more information on the Scuderi Engine, visit online at www.ScuderiEngine.com.



About the Scuderi™ Engine



The Scuderi Engine divides the four strokes of a combustion cycle between two paired cylinders—the left cylinder functions as an air compressor, handling intake and compression, while the right cylinder handles combustion and exhaust. Key to Scuderi’s split-cycle design is that it compresses the air before it fires. By optimizing the split-cycle concept, the engine when fully developed will reduce NOx emissions up to 80 percent and improve fuel efficiency by 50 percent, compared to a conventional gasoline engine. The engine requires one crankshaft revolution to complete a single combustion cycle and is projected to have higher torque, thermodynamic efficiency, and lower emissions than possible with today’s engines.