West Springfield, Massachusetts – Preliminary test results on a new engine design are showing as much as a 30 to 36 per cent decrease in fuel consumption, according to its designers. The Scuderi engine’s “split-cycle” design requires one crankshaft revolution to complete a single combustion cycle, resulting in higher torque, thermodynamic efficiency and lower emissions than current engines, the company said.

The results were based on projections generated from simulations of the Scuderi engine by the independent laboratory Southwest Research Institute. Computer models showed that a base, naturally-aspirated Scuderi engine operating in a 2004 Chevrolet Cavalier consumes 25 per cent less fuel, while a naturally-aspirated Scuderi Air-Hybrid consumes 30 to 36 per cent less fuel under similar drive conditions.

“These results are only going to get better,” said Sal Scuderi, president of Scuderi Group. “The naturally-aspirated Scuderi split-cycle engine will continue to improve when further optimized, and the Air-Hybrid performance will increase with higher air tank pressures. We expect the efficiencies to continue to climb as modifications are made and new simulations are conducted, including computer modelling of the 2011 Nissan Sentra running with a Scuderi engine.”

The Scuderi engine divides the four strokes of a combustion cycle among two paired cylinders. The left cylinder functions as an air compressor, handling intake and compression, while the right cylinder handles combustion and exhaust. The engine fires after top dead centre. Scuderi said that by optimizing the split-cycle concept, the engine when fully developed will reduce NOx emissions up to 80 per cent and improve fuel efficiency by 50 per cent when compared to a conventional gasoline engine.

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