SCUDERI SPLIT CYCLE I.C. ENGINE BY MANISH KUMAR

INTRODUCTION The Scuderi Engine is a split cycle, internal combustion engine invented by Carmelo J. Scuderi (1925 - 2002) Scuderi Group, an engineering and licensing company based in West Springfield, Massachusetts , is testing a working prototype of the engine that was officially unveiled to the public on April 20, 2009. Scuderi Engine shows gains in efficiency and reduced toxic emissions over conventional four-stroke Otto cycle designs It utilizes a unique combustion process referred to as “Firing After Top Dead Center.” This produces a highly efficient and clean-burning combustion process

DESIGN FEATURES It has two cylinder to split the cycle One cylinder is used for intake and compression Another is used for power and exhaust And a crossover passage is used to interconnect these cylinders One power stroke for each revolution of crank shaft Fuel Injector Crossover Passage Intake Exhaust Power/Exhaust Intake/ Compression

WORKING The engine uses pairs of cylinders operating in parallel to split the typical 4-stroke cycle into pairs of two strokes. The first cylinder handles the intake and compression strokes with only air coming in. the air is compressed before a crossover valve is opened allowing the compressed air to pass over to the power side. A pair of poppet valves manage the flow of compressed air to flow from the compression to the power cylinder. However, because of the high pressures being generated, approximately 50 BAR, Scuderi set the crossover valves to be outward opening. direct injection systems sprays fuel into the cross over passage and the high pressure air causes it to mix more thoroughly than a conventional engine.

The fuel being ignited after the power piston passes top dead center The fuel being ignited after the power piston passes top dead center. Firing the spark plug after TDC prevents any re-compression of the expanding gases The cylinder pressure rises to about 65 BAR during ignition but drops as the piston moves down the cylinder. The result is that the combustion temperature actually drops at the same time, eliminating about 80 percent of NOx production. Crossover Passage Intake Exhaust Power/Exhaust Intake/ Compression

The Scuderi Air-Hybrid System Unlike electric hybrids that use recovered kinetic energy to charge high-voltage batteries, Air-Hybrid system uses kinetic energy to charge an air storage tank. The Scuderi Air-Hybrid Engine takes one-third the time to store energy than it does to use all of that energy, which could potentially make it the most efficient hybrid system Air Tank

Modes of Operation Normal Operating Mode: The air tank stores energy, in the form of compressed air, which is normally lost during the operation of the vehicle, and uses it for combustion. Regenerative Braking Mode: By turning off the power cylinder and diverting the flow of compressed air to the storage tank, the momentum of the vehicle continues turning the engine, thereby compressing air and storing it in the tank for later use.

Cruising Mode: Only a portion of the compression cylinder’s charge is sent to the power cylinder during cruising mode. The remainder of the charge is sent to the air storage tank for later use. Whenever the air tank is full, the compression cylinder shuts off, and the vehicle operates in high-efficiency mode. High-Efficiency Mode: By turning off the compression cylinder and utilizing high-pressure air from the storage tank to supply the power cylinder, losses due to compression are reduced to nearly zero when operating in the high-efficiency mode.

Benefits of Air Hybrid System Reduces CO2 Emissions by up to 50% Reduces NOx Emissions by up to 80% Increases Fuel Efficiency by up to 50% No High-Voltage System / Batteries Positive Recharge Time Minimal Retooling Costs

The Scuderi Engine with Turbocharger As we know that the compression stroke is negative work, or energy that the engine consumes to create mechanical work. By incorporating turbocharger into engine, the size of the compression cylinder can be reduced to eliminate some negative compression work Air Tank Turbocharger Less Work Here More Work Here

STATICS

CONCLUSION The Most Significant Advancement in internal combustion engine after invention of Otto cycle Dramatic Reduction in fuel consumption and CO2 emissions Lowers NOx Up to 80% Delivers more power and torque