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Scuderi Group to Present Preliminary Results on Air-Hybrid Study and Update on Scuderi Engine Prototype Testing at Washington Auto Show
16 January 2010
The Scuderi Group will present preliminary results from a study underway at independent lab SwRI on the performance and viability of the Scuderi Air-Hybrid (earlier post) at the upcoming Washington Auto Show in Washington, DC. The company will also provide an update on the progress of Scuderi Engine prototype testing at the event. Scuderi Group is in talks with or has NDAs with 14 of the world’s top 20 automakers, according to the company.
The basic Scuderi Engine is a split-cycle engine—it divides the four strokes of the Otto cycle over a paired combination of one compression cylinder and one power cylinder. Intake air is compressed in the compression cylinder and transferred via a gas passage to the power cylinder for combustion. The air-hybrid configuration adds a compressed air storage tank to the engine.
Early computer simulation studies show the Air-Hybrid achieves up to 50% more fuel efficiency than conventional engines while emitting up to 80% percent less toxins than any conventional engine on the road today. It would also be available at a much lower cost than an electric hybrid system.
|Scuderi Air-Hybrid Operating Modes. Click to enlarge.|
Scuderi Air Hybrid Operating Modes.
Normal Operating Mode: An Air-Tank stores wasted energy in the form of compressed air, and reuses the air to enhance the combustion process.
Regenerative Braking Mode: By turning off the power cylinder and diverting the flow of compressed air to the storage tank, the momentum continues turning the engine, thereby compressing air and storing it in the tank for later use.
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.
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.
|Preliminary Results from Scuderi Air-Hybrid Engine Study|
|Engine speed||Up to 6,000 rpm|
|Horsepower||Up to 140 hp/L|
|Efficiency (full load)||5-10% higher than conventional engine|
|Efficiency (part load)||25-50% higher than conventional engine|
|Emissions: NOx||Up to 80% less than conventional engine|
|Emissions: CO2||Up to 50% reduction compared to conventional engine|
|Air tank charging to discharge ratio||1:3|
|Air tank pressure||200 bar|
|Engine operating pressure||140 bar|
|Fuel injection pressure||Up to 200 bar|
|Brake Mean Effective Pressure (BMEP)||Up to 30 bar|
|Compression ration||75:1 - Compression side|
50:1 - Power side
|Displacement (approx. 1L)||.48 - Compression side|
.52 - Power side
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