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Successful Testing of Valve Train Rig for Scuderi Split-Cycle Engine
17 April 2008
Initial results from the testing of a valve train test rig for the Scuderi Split-Cycle Engine (earlier post) by Southwest Research Institute (SwRI) almost completely matched initial computer predictions, according to the Scuderi Group.
The Scuderi Split-Cycle Engine 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 gas passage includes a set of uniquely timed valves, which maintain a pre-charged pressure through all four strokes of the cycle.
The compressed air charge pours into the combustion cylinder at 50 bar pressure with massive turbulence, rapidly atomizing the fuel charge, which is injected only into the combustion cylinder.
The newly developed valve train test rig is designed to fully actuate, test and measure all performance criteria of the Scuderi Engine’s crossover valve train sub-assembly prior to the final assembly of the first Scuderi Engine prototype.
The valve train on the Scuderi Engine has been one of the most scrutinized features of the engine since our debut here at SAE World Congress two years ago. The valve train test rig simulates every aspect of the engine’s environment, minus the heat of combustion. Therefore the laboratory was able to fully actuate the crossover valves at all engine speeds under all load conditions, and compare measured results to the computer-predicted performance data.
—Sal Scuderi, president of the Scuderi Group
An earlier report from SwRI predicted that the Scuderi Split-Cycle Engine under full-load (FL) conditions provides higher power, torque, and efficiency ratings than are currently attainable by the conventional turbocharged engines used in vehicles today. (Earlier post.)
Testing on the valve train test rig is expected to continue through the month of April.
April 17, 2008 in Brief | Permalink | Comments (5) | TrackBack (0)
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Comments
This is kind of an aside: Does anyone know how a the Scuderi Split-Cycle will effect engine balance? e.g. will a v6 still have balanced first and second order forces?
Posted by: Cornelius | Apr 17, 2008 3:59:21 AM
I do not know about balance, but I think that with the advent of series hybrids, we will see lots of different engines being used to gain efficiency. This company has a combined cycle power plant that may be a candidate.
http://tmapower.com/products.html
They claim 40% electrical efficiency from a combination brayton/rankine machine.
Posted by: sjc | Apr 17, 2008 7:52:39 AM
The key phrase is "minus the heat of combustion". Lots of engine designs look good until it is discovered they can't handle the "heat of Combustion". Until I see a Scuderi engined vehicle crossing the Alps with better performance than a diesel it is all just hype.
Posted by: tom deplume | Apr 18, 2008 11:04:48 AM
interesting
http://www.youtube.com/watch?v=_qPpLSHRNMU&feature=related
http://heetgasmodelbouw.ridders.nu/Webpaginas/pagina_scuderi_viertakt/scuderi_frameset.htm
Posted by: mikeb | Apr 20, 2008 5:23:33 PM
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Posted by: gequplfmi vkhtefqgs | May 14, 2008 12:05:36 PM
