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An Overexpanded Two-Stroke Constant-Pressure Cycle for Developing Fuel Efficient and Low Emission Engines
Technical Paper
2007-01-0252
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A new overexpanded two-stroke constant-pressure engine cycle (the “OTCP Cycle”) has been developed to achieve the twin goals of lower engine out emissions while at the same time achieving increased fuel economy. A low-temperature combustion process lowers engine out NOx emissions. A high expansion ratio provides increased thermal efficiency for greater fuel economy. A two-stroke configuration provides a large power density for reducing mechanical losses per unit power.
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Citation
Pien, P., "An Overexpanded Two-Stroke Constant-Pressure Cycle for Developing Fuel Efficient and Low Emission Engines," SAE Technical Paper 2007-01-0252, 2007, https://doi.org/10.4271/2007-01-0252.Also In
New SI Engine and Component Design and Engine Lubrication and Bearing Systems
Number: SP-2093; Published: 2007-04-16
Number: SP-2093; Published: 2007-04-16
References
- Flynn P.F. Westbrook C.K. etc. “The Inevitability of Engine-Out NOx Emissions from Spark-Ignition and Diesel Engines”
- Akihama Kazuhito etc. “Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature” SAE Paper 2001-01-0655
- Pien Pao Chi “A Composite Two Stroke Cycle as a Platform for Developing a New Class of Two-Stroke Internal Combustion Engines” SAE Paper 2005-01-3447