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Measured and Predicted Performance of a Downsized, Medium Duty, Natural Gas Engine
Technical Paper
2017-01-0775
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
With environmental policies becoming ever more stringent, there is heightened interest in natural gas (NG) as a viable fuel for medium to heavy duty engines. Typically, the industry has seen minor changes to the base engine when converting to run on NG, which, in turn historically provides degraded performance. In utilizing the positive properties of NG, Westport Fuel Systems has developed the High Efficiency Spark Ignition (HESI) combustion technology that has been shown to significantly improve performance. The HESI technology leverages a proven combustion system that is capable of generating a knock resistant charge motion while cooling the flame face. In conjunction with high boost for driving high pressure exhaust gas recirculation (EGR), this technology demonstrates the possibility for downsizing strategies while maintaining performance. Throughout HESI development, industry standard design, analysis, manufacturing, and testing processes have been applied on both medium and heavy duty engine architectures. In carrying over the bottom end of the donor engine, this technology is extremely adaptable for packaging and vehicle interfacing. Measured performance is compared with numerical predictions, meeting the pretest targets and showing a robust combustion process. When run with stoichiometric combustion, measured emission levels are in line with the California Air Resources Board optional low NOx standard of 0.020 g/hp-hr (0.027 g/kW-hr) with a passive three-way catalyst.
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Draper, R., Lenski, B., Foltz, F., Beazley, R. et al., "Measured and Predicted Performance of a Downsized, Medium Duty, Natural Gas Engine," SAE Technical Paper 2017-01-0775, 2017, https://doi.org/10.4271/2017-01-0775.Data Sets - Support Documents
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References
- Environmental Protection Agency and Department of Transportation National Highway Traffic Safety Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles - Phase 2 442 September 2016
- Code of Federal Regulations Greenhouse Gas Emission Standards Title 40, Article 1036.108
- Sun , X. , Lutz , A. , Vermiglio , E. , Arold , M. et al. The Development of the GM 2.2LCNG BI-Fuel Passenger Cars SAE Technical Paper 982445 1998 10.4271/982445
- Yun , Jeong-Eue , Lee , Jae-Joon A Study on Combine Effects between Swirl and Tumble Flow of Intake Port System in Cylinder Head F2000A094 June 2000
- Beazley , R. C. S. , Millward , P. C. , Tenny , W. D. Gaseous Fuel Combustion Apparatus for an Internal Combustion Engine International Patent: WO 2015/127522 A1 03 September 2015
- Schöffler , T. , Hoffmann , K. , and Koch , T. Stoichiometric Natural Gas Combustion in a Single Cylinder SI Engine and Impact of Charge Dilution by Means of EGR SAE Technical Paper 2013-24-0113 2013 10.4271/2013-24-0113
- Millward , P. C. DIRECT EXHAUST GAS RECIRCULATION SYSTEM International Patent: WO 2015/027335 A1 05 March 2015
- Richards , K. J. , Senecal , P. K. , Pomraning , E. CONVERGE (v2.3) Convergent Science Madison, WI 2015
- Soder , M. Numerical Investigation of Internal Combustion Engine Related Flows Technical Reports from Royal Institute of Technology June 2013
- Heywood , J. B. Internal Combustion Engine Fundamentals McGraw-Hill 1988