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Fuel Factors Affecting the High-Load Limit of a Temperature Stratified Controlled Auto-Ignition Engine
Technical Paper
2014-01-1287
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Factors affecting the pressure rise rate, and consequently the high-load limit, in the sequential ignition of a homogeneous charge in a temperature gradient have been identified. The pressure rise rate decreases with an increase in the magnitude of the temperature gradient and an increase in the sensitivity of the constant volume ignition delay time to temperature. It increases with an increase in the intrinsic reaction rate (i.e., the reaction rate for a charge of uniform composition and temperature). Since the ignition delay time and the intrinsic reaction rate are directly related to fuel properties, the high-load limit is sensitive to fuel selection.
The above three factors are used to explain the high-load limit obtained from a knock limited Controlled Auto-Ignition (CAI) engine with a homogeneous charge operating with three different fuels. The fuel comparisons are made with the engine operating at the same combustion phasing. The fuel ignition delay time and intrinsic heat release rate have been characterized in a Rapid Compression Machine (RCM). Depending on the operating condition, the ranking of the fuel is explained by different factors. As a result, the role of fuel in determining the high-load limit is complex.
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Citation
Maria, A., Cheng, W., Cannella, W., and Kar, K., "Fuel Factors Affecting the High-Load Limit of a Temperature Stratified Controlled Auto-Ignition Engine," SAE Technical Paper 2014-01-1287, 2014, https://doi.org/10.4271/2014-01-1287.Also In
References
- Zhao , F. , Assanis , D. Homogeneous Charge Compression Ignition (HCCI) Engines Society of Automotive Engineers, Inc. Warrendale, PA 978-0-7680-1123-4 2003 10.4271/PT-94
- Yelvington , P. and Green , W. Prediction of the Knock Limit and Viable Operating Range for a Homogeneous-Charge Compression-Ignition (HCCI) Engine SAE Technical Paper 2003-01-1092 2003 10.4271/2003-01-1092
- Sjöberg , M. , Dec , J. , Babajimopoulos , A. , and Assanis , D. Comparing Enhanced Natural Thermal Stratification Against Retarded Combustion Phasing for Smoothing of HCCI Heat-Release Rates SAE Technical Paper 2004-01-2994 2004 10.4271/2004-01-2994
- Wildman , C. High Load Limits of the Controlled Autoignition Engine Ph.D. Thesis Dept. of Mech. Eng., MIT 2009
- Scaringe , R. Extension of the High Load Limit in the Homogenous Charge Compression Ignition Engine Ph.D. Thesis Dept. of Mech. Eng., MIT 2009
- Dec , J. and Yang , Y. Boosted HCCI for High Power without Engine Knock and with Ultra-Low NOx Emissions - using Conventional Gasoline SAE Int. J. Engines 3 1 750 767 2010 10.4271/2010-01-1086
- Scaringe , R. , Wildman , C. , and Cheng , W. On the High Load Limit of Boosted Gasoline HCCI Engine Operating in NVO Mode SAE Int. J. Engines 3 1 35 45 2010 10.4271/2010-01-0162
- Krasselt , J. , Foster , D. , Ghandhi , J. , Herold , R. et al. Investigations into the Effects of Thermal and Compositional Stratification on HCCI Combustion - Part I: Metal Engine Results SAE Technical Paper 2009-01-1105 2009 10.4271/2009-01-1105
- Smallbone , A. , Morgan , N. , Bhave , A. , Kraft , M. et al. Simulating Combustion of Practical Fuels and Blends for Modern Engine Applications Using Detailed Chemical Kinetics SAE Technical Paper 2010-01-0572 2010 10.4271/2010-01-0572
- Kalghatgi , G. Fuel Anti-Knock Quality - Part I. Engine Studies SAE Technical Paper 2001-01-3584 2001 10.4271/2001-01-3584
- Eng , J. Characterization of Pressure Waves in HCCI Combustion SAE Technical Paper 2002-01-2859 2002 10.4271/2002-01-2859
- Mitsubishi Engine F9Q Series Mitsubishi Motor Corporation 2000
- Kitsopanidis , I. Experimental and Computational Study of Soot Formation Under Diesel Engine Conditions Ph.D. Thesis Dept. of Mech. Eng., MIT 2004