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Low Load Limit Extension for Gasoline Compression Ignition Using Negative Valve Overlap Strategy
Technical Paper
2018-01-0896
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Gasoline compression ignition (GCI) is widely studied for the benefits of simultaneous reduction in nitrogen oxide (NOX) and soot emissions without compromising the engine efficiency. Despite this advantage, the operational range for GCI is not widely expanded, as the auto-ignition of fuel at low load condition is difficult. The present study aims to extend the low load operational limit for GCI using negative valve overlap (NVO) strategy. The engine used for the current experimentation is a single cylinder diesel engine that runs at an idle speed of 800 rpm with a compression ratio of 17.3. The engine is operated at homogeneous charge compression ignition (HCCI) and partially premixed combustion (PPC) combustion modes with the corresponding start of injection (SOI) at −180 CAD (aTDC) and −30 CAD (aTDC), respectively. In the presented work, intake air temperature is used as control parameter to maintain combustion stability at idle and low load condition, while the intake air pressure is maintained at 1 bar (ambient). The engine is equipped with variable valve cam phasers that can phase both inlet and exhaust valves from the original timing. For the maximum cam phasing range (56 CAD) at a valve lift of 0.3 mm, the maximum allowable positive valve overlap was 20 CAD. In the present study, the exhaust cam is phased to 26 CAD and 6 CAD and the corresponding NVO is noted to be 10 CAD and 30 CAD, respectively. With exhaust cam phasing adjustment, the exhaust valve is closed early to retain hot residual gases inside the cylinder. As such, the in-cylinder temperature is increased and a reduction in the required intake air temperature to control combustion phasing is possible. For a constant combustion phasing of 3 CAD (aTDC), a minimum load of indicated mean effective pressure (IMEPnet) = 1 bar is attained for gasoline (RON = 91) at HCCI and PPC modes. The coefficient of variance was observed to below 5% at these idle and low load conditions. At the minimum load point, the intake air temperature required dropped by 20°C and 15°C for NVO = 30 CAD at HCCI and PPC modes, respectively, when compared to NVO = −20 CAD and NVO = 10 CAD. Similarly, for the load range of IMEPnet = 1 to 3 bar, decrease in temperature requirement is noted for negative valve overlap cases and the translational table in terms of d (Tin)/d (NVO) is attained. However, the low load limit was extended with negative valve overlap at the expense of decreased net indicated thermal efficiency due to heat losses and reduction in gas exchange efficiency. Ultra low soot concentration and NOX emission were noted at HCCI condition.
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Authors
- R. Vallinayagam - King Abdullah University of Science & Technology
- Abdullah S. AlRamadan - King Abdullah University of Science & Technology
- S Vedharaj - King Abdullah University of Science & Technology
- Yanzhao An - King Abdullah University of Science & Technology
- Jaeheon Sim - Saudi Aramco
- Junseok Chang - Saudi Aramco
- Bengt Johansson - King Abdullah University of Science & Technology
Citation
Vallinayagam, R., AlRamadan, A., Vedharaj, S., An, Y. et al., "Low Load Limit Extension for Gasoline Compression Ignition Using Negative Valve Overlap Strategy," SAE Technical Paper 2018-01-0896, 2018, https://doi.org/10.4271/2018-01-0896.Data Sets - Support Documents
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References
- Saxena , S. and Bedoya , I.D. Fundamental Phenomena Affecting Low Temperature Combustion and HCCI Engines, High Load Limits and Strategies for Extending These Limits Progress in Energy and Combustion Science 39 457 488 2013 10.1016/j.pecs.2013.05.002
- Reitz , R.D. and Duraisamy , G. Review of High Efficiency and Clean Reactivity Controlled Compression Ignition (RCCI) Combustion in Internal Combustion Engines Progress in Energy and Combustion Science 46 12 71 2015 10.1016/j.pecs.2014.05.003
- Vedharaj , S. , Vallinayagam , R. , An , Y. , Dawood , A. et al. Fuel Effect on Combustion Stratification in Partially Premixed Combustion SAE Technical Paper 2017-24-0089 2017 10.4271/2017-24-0089
- An , Y. , Jaasim , M. , Vallinayagam , R. , and Vedharaj , S. Numerical Simulation of Combustion and Soot Under Partially Premixed Combustion of Low-Octane Gasoline Fuel 211 420 431 2017 10.1016/j.fuel.2017.09.064
- Kalghatgi , G.T. , Risberg , P. , and Angstrom , H.-E. Partially Pre-mixed Auto-Ignition of Gasoline to Attain Low Smoke and Low NOx at High Load in a Compression Ignition Engine and Comparison with a Diesel Fuel SAE Technical Paper 2007-01-0006 2007 10.4271/2007-01-0006
- An , Y. , Jaasim , M. , Vallinayagam , R. , Im , H. G. et al. In-Cylinder Combustion and Soot Evolution in the Transition from Conventional Compression Ignition (CI) Mode to Partially Premixed Combustion (PPC) Mode Energy Fuel 2018 10.1021/acs.energyfuels.7b02535
- Hyvönen , J. , Haraldsson , G. , and Johansson , B. Operating Conditions Using Spark Assisted HCCI Combustion During Combustion Mode Transfer to SI in a Multi-Cylinder VCR-HCCI Engine SAE Technical Paper 2005-01-0109 2005 10.4271/2005-01-0109
- Manofsky , L. , Vavra , J. , Assanis , D.N. , and Babajimopoulos , A. Bridging the Gap Between HCCI and SI: Spark-Assisted Compression Ignition SAE Technical Paper 2011-01-1179 2011 10.4271/2011-01-1179
- Cinar , C. , Uyumaz , A. , Solmaz , H. , Sahin , F. et al. Effects of Intake Air Temperature on Combustion, Performance and Emission Characteristics of a HCCI Engine Fueled with the Blends of 20% N-Heptane and 80% Isooctane Fuels Fuel Processing Technology 130 275 281 2015 10.1016/j.fuproc.2014/10.026
- Woo , C. , Kook , S. , and Hawkes , E.R. Effect of Intake Air Temperature and Common-Rail Pressure on Ethanol Combustion in a Single-Cylinder Light-Duty Diesel Engine Fuel 180 9 19 2016 10.1016/j.fuel.2016.04.005
- Leermakers , C. , Bakker , P. , Nijssen , B. , Somers , L. et al. Low Octane Fuel Composition Effects on the Load Range Capability of Partially Premixed Combustion Fuel 135 210 222 2014 10.1016/j.fuel.2014.06.044
- Wang , S. , van der Waart , K. , Somers , B. , de Goey , P. Experimental Study on the Potential of Higher Octane Number Fuels for Low Load Partially Premixed Combustion SAE Technical Paper 2017-01-0750 2017 10.4271/2017-01-0750
- Manente , V. , Zander , C.-G. , Johansson , B. , Tunestal , P. et al. An Advanced Internal Combustion Engine Concept for Low Emissions and High Efficiency from Idle to Max Load Using Gasoline Partially Premixed Combustion SAE Technical Paper 2010-01-2198 2010 10.4271/2010-01-2198
- Vedharaj , S. , Vallinayagam , R. , An , Y. , Najafabadi , M.I. et al. Combustion Homogeneity and Emission Analysis During the Transition from CI to HCCI for FACE I Gasoline SAE Technical Paper 2017-01-2263 2017 10.4271/2017-01-2263
- An , Y. , Vallinayagam , R. , Vedharaj , S. , Masurier , J.-B. et al. Analysis of Transition from HCCI to CI via PPC with Low Octane Gasoline Fuels Using Optical Diagnostics and Soot Particle Analysis SAE Technical Paper 2017-01-2403 2017 10.4271/2017-01-2403
- Chang , J. , Kalghatgi , G. , Amer , A. , and Viollet , Y. Enabling High Efficiency Direct Injection Engine with Naphtha Fuel Through Partially Premixed Charge Compression Ignition Combustion SAE Technical Paper 2012-01-0677 2012 10.427/2012-01-0677
- Vallinayagam , R. , Vedharaj , S. , An , Y. , Dawood , A. et al. Combustion Stratification for Naphtha from CI Combustion to PPC SAE Technical Paper 2017-01-0745 2017 10.4271/2017-01-0745
- Chang , J. , Viollet , Y. , Amer , A. , and Kalghatgi , G. Fuel Economy Potential of Partially Premixed Compression Ignition (PPCI) Combustion with Naphtha Fuel SAE Technical Paper 2013-01-2701 10.4271/2013-01-2701
- Won , H.W. , Bouet , A. , Duffour , F. , and Francqueville , L. Naphtha Fuel on a Light Duty Single Cylinder Compression Ignition Engine with two Different Compression Ratios SAE Technical Paper 2016-01-2302 2016 10.4271/2016-01-2302
- Viollet , Y. , Chang , J. , and Kalghatgi , G. Compression Ratio and Derived Cetane Number Effects on Gasoline Compression Ignition Engine Running with Naphtha Fuels SAE International Journal of Fuels and Lubricants 7 412 426 2014 10.4271/2014-01-1301
- Sellnau , M. , Foster , M. , Hoyer , K. , Moore , W. et al. Development of a Gasoline Direct Injection Compression Ignition (GDCI) Engine SAE International Journal of Engines 7 835 851 2014 10.4271/2014-01-1300
- Sellnau , M. , Moore , W. , Sinnamon , J. , and Hoyer , K. GDCI Multi-Cylinder Engine for High Fuel Efficiency and Low Emissions SAE International Journal of Engines 8 775 790 2015 10.4271/2015-01-0834
- Sellnau , M. , Foster , M. , Moore , W. , and Sinnamon , J. Second Generation GDCI Multi-Cylinder Engine for High Fuel Efficiency and US Tier 3 Emissions SAE International Journal of Engines 9 1002 1020 2016 10.4271/2016-01-0760
- Borgqvist , P. , Tunestal , P. , and Johansson , B. Gasoline Partially Premixed Combustion in a Light Duty Engine at Low Load and Idle Operating Conditions SAE Technical Paper 2012-01-0687 2012 10.4271/2012-01-0687
- Borgqvist , P. , Andersson , Ö. , Tunestål , P. , and Johansson , B. The Low Load Limit of Gasoline Partially Premixed Combustion Using Negative Valve Overlap Journal of Engineering for Gas Turbines and Power 135 062002 2012 10.1115/1.4023613
- Borgqvist , P. , Tuner , M. , Mello , A. , and Tunestal , P. The Usefulness of Negative Valve Overlap for Gasoline Partially Premixed Combustion PPC SAE Technical Paper 2012-01-1578 2012 10.4271/2012-01-1578
- Borgqvist , P. , Tunestal , P. , and Johansson , B. Comparison of Negative Valve Overlap (NVO) and Rebreathing Valve Strategies on a Gasoline PPC Engine at Low Load and Idle Operating Conditions SAE International Journal of Engines 6 366 378 2013 10.4271/2013-01-0902
- Vallinayagam , R. , Vedharaj , S. , An , Y. , Dawood , A. et al. Compression Ignition of Light Naphtha and Its Multicomponent Surrogate Under Partially Premixed Conditions SAE Technical Paper 2017-24-0078 2017 10.4271/2017-24-0078
- Juttu , S. , Thipse , S. , Marathe , N. , and Babu , M.G. Homogeneous charge compression ignition (HCCI): a new concept for near zero NOx and particulate matter (PM) from diesel engine combustion SAE Technical Paper 2007-26-020 2007 10.4271/2007-26-020
- Vedharaj , S. , Vallinayagam , R. , Yang , W. , Chou , S. et al. Effect of Adding 1, 4-Dioxane with Kapok Biodiesel on the Characteristics of a Diesel Engine Applied Energy 136 1166 1173 2014 10.1016/j.apenergy.2014.04.012
- Shen , M. , Tuner , M. , Johansson , B. , and Cannella , W. Effects of EGR and Intake Pressure on PPC of Conventional Diesel, Gasoline and Ethanol in a Heavy Duty Diesel Engine SAE Technical Paper 2013-01-2707 2013 10.4271/2013-01-2707
- An , Y. , Vedharaj , S. , Vallinayagam , R. , Dawood , A. et al. Effect of Aromatics on Combustion Stratification and Particulate Emissions from Low Octane Gasoline Fuels in PPC and HCCI Mode SAE Technical Paper 2017-24-0086 2017 10.4271/2017-24-0086