Experimental Investigation of Injection Strategies on Low Temperature Combustion Fuelled with Gasoline in a Compression Ignition Engine

The present study focuses on the experimental investigation on the effect of fuel injection strategies on LTC with gasoline on a single-cylinder CI engine. Firstly, the engine performance and emissions have been explored by sweeping SOI1 and split percentage for the load of 0.9 MPa IMEP at an engine speed of 1500 rpm. Then, the double-injection strategy has been tested for load expansion compared with single-injection. The results indicate that, with the fixed CA50, the peak HRR is reduced by advancing SOI1 and increasing split percentage gradually. Higher indicated thermal efficiency, as well as lower MPRR and COV, can be achieved simultaneously with later SOI1 and higher split percentage. As split percentage increases, emission decreases but soot emission increases. CO and THC emissions are increased by earlier SOI1, resulting in a slight decrease in combustion efficiency. Compared with single-injection, the double-injection strategy enables successful expansion of high-efficiency and clean combustion region, with increasing soot, CO, and THC emissions at high loads and slightly declining combustion efficiency and indicated thermal efficiency, however. MPRR and soot emission are considered to be the predominant constraints to the load expansion of gasoline LTC, and they are related to their trade-off relationship.

[1]  Bengt Johansson,et al.  Fuel Octane Effects in the Partially Premixed Combustion Regime in Compression Ignition Engines , 2009 .

[2]  Chao Jin,et al.  Progress in the production and application of n-butanol as a biofuel , 2011 .

[3]  Rolf D. Reitz,et al.  Operating a Heavy-Duty Direct-Injection Compression-Ignition Engine with Gasoline for Low Emissions , 2009 .

[4]  Zhi Wang,et al.  Fuel octane effects on gasoline multiple premixed compression ignition (MPCI) mode , 2013 .

[5]  Zunqing Zheng,et al.  Regulated and unregulated emissions from a compression ignition engine under low temperature combustion fuelled with gasoline and n-butanol/gasoline blends , 2014 .

[6]  Ingemar Denbratt,et al.  Low Soot, Low NOx in a Heavy Duty Diesel Engine Using High Levels of EGR , 2005 .

[7]  Paul C. Miles,et al.  The Influence of Charge Dilution and Injection Timing on Low-Temperature Diesel Combustion and Emissions , 2005 .

[8]  Guohong Tian,et al.  An experimental study of dieseline combustion in a direct injection engine , 2009 .

[9]  Rolf D. Reitz,et al.  A Study of the Effects of High EGR, High Equivalence Ratio, and Mixing Time on Emissions Levels in a Heavy-Duty Diesel Engine for PCCI Combustion , 2006 .

[10]  Hongsheng Guo,et al.  An experimental study on the formation of polycyclic aromatic hydrocarbons in laminar coflow non-premixed methane/air flames doped with four isomeric butanols , 2013 .

[11]  Xiaoye Han,et al.  Direct injection of neat n-butanol for enabling clean low temperature combustion in a modern diesel engine , 2015 .

[12]  Hans-Erik Ångström,et al.  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 , 2007 .

[13]  Nick Collings,et al.  Investigation into Partially Premixed Combustion in a Light-Duty Multi-Cylinder Diesel Engine Fuelled with a Mixture of Gasoline and Diesel , 2007 .

[14]  W. Marsden I and J , 2012 .

[15]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[16]  Mingfa Yao,et al.  Progress and recent trends in homogeneous charge compression ignition (HCCI) engines , 2009 .

[17]  S. Subramanian,et al.  An Experimental Investigation of Low Octane Gasoline in Diesel Engines , 2010 .

[18]  W. Ojeda,et al.  Development of a Fuel Injection Strategy for Partially Premixed Compression Ignition Combustion , 2009 .

[19]  Bengt Johansson,et al.  Gasoline partially premixed combustion, the future of internal combustion engines? , 2011 .

[20]  M. Zheng,et al.  Fuel suitability for low temperature combustion in compression ignition engines , 2013 .