Experimental investigation on the influences of exhaust gas recirculation coupling with intake tumble on gasoline engine economy and emission performance

Abstract To improve the economy and emission performance of gasoline engine under part load, the approach of exhaust gas recirculation coupling with intake tumble was investigated by bench testing. Based on a naturally aspirated gasoline engine, the sweeping test of exhaust gas recirculation rate was conducted in two intake modes (with/without intake tumble), and the parameters related to engine heat-work conversion process and emission performance were measured. Through comparing and analyzing the measured data, the effects of exhaust gas recirculation coupling with intake tumble on gasoline engine economy and emission performance were revealed. The results show that pumping loss decreases gradually while in-cylinder residual gas fraction increases linearly with the exhaust gas recirculation rate increasing; the high-pressure cycle efficiency ascends with exhaust gas recirculation rate increasing due to the decrease of heat transfer loss and exhaust gas energy loss. Thus, the improvement of indicated thermal efficiency is the superposition of double benefits of low-pressure cycle and high-pressure cycle. At 1600 r/min and 2.94 bar, the indicated thermal efficiency can be increased by 4.29%. With the increase of exhaust gas recirculation rate, nitrogen oxide emissions almost fall linearly, but hydrocarbon and carbonic oxide emissions have no obvious change in the effective range of exhaust gas recirculation rate. The biggest advantage of intake tumble is that it can extend the effective range of exhaust gas recirculation rate. As a result, the potential of energy conservation and emission reduction of exhaust gas recirculation is largely improved.

[1]  Ming Jia,et al.  Effects of tumble combined with EGR (exhaust gas recirculation) on the combustion and emissions in a spark ignition engine at part loads , 2014 .

[2]  Dan Zhao,et al.  Control of combustion instability with a tunable Helmholtz resonator , 2015 .

[3]  Roussos G. Papagiannakis,et al.  Study of air inlet preheating and EGR impacts for improving the operation of compression ignition engine running under dual fuel mode , 2013 .

[4]  Jingping Liu,et al.  The influences of pressure and temperature on laminar flame propagations of n-butanol, iso-octane and their blends , 2014 .

[5]  Dan Zhao,et al.  Unity maximum transient energy growth of heat-driven acoustic oscillations , 2016 .

[6]  Daming Zhang,et al.  Experimental study on SI engine fuelled with butanol–gasoline blend and H2O addition , 2013 .

[7]  Yi Wang,et al.  Numerical study and correlation development on laminar burning velocities of n-butanol, iso-octane and their blends: Focusing on diluent and blend ratio effects , 2014 .

[8]  Habib Gürbüz,et al.  An investigation on effect of in-cylinder swirl flow on performance, combustion and cyclic variations in hydrogen fuelled spark ignition engine , 2014 .

[9]  Hakan Ozcan,et al.  Thermal balance of a LPG fuelled, four stroke SI engine with water addition , 2006 .

[10]  Charles E. Roberts,et al.  Cooled exhaust-gas recirculation for fuel economy and emissions improvement in gasoline engines , 2011 .

[11]  Dan Zhao,et al.  Nonorthogonality analysis of a thermoacoustic system with a premixed V-shaped flame , 2014 .

[12]  Alasdair Cairns,et al.  The Effects of Combined Internal and External Exhaust Gas Recirculation on Gasoline Controlled Auto-Ignition , 2005 .

[13]  Dan Zhao,et al.  Performance of small-scale bladeless electromagnetic energy harvesters driven by water or air , 2014 .

[14]  Hans-Erik Ångström,et al.  Replacing Fuel Enrichment in a Turbo Charged SI Engine: Lean Burn or Cooled EGR , 1999 .

[15]  Jingping Liu,et al.  Influences on Combustion Characteristics and Performances of EGR vs. Lean Burn in a Gasoline Engine , 2013 .

[16]  Zhijun Li,et al.  Effect of exhaust gases of Exhaust Gas Recirculation (EGR) coupling lean-burn gasoline engine on NOx purification of Lean NOx trap (LNT) , 2017 .

[17]  Javier Monsalve-Serrano,et al.  Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels , 2015 .

[18]  Taib Iskandar Mohamad,et al.  Part-load performance and emissions of a spark ignition engine fueled with RON95 and RON97 gasoline: Technical viewpoint on Malaysia's fuel price debate , 2014 .

[19]  Tie Li,et al.  Thermodynamic analysis of EGR effects on the first and second law efficiencies of a boosted spark-ignited direct-injection gasoline engine , 2013 .

[20]  Natthawud Dussadee,et al.  Performance and emissions of a modified small engine operated on producer gas , 2015 .

[21]  Jingping Liu,et al.  Numerical simulation coupling with experimental study on the non-uniform of each cylinder gas exchange and working processes of a multi-cylinder gasoline engine under transient conditions , 2016 .

[22]  Dan Zhao,et al.  Transient growth of flow disturbances in triggering a Rijke tube combustion instability , 2012 .

[23]  Dan Zhao,et al.  Energy harvesting from self-sustained aeroelastic limit cycle oscillations of rectangular wings , 2014 .

[24]  Dan Zhao,et al.  Entropy-involved energy measure study of intrinsic thermoacoustic oscillations , 2016 .

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

[26]  A. Dhole,et al.  Investigations on the combustion duration and ignition delay period of a dual fuel diesel engine with hydrogen and producer gas as secondary fuels , 2016 .

[27]  Habib Gürbüz.  Parametrical Investigation of Heat Transfer with Fast Response Thermocouple in SI Engine , 2016 .

[28]  Dan Zhao,et al.  Minimizing transient energy growth of nonlinear thermoacoustic oscillations , 2015 .

[29]  Orhan Durgun,et al.  Theoretical investigation of heat balance in direct injection (DI) diesel engines for neat diesel fuel and gasoline fumigation , 2009 .

[30]  Zhong-chang Liu,et al.  Experimental and theoretical analysis of effects of N2, O2 and Ar in excess air on combustion and NOx emissions of a turbocharged NG engine , 2015 .

[31]  Jaime Rubio Hervas,et al.  Linear-Quadratic-Gaussian Control of Rijke-Type Combustion Instability , 2014 .

[32]  S. Khalilarya,et al.  A numerical investigation on the influence of EGR in a supercharged SI engine fueled with gasoline and alternative fuels , 2014 .

[33]  Gequn Shu,et al.  Gasoline engine exhaust gas recirculation – A review , 2012 .

[34]  Dan Zhao,et al.  Waste thermal energy harvesting from a convection-driven Rijke–Zhao thermo-acoustic-piezo system , 2013 .

[35]  Dan Zhao,et al.  Thermoacoustic instability of a laminar premixed flame in Rijke tube with a hydrodynamic region , 2013 .

[36]  Fabio Bozza,et al.  Potentials of cooled EGR and water injection for knock resistance and fuel consumption improvements of gasoline engines , 2016 .

[37]  M. D. Checkel,et al.  The influence of Exhaust Gas Recirculation (EGR) on combustion and emissions of n-heptane/natural gas fueled Homogeneous Charge Compression Ignition (HCCI) engines , 2011 .

[38]  Dan Zhao,et al.  Feedback Control of Combustion Instabilities Using a Helmholtz Resonator with an Oscillating Volume , 2012 .

[39]  John B. Heywood,et al.  Effects of Hydrogen Enhancement on Efficiency and NOx Emissions of Lean and EGR-Diluted Mixtures in a SI Engine , 2005 .

[40]  G. Abd-Alla,et al.  Using exhaust gas recirculation in internal combustion engines: a review , 2002 .

[41]  Zhong-chang Liu,et al.  Experimental investigation of the thermal and diluent effects of EGR components on combustion and NOx emissions of a turbocharged natural gas SI engine , 2014 .

[42]  Yong Wang,et al.  Energy and exergy analysis on gasoline engine based on mapping characteristics experiment , 2013 .

[43]  Dan Zhao,et al.  Combustion Instabilities in a Bifurcating Tube: Open- and Closed-Loop Measurements , 2014 .

[44]  G. Shu,et al.  Influence of EGR and oxygen-enriched air on diesel engine NO–Smoke emission and combustion characteristic , 2013 .