Thermodynamic and dynamic modeling of a single cylinder four stroke diesel engine

Abstract In this study the conjugate thermodynamic and dynamic modeling of a single cylinder four-stroke diesel engine was conducted. The gas pressure in cylinder was calculated with the first law of the thermodynamic and the general state equation of the perfect gases. The variation of the heat, given to the working fluid during the heating process of the thermodynamic cycle, was modeled with the Gaussian function. The dynamic model of the engine consists of the motion equations of piston, conrod and crankshaft. Conrod motion was modeled by 2 translational and 1 angular motion equations. In the derivation of the motion equations, the Newton method was used. Motion equations involve hydrodynamic and asperity frictions as well as gas forces. By preparing a heat release rate profile consistent with ones given in the literature, thermal efficiency, knocking, vibration, torque and emission characteristics of the engine were investigated. The counterweight mass and its radial distance were optimized. At full load, if the heat release period is initiated soon after the piston passed the top dead center, the pressure rise rate becomes critical from the knocking point of view however, a couple of degree of retarding of the heat release period avoids the knocking without causing significant loss in thermal efficiency. If the throttling is more than 70%, the temperature of the combustion gas is high enough for NOx formation. At full load the vibrational torque exerting on the crankshaft was determined as about 17 times the engine torque.

[1]  Franck Vangraefschepe,et al.  Formation of Unburned Hydrocarbons in Low Temperature Diesel Combustion , 2009 .

[2]  G. Lakshmi Narayana Rao,et al.  Effect of Combustion Chamber Design on a DI Diesel Engine Fuelled with Jatropha Methyl Esters Blends with Diesel , 2013 .

[3]  Sajjad Emami,et al.  Effects of injection timing, before and after top dead center on the propulsion and power in a diesel engine , 2014 .

[4]  Dimitrios T. Hountalas,et al.  A general purpose diagnostic technique for marine diesel engines – Application on the main propulsion and auxiliary diesel units of a marine vessel , 2010 .

[5]  Oleg Spitsov.  Heat transfer inside internal combustion engine: modelling and comparison with experimental data , 2013 .

[6]  Meisam Tabatabaei,et al.  A novel soluble nano-catalysts in diesel–biodiesel fuel blends to improve diesel engines performance and reduce exhaust emissions , 2015 .

[7]  N. Buchanan,et al.  Internal-Combustion Engines , 1945 .

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

[9]  Dimitrios T. Hountalas,et al.  Theoretical study of the effects of pilot fuel quantity and its injection timing on the performance and emissions of a dual fuel diesel engine , 2007 .

[10]  Jun Kagawa,et al.  Health effects of diesel exhaust emissions--a mixture of air pollutants of worldwide concern. , 2002, Toxicology.

[11]  R. Cary,et al.  Elemental Carbon-Based Method for Monitoring Occupational Exposures to Particulate Diesel Exhaust , 1996 .

[12]  Hyung-Suk Han.  Analysis of fatigue failure on the keyway of the reduction gear input shaft connecting a diesel engine caused by torsional vibration , 2014 .

[13]  Mohamed Y. E. Selim,et al.  Pressure-time characteristics in diesel engine fueled with natural gas , 2001 .

[14]  Damon Honnery,et al.  Heat release model for the combustion of diesel oil emulsions in DI diesel engines , 2005 .

[15]  M. Canakci,et al.  Combustion characteristics of a turbocharged DI compression ignition engine fueled with petroleum diesel fuels and biodiesel. , 2007, Bioresource technology.

[16]  Halit Karabulut,et al.  Dynamic model of a two-cylinder four-stroke internal combustion engine and vibration treatment , 2012 .

[17]  H. Zhen,et al.  Effect of cetane number improver on heat release rate and emissions of high speed diesel engine fueled with ethanol–diesel blend fuel , 2004 .

[18]  D. Laforgia,et al.  Effects of Pilot Injection Parameters on Combustion for Common Rail Diesel Engines , 2003 .

[19]  Damon Honnery,et al.  Performance, emissions and heat release characteristics of direct injection diesel engine operating on diesel oil emulsion , 2006 .

[20]  Patricia A Stewart,et al.  Occupational exposure to diesel engine exhaust: A literature review , 2009, Journal of Exposure Science and Environmental Epidemiology.

[21]  Liu Shenghua,et al.  A new diesel oxygenate additive and its effects on engine combustion and emissions , 2007 .

[22]  A. Murugesan,et al.  Bio-diesel as an alternative fuel for diesel engines—A review , 2009 .

[23]  Francine Laden,et al.  Lung Cancer in Railroad Workers Exposed to Diesel Exhaust , 2004, Environmental health perspectives.

[24]  Brian Stone,et al.  The effect of piston friction on engine block dynamics , 2007 .

[25]  Seong Hyuk Lee,et al.  Modeling of diesel spray impingement on a flat wall , 2000 .

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

[27]  Fabian Mauss,et al.  Supercharged Homogeneous Charge Compression Ignition , 1998 .

[28]  K. Annamalai,et al.  Combined effect of injection timing and combustion chamber geometry on the performance of a biodiesel fueled diesel engine , 2012 .

[29]  A. S. Mendes,et al.  Analysis of torsional vibration in internal combustion engines: Modelling and experimental validation , 2008 .

[30]  Michael Boot,et al.  Spray Impingement in the Early Direct Injection Premixed Charge Compression Ignition Regime , 2010 .

[31]  Lakmal Seneviratne,et al.  Diesel Engine Indicated and Load Torque Estimation Using a Non-Linear Observer , 2006 .

[32]  Usman Asad,et al.  Fast heat release characterization of a diesel engine , 2008 .

[33]  Lakmal Seneviratne,et al.  Dynamic simulation of a single-cylinder diesel engine including dynamometer modelling and friction , 1999 .

[34]  Sotirios Natsiavas,et al.  Linear and nonlinear dynamics of reciprocating engines , 2003 .