Emission Behavior of a CI Engine Running by Biodiesel under Transient Conditions

1. ABSTRACT The emission characteristics of compression ignition (CI) engines running on biodiesel during transient operating conditions, which is the most usual case in urban and extra-urban transportation, have rarely been investigated. In the present study an experimental investigation on emission characteristics of a CI engine has been carried out both under steady state and transient operating conditions. The experimental work has been carried out on CI engine, which is integrated with transient testing facility. This facility is capable of varying the engine speed and load over a given time period. To measure the engine emissions, an emission analyser has been used to measure CO2, CO, THC, and NOx emissions. The fuels used in the analyses are 25% (25B) and 100% (100B) of biodiesel blend and diesel. The series of the transient events studied are speed changes from 900 to 1200rpm, 1200 to 1500rpm and 1500 to 1800rpm over a time period of 4 seconds each. These tests were performed at a constant load of 105Nm, 210Nm, 315Nm and 420Nm. The transient test results have shown that the emissions of CI engine running on biodiesel were reduced by up to 17%, 52% and 38% for CO, CO2 and THC emissions respectively as compared to diesel fuel. However, the NOx emission was seen to be 17% higher for engine running on biodiesel than that on diesel during transient conditions.

[1]  M. P. Dorado,et al.  EXHAUST EMISSIONS FROM A DIESEL ENGINE FUELED WITH TRANSESTERIFIED WASTE OLIVE OIL , 2003 .

[2]  M. D. Cardenas,et al.  Reduction of diesel smoke opacity from vegetable oil methyl esters during transient operation , 2006 .

[3]  S. Jayaraj,et al.  Performance and emission evaluation of a diesel engine fueled with methyl esters of rubber seed oil , 2005 .

[4]  Octavio Armas,et al.  Effect of biodiesel fuels on diesel engine emissions , 2008 .

[5]  J. Robert Mondt.  Cleaner Cars: The History and Technology of Emission Control Since the 1960s , 2000 .

[6]  Thomas D. Durbin,et al.  Effects of Biodiesel, Biodiesel Blends, and a Synthetic Diesel on Emissions from Light Heavy-Duty Diesel Vehicles , 2000 .

[7]  Robert L. McCormick,et al.  Combustion of fat and vegetable oil derived fuels in diesel engines , 1998 .

[8]  Cherng-Yuan Lin,et al.  Diesel engine performance and emission characteristics of biodiesel produced by the peroxidation process , 2006 .

[9]  Octavio Armas,et al.  Diesel emissions from biofuels derived from Spanish potential vegetable oils , 2005 .

[10]  Md. Nurun Nabi,et al.  Improvement of engine emissions with conventional diesel fuel and diesel-biodiesel blends. , 2006, Bioresource technology.

[11]  L. G. Schumacher,et al.  Engine Exhaust Emissions Evaluation of a Cummins L10E When Fueled with a Biodiesel Blend , 1995 .

[12]  M. Gambino,et al.  Emission comparison of urban bus engine fueled with diesel oil and 'biodiesel' blend. , 2004, The Science of the total environment.

[13]  J. V. Gerpen,et al.  The effect of biodiesel oxidation on engine performance and emissions , 2001 .

[14]  J. Gómezc,et al.  Exhaust emissions from a Diesel engine fueled with transesterified waste olive oil q , 2003 .

[15]  N. Clark,et al.  Emissions from nine heavy trucks fueled by diesel and biodiesel blend without engine modification , 2000 .