Experimental Investigations To Improve The Performance Emission And Combustion Characteristics Of Safflower Neem And Corn Oil Biodiesels With Acetylene Induction In A Ci Engine

Abstract

Renewable fuels are desirable as alternate fuels with ignition quality equivalent to diesel and its combustion parameters, but unsuitable for direct operation in diesel engines as fuel because of their higher viscosity and density. Hence, the fuel and engine-based modifications are being developed to improve the performance, emission, and combustion characteristics of the compression ignition engines. The higher viscosity of fuel oil does not let it to vaporize even after it is being injected into the combustion chamber. Therefore, converting the higher viscosity of vegetable oil into biodiesel improves the atomization resulting in better combustion. The experimental works were carried out in a single-cylinder four-stroke CI engine run with various biodiesels such as safflower oil methyl ester (SME), neem oil methyl ester (NOME), and corn oil methyl esters (COME). newline newline newlineIn this research work, safflower, neem, and corn oil are used as a primary fuel and the effect of acetylene induction into the intake manifold with safflower biodiesel (SME) neem biodiesel (NOME), and corn biodiesel (COME) as fuel in a single cylinder Compression Ignition (CI) engine. Acetylene was inducted along with intake air into the inlet manifold at various mass shares with diesel and above- mentioned biodiesels. newline newline newlineThe experiments were conducted at variable load conditions with a constant speed of 1500 rpm. The engine output was varied in steps from 25% to 100% loading under the single fuel mode. The engine newline newline newline newlineoutput was kept at 50% and 100% load for the dual fuel mode with acetylene induction. At each load, acetylene induction was varied till the engine knocks. At the operating point, fuel flow rate, air flow rate, exhaust temperature, emissions of CO, HC, NO, and smoke emission readings were recorded. Pressure crank angle data for a hundred consecutive cycles were recorded by the data acquisition system. newline newline newlineIn the first phase of research work test were performed with diesel, SME, NOME and COME. Test results rev