Effects of Fuel Injection Timing on Combustion Characteristics of Biodiesel Blend Oil in Diesel Engine

Abstract

Abstract：Recently we have a growing interest in environmental pollution and alternative energy. Diesel engine is generally used to produce the power on the ground and the sea. However, the combustion characteristics are changed on account of the wear of fuel system and the altered ambient condition of the combustion chamber by the increment of the engine operation hour. Therefore combustion characteristics on fuel injection timing are experimentally investigated to find out the optimum fuel injection timing in the case of the aged diesel engine using biodiesel blend oil. Cylinder pressure, rate of pressure rise, rate of heat release and combustion gas temperature are risen by the advancing fuel injection timing, while the exhaust gas temperature and soot emission level are decreased by the advancing of fuel injection timing. The least specific fuel oil consumption is indicated at BTDC 26 〬 CA on the 75%load and at 1800rpm.

Emission Characteristics under Diesel and Biodiesel Fueled Compression Ignition Engine with Various Injector Holes and EGR Conditions

“…In comparison, biodiesel oil B20 caused an average decrease of 2%. Lim et al [14] experimentally investigated the combustion properties to the timing of the fuel injection, to specify the optimum fuel injection time for an engine speed of 1800 rpm when using a mixture of biodiesel oil and diesel. A 20-year-old diesel engine was used for the study, and they reported that the maximum heat generation rate at BTDC = 24 • C was 6.77% higher than that at BTDC = 22 • C, 24.25% higher than that at BTDC = 26 • C, and 31.13% higher than that at BTDC = 28 • C. Sanli et al [15] investigated the potential usage of methane and hydrogen-enriched methane in a turbocharged common rail direct injection diesel engine.…”

Study of behavior characteristics of diesel fuel spray according to breakup models

“…The study on the combustion and the emission characteristics according to the application of jatropha biodiesel has been conducted (Ganapathy, et al, 2011), and the study on the emission characteristics has been conducted by changing the fuel injection timing and the mode of combustion chamber (Jaichandar, et al, 2011). In addition, the study on the combustion and the emission characteristics after spraying has been conducted by applying the fuel for biodiesel to the common-rail diesel engine (Jeong, et al, 2011), and the study on the combustion characteristics according to control of the fuel injection timing has been conducted by applying the biodiesel to existing diesel engine (Lim and Cho, 2012). The desirable complete combustion in the engine means the combustion making in the form that the reactant does not occur the oxidation any more, so the improvement of atomization of the injection fuel applying the high-pressure injection is important.…”