Biodiesel is expected to become the main alternative fuel for transportation purposes in the comi... more Biodiesel is expected to become the main alternative fuel for transportation purposes in the coming future as a result of the recession of crude oil. The main advantage that makes biodiesel the first choice as a substitute for petroleum-based fuel is that biodiesel can be used in a compression ignition engine (CI) with minor modification. Unfortunately, with biodiesel, the engine experiences reductions in power and torque, and increases in fuel consumption and carbon deposits inside the combustion chamber mainly due to lower calorific value and heavier molecules present in the biodiesel. One of the solutions to minimize this problem is to increase the in-cylinder air motion and use this to break up the heavier molecules and mix these molecules with air. To achieve this, a high turbulent flow is required inside the cylinder. This paper presents the model of the Guide Vane Swirl and Tumble Device (GVSTD) to develop an organized in-cylinder turbulent flow. The basic model of GVSTD cons...
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2004
For a diesel engine, injection timing is a major parameter that sensitively a ects the engine per... more For a diesel engine, injection timing is a major parameter that sensitively a ects the engine performance, emission and durability. The physical and chemical properties of vegetable oils are known to be different from those of diesel. This study examines the changes in the behaviour of waste cooking oil (WCO) with changes in injection timing of a direct injection (DI) diesel engine, compared with those of diesel. The aspects taken into consideration were the effects of injection timing on combustion, performance and emissions. The results reveal that WCO and diesel responded identically to injection timing changes. To reduce NOx emission, one of the methods is to retard the injection timing from MBT timing. The engine used in this research follows this technique and had its original injection timing set at 15° before top dead centre (BTDC). With injection timing advanced by 4°, the engine produced better e ciency by 1.6 per cent for WCO and by 1.1 per cent for diesel, reduced CO emi...
Experimental study has been carried out to investigate performance parameters, emissions, cylinde... more Experimental study has been carried out to investigate performance parameters, emissions, cylinder pressure, exhaust gas temperature (Texhaust) and engine wall temperatures (Twall) for direct injection diesel engine. Tests were conducted for sunflower oil (S100) and 20% jojoba oil+80% pure diesel fuel (B20) in comparison to pure diesel fuel with different engine speeds. S100 and B20 were selected for the study
Biodiesel is expected to become the main alternative fuel for transportation purposes in the comi... more Biodiesel is expected to become the main alternative fuel for transportation purposes in the coming future as a result of the recession of crude oil. The main advantage that makes biodiesel the first choice as a substitute for petroleum-based fuel is that biodiesel can be used in a compression ignition engine (CI) with minor modification. Unfortunately, with biodiesel, the engine experiences reductions in power and torque, and increases in fuel consumption and carbon deposits inside the combustion chamber mainly due to lower calorific value and heavier molecules present in the biodiesel. One of the solutions to minimize this problem is to increase the in-cylinder air motion and use this to break up the heavier molecules and mix these molecules with air. To achieve this, a high turbulent flow is required inside the cylinder. This paper presents the model of the Guide Vane Swirl and Tumble Device (GVSTD) to develop an organized in-cylinder turbulent flow. The basic model of GVSTD cons...
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2004
For a diesel engine, injection timing is a major parameter that sensitively a ects the engine per... more For a diesel engine, injection timing is a major parameter that sensitively a ects the engine performance, emission and durability. The physical and chemical properties of vegetable oils are known to be different from those of diesel. This study examines the changes in the behaviour of waste cooking oil (WCO) with changes in injection timing of a direct injection (DI) diesel engine, compared with those of diesel. The aspects taken into consideration were the effects of injection timing on combustion, performance and emissions. The results reveal that WCO and diesel responded identically to injection timing changes. To reduce NOx emission, one of the methods is to retard the injection timing from MBT timing. The engine used in this research follows this technique and had its original injection timing set at 15° before top dead centre (BTDC). With injection timing advanced by 4°, the engine produced better e ciency by 1.6 per cent for WCO and by 1.1 per cent for diesel, reduced CO emi...
Experimental study has been carried out to investigate performance parameters, emissions, cylinde... more Experimental study has been carried out to investigate performance parameters, emissions, cylinder pressure, exhaust gas temperature (Texhaust) and engine wall temperatures (Twall) for direct injection diesel engine. Tests were conducted for sunflower oil (S100) and 20% jojoba oil+80% pure diesel fuel (B20) in comparison to pure diesel fuel with different engine speeds. S100 and B20 were selected for the study
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Papers by Saiful Bari