International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Most important of fuel economy research and vehicle industry today is to find a unique fuel with high calorific value and low tail pipe emissions . in this research a good effort was spent to find a solution for automotive industry by presenting a new fuel which was extracted from Citrullus and presented as handle seeds oil to be used as bio fuel in internal combustion engine, which is very important issue for automotive industry . The importance of extracting Handel oil has led to investigate the characteristics of chemical and physical properties of new fuel, such as density, specific gravity, kinematic viscosity, flash point, pour point, cloud point, which will help of controlling the composition of biofuel and improve the fuel quality which can be used in internal combustion engines . The two important processes were used for biodiesel production are Esterification and Transesterification.

Impact of changing compression ratio by varying the combustion chamber geometry on the engine performance was investigated, SI single cylinder air-cooled engine fuelled with unleaded gasoline and pure ethanol was used. These tests were conducted on three different compression ratios of, 7:1 8.5:1, and 10:1 with a wide-open throttle, and three different ignition timing, before and after top died centre. . The results showed that the BMEP (brake mean effective pressure), BTE (brake thermal efficiency), and BSFC (brake specific fuel consumption) obtained with the use of gasoline blends at all CRs were generally increased when they were compared to those of pure gasoline. In general, ethanol provided a lower exhaust emission compared to gasoline’s emissions at all CRs. Furthermore NOx emissions was affected much more than other exhaust emissions when changing the compression ratios compared to un leaded gasoline © 2018 The Authors. Published by Elsevier Ltd.
Peer-review under responsibility of the organizing committee of ICEER 2018

HCCI , SI HYDROARBONE SPECIATION GDIA qualitative and quantitative analysis of toxic but currently non-regulated hydrocarbon chemical species ranging from C5 – C11 was studded which is generated from a modern gasoline direct injection (GDI) engine by using gas chromatography-mass spectrometry (GC – MS). The GDI engine has been operated under different engine speeds and different engine modes (SI and HCCI modes). HCCI has the ability to operate on lean combustion which leads to the reduction in engine pumping losses, and fuel consumption However, HCCI mode has a high levels of unburnt HCs which leads to present heavier species such as Toluene, which is presented in higher concentrations under stoichiometric HCCI engine operation mode, while species such as , benzene, are mainly found in the engine exhaust during SI engine operation, Engine speeds has high impact on engine tail pipe emissions for both engine modes.. increasing engine speed leads to higher concentration in
Benzene species while toluene was decreased and presented in higher concentration at low engine speed for both engine modes.