Yazar "Ozdalyan, B." seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Combustion analysis of a two stroke reverse-uniflow gasoline engine
    (Turkish Society for Thermal Science and Technology, 2017) Kaya, G.; Ozdalyan, B.
    Most of the studies conducted on reverse-uniflow type scavenging method developed in order to remove the deficiencies of the Schnürle type two stroke engines are related with developing flow processes and determining engine performance. Until today, no studies related with combustion characteristics of these engines were published. In this study, a real time combustion analysis system was experimentally applied to a two stroke reverse-uniflow engine for online analysis of the combustion values and gathering data. The experiments were conducted under full load, 1800 1/min and by changing ignition timing before TDC between 16-24 ºCA by steps of 4 units each and accordingly cylinder pressure, mass fraction burned profile, heat release rate and indicated efficiency changes were examined. The analysis of this data allows the determination of ideal combustion phase providing maximum indicated efficiency. The performed tests show that most ideal combustion phase was obtained by adjusting the ignition timing to 20 ºCA before TDC. © 2017 TIBTD Printed in Turkey.
  • Küçük Resim Yok
    Öğe
    Development of a slip control anti-lock braking system model
    (Korean Soc Automotive Engineers, 2008) Ozdalyan, B.
    This paper describes the initial phase of work carried out as part of an on going study investigating the interaction between the tyre, suspension system and an antilock braking system (ABS). The modelling, analysis simulations and integration of results have been performed using an industry standard Multibody Systems Analysis (MBS) program. A quarter vehicle model has been used together with an individual front suspension system represented by interconnected rigid bodies. The tyre model used can be integrated into vehicle handling simulations but only the theory associated with the generation of longitudinal braking forces is described here. An ABS model based on slip control has been used to formulate the braking forces described in this paper. The simulations, which have been performed braking on wet and dry road surfaces, compare the performance of two different tyres.
  • Küçük Resim Yok
    Öğe
    The effect using n-butanol-diesel fuel blends at different injection pressures on the performance and emissions of diesel engines
    (2012) Ozdalyan, B.
    Alcohol, produced from biomass, is used in diesel engines to improve emission. In this study, the effect of adding 3%, 5%, 8%, and 10% (in volume) n-butanol to diesel fuel on the exhaust emission and fuel consumption was investigated on a single cylinder, four-stroke, compression-ignition engine with direct injection. Engine experiments were conducted at full load and at 2400 1/min of engine speed. Tests were repeated for injection pressures of 160, 180, 200 (original pressure), 220, and 240 bar in order to observe the effect injection pressure on the engine. Adding n-butanol to the diesel fuel at small ratios decreased CO, NO x, and soot emissions. The optimum injection pressure in terms of brake specific fuel consumption, CO, HC, and soot emission was determined as 220 bar. © Sila Science.
  • Küçük Resim Yok
    Öğe
    The usage of hydrogen for improving emissions and fuel consumption in a small gasoline engine
    (2011) Kosar, M.; Ozdalyan, B.; Celik, M.B.
    As small gasoline engines run on slightly rich mixture, and do not have catalytic converter, their specific fuel consumption and emission values are very high. When the gasoline engines are operated with pure hydrogen, NO x emissions increase and the backfire occurs. In this study, a small engine was run with hydrogen at a suitable lean mixture without occurring backfire, and improvements on fuel consumption and emissions were aimed. Performance, emissions and cylinder pressures of the engine were measured for hydrogen and gasoline. The specific fuel consumption and NO x emissions were reduced by about 57% and 66%, respectively at hydrogen operation. Moreover, the values near zero for CO, CO 2 and HC emissions were obtained. The test results showed that the small gasoline engine can operate with pure hydrogen at a suitable lean mixture without any backfire, and provide important improvements in emissions and fuel consumption without using any exhaust control system, electronic ignition system and fuel injection system which increase cost of engine. ©2008 TIBTD Printed in Turkey.