Yazar "Uyumaz, Ahmet" için Scopus İndeksli Yayınlar Koleksiyonu listeleme
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Combustion and performance characteristics of an HCCI engine utilizing trapped residual gas via reduced valve lift
Çınar, Can; Uyumaz, Ahmet; Polat, Seyfi; Yılmaz, Emre; Can, Özer; Solmaz, Hamit (Elsevier Ltd, 2016)In this study, the effects of residual gas fraction (RGF) on homogeneous charged compression ignition (HCCI) combustion were investigated experimentally. Experiments were performed at different lambda values and constant ... -
An experimental investigation on combustion and performance characteristics of supercharged HCCI operation in low compression ratio engine setting
Polat, Seyfi; Yucesu, H. Serdar; Uyumaz, Ahmet; Kannan, Kaushik; Shahbakhti, Mahdi (Pergamon-Elsevier Science Ltd, 2020)This study investigates the effects of boost pressure on combustion and performance of an early direct injection homogenous charge compression ignition (HCCI) engine at a low compression ratio (CR). A 2.0 L, four-cylinder, ... -
An Experimental Research on the Effects of Negative Valve Overlap on Performance and Operating Range in a Homogeneous Charge Compression Ignition Engine With RON40 and RON60 Fuels
Polat, Seyfi; Solmaz, Hamit; Uyumaz, Ahmet; Calam, Alper; Yilmaz, Emre; Yucesu, H. Serdar (Asme, 2020)In this study, the effects of negative valve overlap (NVO) on homogenous charge compression ignition (HCCI) combustion and engine performance were experimentally investigated. A four stroke, single cylinder, port injection ... -
An experimental study on the effects of diesel and jet-A1 fuel blends on combustion, engine performance and exhaust emissions in a direct injection diesel engine
Solmaz, Hamit; Yamık, Hasan; Uyumaz, Ahmet; Polat, Seyfi; Yılmaz, Emre (Turkish Society for Thermal Science and Technology, 2016)In this study, an experimental investigation was performed in order to determine the effects of Jet-A1(A100), diesel fuel and Jet-A1/diesel fuel blends (A25, A50, A75) including 25% Jet-A1/75% diesel, 50% Jet-A1/50% diesel ... -
Investigation of usability of the fusel oil in a single cylinder spark ignition engine
Calam, Alper; Solmaz, Hamit; Uyumaz, Ahmet; Polat, Seyfi; Yılmaz, Emre; Içingür, Yakup (Elsevier B.V., 2015)In order to decrease the dependency on petrol-originated energy resources, the utilization of different energy resources in internal combustion engines has been the center of interest of researchers. The main renewable ... -
Mapping of an HCCI engine using negative valve overlap strategy
Polat, Seyfi; Solmaz, Hamit; Yılmaz, Emre; Calam, Alper; Uyumaz, Ahmet; Yücesu, Hüseyin Serdar (Taylor and Francis Inc., 2020)In order to control combustion phasing and extend operation range of homogeneous charged compression ignition (HCCI) engines, several techniques such as controlling inlet air temperature and pressure, using alternative ... -
A numerical study on the effects of EGR and spark timing to combustion characteristics and NOx emission of a GDI engine
Polat, Seyfi; Uyumaz, Ahmet; Solmaz, Hamit; Yılmaz, Emre; Topgül, Tolga; Yücesu, Hüseyin Serdar (Taylor and Francis Inc., 2016)EGR is one of the most significant strategies for reducing especially nitrogen oxides (NOx) emissions from internal combustion engines. The thermal efficiency of spark ignition engines is lower than compression ignition ...