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• W2267642012 abstract "Electromechanical valve systems (EMS) add advantages to engines in terms of performance and emission by eliminating the limitations of conventional variable valve systems that operate mechanically. Electromechanical valve systems also eliminate the need for certain mechanical parts (such as cam shaft and valve lifters), enabling valve timing to occur at any desired rate as independent of the cam shaft of the engine. End of the experimental works on Authors' previously published papers [1], give us the idea that more investigations are required on controlling the valve timings with ideal voltages. The purpose of this study was to measure the valve profile and electrical behaviour (coil current) of an electromechanical system designed for small volume internal combustion engines at different supply voltages (24 V, 33 V, 42 V, and 48 V), low and high engine speeds (1200 rpm and 3600 rpm), different valve openings (0o, 9o, 18o, 27o, and 36o KMA before the top dead centre), and different closing angles (27o, 36o, 50o, 63o, and 72o KMA after the bottom dead centre). An electromechanical valve system with a supply voltage of 33 V was most suitable for low-speed engine operations in order to achieve the identified valve timing. The amount of electricity consumed by using a 33 V supply voltage instead of a 42 V supply voltage at low engine speeds in the electromechanical valve system was bottom that the amount of electricity consumed by an electromechanical valve system operated with a supply voltage of 42 V at all engine speed intervals.Ozet: Elektomekanik valf sistemi(EVS) motorlara performans ve emisyon acisindan mekanik olarak calisan konvansiyonel degiskenli valf sistemlerinin kisitlamalarini elimine ederek avantajlar saglar. Bunun yaninda elektomekanik valf sistemi gerekli mekanik parcalari elimine eder(ornegin eksantrik mili ve valf filtresi), valf zamanlamasini eksantrik milden bagimsiz olarak istenilen herhangi sir seviyede tutabilir. Yazarin daha once yayinladigi makalelerin deneysel calismalarinin sonunda cikanlar [1], valf zamanlamasi kontrolunun ideal voltajlar ile yapilabilmesi icin daha cok arastirma yapilmasi gerektigi hakkinda fikirler vermektedir. Bu calismanin amaci, kucuk hacimli iten yakmali motorlar farkli beslenme gerilimlerinde(24V, 33V, 42V ve 48V), dusuk ve yuksek motor hizlarinda(1200 dds ve 3600 dds), farkli valf araliklarinda(0o, 9o, 18o ve 36o KMA alt olu noktadan once), farkli kapatma acilarinda(27o, 36o, 50o, 63o, ve 72o KMA ust olu noktadan sonra) valf profilini ve elektromekanik sistemin elektriksel davranisini (akim bobini) olcmektir. 33V beslenme gerilimi ile elektromekanik valf sistemi, dusuk hizli motor operasyonlarinda tanimlanmis valf zamanlamasini elde etmek icin en uygun alternatiftir. Elektromekanik valf sistemlerinde dusuk motor hizlarinda 42 V beslenme gerilimi yerine 33 V beslenme gerilimi kullanilmasiyla tuketilen elektrik, butun motor hiz aralilarina gore daha dusuk olacaktir." @default.
• W2267642012 created "2016-06-24" @default.
• W2267642012 creator A5024058019 @default.
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• W2267642012 date "2013-05-03" @default.
• W2267642012 modified "2023-09-26" @default.
• W2267642012 title "The electromechanical control of valve timing at different supply voltages / Farklı Besleme Gerilimlerinde Valf Zamanlamasının Elektromekanik Kontrolü" @default.
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• W2267642012 doi "https://doi.org/10.18245/ijaet.48690" @default.
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