Motorlarda ve motorlu taşıtlarda yakıt ekonomisi ve işletme şartlarının performansa etkilerinin incelenmesi
Fuel economy at engines and vehicles and investigation of performance affects to operating
Yazar: BARIŞ AKDENİZ
Danışman: Y.DOÇ.DR. RECEP YENİTEPE
Marmara Üniversitesi / Fen Bilimleri Enstitüsü / Makine Eğitimi Ana Bilim Dalı
Derece: Yüksek Lisans, 2006
Konu: Makine Mühendisliği = Mechanical Engineering

Özet:
ÖZETBu çal mada motorlarda yak t ekonomisini geli tirme ve yak t ekonomisine etki edenfaktörler incelenmi tir. Bunlar özellikle motor ve ta tla ilgili olan çal malard r.lk bölümde motorlu ta tlarda yak t ekonomisi geli tirme çabalar na yer verilmi tir. Buçal malar; tasar m teknolojisi, malzeme ve elektronik sistemler, a! rl ktaki azalmalar, havave yol direncinin azalt lmas gibi çal malard r.kinci bölümde motorlarda bugüne kadar yak t tüketimini azaltmaya yönelik yap lançal malar incelenmi tir. Yak t tüketimini azaltman n bir yolu ta tlardaki güç ihtiyac n azaltmakdi!eri ise gerekli gücü daha verimli bir ekilde sa!lamak ve etkin bir ekilde kullanmakt r.Otomotiv sektöründeki aray lar s v la t r lm petrol gaz (LPG)'nin araçlarda alternatif yak tolarak kullan m n gündeme getirmi tir.Son bölümde ise alternatif yak t kullan m ve LPG (S v la t r lm Petrol Gaz) dönü ümsistemleri incelenmi tir. Benzinli araçlarda mevcut sistemde herhangi bir de!i iklik yapmadanek bir sistemle kullan m sa!lanan s v la t r lm petrol gaz (LPG), di!er yak tlara nazarandaha güvenli bir çevre dostudur. Bu çal mada yeni nesil LPG Dönü üm Sistemlerinden SGIsisteminin benzinli motorlara uygulanmas yla elde edilen yak t ekonomisi ve alternatif yak tolarak LPG kullanan iki otomobilin motor performans üzerine olan etkisi deneysel olarakincelenmi tir. 4 silindirli, 4 zamanl benzin ve LPG dönü ümlü motorlar n yak t tüketimiölçülmü tür. Yap lan deneylerde otomatik anz manda over drive' n ve kliman n, düz vitesliaraçta ise kliman n yak t tüketimine etkisi tespit edilmi tir. Yap lan bu testler LPG'ninmaliyet olarak yakla k %40 yak t ekonomisi sa!lad ! n göstermi tir.Ekim 2006 Bar AKDEN Z

Abstract:
ABSTRACTn this experimental study, improvement of fuel economy and the factors of fueleconomy have been investigated such as about engines and vehicles.In first part, the engined vehicles development of fuel economy studies take part in.These studies are about draft technologies, material and electronic systems,weightreduction,resistance to road and weather,etc.In second part, the searches,which try to reduce consuming of fuel in with in blazedengines, take part in. In cars there are two ways of decreasing the fuel consumption ,the firstone is limiting the need for power and the other one is maintaining and using the neededpower more efficiently and profitable. Inquiries on automotive section has lead to the use ofliquid petroleum gas(LPG) as an alternative fuel.In last part, To use Alternative Fuel and LPG (Liquefied Petroleum Gases) transformationsystems have been investigated. LPG,which enables the drivers to use their vehicles with thehelp of an additional device,but without any significant change in the present system,is a moreenvironmentally friendly fuel when compared with other alternatives. In this study, fueleconomy which is maintained through the application of SGI, one of the new LPG transformsystems to the gasoline engines. The same time we investigate how to LPG effect engineperformance of the two cars. The fuel consumption of a four-cylinder four-stroke petrol and totransformed LPG engine have been measured. In the performed tests,the effect of over-driveand air conditioner on automatic transmission is compared to the effect of air conditioner onmanual transmission in terms of fuel consumption. As a result of all these studies it isestablished that the use of LPG leads to a 40% reduction in fuel consumption.