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Experimental investigation of performance improving and emissions reducing in a two stroke SI engine by using ethanol additives

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Propulsion and Power Research 2013年第4期2卷 276-283页

作者： mohsen ghazikhani Mohammad Hatami Behrouz Safari Davood Domiri Ganji Ferdowsi University of Mashhad Engineering FacultyMechanical Engineering DepartmentIran Esfarayen University Engineering and Technical CollegeMechanical Engineering DepartmentEsfarayenNorth KhorasanIran Babol University of Technology Mechanical Engineering DepartmentMazandaranBabolIran

In present study,the operational parameters for a two stroke gasoline engine such as delivery ratio,scavenging efficiency,trapping efficiency,*** been investigated experimentally when its fuel is blended with ethanol *** the amounts of emitted pollutants(HC,CO,CO_(2)and NO_(X))from this engine are measured in various engine velocity and *** experiments,ethanol is combined with gasoline in different percentages of 5%,10%and 15%.The experiments have been done for 2500,3000,3500 and 4500 *** results show that in most test cases,when alcoholic fuel is used,scavenging efficiency and delivery ratio increased due to rapid evaporation of ethanol,but fuel converging efficiency and brake specific fuel consumption(BSFC)*** most outstanding result of using ethanol additive is significant reduction in pollutions emitted from engine and CO with 35%reduction has the most reduction percentage among other pollutants.

关键词： Two strokeengine Ethanol additives Delivery ratio Scavenging efficiency Emissions

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Comparison the Genetic Potential of Some Growth ＆ Milk Trait, s of Hybrid （Crossed） Saanen with Native Goat （Lori Black Goat） versus Native Goats in Qom Province

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Journal of Agricultural Science and Technology(A) 2011年第8期1卷 1297-1299页

作者： S. M. Hoseini ghazikhani M. Kalantar Department of Animal Science Saveh Branch Islamic Azad University Saveh Iran Agricultural Researches Center of Qom Qom Iran

The performance of some growth and milk traits of selected Qomi native （Lori black） goats and hybrids of saanen with native goats during 2008-2010 was compared. Growth traits include birth weight （BW）, one-month weight （1 MW）, weaning weight （WW） and 6-month weight （6 MW）. Also the milk production traits was monthly milk production on 2, 3, 4, 5th months （quantitative traits） and some milk composition included dry matter （%DM）, fat （%F）, and protein （%P） percentage on during of production （qualitative traits）. There were no significant differences in sex, birth type and genetic group for BW. Also the effect of genetic groups on 1 MW, WW, and 6 MW was significant, while effects of sex and birth type on 1 MW, WW and 6 MW was not significant. Also MW （Mothe＇s weight） had no significant effect on BW, 1 MW, WW and 6 MW. The average of daily milk records was 0.48 kg for nativel and 1.1 kg for crossed goats. The maximum monthly milk records in two groups were in second month （native： 0.64 -4- 0.05, crossed： 1.44 ~： 0.12） and the minimum were in fifth month （native： 0.36 ＋ 0.03, crossed： 0.77 -4- 0.05）. %DM, %F and %P in 5th month were higher than other months in two groups. Effects of genetic groups on milk production and also on average of%F, %DM and %P were significant. This study showed that the crossbreeding has a significant effect on most milk production and growth traits in Iranian native goats.

关键词： Saanen goat qomi native goat growth traits milk traits

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