Performance, Combustion and Emission characteristics of a Manifold Injected HCNGBiodiesel Dual Fuel Operation

Öz

Araç egzoz emisyon kontrolü ve motor verimliliği mevcut motor tasarımında en önemli parametrelerdir. Euro V emisyon normları motor emisyonlarını mücadele için yeni teknolojiler geliştirmeye yönelik araştırma aredirecting. Doğalgaz nedeniyle hazır kullanılabilirlik ve düşük emisyon seviyeleri de dahil olmak üzere pek çok avantajı için yaygın olarak kullanılan alternatif yakıt haline gelmiştir. CNG hidrojen ilavesi bileşimi ve baz yakıt CNG özelliklerini iyileştirir. Bu çalışma adiesel motorda / biyodizel dizel yanma içine doğrudan enjekte ederken Hidrojen sıkıştırılmış doğal gaz (HCNG) özel olarak geliştirilmiş elektronik kontrol ünitesi (ECU) manifoldusing alımı enjekte edildiği çift yakıtlı motor modunda çalışmak üzere dönüştürüldü sıkıştırma inme sırasında odası. Injectedprimary fuel.ECU için kullanıldığı gibi deneysel araştırmalar daha sonra enjekte Pilot yakıt ve HCNG olarak Diesel, Honge metil ester (HOME), Jatropha metil ester (Jome) kullanılarak çift yakıt modunda operatedin bir tek silindirli dört zamanlı CI motor test cihazı üzerinde yürütülmüştür Dizel / biodieselwas için optimum enjeksiyon zamanlaması 27 ° bTDC.The kılavuz yakıt enjeksiyon basıncı muhafaza ederken HCNG enjeksiyon için injectiontimings ve enjeksiyon değişik sürelerle 230 barda muhafaza edilmiştir. Motor 17.5 ve HCNG akış hızının constantcompression oranı ile çalıştırıldı 0.5kg / saat muhafaza edilmiştir. 5obTDC ve 40obTDCfor HCNG enjeksiyon enjeksiyon süresinin bir enjeksiyon zamanlaması showedthat deneysel sonuçlar, geliştirilmiş performansı, yanma ve emisyon özelliklerine göre uygun olduğu tespit edilmiştir. % 80 yükte dizel, EV ve Jome ile HCNGdual yakıt operasyonu enjekte formanifold fren ısıl verim sırasıyla% 28.1 olarak 27,2 ve% 26,2,% saptandı. Emisyonlar 5obTDC ve aninjection zamanlama ve 40o bTDCin HCNG enjeksiyon süresi ile daha az olduğu tespit edildi Duman emisyonları, Karbon monoksit (CO), karbon dioksit (CO2) çift yakıtlı operatedCI motorda HCNG manifoldu enjeksiyon çift yakıt operation.The kullanımını enjekte performansını artırır ve HC ve NOx emisyonlarının dışında motordan egzoz emisyonlarını azaltır.

Anahtar Kelimeler

• Araç
• egzoz
• emisyon

Performance, Combustion and Emission characteristics of a Manifold Injected HCNG Biodiesel Dual Fuel Operation

Öz

Vehicular exhaust emission control and engine efficiency are the most important parameters in current engine design. The Euro V emission norms aredirecting the research towards developing new technologies for combating engine emissions. Natural gas has become a widely used alternative fuel due to its many advantages including its ready availability and its low emission levels. Addition of hydrogen in CNG improves the composition and properties of base fuel CNG. In the present work adiesel engine was converted to operate in dual fuel engine mode in which Hydrogen-compressed natural gas (HCNG) was injected into the intake manifoldusing a specially developed electronic control unit (ECU) while diesel/biodiesel was injected directly inside the combustion chamber during the compression stroke. Experimental investigations were then carried out on a single cylinder four stroke CI engine test rig operatedin dual fuel mode using Diesel, Honge methyl ester (HOME),Jatropha methyl ester (JOME)as injected pilot fuels and HCNG as injectedprimary fuel.ECU was used for varying the injectiontimings and injection durations for HCNG injection while the optimum injection timing for diesel/biodieselwas maintained at 27°bTDC.The pilot fuel injection pressure was maintained at 230 bar. Engine was operated with constantcompression ratio of 17.5 and HCNG flow rate was maintained at 0.5kg/h. The experimental results showedthat an injection timing of 5obTDC and injection duration of 40obTDCfor HCNG injection was found to be optimum based on the improved performance, combustion and emission characteristics. The brake thermal efficiency formanifold injected HCNGdual fuel operation with diesel, HOME and JOME at 80% load was found to be 28.1%, 27.2% and 26.2% respectively. The Smoke emissions, Carbon monoxide (CO), Carbon dioxide (CO2) emissions were found to be lesser with aninjection timing of 5obTDC and injection duration of 40o bTDCin HCNG injected dual fuel operation.The use of HCNG manifold injection in the dual fuel operatedCI engine improves the performance and reduces the exhaust emissions from the engine except for HC and NOX emissions.

Anahtar Kelimeler

• Dual fuel engine
• Combustion
• Compression Ratio
• Injection strategies
• HCNG
• Injector
• ECU

Kaynakça

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