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Journals / Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2019 / Cilt: 12 - Sayı: 3

Investigation of the Effects of Injection Timing on Engine Performance and Formation of Emission in Homogeneous Charge Compression Ignition Engines

Homojen Dolgulu Sıkıştırma Ateşlemeli Motorlarda Enjeksiyon Zamanlamasının Motor Performansı ve Emisyon Oluşumuna Etkilerinin İncelenmesi

Müjdat FIRAT
İsmail TÜRKBAY
Pages
1217–1231
Publication Date
2019-12-31
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results showed that high temperatures, high NOx and soot emissions were obtained at early injection timing.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Homogeneous charge compression ignition engines are considered to be promising in studying areas due to their low NOx and soot emissions.
📊
Key Findings & Data:Particularly, it is aimed to improve combustion by changing the injection strategies of diesel fuel.
💡
Conclusion & Impact:The results showed that high temperatures, high NOx and soot emissions were obtained at early injection timing.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Homojen dolgulu sıkıştırma ateşlemeli motorlar · Enjeksiyon zamanlaması · Yanma

Abstract

Homogeneous charge compression ignition engines are considered to be promising in studying areas due to their low NOx and soot emissions. Particularly, it is aimed to improve combustion by changing the injection strategies of diesel fuel. In this study, different spray timing for a homogeneous charge compression ignition engine was investigated under diesel engine conditions. Also, the AVL-FIRE numerical software was used in this study. Further, injection timing was examined at -150CA, -120CA, -90CA, -60CA and -30CA before the top dead center (BTDC). The injection was completed 5CA after TDC for all injection timings. The results showed that high temperatures, high NOx and soot emissions were obtained at early injection timing. Especially, lower NOx and soot emissions were obtained in the retarded injection timings such as -90KA and -60KA. However, in the case of late injection, CO emissions were increased.

Özet

Homojen dolgulu sıkıştırma ateşlemeli motorlar düşük NOx ve is emisyonları sağlaması sebebiyle umut verici çalışma alanları olarak görülmektedir. Özellikle dizel yakıtının püskürtme stratejilerinin değiştirilmesiyle yanmanın iyileştirilmesi hedeflenmektedir. Bu çalışma kapsamında dizel motor şartları altında homojen dolgulu sıkıştırma ateşlemeli bir motor için krank açısına (KA) bağlı farklı püskürtme zamanlaması araştırılmıştır. Çalışma AVL-FIRE sayısal yazılımı kullanılarak gerçekleştirilmiştir. Enjeksiyon üst ölü noktadan (ÜÖN) önce sırasıyla -150KA, -120KA, -90KA, -60KA ve -30KA’nda başlayan zamanlamalar için incelenmiştir. Tüm püskürtme zamanlamaları için enjeksiyon ÜÖN’dan 5KA sonra tamamlanmıştır. Çalışmalar sonucunda erken enjeksiyon zamanlamalarında yüksek sıcaklıklar ve kısmen yüksek NOx ve is emisyonları elde edilmiştir. Özellikle -90KA ve -60KA gibi geciken enjeksiyon zamanlamalarında daha düşük NOx ve is emisyonları elde edilmiştir. Fakat enjeksiyonun daha geç yapılması durumunda ise CO emisyonlarının arttığı gözlenmiştir.

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Cite This Article

FIRAT, M., TÜRKBAY, İ. (2019). Investigation of the Effects of Injection Timing on Engine Performance and Formation of Emission in Homogeneous Charge Compression Ignition Engines. Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 12 - Sayı: 3, 1217–1231. https://ajindex.com/articles/234144

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