EGZOS SİSTEMLERİNDE DEPOZİT TESTLERİ VE DEPOZİT DOZLAMA HARİTASININ ÇIKARILMASI

Bu çalışmada, FORD OTOSAN tarafından tasarlanan egzos sistemlerinin deposit testleri tamamlanmış ve deposit haritalama algoritması geliştirilerek, ideal dozlama değerlerine ait deposit-haritası geliştirilmiştir. Testler, 36 test noktası için koşulmuştur. Testler sonrasında, hesaplanan sonuçlar MATLAB programı kalibrasyon modülü yardımıyla optimize edilmiştirve C++ tabanlı bir kod yardımıyla deposit haritası oluşturulmuştur. Bu harita sayesinde, uygun sozlama kalitesi, ideal sıcaklık değerleri öngörülebilir hale gelmiştir. Harita değerleri girdi olarak kullanılarak, deposit oluşmayan egzos sistemleri elde edilebilir hale gelmiştir

Anahtar Kelimeler:

Depozit oluşumu, SCR sistemleri, depozit testleri, depozit-harita algoritması, depozit haritası

DEPOSIT TESTING IN EXHAUST SYSTEMS AND DEPOSIT MAPPING STRATEGY

In this study, deposit formation tests of a designed exhaust system of FORD is completed, deposit mapping algorithm is created by in-house code and a map of optimum dosing is generated. Tests are repeated for 36 testing points. After the tests, measured data is optimized in MATLAB and with calibration module using a C++ based algorithm, deposit map is created. With the help of deposit map, exact dosing quantity and optimum temperature values can be predicted. By taking the calculated map values in deposit map as input, non-deposit exhaust system can be achieved.

Keywords:

Deposit formation, SCR system, deposit testing, deposit-map algorithm, deposit map,

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Amon B., 2009, Development of a SCR System for a Dual Line Exhaust by Using Two-Phase Flow CFD Calculations, International Symposium on Modelling of Exhaust Gas After Treatment.
Cartellieri et al., 2000, Development of a Fuel Efficient EU5 Heavy Duty Diesel Engine with Urea-SCR Exhaust Aftertreatment System, VDA Technical Congress, 28. -29. Sept. 2000, Frankfurt.
Fritz et al, 1999, On-Road Demonstrations of NOx Emissions Control for Diesel Trucks with SINOX Urea SCR System, SAE Paper 1999-01-0111.
Gabrielsson et al, 1999, Urea-SCR NOx Removal Efficiency For a Diesel Engine in the Suggested European ETC Test Cycle, 32nd ISATA Conference, Vienna- Austria.
Geas I., 2002, Performance of a Urea SCR System combined with a PM and fuel optimized Heavy-duty diesel engine able to achieve the Euro V emission limits, SAE Paper, 2002-01-2885.
Gekas et al, 2002, Urea-SCR Catalyst System Selection for Fuel and PM Optimized Engines and a Demonstration of a Novel Urea Injection System, SAE paper 2002-01-028.
Havenith et al, Transient Performance of a Urea deNOx Catalyst for Low Emissions Heavy-Duty Diesel engines, SAE Paper 970185.
Heuvel, van den, 1998, In-cylinder flow analysis for production-type Internal-combustion engines, Technische Universiteit Eindhoven DOI: 10.6100/IR517108.
Smith, H., Lauer, T., Mayer, M., and Pierson, S., 2014, Optical and Numerical Investigations on the Mechanisms of Deposit Formation in SCR Systems, SAE Int. J. Fuels Lubr. 7(2), DOI: 10.4271/2014-01-1563.2014. Walker et al, Development of an Ammonia/SCR NOx Reduction System for a Heavy Duty Natural Gas Engine, SAE Paper 921673.