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메탄 직분사 엔진에서 분사 전략에 따른 연료 전환 효율 비교
최민후(Minhoo Choi),송진근(Jingeun Song),박성욱(Sungwook Park) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
The objective of this study is to compare fuel conversion efficiencies for varying injection strategies in methane direct injection engine. At various injection timings and equivalence ratios, fuel conversion efficiency and COVIMEP were acquired. Fuel conversion efficiency and COVIMEP were used to confirmed that injection timing and equivalence ratio affect combustion condition. When the combustion was unstable, COVIMEP was increased largely, fuel conversion efficiency was decreased. As equivalence ratio decreased from 1.0 to 0.8, fuel conversion efficiency was increased because of increased thermal efficiency and decreased heat loss.
최민후 ( Minhoo Choi ),윤성준 ( Sungjun Yoon ),박성욱 ( Sungwook Park ) 한국액체미립화학회 2017 한국액체미립화학회지 Vol.22 No.2
Recently, as the interest in environmental issues have increased around the world, the regulation on vehicle exhaust have been tightened in each country. To satisfy such tightened exhaust regulation, automotive manufactures are forced to equipped Diesel Particulate Filter (DPF) at Diesel vehicles. If DPF is used for a long time, DPF regeneration should be performed. The objective of this study is to research on post injection for DPF regeneration. The result of the study was that it was desired that retarding post injection timing, lower load of engine and smaller the amount of main fuel injection, for DPF regeneration. Oil dilution was tended to increase as load was lower, amount of post injection was increased, and post inject-tion timing was retarded.