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Numerical Investigation of Injection Timing Influence on Fuel Slip and Influence of Compression Ratio on Knock Occurrence in Conventional Dual Fuel Engine (CROSBI ID 242048)

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Sremec, Mario ; Taritaš, Ivan ; Sjerić, Momir ; Kozarac, Darko Numerical Investigation of Injection Timing Influence on Fuel Slip and Influence of Compression Ratio on Knock Occurrence in Conventional Dual Fuel Engine // Journal of sustainable development of energy, water and environment systems, 5 (2017), 4; 518-532. doi: 10.13044/j.sdewes.d5.0163

Podaci o odgovornosti

Sremec, Mario ; Taritaš, Ivan ; Sjerić, Momir ; Kozarac, Darko

engleski

Numerical Investigation of Injection Timing Influence on Fuel Slip and Influence of Compression Ratio on Knock Occurrence in Conventional Dual Fuel Engine

Compressed natural gas can be used in diesel engine with great benefits, but because of its low reactivity it is usually used in a so called dual fuel combustion process. Optimal parameters for dual fuel engines are not yet investigated thoroughly which is the motivation for this work. In this work, a numerical study performed in a cycle simulation tool (AVL Boost v2013) on the influence of different injection timings on fuel slip into exhaust and influence of compression ratio on knock phenomena in port injected dual fuel engine was conducted. The introduction of natural gas into the intake port of a diesel engine usually results in some fuel slipping into the exhaust port due to valve overlap. By analysing the simulation results, the injection strategy that significantly decreases the natural gas slip is defined. The knock occurrence study showed that the highest allowed compression ratio that will result in knock free operation of the presented engine is 18 for ambient intake condition, while for charged intake conditions the compression ratio should be lowered to 16.

Diesel engines ; Dual fuel ; Compressed natural gas ; Methane ; Injection timing ; Fuel slip ; Knock

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Podaci o izdanju

5 (4)

2017.

518-532

objavljeno

1848-9257

10.13044/j.sdewes.d5.0163

Povezanost rada

Strojarstvo

Poveznice
Indeksiranost