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Combustion analysis on a DI diesel engine with hydrogen in dual fuel mode

机译：双燃料模式的氢直喷柴油机燃烧分析

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Hydrogen is expected to be one of the most important fuels in the near future to meet the stringent emission norms. In this experimental investigation, the combustion analysis was done on a direct injection (DI) diesel engine using hydrogen with diesel and hydrogen with diethyl ether (DEE) as ignition source. The hydrogen was injected through intake port and diethyl ether was injected through intake manifold and diesel was injected directly inside the combustion chamber. Injection timings for hydrogen and DEE were optimized based on the performance, combustion and emission characteristics of the engine. The optimized timing for the injection of hydrogen was 5° CA before gas exchange top dead center (BGTDC) and 40° CA after gas exchange top dead center (AGTDC) for DEE. From the study it was observed that hydrogen with diesel results in increased brake thermal efficiency by 20% and oxides of nitrogen (NO_x) showed an increase of 13% compared to diesel. Hydrogen-DEE operation showed a higher brake thermal efficiency of 30%, with a significant reduction in NO_x compared to diesel.
机译：氢有望在不久的将来成为最严格的排放标准中最重要的燃料之一。在此实验研究中，燃烧分析是在直接喷射（DI）柴油机上进行的，该发动机使用氢气和柴油以及氢气和乙醚（DEE）作为点火源。氢气通过进气口注入，二乙醚通过进气歧管注入，柴油直接注入燃烧室内。根据发动机的性能，燃烧和排放特性优化了氢气和DEE的喷射正时。氢气注入的最佳时机是在DEE的气体交换上止点（BGTDC）之前为5°CA，在气体交换上止点（AGTDC）之后为40°CA。从研究中可以看出，与柴油相比，氢与柴油可将制动热效率提高20％，而氮氧化物（NO_x）则可提高13％。氢气-DEE操作显示出更高的制动热效率30％，与柴油相比，NO_x显着降低。

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