A Numerical Study to Investigate Simultaneously the Effect of Fuel Injection Timing and Syngas Composition on Performance and Emission Characteristics of Heavy Compression Ignition Engine

In this study, the simultaneous effects of fuel injection timing and the use of syngas on the production of pollutants and the performance of a compression ignition engine with controlled reactivity have been investigated. Numerical solution of changing fuel injection timing from 10 to 30 degree before Top Dead Center and fuel compounds in three normal diesel modes, diesels with two ratios of 20 and 40% syngas (including hydrogen and carbon monoxide) are examined in this study while maintaining energy constant for each cycle. The results show that as the ratio of Syngas increases, the pressure and heat release rate into the cylinder increase; it is while, these values with the postponement of fuel injection timing​​have decreased. In addition, nitrogen oxide production is increased by the addition of syngas such as carbon monoxide, while delays in fuel injection timing reduce nitrogen and carbon dioxide oxides and increase carbon monoxide. The contamination of particulate matter has been greatly reduced by the addition of syngas, which continues to decrease with the delay in fuel injection timing. Also, the use of syngas, by delaying the timing of fuel injection, reduces the indicated power and indicated thermal efficiency while it increases the indicated fuel consumption. Finally, a 40% ratio of syngas and fuel injection timing of 10 degree before Top Dead Center is a good strategy to reduce pollutants.