Availability Analysis of Diesel-Powered CI Engines with Single and Multiple Injection Strategies

Injection timing heavily influences the diesel engine performance and emissions. The present study utilizes a various injection strategies such as single injection, 30° BTDC and 50° pilot injection, paired pilot injection, and split injection on the performance and emissions. There are two conditions for a single pilot injection: the first is a 20% pilot injection at 30° BTDC, and the second is a 20% pilot injection at 50° BTDC. A twin injection approach uses a pilot of 5% at 50° BTDC and another 15% at 30° BTDC. Performance metrics like BTE, BSFC, and IMEP are determined at a compression ratio of 18:1 for 1000 RPM. The split injection condition produces a lower NOx, CO, and UHC emission. The pilot operation at 50° produces more CO and NOx emissions. Applying the second law of thermodynamics analysis to the CI engine, exergetic efficiency is assessed for various injection strategies, with split injection exhibiting the most optimal engine performance along with controlled emissions.