◎ Title : Effect of engine compression ratio, injection timing, and exhaust gas recirculation on gaseous and particle number emissions in a light-duty diesel engine
◎ Authors : Khawar Mohiuddin, Heesun Kwon, Minhoo Choi, Sungwook Park
◎ Journal : Fuel
◎ Information : Vol. 294, 120547(Article Number), 2021
◎ Keywords : Compression ratio, PN, EGR, Diesel, Gaseous emissions
◎ Abstract :
Along with other particulate and gaseous emissions, particle number (PN) from diesel engines has also been stringently regulated in the latest emission regulations. The present study focuses on combined effects of various parameters such as engine compression ratio (CR), start of injection (SOI) timing, and exhaust gas recirculation (EGR) rate on performance and emissions from a single-cylinder diesel engine with a special focus on PN. Three test cases with varying engine load were selected for this study. The engine was tested for these loading conditions with various compression ratios varying from 13.3 to 17. SOI sweep was carried out from -16 deg aTDC deg to -4 deg aTDC deg to identify the optimum injection timing with the best compression ratio. EGR sweep was also carried out with increasing EGR from 0% to 30% to see the effect of changing the EGR rate with increasing compression ratio on various emissions.