Experimental investigation of particle emissions from a Dieseline fuelled compression ignition engine

• Published in: Fuel (Guildford) 2019-09, Vol.251, p.175-186
• Main Authors: Zeraati-Rezaei, Soheil, Al-Qahtani, Yasser, Herreros, Jose M., Ma, Xiao, Xu, Hongming
• Format: Article
• Language: English
• Subjects: Cetane number; Combustion; Compression; Diesel; Diesel engines; Dieseline; Emissions; Engine cylinders; Feasibility studies; Fuel injection; Fuel sprays; Gasoline; Ignition; Injection; Injection strategy; Loads (forces); Low cetane; Nitrogen oxides; NOx; Nucleation; Particle mass; Particulate matter; PCI; Premixing; Pressure; Smoke
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2019.03.138

•Dieseline CI combustion was investigated at medium-high engine operating loads.•Particle number and mass emissions were reduced by up to 99.5% compared to diesel.•Low concentration bimodal particle size distributions were observed for Dieseline.•Decrease of accumulation particles was less evident by increasing injection pressure.•With longer ignition-dwell, emissions were more sensitive to fuel injection timing. Achieving low-smoke and low-NOx premixed compression ignition (PCI) combustion at a wide engine operating load range has been a challenge; especially in multi-cylinder engines running at higher loads for which less data is available in the literature. More specifically, it is of interest to characterise particle emissions under these conditions and identify their possible reduction benefit in different size classes compared to conventional diesel combustion. Mixing diesel with gasoline (Dieseline) as an incentive to reduce fuel reactivity (cetane-number) and consequently improve premixing is believed to be useful for PCI. In this study, the feasibility and benefits of using low cetane-number (