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Experimental Study on Combustion and Emissions of Duel Fuel Sequential Combustion with n-Heptane/Gasoline-Like Fuels
Technical Paper
2014-01-2682
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An experimental study was conducted on the combustion and emissions characteristics of duel fuel sequential combustion (DFSC) mode on a single-cylinder engine, applying port injection of n-heptane combined with in-cylinder direct injection of commercial gasoline, ethanol and n-butyl alcohol, respectively. Three-stage combustion, which consists of low- and high-temperature combustion of premixed n-heptane and high temperature combustion of directly injected gasoline-like fuels were observed. The effects of the premixed ratio and overall heating values per cycle on the combustion characteristics and emissions were investigated. The experimental results show that: with the increasing of premixed ratio and overall heating values per-cycle, the ignition timing of the directly injected fuels advances and the maximum pressure and maximum mass-averaged temperature increase. Furthermore, the CO emissions increase to a peak point and then decrease with the increase of premixed ratio and overall heating values. While, it is very interesting to find that soot emissions achieve to an ultra-low level for DFSC with n-heptane/oxygenated fuels, particular with n-heptane/ethanol.
Authors
Citation
Qian, Y., Zhu, L., Huang, Z., and Lu, X., "Experimental Study on Combustion and Emissions of Duel Fuel Sequential Combustion with n-Heptane/Gasoline-Like Fuels," SAE Technical Paper 2014-01-2682, 2014, https://doi.org/10.4271/2014-01-2682.Also In
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