LAPSE:2023.17519
Published Article
LAPSE:2023.17519
Impact of Blow-By Gas and Endgap Ring Position on the Variations of Particle Emissions in Gasoline Engines
March 6, 2023
Particulate emission from internal combustion engines is a complex phenomenon that needs to be understood in order to identify its main factors. To this end, it appears necessary to study the impact of unburned gases, called blow-by gases, which are reinjected into the engine intake system. A series of transient tests demonstrate their significant contribution since the particle emissions of spark-ignition engines are 1.5 times higher than those of an engine without blow-by with a standard deviation 1.5 times greater. After analysis, it is found that the decanter is not effective enough to remove completely the oil from the gases. Tests without blow-by gases also have the advantage of having a lower disparity, and therefore of being more repeatable. It appears that the position of the “endgap” formed by the first two rings has a significant impact on the amount of oil transported towards the combustion chamber by the backflow, and consequently on the variation of particle emissions. For this engine and for this transient, 57% of the particulate emissions are related to the equivalence ratio, while 31% are directly related to the ability of the decanter to remove the oil of the blowby gases and 12% of the emissions come from the backflow. The novelty of this work is to relate the particles fluctuation to the position of the endgap ring.
Record ID
Keywords
backflow, blow-by, decanter, endgap, engine, Gasoline, oil, particles, transient
Subject
Suggested Citation
Berthome V, Chalet D, Hetet JF. Impact of Blow-By Gas and Endgap Ring Position on the Variations of Particle Emissions in Gasoline Engines. (2023). LAPSE:2023.17519
Author Affiliations
Journal Name
Energies
Volume
14
Issue
22
First Page
7492
Year
2021
Publication Date
2021-11-09
Published Version
ISSN
1996-1073
Version Comments
Original Submission
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PII: en14227492, Publication Type: Journal Article
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LAPSE:2023.17519
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doi:10.3390/en14227492
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[v1] (Original Submission)
Mar 6, 2023
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Mar 6, 2023
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