Experimental investigation of a heavy-duty CI engine retrofitted to natural gas si operation
Title
Experimental investigation of a heavy-duty CI engine retrofitted to natural gas si operation
Subject
Natural gas
Combustion
Gas emissions
Greenhouse gases
Natural gasoline plants
Diesel engines
Description
Heavy-duty compression-ignition (CI) engines converted to natural gas (NG) operation can reduce the dependence on petroleum-based fuels and curtail greenhouse gas emissions. Such an engine was converted to premixed NG spark-ignition (SI) operation through the addition of a gas injector in the intake manifold and of a spark plug in place of the diesel injector. Engine performance and combustion characteristics were investigated at several lean-burn operating conditions that changed fuel composition, spark timing, equivalence ratio, and engine speed. While the engine operation was stable, the re-entrant bowl-in-piston (a characteristic of a CI engine) influenced the combustion event such as producing a significant late-combustion, particularly for advanced spark timing. This was due to an important fraction of the fuel burning late in the squish region, which affected the end of combustion, the combustion duration, and the cycle-to-cycle variation. However, the lower cycle-to-cycle variation, stable combustion event, and the lack of knocking suggest a successful conversion of conventional diesel engines to NG SI operation using the approach described here. Copyright 2018 ASME.
Internal Combustion Engine Division
1
Publisher
ASME 2018 Internal Combustion Engine Division Fall Technical Conference, ICEF 2018, November 4, 2018 - November 7, 2018
Date
2018
Contributor
Liu, Jinlong
Bommisetty, Hemanth
Dumitrescu, Cosmin E.
Type
conferencePaper
Identifier
10.1115/ICEF2018-9611
Collection
Citation
“Experimental investigation of a heavy-duty CI engine retrofitted to natural gas si operation,” Lamar University Midstream Center Research, accessed May 18, 2024, https://lumc.omeka.net/items/show/25035.