Operation of a two-stroke, spark-ignition engine on a nonconventional lubricant
Document Type
Conference Proceeding
Publication Date
1-1-2017
Abstract
© 2017 ASME. Two-stroke engines are capable of providing very high power density levels in a cost effective, easy-tomaintain package. They are, however, typically susceptible to higher levels of hydrocarbon emissions, lower durability, and a shorter lifecycle when compared to four-stroke engines. These detriments are easily overlooked in some military applications where power density is paramount, but most commercial two-stroke engines require specialized consumable lubricant. Typical military applications strive to minimize their logistics "trails," which includes minimizing the variety of fluids they require. As a result, there has been very limited success in fielding small two-stroke engines for military use. As a preliminary study, MIL-PRF-2104K Single Common Powertrain Lubricant (SCPL, a four-stroke heavy diesel engine oil) was utilized as the consumable lubricant (in place of conventional twostroke oil) in a liquid-cooled, semi-direct fuel injected, spark-ignition, two-stroke engine. Empirical data was collected to study the impact of the oil on deposit build-up, power, wear, combustion stability, and fuel conversion efficiency. Over 147 hours of operation were logged and analyzed. The performance of the engine on SCPL was consistent with conventional two-stroke oil and showed no degradation over the test duration. Brake specific fuel consumption was not negatively impacted with SCPL. Increased deposit build-up in the exhaust ports and on the spark plugs were the primary negative impacts of the SCPL oil. Spark plugs with hotter classifications and modification of the oiling rate resulted in a reduction of soot accumulation and spark plug fouling.
Publication Title
ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017
Recommended Citation
Ahles, J.,
Price, K.,
Eggart, B.,
Miers, S.,
Wiegand, A.,
Kowalski, D.,
&
Biske, A.
(2017).
Operation of a two-stroke, spark-ignition engine on a nonconventional lubricant.
ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017,
2.
http://doi.org/10.1115/ICEF20173645
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/11851