This work deals with the nature of cycle by cycle variations in a single cylinder, lean burn, natural gas fuelled spark ignition engine operated at a constant speed of 1500 rev/min under variable equivalence ratio, fixed throttle conditions. Cycle by cycle variations in important parameters like indicated mean effective pressure (IMEP), peak pressure, rate of pressure rise and heat release characteristics were studied. At the lean misfire limit there was a drastic increase in combustion duration. With mixtures leaner than the lean limit, good cycles generally followed poor cycles. However, the vice versa was not true. Cycles that had a high initial heat release rate lead to more complete combustion. A high rate of pressure rise led to a high IMEP. The IMEP of cycles versus their frequency of occurrence was symmetric about the average value when the combustion was good.
- Internal Combustion Engine Division and Rail Transportation Division
An Experimental Study of Cyclic Variations in a Lean Burn Natural Gas Fuelled Spark Ignition Engine
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Ramesh, A, Tazerout, M, & Le Corre, O. "An Experimental Study of Cyclic Variations in a Lean Burn Natural Gas Fuelled Spark Ignition Engine." Proceedings of the ASME 2003 Internal Combustion Engine and Rail Transportation Divisions Fall Technical Conference. Design and Control of Diesel and Natural Gas Engines for Industrial and Rail Transportation Applications. Erie, Pennsylvania, USA. September 7–10, 2003. pp. 321-329. ASME. https://doi.org/10.1115/ICEF2003-0772
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