Naslov
Effect of Spark Plug Geometry on the Cyclic Combustion Variability and Fuel Consumption of Gasoline Engine

Autori
Sjerić, Momir ; Taritaš, Ivan ; Kozarac, Darko

Izvornik
Journal of energy engineering (0733-9402) 143 (2017), 6; 04017063, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
spark-ignition ; cyclic variability ; spark plug geometry ; fuel consumption

Sažetak
The numerical analysis of the spark plug geometry effect on the cyclic combustion variability and fuel consumption is presented. The cycle-simulations are performed at different operating conditions of spark ignition engine including the change of engine speed and load. After calibration of the model constants for average cycle using the experimental results of the considered engine, the cyclic combustion variability over 1500 cycles with the application of classic J-gap spark plug was simulated. With the same values of calibration constants and perturbations of parameters that cause the cyclic combustion variability, the cycle-simulations were performed with the fine central (iridium) electrode spark plug. The cycle-simulation results for the evaluation of combustion stability and fuel consumption are compared with the previous simulation results achieved with the classic spark plug geometry. It was shown that the application of iridium spark plug electrode improves the combustion stability over the analyzed operating range of the engine with the maximum improvement of 13.5% at part load and low engine speed. The reduction of fuel consumption of approximately 1.25% was achieved at part load conditions. The simulation results confirmed that the application of iridium spark plug geometry has potential to improve the engine stability and fuel economy.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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