Environmental Characteristics of an SI Engine Running on Methane and Gasoline

Dimitrov, Radostin; Bogdanov, Krasimir; Wróbel, Radosław; Luca, Liliana; Krasteva, Mariana Todorova; Pasăre, Minodora Maria

doi:10.1109/eeae49144.2020.9279049

Cited by 2 publications

(1 citation statement)

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“…Accordingly, it was recommended that larger inlet ports should be adopted to improve the performance of such engine types. A comparison of the gasoline and methane fuelled SI engines based on the environmental characteristics was performed by Dimitrov and his co-authors [23]. The experiments were performed under WOT and various engine speeds with the optimum setting of the spark timing and the air-to-fuel mixing for both tested fuels.…”

Section: Introductionmentioning

confidence: 99%

Throttling Effect on the Performance and Emissions of a Multi-Cylinder Gasoline Fuelled Spark Ignition Engine

Hamada

Rahim

Rahman

et al. 2022

Int. J. Automot. Mech. Eng.

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The throttle mechanism, a regulatory technique of engine output, is accompanied by a loss of some energy. The effect of intake air throttling on the performance and emissions of a multi-cylinder spark ignition gasoline engine was experimentally investigated. The engine was coupled to a hydraulic dynamometer equipped with a customized cooling system for both the engine and dynamometer. Experimental tests were performed for various engine speeds and air-fuel ratios at the WOT and POT conditions with optimized ignition timing. The acquired results recorded that a better engine operation could be achieved with WOT in terms of bmep, bsfc, ηb, CO, CO2 and UHC compared to POT. At the same time, the worst trend at WOT was noticed for the NOx concentration due to the higher conversion efficiency of fuel combustion. In terms of engine speed for both WOT and POT conditions, operating at 3000 rpm represents the minima of ϕ, bsfc, CO and UHC; and the maxima of ηb, CO2 and NOx with some fluctuation on both sides of this point. Maximum recorded values of ηb were about 30.55% and 28. 55%, while the minimum values of bsfc were about 274 and 293 g/kW.h for the WOT and POT conditions, respectively. The maximum bmep was obtained at 2500 rpm at WOT and POT conditions with values of about 940 kPa and 904 kPa, respectively. Maximum recorded values of NOx were about 1525 and 977 ppm for the WOT and POT conditions, respectively.

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Section: Introductionmentioning

confidence: 99%