A comparison of performance and exhaust emissions with different valve lift profiles between gasoline and LPG fuels in a SI engine

Çınar, Can; Şahin, Fatih; Can, Özer; Uyumaz, Ahmet

doi:10.1016/j.applthermaleng.2016.07.031

Cited by 48 publications

(24 citation statements)

References 18 publications

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“…A new special camshaft was designed and manufactured to operate the test engine with LIVC Miller cycle [17]. Valve lift, basic circle diameter and lifted valve period of the original cams were measured as 7 mm, 30 mm and 136°, respectively.…”

Section: Cam Designmentioning

confidence: 99%

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Performance and Emission Characteristics of a Miller Cycle Engine

Demirci¹,

Uyumaz²,

Sarıdemir³

et al. 2018

International Journal of Automotive Engineering and Technologies

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In this study, intake and exhaust cams were designed to perform the late intake valve closing (LIVC) Miller cycle operation (MA and MB cycles) using spline functions in a single-cylinder, four-stroke, spark-ignition (SI) engine. A special camshaft was manufactured and adapted to the engine to adjust valve opening and closing timings. The experiments were conducted at two different Miller cycle operation and the results were compared with Otto cycle. The tests were conducted between 1700-3200 rpm engine speed range at wide open throttle (WOT). In the experiments, the variation of brake torque, power output, specific fuel consumption (SFC), thermal efficiency, HC, CO, NOx emissions and exhaust gas temperature versus engine speed were investigated. More power output was obtained with Otto cycle than Miller cycles for all engine speeds. Brake torque and engine power decreased by 5.24%, and 1.17% respectively with MA cycle compared to Otto cycle at 2600 rpm engine speed. Thermal efficiency increased by 1.29%, while the SFC decreased 2.08 % with Otto cycle in comparison with MA cycle at maximum brake torque speed. HC and CO emissions increased by 6.48% and 11.66%, respectively with MA cycle compared to Otto cycle at the same operation condition. NOx emissions decreased up to 7.79% with MA cycle compared to Otto cycle due to the lower exhaust gas temperature at maximum brake torque engine speed of 2600 rpm.

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Section: Cam Designmentioning

confidence: 99%

“…where is cam angle, and are start and end of the classical spline function depend on cam angle [17,18]. Firstly, knot locations are determined using a classical spline.…”

Section: Cam Designmentioning

confidence: 99%

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Performance and Emission Characteristics of a Miller Cycle Engine

Demirci¹,

Uyumaz²,

Sarıdemir³

et al. 2018

International Journal of Automotive Engineering and Technologies

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“…LPG is relatively safe and less expensive than gasoline and diesel oil. Compared to conventional fuels, LPG-supplied engines emit lower or at least similar amounts of some toxic air pollutants and greenhouse gases [18].…”

Section: Ice Configurationmentioning

confidence: 99%

Parameters selection of extended-range electric vehicle supplied with alternative fuel

2018

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Abstract. In this paper modelling of extended-range electric vehicle powertrain. The model consists of sub-models of the investigated vehicle with its resistance forces, traction electric motor, range extender supplied with alternative fuel, and Li-Ion battery. Working point parameters of the range extender engine were defined to achieve low liquefied petroleum gas consumption. The model allowed to study possible parameters of vehicle range extender and battery size. The results show the higher influence of range extender power than battery energy capacity on the vehicle range. The defined range extender and battery parameters allow to significantly extend the vehicle range with low fuel consumption. This research provided ground for the further investigation of range extender control strategies.

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“…Cause, the volumetric efficiency of LPG is lower than gasoline, although LPG heat values are higher than gasoline (Gumus, 2011). Several methods have been used to fix this problem, but the ignition timing adjustment and the intake system improvement are the most commonly applied methods (Cinar et al, 2016;Kim et al, 2014;Lawankar and Dhamande, 2012).…”

mentioning

confidence: 99%

Economic Values and CO2 Simulation on the Application of LPG for Public Fleets in Magelang, Indonesia: Executive Data to Support the Clean City Program

Setiyo

Widodo

Rosyidi

et al. 2019

Period. Polytech. Transp. Eng.

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The implementation of the ASEAN Clean Tourist City Standard caused restlessness among public fleet operators and the Department of Transportation of Magelang City. Therefore, this article presents the prediction of economic value and environmental benefits of public fleet in Magelang that will be converted from gasoline to LPG. Investment feasibility parameters, such as Break Event Point (BEP), Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PBP) are presented through three financing scenarios compared with the current gasoline price at the fuel station, RON 88 and RON 90. Simulation results indicate that investment is feasible with the government providing fiscal incentives through the procurement of converter kits. The wages of the public fleet crew under Minimum Wage City will rise by 30 % and 70 % to switch from gasoline RON 88 and gasoline RON 90, respectively. Meanwhile, environmental benefits are also expected to improve, with CO 2 emission reduction of 320.46 tons/year or about 11 % of gasoline usage. These two benefits (economics and environmental) are expected to support the clean city program in Magelang City, Indonesia.

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A comparison of performance and exhaust emissions with different valve lift profiles between gasoline and LPG fuels in a SI engine

Cited by 48 publications

References 18 publications

Performance and Emission Characteristics of a Miller Cycle Engine

Performance and Emission Characteristics of a Miller Cycle Engine

Parameters selection of extended-range electric vehicle supplied with alternative fuel

Economic Values and CO2 Simulation on the Application of LPG for Public Fleets in Magelang, Indonesia: Executive Data to Support the Clean City Program

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