Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Abdullah, Nik Rosli; Shahruddin, Nafis Syabil; Mamat, Rizalman; Mamat, Aman Mohd Ihsan; Zulkifli, Aminuddin

doi:10.15282/jmes.6.2014.21.0091

Cited by 36 publications

(25 citation statements)

References 15 publications

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“…CO2 dissociation, combustion temperature, air to fuel ratio and other parameters could have contrary effects on final CO fraction. We can find more information about the subject of this study in previous papers [43], [44], [45], [46], [47]. Table 3.…”

Section: Validationmentioning

confidence: 99%

Composition and Stoichiometry Effects of Biogas as Fuel in Spark Ignition Engine

Mokrane¹,

Energy²,

Adouane³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

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The most important advantage of biogas is that one can retrofit easily the conventional combustion engines to be used for the new fuel but remain the problem of pollutant emission. In this paper, the effect of the biogas composition on the emissions of CO and NOx in an SI engine is investigated numerically. Three compositions were studied (CH4:40 %, CO2:60 %), (CH4:50 %, CO2:50 %), (CH4:60 %, CO2:40 %), at equivalence ratio (ϕ) from lean to rich. The non-adiabatic partially premixed combustion model with probability density function (PDF) method and Zimont model of the turbulent flame speed are used. It was found that increasing CO2 in the biogas lowers NOx emissions significantly, whereas, CO was found to be very low, and appears only at high CH4 concentration. A biogas with (CH4:60 %, CO2:40 %), burning at about (ϕ = 0.9), i.e. slightly lean mixture, and advanced spark timing (between 10 to 20°.) seems to be a very a realistic combination in terms of biogas composition, stoichiometry and spark timing. It is recommended that, to accomplish some upgrading, in case of biogases with low CH4 percentage, to get it up to 60 %.

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Section: Validationmentioning

confidence: 99%

Composition and Stoichiometry Effects of Biogas as Fuel in Spark Ignition Engine

Mokrane¹,

Energy²,

Adouane³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

View full text Add to dashboard Cite

show abstract

“…The primary aims of using spark ignition (SI) engine fuels are to improve the fuel characteristics in terms of reduced consumption of engine fuel, enhanced engine power and minimised redundant emissions [3,4]. Over the years, significant advancements have been made in SI engines [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of the performance and emissions of spark ignition gasoline engine

Rashid¹,

Mansor²,

Ghopa³

et al. 2022

Int. J. Automot. Mech. Eng.

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The resistance of gasoline to knocking is critically determined by the octane number. The engine will encounter a significant waste of power, reduced efficiency and enhanced emission levels if a well-defined gasoline octane number is not employed. In this study, the engine performance and emission of hazardous gases were experimentally investigated through the use of three gasoline fuels (RON95, 97 and 102). The engine selected for the testing was a 1.6-L four-cylinder Toyota 4A-GE Blacktop VVT with the original ECU. The engine was run at different constants for various part load conditions as well as at constant throttle body. The engine that was operated with RON97 fuel was found to display positive improvements in terms of the brake specific fuel consumption of the engine, reduced at an average of 5 and 10%, compared to RON102 and RON95 fuels, respectively. Furthermore, the engine operated with RON102 fuel exhibited higher torque and engine power compared to RON97 and RON95. The brake thermal efficiency for both RON97 and RON102 fuels was remarkably improved at an average of 12% compared to RON95. The incorporation of RON102 fuel reduced the emission of NOX compared to RON95 and RON97 fuels at an average of 34% and 40%, respectively. The RON102 fuel produced the highest HC emission compared to RON97 and RON95. The CO emission was found to be higher for RON102 fuel compared to RON97 and RON95 at an average of 12.4% and 17%, respectively. The study concluded that although engine performance and efficiency versus gasoline depend highly on the engine design parameters, RON97 is able to deliver high performance and efficiency in all conditions. Therefore, it is recommended that RON97 be used instead of RON95 to achieve better performance with this type of engine.

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“…HCCI is an alternative operating mode for an internal combustion engine and is considered as one potential solution to solve this problem [4,5] besides that HCCI also can operated on wide range of fuel [3]. HCCI engines operates at higher thermal efficiency as high as 50% [6] than gasoline and diesel engines [7,8] with similar displacement volume, while it also emits ultra-low particle matter (PM) and nitrogen oxides (NOx) emissions [9]. These emission reductions are achieved by physically separating the injection events from the onset of combustion, therefore makes ignition delayed long enough to ensure a lean and nearly-homogenous air-fuel mixture.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling on homogeneous charge compression ignition combustion engine fueled by diesel-ethanol blends

et al. 2016

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Abstract. This paper investigates the performance and emission characteristics of HCCI engines fueled with oxygenated fuels (ethanol blend). A modeling study was conducted to investigate the impact of ethanol addition on the performance, combustion and emission characteristics of a Homogeneous Charge Compression Ignition (HCCI) engine fueled by diesel. One dimensional simulation was conducted using the renowned commercial software for diesel and its blend fuels with 5% (E5) and 10% ethanol (E10) (in vol.) under full load condition at variable engine speed ranging from 1000 to 2750 rpm with 250 rpm increment. The model was then validated with other researcher's experimental result. Model consists of intake and exhaust systems, cylinder, head, valves and port geometries. Performance tests were conducted for volumetric efficiency, brake engine torque, brake power, brake mean effective pressure, brake specific fuel consumption, and brake thermal efficiency, while exhaust emissions were analyzed for carbon monoxide (CO) and unburned hydrocarbons (HC. The results showed that blending diesel with ethanol increases the volumetric efficiency, brake specific fuel consumption and brake thermal efficiency, while it decreases brake engine torque, brake power and brake mean effective pressure. In term of emission characteristics, the CO emissions concentrations in the engine exhaust decrease significantly with ethanol as additive. But for HC emission, its concentration increase when apply in high engine speed. In conclusion, using Ethanol as fuel additive blend with Diesel operating in HCCI shows a good result in term of performance and emission in low speed but not recommended to use in high speed engine. Ethanol-diesel blends need to researched more to make it commercially useable.

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Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Cited by 36 publications

References 15 publications

Composition and Stoichiometry Effects of Biogas as Fuel in Spark Ignition Engine

Composition and Stoichiometry Effects of Biogas as Fuel in Spark Ignition Engine

An experimental study of the performance and emissions of spark ignition gasoline engine

Numerical modeling on homogeneous charge compression ignition combustion engine fueled by diesel-ethanol blends

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