Direct Injection Spark Ignition Engine Deposit Analysis: Combustion Chamber and Intake Valve Deposits

Parsinejad, Farzan; Biggs, Wilton

doi:10.4271/2011-01-2110

Cited by 18 publications

(19 citation statements)

References 18 publications

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“…Z kolei w kanałach dolotowych silnika konsystencja osadów była żywiczna i kleista, a na końcówkach wtryskiwaczy przybierała postać ży-wic. W skład osadów w ilości 10% (m/m) wchodzą związki nieorganiczne zawierające różne pierwiastki, z których dominującymi są Ca, Mo, Zn, P i S [23]. W konsekwencji parametry użytkowo-eksploatacyjne silnika są w dużej mierze zakłócane sumarycznym oddziaływaniem przedmiotowych osadów.…”

Section: Nafta-gaz Nr 2/2017unclassified

“…W konsekwencji parametry użytkowo-eksploatacyjne silnika są w dużej mierze zakłócane sumarycznym oddziaływaniem przedmiotowych osadów. Na przykład zawory dolotowe i wtryskiwacze (zwłasz-cza w przypadku silników z bezpośrednim wtryskiem paliwa) pracują w wysokiej temperaturze w bardzo reaktywnym śro-dowisku komór spalania silnika, dlatego też są one podatne na tworzenie się osadów [12,14,23,26,27,36]. Twarde osady na zaworach dolotowych i w komorach spalania ograniczają przepływ powietrza i zmieniają wzór zawirowania przepły-wu powietrza w cylindrze, co zaburza procesy tworzenia mieszanki i jej spalania w silniku.…”

Section: Nafta-gaz Nr 2/2017unclassified

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Oceny paliw etanolowych w testach silnikowych i eksploatacyjnych

Pałuchowska

Zbigniew

2017

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Oceny paliw etanolowych w testach silnikowych i eksploatacyjnych W artykule przedstawiono problem tworzenia szkodliwych osadów w silnikach z zapłonem iskrowym. Opisano wpływ osadów na właściwości użytkowo-eksploatacyjne silników oraz metody ich badań. Scharakteryzowano osady tworzone na różnych elementach roboczych silnika oraz układu wtrysku paliwa. Szczególną uwagę zwrócono na badania właści-wości eksploatacyjnych paliw etanolowych. Wyjaśniono przyczyny możliwych niekompatybilności dodatków detergentowych stosowanych do standardowych benzyn silnikowych z etanolem. Przytoczono dostępne w literaturze przykłady badań paliw etanolowych w zakresie udziału etanolu do 100% (V/V). Wyniki tych badań wykazały pozytywny wpływ etanolu w benzynie silnikowej na ograniczanie skłonności do tworzenia osadów, zwłaszcza w przypadku użycia odpowiednio uszlachetnionego paliwa. W podsumowaniu wskazano dostępne środki techniczne, jakie mogą być zastosowane podczas przeciwdziałania tworzeniu się szkodliwych osadów w silniku.Słowa kluczowe: benzyna, paliwo etanolowe, osady w silniku, dodatki do paliw. Evaluation of ethanol fuels in engine and field testsThe article presents problem of harmful deposits formation in spark ignition engines. Deposits impact on engine operating properties and methods of their tests has been described. The article also describes deposits build up on different engine elements and the fuel injection system. Particular attention was paid to testing the operating properties of ethanol blend fuels. The sources of possible incompatibilities of detergent additives used in standard petrol with ethanol have been explained. The cited examples of the available scientific literature, of studies of ethanol fuel in the share of ethanol to 100% by volume were presented. The results of these studies showed a positive effect of ethanol content in petrol, on reducing the tendency to form deposits, especially in the case of application of the appropriate fuel treatment. In conclusion, the technical means available, which can be used during the counteracting of the formation of harmful deposits in the engine have been indicated.

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Section: Nafta-gaz Nr 2/2017unclassified

Oceny paliw etanolowych w testach silnikowych i eksploatacyjnych

Pałuchowska

Zbigniew

2017

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“…Some studies have reported flaking within deposits, causing increased HC emissions and poor drivability [3,4]. Within Direct injection (DI) engines there is no washing effect of fuel spray, so there is an increased tendency of deposit formation on the intake valves' surface, which makes this problem more significant [5][6][7][8][9]. Most studies on deposit formation have consisted of road or dynamometer tests [9][10][11].…”

Section: Introductionmentioning

confidence: 97%

“…Within Direct injection (DI) engines there is no washing effect of fuel spray, so there is an increased tendency of deposit formation on the intake valves' surface, which makes this problem more significant [5][6][7][8][9]. Most studies on deposit formation have consisted of road or dynamometer tests [9][10][11]. Although using the actual engine tests provides the actual amount of the deposits formed in different parts of the engine, the effect of individual influential parameters remains unknown.…”

Section: Introductionmentioning

confidence: 97%

“…Belincanta [12] has studied gasoline deposits using both bench setup and test engine, showing that test setup can be used as an alternative to engine tests. A quick review of the studies on deposit formation shows that most of them are concerned with the effect of fuel and fuel additives [9,10,13,14]. One of the main sources of deposit formation on the intake valve surface is blow-by gases; these gases that enter the valve chamber contain some lubricant oil micro-droplets, which were not removed in the oil separator.…”

Section: Introductionmentioning

confidence: 99%

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Taguchi optimization of micron sized lubricant oil droplet deposition on a hot plate

et al. 2015

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The deposition of micron sized lubricant oil droplets similar to oil droplets in blow-by gases of Internal combustion (IC) engines on a hot flat plate was studied using a round impinging jet configuration. Five parameters which simulate the different operational conditions in IC engines were chosen: The impaction nozzle's outlet diameter, additional air flow rate, plate angle, plate temperature, and nozzle to the plate distance. An Experimental test-rig was constructed to acquire deposit weight with different parameter values. To find the conditions of minimum deposition, the deposit's weight was optimized using the Taguchi design of experiment method with respect to the design parameters. Using the experimental data, the predicted optimal value of the deposit weight was confirmed. Analysis of variance showed that plate angle is the most influential factor in deposition of fine oil droplets. Scanning electron microscopy (SEM) was used to investigate the mechanism of deposition.

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Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Azhaganathan

Ashok

2022

Intl J of Energy Research

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Summary Ethanol‐powered spark ignition (SI) engines have the potential to mitigate the twin crisis of fossil fuel depletion and exhaust emissions. However, the successful promotion of ethanol is hindered due to the restriction of fuel blend diversity and design features in the conventional SI engine. The fuel flexibility can be overcome by the use of flex‐fuel engine (FFE) technology with appropriate changes in engine design features for a wide range of ethanol blends. The understanding of FFE based on various technical aspects has greater potential in the automotive sector. Therefore, this review paper provides a holistic approach to critically analyze the various technical aspects of FFE. In this work, the application of ethanol blends on FFE output characteristics is reviewed critically considering the effects of engine operating conditions and parameters. Further, the impact of ethanol blends on material compatibility, cold starting characteristics, and unregulated emissions are analyzed. The outcome of the study shows that combustion and performance characteristics such as cylinder pressure(CP), heat release rate (HRR), and brake thermal efficiency (BTE) are improved in FFE operation due to the clean‐burning characteristics of ethanol blends. Also, carbon monoxide(CO) and hydrocarbon (HC) emissions decreased without any significant improvement in nitrogen oxides (NOx) emissions with a wide range of ethanol shares in FFE. Finally, this study summarizes the present status of research in FFE and creates a route towards the direction of multidisciplinary research need in the future that supports the application of different types of biofuels in FFE.

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Direct Injection Spark Ignition Engine Deposit Analysis: Combustion Chamber and Intake Valve Deposits

Cited by 18 publications

References 18 publications

Oceny paliw etanolowych w testach silnikowych i eksploatacyjnych

Oceny paliw etanolowych w testach silnikowych i eksploatacyjnych

Taguchi optimization of micron sized lubricant oil droplet deposition on a hot plate

Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

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