A Study of Injector Deposits, Combustion Chamber Deposits (CCD) and Intake Valve Deposits (IVD) in Direct Injection Spark Ignition (DISI) Engines II

Noma, Kazutoshi; Noda, Toshiyuki; Isomura, Hidekatsu; Ashida, Tsuyoshi; Kamioka, Ryuichiro; Isoda, Toru; Nishida, Takahiro; Goto, Hisaharu; Kameoka, Atsushi; Koseki, Keiichi; Watanabe, Manabu; Seo, Masahiro; Koide, Syunichi; Tanaka, Eiji; Fukui, H.; Yamazaki, Yuji; Ohta, Satoshi; Notsuki, Yusuke; Tsuboi, Kazuma

doi:10.4271/2003-01-3162

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…Several authors have studied the physical and chemical characteristics of gasoline with and without additives and its impact on several combustion processes such as autoignition, , heat release, and soot precursor and soot formation, among others. All these features can lead to deposit formation at different parts of the gasoline engine such as the injector nozzle, − spark plug, , intake valves, ,, and combustion chamber walls . Ganeau et al have studied the formation of deposits in pistons using standard gasoline in an optical engine.…”

Section: Introductionmentioning

confidence: 99%

“…All these features can lead to deposit formation at different parts of the gasoline engine such as the injector nozzle, 9−11 spark plug, 12,13 intake valves, 11,14,15 and combustion chamber walls. 11 Ganeau et al 16 have studied the formation of deposits in pistons using standard gasoline in an optical engine. They studied the mechanisms leading to gasoline deposit formation on pistons and identified mainly two pathways: the liquid-film path and the soot path.…”

Section: ■ Introductionmentioning

confidence: 99%

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Gasoline Oxidation Stability: Deposit Formation Tendencies Evaluated by PetroOxy and Autoclave Methods and GDI/PFI Engine Tests

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Gasoline Oxidation Stability: Deposit Formation Tendencies Evaluated by PetroOxy and Autoclave Methods and GDI/PFI Engine Tests

et al. 2021

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Effect of surface temperature on the impaction and deposition of micron-sized engine oil particles on a heated flat plate

Khaneshan

Shojaeefard

2019

J Braz. Soc. Mech. Sci. Eng.

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Mechanism of deposit formation on an electronic throttle body

Hatsuzawa

Tanaka

Konno

2014

International Journal of Engine Research

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The buildup of deposits on the electronic throttle body (ETB) used to control the intake air flow in an internal combustion engine causes various problems. To obtain information that can be used to prevent the buildup of such deposit, the characteristics and mechanism of the deposit formation were investigated by analysis of the components of the deposit, measurement of the distribution of the deposit thickness, and numerical analysis of the intake air flow. The deposit was found to comprise a complex of fuel and engine oil, high molecular components, and inorganic matter, with engine oil being the major component. The distribution of the deposit thickness was also observed to be similar to that of the temperature decrease across the butterfly valve, indicating that the temperature decrease was related to the deposit formation. In addition, it was established that the deposit component on the downstream side of the butterfly valve was transported very close to the butterfly valve by a circulatory flow. Based on the study results, it is postulated that the mechanism of the ETB deposit formation involves the initial transportation, by the blow-by gas, of hydrocarbons to the ETB air passage, where the hydrocarbons are condensed and adhere to the passage wall just behind the butterfly valve, owing to sudden drop in the air temperature under small valve opening angle conditions. The formed deposit subsequently builds up by attracting fuel, engine oil, combustion products, and suspended solids in the atmospheric air intake passing through the air cleaner.

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A Study of Injector Deposits, Combustion Chamber Deposits (CCD) and Intake Valve Deposits (IVD) in Direct Injection Spark Ignition (DISI) Engines II

Cited by 9 publications

References 8 publications

Gasoline Oxidation Stability: Deposit Formation Tendencies Evaluated by PetroOxy and Autoclave Methods and GDI/PFI Engine Tests

Gasoline Oxidation Stability: Deposit Formation Tendencies Evaluated by PetroOxy and Autoclave Methods and GDI/PFI Engine Tests

Effect of surface temperature on the impaction and deposition of micron-sized engine oil particles on a heated flat plate

Mechanism of deposit formation on an electronic throttle body

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