Investigation into the Formation and Prevention of Internal Diesel Injector Deposits

Ullmann, Jörg; Geduldig, Marion; Stutzenberger, Heinz; Caprotti, Rinaldo; Balfour, Graham

doi:10.4271/2008-01-0926

Cited by 74 publications

(46 citation statements)

References 6 publications

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“…A very recent paper by Ullmann and co-workers points to diesel injector deposits (sticky polymeric deposits identified as polyamides) which are believed to be caused by additive incompatibility [40]. The authors have concluded that operating conditions of modern diesel engine fuel injectors in the presence of formic acid (a typical product of fuel oxidative break-down), were sufficient to promote reaction between polyisobutylene succinic imide (PIBSI) detergent additive and dimer acid lubricity additive.…”

Section: Additive Treatmentmentioning

confidence: 99%

Deposit Formation in the Holes of Diesel Injector Nozzles: A Critical Review

Birgel¹,

Ladommatos²,

Aleiferis³

et al. 2008

SAE Technical Paper Series

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Current developments in fuels and emissions regulations are resulting in increasingly severe operating environment for the injection system. Formation of deposits within the holes of the injector nozzle or on the outside of the injector tip may have an adverse effect on overall system performance. This paper provides a critical review of the current understanding of the main factors affecting deposit formation.Two main types of engine test cycles, which attempt to simulate field conditions, are described in the literature. The first type involves cycling between high and low load. The second involves steady state operation at constant speed either at medium or high load.

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Section: Additive Treatmentmentioning

confidence: 99%

Deposit Formation in the Holes of Diesel Injector Nozzles: A Critical Review

Birgel¹,

Ladommatos²,

Aleiferis³

et al. 2008

SAE Technical Paper Series

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“…It was also considered that if higher molecular weight carboxylates and sodium are contained in diesel fuel simultaneously, carboxylate salt deposits are build-up on metal surfaces at temperatures of 130 degress C or higher [8]. Moreover, sodium ions are captured by fatty acids, which are a by-product of FAME blended into diesel fuel.…”

Section: Tests Fuels Preparationmentioning

confidence: 99%

“…Two hypothesis are widely known for the formation of amide type IDID. One hypothesis assumes that deposits are formed through the reaction of PIBSI with fatty carboxylic acid to form an amide [8,17,22]. The other assumes that it is the low molecular weight portion of the PIBSI that is responsible for the deposit formation as it is only sparingly soluble in the diesel fuel and thus deposits on the surfaces of the inner injector parts [20,22].…”

Section: Tests Fuels Preparationmentioning

confidence: 99%

“…Continuing since 1997 development of HPCR (High Pressure Common Rail) systems which design features are more conductive or susceptible to deposit formation, especially IDID (Internal Diesel Injector Deposits), such as severe high temperature along with high pressure operating conditions as well as precision engineering to operate highly controlled multiple injection strategies [5][6][7]. This may rise problems in the field due to deposits that have formed on their critical moving parts, such as the needle and control valve and manifested themselves as injector sticking, rough idling, power loss, issues with drivability, high emissions and many more [8][9][10]. The current industry focus is on internal injector needle deposits.…”

Section: Introductionmentioning

confidence: 99%

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Deterioration of the fuel injection parameters as a result of Common Rail injectors deposit formation

Stępień

2017

MATEC Web Conf.

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Abstract. The article describes external and internal Common Rail injectors deposits formed in dynamometer engine simulation tests. It discussed not only the key reasons and factors influencing injector deposit formation but also the resulting way of fuel preparation and engine test approaches. The effects of external coking deposit as well as internal deposits two most common form types that is carboxylic soaps and organic amides on deterioration of the fuel injection parameters were assessed. The assessments covered both deposits impacts on quantitative and qualitative changes of the injectors diagnostic parameters and as a result on deterioration of the injector performance. Finally the comparisons between characteristic of dosage of one fuel injector before test and characteristics few injectors after engine tests of simulated deposit formation were made.

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“…Indeed, deposits along the needle and on the needle seat have also been discovered [4]. 4 These deposits are likely to have an impact on the internal flow and the external atomisation of the fuel jets emanating from the nozzle holes [5,6].…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation into the effect of hydrodynamic cavitation on diesel

Lockett

Jeshani

2013

International Journal of Engine Research

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This is the accepted version of the paper.This version of the publication may differ from the final published version. The commercial diesel samples subjected to high pressure cavitation flow and water bath heating revealed a response to the flow and temperature history that was identified by an increase in the optical extinction coefficients of the cavitated and heated samples. The contribution of cavitation flow and temperature to the variation in spectral extinction coefficient was identified. It was concluded that the increases observed in the spectral extinction coefficients of the cavitated commercial diesels were caused by the cavitation affecting the aromatics in the commercial diesel samples. Permanent repository link

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Investigation into the Formation and Prevention of Internal Diesel Injector Deposits

Cited by 74 publications

References 6 publications

Deposit Formation in the Holes of Diesel Injector Nozzles: A Critical Review

Deposit Formation in the Holes of Diesel Injector Nozzles: A Critical Review

Deterioration of the fuel injection parameters as a result of Common Rail injectors deposit formation

An experimental investigation into the effect of hydrodynamic cavitation on diesel

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