Investigation into the Formation and Prevention of Internal Diesel Injector Deposits 2008-01-0926
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High precision high pressure diesel common rail fuel injection systems play a key role in emission control, fuel consumption and driving performance.
Deposits have been observed on internal injector components, for example in the armature assembly, in the slots of the piston and on the nozzle needle. The brownish to colourless deposits can adversely impact driveability and result in non-compliance with the Euro 4 or Euro 5 emission limits.
The deposits have been extensively studied to understand their composition and their formation mechanism. Due to the location of these deposits, the influence of combustion gas can be completely ruled out. In fact, their formation can be explained by interactions of certain diesel fuel additives, including di- and mono-fatty acids. This paper describes the methodology used and the data generated that support the proposed mechanisms. Moreover, approaches to avoid such interactions are discussed.
Citation: Ullmann, J., Geduldig, M., Stutzenberger, H., Caprotti, R. et al., "Investigation into the Formation and Prevention of Internal Diesel Injector Deposits," SAE Technical Paper 2008-01-0926, 2008, https://doi.org/10.4271/2008-01-0926. Download Citation
Author(s):
Jörg Ullmann, Marion Geduldig, Heinz Stutzenberger, Rinaldo Caprotti, Graham Balfour
Affiliated:
Robert Bosch GmbH, Infineum
Pages: 12
Event:
SAE World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Fuel Injection and Sprays, 2008-SP-2183
Related Topics:
Fuel consumption
Fuel additives
Diesel fuels
Emissions control
Combustion and combustion processes
Pistons
Emissions
Assembling
Pressure
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