Ford's answers to the NHTSA 6.7 Investigation
There was a request for a link to Ford's answer's to the NHTSA investigation posted on a previous thread, since closed. Here is the link: Ford's NHTSA Answers to the 6.7 investigation This PDF i...
Forum Discussion
Diesel Fuel Injector Deposits ---
From Fuel additives, not combustion chamber:
------------------
Investigation into the Formation and Prevention of Internal Diesel Injector Deposits
Number: 2008-01-0926
Published: 2008-04-14
Publisher: SAE International
Language: English
DOI: 10.4271/2008-01-0926
Author(s): Jörg Ullmann - Robert Bosch GmbH; Marion Geduldig - Robert Bosch GmbH; Heinz Stutzenberger - Robert Bosch GmbH; Rinaldo Caprotti - Infineum; Graham Balfour - Infineum
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, doi:10.4271/2008-01-0926.
Abstract:
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.
From Fuel additives, not combustion chamber:
------------------
Investigation into the Formation and Prevention of Internal Diesel Injector Deposits
Number: 2008-01-0926
Published: 2008-04-14
Publisher: SAE International
Language: English
DOI: 10.4271/2008-01-0926
Author(s): Jörg Ullmann - Robert Bosch GmbH; Marion Geduldig - Robert Bosch GmbH; Heinz Stutzenberger - Robert Bosch GmbH; Rinaldo Caprotti - Infineum; Graham Balfour - Infineum
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, doi:10.4271/2008-01-0926.
Abstract:
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.
