The Effects of Phosphorus-Containing Engine Oil Additives on Exhaust Oxidation Catalyst Degradation

Abnormal Combustion Induced by Combustion Chamber Deposits Derived from Engine Oil Additives in a Spark-Ignited Engine

SAE International Journal of Engines ◽

10.4271/2014-32-0091 ◽

2014 ◽

Vol 8 (1) ◽

pp. 200-205 ◽

Cited By ~ 5

Author(s):

Kazushi Tamura ◽

Toshimasa Utaka ◽

Hideki Kamano ◽

Norikuni Hayakawa ◽

Tomomi Miyasaka ◽

...

Keyword(s):

Combustion Chamber ◽

Engine Oil ◽

Oil Additives ◽

Combustion Chamber Deposits

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Nanoscale Studies of the Role of ZDDPs in the Wear Protection in the Automobile Engine

ASME/STLE 2007 International Joint Tribology Conference, Parts A and B ◽

10.1115/ijtc2007-44156 ◽

2007 ◽

Author(s):

P. R. Norton ◽

Gavin Pereira ◽

Yue-Rong Li ◽

Andreas Lachenwitzer ◽

Masoud Kasrai ◽

...

Keyword(s):

Automobile Industry ◽

Fuel Efficiency ◽

Cost Savings ◽

Engine Oil ◽

Protective Film ◽

Oil Additives ◽

Wear Protection ◽

Alternative Materials ◽

Dialkyl Dithiophosphates

The improvement of fuel consumption is an important driving force for research and development in the automobile industry in order to minimize greenhouse gas emissions as well as improving fuel economy. Aluminum alloys are a class of alternative materials that are being used to replace cast iron in motor components due to the concomitant weight savings which result in improved fuel efficiency, and cost savings. Our research focuses on these alternative Al-based alloys as well as traditional steel interfaces, and the protective films that form on the surfaces. Currently the zinc dialkyl-dithiophosphates (ZDDPs) have been used as engine oil additives for over 60 years. They are important chemically-active additives, known for their antioxidant and antiwear characteristics. ZDDPs are known to form a protective film (tribofilms) at rubbed surfaces, typically on iron containing metals surfaces commonly used in the automotive industry; however ZDDPs and the products formed are not well suited for the environment as they can readily poison the catalytic converters and their efficacy on Al-Si alloys is not well established.

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Studies On Competitive Interactions and Blending Order of Engine Oil Additives by Variable Temperature31P-NMR and IR Spectroscopy

Tribology Transactions ◽

10.1080/10402009908982287 ◽

1999 ◽

Vol 42 (4) ◽

pp. 807-812 ◽

Cited By ~ 14

Author(s):

G. S. Kapur ◽

A. Chopra ◽

A. S. Sarpal ◽

S. S. V. Ramakumar ◽

S. K. Jain

Keyword(s):

Ir Spectroscopy ◽

Competitive Interactions ◽

Engine Oil ◽

Oil Additives

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Effects of B20 on Emissions and the Performance of a Diesel Particulate Filter in a Light-Duty Diesel Engine

ASME 2009 Internal Combustion Engine Division Fall Technical Conference ◽

10.1115/icef2009-14096 ◽

2009 ◽

Cited By ~ 1

Author(s):

Amy M. Peterson ◽

Po-I Lee ◽

Ming-Chia Lai ◽

Ming-Cheng Wu ◽

Craig L. DiMaggio ◽

...

Keyword(s):

Diesel Engine ◽

Diesel Particulate Filter ◽

Oxidation Catalyst ◽

Engine Oil ◽

Particulate Filter ◽

Oil Viscosity ◽

Regeneration Rate ◽

Diesel Particulate ◽

Light Duty ◽

Active Regeneration

This paper compares 20% bio-diesel (B20-choice white grease) fuel with baseline ultra low sulfur diesel (ULSD) fuel on the emissions and performance of a diesel oxidation catalyst (DOC) and diesel particulate filter (DPF) coupled to a light-duty 4-cylinder 2.8-liter common-rail DI diesel engine. The present paper focuses on the comparison of the fuel effects on loading and active regeneration of the DPF between B20 and ULSD. B20, in general, produces less soot and has lower regeneration temperature compared to soot loaded with ULSD. NO2 concentrations before the DPF were found to be 6% higher with B20, indicating more availability of NO2 to oxidize the soot. Exhaust speciation of the NO2 availability indicates that the slight increase in NOx from B20 is not the dominant cause for the lower temperature regeneration and faster regeneration rate but the reactivity of the soot that is in the DPF. Formaldehyde concentrations are found to be higher with B20 during regeneration due to increased oxygen concentrations in the exhaust stream. Finally the oil dilution effect due to post injection to actively regenerate the DPF is also investigated using a prototype oil sensor and FTIR instrumentation. Utilizing an active regeneration strategy accentuates the possibility of fuel oil dilution of the engine oil. The onboard viscosity oil sensor used was in good agreement with the viscosity bench test and FTIR analysis and provided oil viscosity measurement over the course of the project. Operation with B20 shows significant fuel dilution and needs to be monitored to prevent engine deterioration.

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