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Piston deposit control using metal‐free additives
Author(s) -
Hamblin P. C.,
Rohrbach P.
Publication year - 2001
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010140102
Subject(s) - lubricant , viscosity , diesel fuel , lubricity , viscosity index , gasoline , materials science , chemical engineering , synthetic oil , dispersant , combustion , waste management , metallurgy , chemistry , base oil , organic chemistry , composite material , engineering , scanning electron microscope , dispersion (optics) , physics , optics
Engines can be damaged in many ways: the principal oil‐related problems are due to deposit formation and viscosity increase. A first step in minimising the consequences of oil degradation is to reduce the formation of sludge and deposits. This can be accomplished by the judicious use of metal‐free (ashless) anti‐oxidants. Detergent/dispersant additives play a critical role in extending lubricant life by cleaning up deposits and keeping them in solution, and by neutralising acids formed during the combustion process. Several different types of antioxidants that can successfully eliminate precursors that lead to deposit formation and viscosity increase in oils in both gasoline and diesel engines have been identified. A novel, ashless, multifunctional additive that confers thermo‐oxidative stability and friction modification to engine lubricants is described here.