Critical temperatures in ep lubrication
1973; Elsevier BV; Volume: 26; Issue: 2 Linguagem: Inglês
10.1016/0043-1648(73)90134-8
ISSN1873-2577
AutoresA. Sethuramiah, Heihachiro Okabe, Takeshi Sakurai,
Tópico(s)Lubricants and Their Additives
ResumoAbstract This paper deals with EP lubrication failure as a temperature problem. In the Shell 4-ball machine using five sulfur compounds and two chlorine compounds two types of failure are recognized. Temperature calculations showed that the two failures occur at critical temperatures. To explain the constancy of the critical temperatures a different model for EP lubrication is proposed. Also under modified test conditions the possibility of EHD effects is recognized with some additives. An explanation for this effect is suggested. Electron probe micro analysis indicated the possibility of barrier films which may be responsible for the antiwear action of these additives leading to EHD effects.
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