Lubricating composition for reducing wear and tear on dlc parts used in internal combustion engines
AssigneeTotalenergies Onetech
InventorsIsabelle Duron, Catherine Charrin, Benoit Thiebaut, Brian M. Casey
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Abstract
The present patent application relates to a method for reducing wear and tear on mechanical parts that are in contact with each other in an internal combustion engine by using a lubricating composition comprising: at least one base oil; at least one oxothiomolybdate salt; and at least one anti-wear compound; wherein at least one of the said parts includes a surface that comprises an amorphous carbon type coating.
Claims11
A method for reducing wear and tear on mechanical parts that are in contact with each other in an internal combustion engine by using a lubricating composition comprising:
- at least one base oil;
- at least one oxothiomolybdate salt;
- and
- at least one anti-wear compound;
- wherein at least one of the said parts includes a surface that comprises an amorphous carbon type coating, and wherein the oxothiomolybdate salt is neither MoDTC nor MoDTP.
A method for reducing the wear and tear on parts that are in contact with each other, in an internal combustion engine, at least one of the said parts including a surface that comprises an amorphous carbon type coating, by using at least one oxothiomolybdate salt in a lubricating composition, wherein the oxothiomolybdate salt is neither MoDTC nor MoDTP.
A method for reducing wear and tear on mechanical parts that are in contact with each other in an internal combustion engine by using a lubricating composition comprising:
- at least one base oil;
- at least one oxothiomolybdate salt being an ammonium salt or an imidazolium salt, or a mixture thereof;
- and
- at least one anti-wear compound;
- wherein at least one of the said parts includes a surface that comprises an amorphous carbon type coating,
- in which the ammonium oxothiomolybdate salt is a compound having the formula (I)
- in which
- R1 to R4 and R5 to R8, which may be identical or different, are selected from the group consisting of hydrocarbyl groups, in such a manner that the total number of carbon atoms of Q1 and Q2 is comprised between 34 and 110, and
- in which the imidazolium oxothiomolybdate salt is a compound having the formula (II)
- in which
- R1 to R5 and R6 to R10, which may be identical or different, are selected from the group consisting of H, and hydrocarbyl groups, in such a manner that the total number of carbon atoms of Q3 and Q4 is comprised between 62 and 166.
Dependencies are inferred from the claim text.