Composition and method for preventing or reducing low speed pre-ignition in direct injected spark-ignited engines
AssigneesChevron Oronite Company LLC, Chevron U.S.A. Inc.
InventorsIan G. Elliott, Amir Gamal Maria, Richard Eugene Cherpeck, Theresa Liang Gunawan
Life of this patent
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Abstract
Disclosed herein are improved lubricating compositions effective to prevent or reduce low speed pre-ignition in an engine, as well as to prevent or reduce corrosion of engine components. The lubricating compositions include a base oil combined with a calcium chelate complex, optionally in further combination with additional additives.
Claims31
A lubricating composition comprising a base oil and at least one cyclic calcium chelate complex, wherein the calcium chelate complex comprises a complex having the formula:
- wherein:
- independently represents a single or double bond, provided that valence is satisfied;
- Y is selected from O, S, NRn1;
- Z is selected from O, S, or NRn2;
- and
- R1, R2, R3, Rn1, and Rn2are independently selected from Ra, ORb, and N(Rb)2;
- wherein Ra is in each case independently selected from hydrogen, C1-8alkyl, C2-8 alkenyl, C2-8 alkynyl, aryl, C1-8heteroaryl, C3-8 cycloalkyl, or C1-8 heterocyclyl;
- Rb is in each case independently selected from C1-8 alkyl, C2-8 alkenyl, C2-8 alkynyl, aryl, C1-8 heteroaryl, C3-8 cycloalkyl, or C1-8 heterocyclil;
- and
- wherein any two or more of R1, R2, R3, Rn1, and Rn2 can together form a ring.
A lubricating composition, comprising a base oil and at least one cyclic chelate complex, wherein the cyclic calcium chelate complex is the reaction product a calcium compound and a ligand having the formula:
- wherein
- Y is selected from O, S, NRn1;
- Z is selected from O, S, NRn2;
- R1, R2, R3, Rn1, and Rn2 are independently selected from Ra, ORb, and N(Rb)2;
- wherein Ra is in each case independently selected from hydrogen, C1-8alkyl, C2-8alkenyl, C2-8alkynyl, aryl, C1-8heteroaryl, C3-8cycloalkyl, or C1-8heterocyclyl;
- Rb is in each case independently selected from C1-8alkyl, C2-8alkenyl, C2-8alkynyl, aryl, C1-8heteroaryl, C3-8cycloalkyl, or C1-8heterocyclyl;
- wherein R2a, R2b, R2c, and R2d are independently selected from hydrogen;
- hydroxy;
- C1-22alkyl;
- and O—C1-22alkyl;
- wherein any two or more R groups can together form a ring.
A lubricating composition comprising a base oil and at least one cyclic calcium chelate complex, wherein the calcium chelate complex is the reaction product of a calcium compound and a ligand compound having the formula:
- wherein n is 0, 1 or 2;
- and R4a, R4a′, R4b, R4b′, R4c, R4c′, R4d, R4d′, R4e, and R4e′ are independently selected from hydrogen;
- hydroxy;
- C1-22alkyl, for instance, methyl, ethyl, n-propyl, isopropyl, n-butyl, iso-butyl, and tert-butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl;
- C1-22O-alkyl, for instance methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, iso-butoxy, or tert-butoxy;
- wherein any two or more of R4a, R4a′, R4b, R4b′, R4c, R4c′, R4d, R4d′, R4e, and R4e′ can together form a ring, preferably R4c and R4c′ are either hydroxyl or amino, preferably R4b and R4b′ are each methoxy.
Dependencies are inferred from the claim text.