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US 11,725,158 B2Granted
Grease composition for constant velocity joints
AssigneeGKN Driveline International GmbH
InventorsJisheng E, Christoph Lindlahr, Mario Witzdam
Life of this patent
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Abstract
A grease composition is intended primarily for use in constant velocity joints (CV joints), especially ball joints and/or tripod joints, which are used in the driveline of motor vehicles. The grease composition for use in constant velocity joints comprises at least one base oil, at least one thickener, zinc sulfide, as well as molybdenum disulfide and/or tungsten disulfide. Further, a constant velocity joint comprises the grease composition.
Claims12
A grease composition for use in constant velocity joints comprising
- a) at least one base oil;
- b) at least one thickener;
- c) zinc sulfide in an amount between approximately 0.1 wt-% and approximately 2.0 wt-% of a total amount of the grease composition;
- d) at least one of molybdenum disulfide and tungsten disulfide in an amount between approximately 0.5 wt-% and approximately 5.0 wt-% of the total amount of the grease composition;
- e) at least one organic sulphur-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition;
- and
- f) at least one organic phosphorus-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition;
- wherein the ratio between the amount of the at least one of molybdenum disulfide and tungsten disulfide to the amount of zinc sulfide is in a range between approximately 3:1 to approximately 10:1.
5 more elements
A method comprising:
- providing a grease composition comprising:
- a) at least one base oil;
- b) at least one thickener;
- c) zinc sulfide in an amount between approximately 0.1 wt-% and approximately 2.0 wt-% of a total amount of the grease composition;
- d) at least one of molybdenum disulfide and tungsten disulfide in an amount between approximately 0.5 wt-% and approximately 5.0 wt-% of the total amount of the grease composition, wherein the ratio between the amount of the at least one of molybdenum disulfide and tungsten disulfide to the amount of zinc sulfide is in a range between approximately 3:1 to approximately 10:1;
- e) at least one organic sulphur-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition;
- and
- f) at least one organic phosphorus-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition;
- and
- filling a constant velocity joint with the grease composition.
7 more elements
A constant velocity joint comprising:
- a grease composition comprising:
- a) at least one base oil;
- b) at least one thickener;
- c) zinc sulfide in an amount between approximately 0.1 wt-% and approximately 2.0 wt-% of a total amount of the grease composition;
- d) at least one of molybdenum disulfide and tungsten disulfide in an amount between approximately 0.5 wt-% and approximately 5.0 wt-% of the total amount of the grease composition, wherein the ratio between the amount of the at least one of molybdenum disulfide and tungsten disulfide to the amount of zinc sulfide is in a range between approximately 3:1 to approximately 10:1;
- e) at least one organic sulphur-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition;
- and
- f) at least one organic phosphorus-additive in an amount between approximately 0.2 wt-% and approximately 1.0 wt-% of the total amount of the grease composition.
5 more elements
Dependencies are inferred from the claim text.