Shock absorber lubricant composition, shock absorber, and method for adjusting friction characteristics of shock absorber lubricant
AssigneeKYB Corporation
InventorShinji Kato
Life of this patent
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Abstract
Provided are a shock absorber-lubricating oil composition, a lubricating oil additive, and a method for adjusting the friction characteristics of the shock absorber-lubricating oil composition, capable of making both operation stability and ride comfort compatible with each other. A shock absorber-lubricating oil composition contains a base oil and a friction modifier. The friction modifier contains a pentaerythritol ester. The base oil contains an ester oil as a main component.
Claims15
A shock absorber-lubricating oil composition comprising:
- a base oil;
- and
- a friction modifier,
- wherein the friction modifier contains a pentaerythritol ester,
- the base oil contains an ester oil as a main component,
- the ester oil is an ester oil combining a fatty acid with less than 18 carbon atoms and an alcohol,
- the pentaerythritol ester is contained at a ratio of 2% to 30% by weight of the whole shock absorber-lubricating oil composition,
- the ester oil is a monoester oil, and
- the pentaerythritol ester contains a pentaerythritol tetraester as a main component.
A method for adjusting friction characteristics of a shock absorber-lubricating oil composition, the method comprising:
- adding a friction modifier containing a pentaerythritol ester to a base oil containing an ester oil as a main component,
- wherein the ester oil is an ester oil combining a fatty acid with less than 18 carbon atoms and an alcohol,
- the pentaerythritol ester is contained at a ratio of 2% to 30% by weight of the whole shock absorber-lubricating oil composition,
- the ester oil is a monoester oil, and
- the pentaerythritol ester contains a pentaerythritol tetraester as a main component.
Dependencies are inferred from the claim text.