Lubricating oil composition

Patent metadata

Field	Value
Publication number	US-10011802-B2
Application number	US-201515119568-A
Country	US
Kind code	B2
Filing date	Feb 16, 2015
Priority date	Feb 17, 2014
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A lubricating oil composition includes: a lubricating base oil; a component (A) that is a metal detergent having a base value of less than 100 mgKOH/g; a component (B) that is a metal detergent having a base value of 100 mgKOH/g or more; a component (C) that is a tertiary amine represented by a formula (1) below,

in which R 1 is a hydrocarbon group having 4 carbon atoms or more, and R 2 and R 3 each are a hydrocarbon group having 4 carbon atoms or less; and a component (D) that is at least one of acid phosphate and acid phosphite.

First claim

The invention claimed is:

1. A lubricating oil composition comprising:
a base oil;
a component (A) that is calcium sulfonate having a base value of from 10 mgKOH to less than 100 mgKOH/g;
a component (B) that is calcium sulfonate having a base value of 100 mgKOH/g to 500 mgKOH/g;
wherein a total content of the component (A) and the component (B) is in a range from 0.025 mass % to 0.2 mass % of a total amount of the lubricating oil composition based on a calcium content;
wherein a mass ratio of the component (A) and the component (B) is in a range of from 4:3 to 4:1 based on the total mass of the component (A) and the total mass of the component (B);
wherein the component (B) is present in an amount of 0.015 to 0.045 mass % based on a calcium content;
a component (C) that is a tertiary amine represented by a formula (1) below,

where: R 1 is a hydrocarbon group having 16-22 carbon atoms, and R 2 and R 3 each are a hydrocarbon group having 4 carbon atoms or less;
wherein the component (C) is present in an amount of 0.01 to 0.1 mass % based on an amount of nitrogen; and
a component (D) that is at least one selected from the group consisting of acid phosphate and acid phosphite;
wherein the component (D) is present in an amount of 0.02 mass % or more based on an amount of phosphorus, and
wherein the lubricating oil composition has a coefficient of friction between metals measured using a tester according to ASTM D2174 of from 0.120 to 0.123, and a clutch anti-shudder lifetime measured according to JASO M349-2012 of from 480 to 552 hours.

2. The lubricating oil composition according to claim 1 , wherein the component (D) is an acid phosphite.

3. The lubricating oil composition according to claim 1 , wherein the lubricating oil composition is used for a continuously variable transmission.

4. The lubricating oil composition according to claim 1 , wherein the amount of the component (A) is from 0.01 to 0.08 mass % based on the calcium content.

5. The lubricating oil composition according to claim 1 , wherein R 2 and R 3 have 1 or 2 carbon atoms and R 1 has from 16 to 20 carbon atoms.

6. The lubricating oil composition according to claim 1 , wherein the amount of the component (D) is from 0.02 to 0.09 mass % based on the amount of phosphorous phosphorus.

7. The lubricating oil composition according to claim 6 , wherein the acid phosphate and the acid phosphite have the following structures (2) and (3):

wherein R 4 to R 9 are hydrocarbon groups having 12 carbon atoms or less.

8. The lubricating oil composition according to claim 1 , wherein the total content of the components (A) and (B) is from 0.025 to 0.09 mass % based on the calcium content.

9. The lubricating oil composition according to claim 1 , wherein the component (A) has a base value of from 10 mgKOH/g to 50 mgKOH/g; and
the component (B) has a base value of 300 mgKOH/g to 500 mgKOH/g.

10. The lubricating oil composition according to claim 1 , wherein the component (C) is selected from the group consisting of dimethylhexadecylamine, dimethyloctadecylamine, dimethylheneicosylamine, diethyloctadecylamine, methylethyloctadecylamine and combinations thereof.

Assignees

• Idemitsu Kosan Co

Inventors

• Narita Keiichi
• Nara Atsushi

Classifications

• C10M2219/106

  Thiadiazoles · CPC title

• C10M2207/144

  containing hydroxy groups · CPC title

• C10M2219/044

  Sulfonic acids, Derivatives thereof, e.g. neutral salts · CPC title

• C10N2040/045

  for continuous variable transmission [CVT] · CPC title

• C10M163/00 Primary

  Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential · CPC title