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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11274262 B1

PDFFull Text
Date of Patent:
Mar. 15, 2022

Filed:

Mar. 26, 2019

Lubricating oil composition and use method therefor

Applicants:

Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Inventors:

Kenji Sunahara, Tsukuba, JP;

Kazuo Yamamori, Nagoya, JP;

Kosuke Fujimoto, Nisshin, JP;

Assignees:

IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Ellen M McAvoy

Int. Cl.
CPC ...
C10M 145/14 (2006.01); C10M 101/02 (2006.01); C10M 107/02 (2006.01); C10M 169/04 (2006.01); C10N 20/00 (2006.01); C10N 40/25 (2006.01); C10N 20/02 (2006.01); C10N 30/02 (2006.01); C10N 30/04 (2006.01); C10N 30/06 (2006.01);
U.S. Cl.
CPC ...
C10M 145/14 (2013.01); C10M 101/02 (2013.01); C10M 107/02 (2013.01); C10M 169/048 (2013.01); C10M 2203/1006 (2013.01); C10M 2205/003 (2013.01); C10M 2209/084 (2013.01); C10N 2020/02 (2013.01); C10N 2020/071 (2020.05); C10N 2020/073 (2020.05); C10N 2030/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/06 (2013.01); C10N 2040/252 (2020.05);
Abstract

Provided are a lubricating oil composition used in a diesel engine equipped with a forced-induction compressor, containing a base oil (A) containing a poly-α-olefin (A1), and a viscosity index improver (B) having an SSI (shear stability index) of 20 or less, having a distillation amount of a light fraction of 496° C. or less in a gas chromatography distillation test of less than 80% by volume, having a high retention of the effect of suppressing the formation of deposits that may occur inside the compressor, and being capable of retaining a high efficiency of the compressor for a long period of time, in the use thereof in a diesel engine equipped with a forced-induction compressor having an outlet temperature of the compressor becoming a high temperature reaching 190° C. or more, and a method for using the lubricating oil composition.

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