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Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2019/177125
Kind Code:
A1
Abstract:
A lubricating oil composition for use in an internal-combustion engine, the composition comprising: a base oil (A); an ashless dispersing agent (B) containing a non-boronated alkenyl succinic acid imide (B1) and a boronated alkenyl succinic acid imide (B2); a thiadiazole compound (C); and an aromatic carboxylic acid ester (D) having one or more hydroxy groups, wherein the contained amount of the component (C) is 0.2-1.2 mass% with respect to the entire amount of the lubricating oil composition, the contained amount of zinc dithiophosphate is less than 500 ppm by mass with respect to the entire amount of the lubricating oil composition in terms of zinc atoms, the contained amount of a metal-based cleaning agent is less than 600 ppm by mass with respect to the entire amount of the lubricating oil composition in terms of metal atoms.

Inventors:
KASAI MORITSUGU (JP)
UTAKA TOSHIMASA (JP)
Application Number:
PCT/JP2019/010695
Publication Date:
September 19, 2019
Filing Date:
March 14, 2019
Export Citation:
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Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M141/08; C10M129/74; C10M129/76; C10M133/16; C10M133/56; C10M135/36; C10N30/06; C10N30/08; C10N30/12; C10N40/25
Domestic Patent References:
WO2013141077A12013-09-26
WO2014189057A12014-11-27
WO2017057361A12017-04-06
WO2014156307A12014-10-02
Foreign References:
JP2001226381A2001-08-21
JP2000226593A2000-08-15
JP2009108157A2009-05-21
JPH11246883A1999-09-14
JPH11269476A1999-10-05
JP2010209182A2010-09-24
Other References:
See also references of EP 3766948A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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