Title:
LUBRICATING OIL COMPOSITION AND USE METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/189121
Kind Code:
A1
Abstract:
Provided is a lubricating oil composition that is for use in a diesel engine equipped with a supercharger and that comprises: a base oil (A) containing a poly-α-olefin (A1); and a viscosity index enhancer (B) having an SSI (shear stability index) of 20 or less. The distillate quantity of the light fraction at 496°C or less is less than 80% by volume in a gas chromatography distillation test. The lubricating oil composition exhibits a high ability to sustain an effect in which the formation of deposits that can be generated within a compressor is suppressed and high compressor efficiency can be maintained over a long period of time when said lubricating oil composition is used in a diesel engine equipped with a supercharger in which the compressor outlet temperature reaches a high temperature of 190°C or more. Also provided is a use method for the lubricating oil composition.
Inventors:
SUNAHARA KENJI (JP)
YAMAMORI KAZUO (JP)
FUJIMOTO KOSUKE (JP)
YAMAMORI KAZUO (JP)
FUJIMOTO KOSUKE (JP)
Application Number:
PCT/JP2019/012768
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
TOYOTA MOTOR CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
C10M169/04; C10M101/02; C10M107/02; C10M145/14; C10N20/02; C10N30/02; C10N30/04; C10N40/25
Domestic Patent References:
WO2012070240A1 | 2012-05-31 |
Foreign References:
JP2015160951A | 2015-09-07 | |||
JP2008120908A | 2008-05-29 | |||
JP2013185087A | 2013-09-19 | |||
JP2017149830A | 2017-08-31 | |||
JP2015025079A | 2015-02-05 | |||
JP2016196595A | 2016-11-24 | |||
JP2016113497A | 2016-06-23 | |||
JP2017119787A | 2017-07-06 | |||
JP2016196595A | 2016-11-24 |
Other References:
SAE TECHNICAL PAPER, 14 October 2013 (2013-10-14)
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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