Title:
自動変速機用潤滑油組成物
Document Type and Number:
Japanese Patent JP5629587
Kind Code:
B2
Abstract:
A lubricating oil composition for automatic transmission including (A) a lubricant base oil having a kinematic viscosity at 100°C of from 1.5 to 20 mm 2 /s, (B) a polymethacrylate based viscosity index improver, and (C) a sulfur based compound having an acid value of not more than 1.0 mg-KOH/g and represented by the following general formula (1):
S-(CH 2 CH 2 COOR) 2 (1)
(in the formula, R represents a hydrocarbon group having from 8 to 30 carbon atoms), which has a high transmission torque capacity and satisfactory gear change shock characteristics and attains excellent fuel efficiency, is provided. Also, a lubricating oil composition for automatic transmission which is a lubricating oil having a low viscosity and a high viscosity index and which, despite this, not only has excellent shear stability and fatigue resistance (durability) but has a high transmission torque capacity and satisfactory gear change shock characteristics and attains excellent fuel efficiency, is provided.
Inventors:
成田 恵一
Application Number:
JP2010548549A
Publication Date:
November 19, 2014
Filing Date:
January 28, 2010
Export Citation:
Assignee:
出光興産株式会社
International Classes:
C10M161/00
Domestic Patent References:
| JPH09328697A | 1997-12-22 | |||
| JPH09263782A | 1997-10-07 | |||
| JP2004051758A | 2004-02-19 | |||
| JPH09194868A | 1997-07-29 | |||
| JPH10279980A | 1998-10-20 | |||
| JP2008179662A | 2008-08-07 |
Foreign References:
| WO2005078054A1 | 2005-08-25 | |||
| WO2004074414A1 | 2004-09-02 | |||
| WO2006073198A1 | 2006-07-13 |
Attorney, Agent or Firm:
Tamotsu Otani