| (19) |
 |
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(11) |
EP 1 803 796 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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22.08.2007 Bulletin 2007/34 |
| (43) |
Date of publication A2: |
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04.07.2007 Bulletin 2007/27 |
| (22) |
Date of filing: 22.12.2006 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE
SI SK TR |
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Designated Extension States: |
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AL BA HR MK YU |
| (30) |
Priority: |
26.12.2005 JP 2005373039
|
| (71) |
Applicants: |
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- Chevron Oronite Company LLC
San Ramon, CA 94583-2324 (US)
- Chevron Texaco Japan Ltd.
Tokyo, 101-0041 (JP)
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| (72) |
Inventors: |
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- Shiga, Michio
Hiratsuka-shi, Kanagawa (JP)
- Shiroi, Tomotsugu
Markinohara-shi, Shizuoka (JP)
- Takayama, Himiko
Omaezaki-shi, Shizuoka (JP)
- Buitrago, Juan A.
Hercules, California 94547 (US)
|
| (74) |
Representative: Nash, David Allan |
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Haseltine Lake
Redcliff Quay
120 Redcliff Street
Bristol BS1 6HU
Bristol BS1 6HU (GB) |
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| |
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| (54) |
A lubricating oil composition for automatic transmissions |
(57) The present invention relates to a lubricating oil composition comprising a major
amount of base oil of lubricating viscosity and the following additives in the following
amounts based on a total amount of the lubricating oil composition:
(A) 0.1 to 10 wt.% of a succinic acid ester,
(B) 0.01 to 2 wt.% of a phosphorous acid ester,
(C) 0.1 to 5 wt.% of an amide compound which is a reaction product obtained by reaction
of a linear or branched, saturated or unsaturated monovalent aliphatic acid having
8 to 22 carbon atoms, urea, and polyalkylenepolyamine,
(D) 0.01 to 2 wt.% of an overbased metal-containing detergent, and
(E) 0.01 to 1 wt.% of a corrosion inhibitor.