LUBRICATING OIL COMPOSITION

Title:

LUBRICATING OIL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2003/031544

Kind Code:

A1

Abstract:

A lubricating oil composition which comprises (A) a base oil for a lubricating oil, (B) calcium salicylate having a total base number of 50 to 300 mg KOH&sol g in an amount of 0.005 to 0.07 mass % in terms of calcium element, (C) a SP type extreme−pressure additive in an amount of 0.005 to 0.07 mass % in terms of phosphorus element, (D) a specific succinimide derivative in an amount of 0.1 to 6 mass % and (E) a boron−containing ashless dispersant in an amount of 0.001 to 0.05 mass % in terms of boron element, the percentages being relative to the total amount of the composition. The lubricating oil composition allows the prevention of pitching of a transmission, resulting in the increase of the fatigue life thereof, and exhibits satisfactory performance capability to prevent shuddering and also the capability to maintain the performance capability to prevent shuddering for a long period of time, and thus can be suitably used particularly for an automatic transmission and&sol or a non−stage transmission.

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Inventors:

MORITA EITARO (JP)

Application Number:

PCT/JP2002/010279

Publication Date:

April 17, 2003

Filing Date:

October 02, 2002

Export Citation:

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Assignee:

NIPPON OIL CORP (JP)
MORITA EITARO (JP)

International Classes:

C10M133/16; C10M137/02; C10M137/04; C10M137/08; C10M137/10; C10M139/00; C10M159/22; C10M163/00; C10M169/04; C10N20/00; C10N20/02; C10N30/00; C10N30/06; C10N40/04; C10N40/08; C10N40/25; C10N40/30; (IPC1-7): C10M163/00

Domestic Patent References:

WO1997014773A1

1997-04-24

Foreign References:

JP2000109867A	2000-04-18
JP2000109875A	2000-04-18
JP2000109872A	2000-04-18
US6232275B1	2001-05-15
GB2360528A	2001-09-26
JPH07268375A	1995-10-17
JPH11181464A	1999-07-06
JP2000063869A	2000-02-29
JPH09111275A	1997-04-28

Attorney, Agent or Firm:

Morita, Nobuyuki (5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo, JP)

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