LUBRICATING OIL COMPOSITION - INFINEUM INT LTD

Title:

LUBRICATING OIL COMPOSITION

Document Type and Number:

Japanese Patent JP2004143458

Kind Code:

A

Abstract:

To provide a lubrication oil composition for a heavy duty diesel engine and improved in suitability to a catalytic after-treatment device especially to an after-treatment device including an oxidation and/or reduction catalyst and simultaneously satisfies API-CI-4 standard.

The lubricating oil composition has TBN (total base number) of at least about 8 and comprises (a) a large amount of lubricating viscous oil; (b) one or more dihydrocarbyl dithiophosphate metal salt with no more than 0.06mass% of phosphorus to be introduced into the lubricating oil composition; (c) at least 1.2mass% of a hindered phenol antioxidant; and (d) boron and/or a boron-containing compound in an amount providing the lubricating oil composition with at least 200ppm by mass of boron.

Inventors:

ARROWSMITH STEPHEN
DIGGS NANCY Z
RITCHIE ANDREW J D
PAIN JORGE O

Application Number:

JP2003362225A

Publication Date:

May 20, 2004

Filing Date:

October 22, 2003

Export Citation:

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Assignee:

INFINEUM INT LTD

International Classes:

C10M129/10; C10M135/24; C10M135/30; C10M137/10; C10M139/00; C10M141/10; C10M141/12; C10M163/00; C10M169/04; C10N10/02; C10N10/04; C10N10/06; C10N10/08; C10N10/12; C10N10/14; C10N10/16; C10N20/00; C10N30/00; C10N40/25; (IPC1-7): C10M169/04; C10M129/10; C10M135/24; C10M135/30; C10M137/10; C10M139/00

Domestic Patent References:

JP2002053888A	2002-02-19
JP2001303087A	2001-10-31

Attorney, Agent or Firm:

Sadao Kumakura
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama

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