Title:
潤滑方法
Document Type and Number:
Japanese Patent JP2010523733
Kind Code:
A
Abstract:
A method of lubricating a two-stroke, diesel crosshead engine comprises lubricating the engine with a cylinder oil and with a system oil, which oils are different from each other, in which the system oil is an SAE 20 or SAE 30 oil, has a total base number of at least 10 mg KOH/g and comprises: (a) a base oil; (b) at least one detergent additive in a total amount of detergent corresponding in performance, as measured by the Hot Filtration Test, to at least 1.5% by weight of the system oil, of a calcium alkyl salicylate detergent soap in which the alkyl group is a C12 to C30 alkyl group; and (c) at least one anti-wear additive. The method further comprising replenishing the system oil in the engine with a top-up system oil, in which the top-up system oil has the same additives as in the system oil previously charged to the engine but has a viscosity which is lower than that of the system oil previously charged to the engine. The system oil may be prepared by mixing a low detergency system oil with a lubricant concentrate composition which comprises a base oil and at least one detergent additive.
Inventors:
Harold, Paul Andrew
Riddie, john philippe
Rim, Kokche
Riddie, john philippe
Rim, Kokche
Application Number:
JP2010500349A
Publication Date:
July 15, 2010
Filing Date:
March 20, 2008
Export Citation:
Assignee:
BP PLC
International Classes:
C10M169/04; C10M129/54; C10M137/10; C10N10/04; C10N20/00; C10N20/02; C10N30/00; C10N30/02; C10N40/25
Domestic Patent References:
| JP2006328403A | 2006-12-07 | |||
| JP2002105482A | 2002-04-10 |
Foreign References:
| WO2006014866A1 | 2006-02-09 |
Attorney, Agent or Firm:
Haruo Hamada