Title:
クロスヘッド型ディーゼル機関用シリンダー潤滑油組成物
Document Type and Number:
Japanese Patent JP5580051
Kind Code:
B2
Abstract:
A cylinder lubricating oil composition for diesel engines of the crosshead type is provided which is excellent in heat resistance and anti-seizing properties. The composition comprises a lube base oil and a phenate type metallic detergent (A) having an alkylphenol sulfide metal salt having five or more alkylphenol structures in the same molecule. This composition is useful especially in a two-stroke cycle diesel engine operated under such conditions that any or all of the following are satisfied: the bore size is 70 cm or larger; the engine is an ultra-long-stroke engine with a mean piston speed of 8 m/s or higher; the combustion pressure is 1.8 MPa or higher in terms of brake mean effective pressure (BMEP); and the cylinder wall temperature reaches 250°C or higher.
Inventors:
Shin-ichi Shirahama
Naozumi Arimoto
Naozumi Arimoto
Application Number:
JP2009547153A
Publication Date:
August 27, 2014
Filing Date:
December 25, 2008
Export Citation:
Assignee:
JX day ore Nippon Oil energy incorporated company
International Classes:
C10M159/22; C10M163/00; C10M139/00; C10N10/04; C10N30/00; C10N30/06; C10N30/08; C10N40/25
Domestic Patent References:
| JP2007510049A | 2007-04-19 | |||
| JP2007537334A | 2007-12-20 |
Attorney, Agent or Firm:
Sakai 1
Masahiro Sogo
Masahiro Sogo