Marine engine lubrication
US8703676B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Apr 26, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Trunk piston marine engine lubrication, when the engine is fueled by heavy fuel oil, is effected by a composition comprising a major amount of an oil of lubricating viscosity containing at least 50 mass % of a Group II basestock, and respective minor amounts of an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent other than such a detergent having a basicity index of less than two and a degree of carbonation of 80% or greater and 5 to 500 mass %, based on the mass of the detergent, of an oil-soluble alkyl-substituted phenol other than a hindered phenol. Asphaltene precipitation in the lubricant, caused by the presence of contaminant heavy fuel oil, is prevented or inhibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.