Lubricant compositions for direct injection engines
US10494584B2 · kind B2 · utility
1Cited by
0References
10Claims
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Assignee
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Key dates
| Filing date | Sep 19, 2014 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Sep 19, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention is directed to a method for reducing low speed pre-ignition events in a spark-ignited direct injection internal combustion engine by supplying to the sump a lubricant composition which contains an oil of lubricating viscosity and a metal overbased detergent. The metal overbased detergent may be selected from sulfonate detergents, phenate detergents, and salicylate detergents, especially sulfonate detergents with a metal ratio of at least 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.