发明名称 |
METHOD FOR PREVENTING EXHAUST VALVE SEAT RECESSION |
摘要 |
A method for preventing or inhibiting exhaust valve seat recession in a natural gas fueled internal combustion engine is disclosed. The method involves lubricating the engine with a lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity, and (b) a minor amount of a natural gas engine oil additive package, wherein the lubricating oil composition is substantially free of each of any zinc compounds and alkaline earth metal salts of a condensation product of an alkylene polyamine, an aldehyde and a substituted phenol. |
申请公布号 |
EP2398878(A4) |
申请公布日期 |
2012.07.18 |
申请号 |
EP20100744247 |
申请日期 |
2010.02.17 |
申请人 |
CHEVRON ORONITE COMPANY LLC |
发明人 |
TOBIAS, MELANIE F.;VON STADEN, JON F. |
分类号 |
F01N3/00;C10M163/00;C10N30/06;C10N40/25 |
主分类号 |
F01N3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|