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 |
WO2010096472(A3) |
申请公布日期 |
2010.11.18 |
申请号 |
WO2010US24460 |
申请日期 |
2010.02.17 |
申请人 |
CHEVRON ORONITE COMPANY LLC;TOBIAS, MELANIE F.;VON STADEN, JON F. |
发明人 |
TOBIAS, MELANIE F.;VON STADEN, JON F. |
分类号 |
C10M141/12;C10M169/04;C10N40/25;F01N3/00 |
主分类号 |
C10M141/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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