发明名称 |
METHOD FOR PREVENTING EXHAUST VALVE SEAT RECESSION |
摘要 |
<p>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.</p> |
申请公布号 |
SG173748(A1) |
申请公布日期 |
2011.09.29 |
申请号 |
SG20110059417 |
申请日期 |
2010.02.17 |
申请人 |
CHEVRON ORONITE COMPANY LLC |
发明人 |
TOBIAS, MELANIE F.;VON STADEN, JON F. |
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