| 摘要 |
A lubricant comprising (a) an oil of lubricating viscosity; (b) a polyether of number average molecular weight 1000 to 10,000; said polyether comprising alkylene oxide monomer units, where the alkylene group contains 3 to 6 carbon atoms, and ethylene oxide monomer units; and (c) one or more anti-foam agents, where the lubricant has a sulfated ash content of less than about 0.7 percent, is useful for lubricating a stationary gas engine where the engine drives a compressor and where both the engine and the compressor are lubricated with the same lubricant. |
| 主权项 |
1. A method for lubricating a sump-lubricated, compression-ignited stationary gas engine wherein the engine drives a compressor and wherein both the engine and the compressor are lubricated with the same lubricant, comprising supplying to said engine a lubricant comprising:
(a) an oil of lubricating viscosity; (b) about 0.02 to about 0.5 percent by weight a polyether, a polyetheramine, or mixtures thereof, of number average molecular weight about 1000 to about 10,000; said polyether, polyetheramine, or mixtures thereof comprising alkylene oxide monomer units, where the alkylene group contains 3 to 6 carbon atoms, and ethylene oxide monomer units; (c) about 10 to about 300 parts per million by weight of one or more anti-foam agents; and (g) about 0.5 to about 5 percent by weight of a metal-containing detergent; wherein said lubricant has a sulfated ash content of about 0.01 percent to less than about 0.7 percent; and wherein said lubricant is also used to lubricate the compressor that is driven by the engine. |
