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 an ashless antioxidant. The ashless antioxidant may be selected from phenolic compounds, aryl amine compounds, and sulfurized olefins, especially 2,6-hindered phenols and diarylamine compounds.
本发明涉及一种减少火花点火式直喷内燃机低速预点火事件的方法,其方法是向油底壳供应一种润滑油组合物,该组合物含有一种润滑粘度油和一种无灰
抗氧化剂。无灰
抗氧化剂可选自
酚类化合物、芳基胺化合物和
硫化烯烃,尤其是 2,6 受阻
酚和二芳基胺化合物。