This invention relates to compositions for improving fuel efficiency in internal combustion engines. The composition comprises a lubricant having an oil of lubricating viscosity and (A) a compound represented by the formula
wherein in Formula (A-I), R1, R2, R3 and R4 are independently hydrocarbyl groups, X1 and X2 are independently O or S, and n is zero to 3; and (B) an acylated nitrogen-containing compound having a substituent of at least 10 aliphatic carbon atoms. In one embodiment, the inventive composition further comprises (C) a second phosphorus compound other than (A), said second phosphorus compound being a phosphorus acid, phosphorus acid ester, phosphorus acid salt, or derivative thereof. In one embodiment, the inventive composition further comprises (D) an alkali or alkaline earth metal salt of an organic sulfur acid, carboxylic acid or phenol. In one embodiment, the inventive composition further comprises (E) a thiocarbamate. These compositions are useful in providing lubricating compositions and fractional fluids with enhanced fuel efficiency properties.
本发明涉及用于提高内燃机燃油效率的组合物。该组合物包括具有润滑粘度的润滑油和 (A) 由式表示的化合物
其中,在式 (A-I)中,R1、R2、R3 和 R4 独立地为烃基,X1 和 X2 独立地为 O 或 S,且 n 为 0 至 3;以及 (B) 具有至少 10 个脂肪族碳原子取代基的酰化
含氮化合物。在一个实施方案中,本发明组合物进一步包含(C)除(A)之外的第二种
磷化合物,所述第二种
磷化合物为
磷酸、
磷酸酯、
磷酸盐或其衍
生物。在一个实施方案中,本发明组合物还包括 (D) 有机
硫酸、
羧酸或
苯酚的碱
金属或碱土
金属盐。在一个实施方案中,本发明组合物还包括 (E)
硫代
氨基甲酸酯。这些组合物有助于提供具有更高燃油效率特性的润滑组合物和馏分油。