Lubricant for hydrogen-fueled engines

C - Chemistry – Metallurgy – 10 – M

Patent

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C10M 169/04 (2006.01)

Patent

CA 2672626

A lubricant composition of a synthetic oil of lubricating viscosity, 3 to 6 percent by weight of a nitrogen-containing dispersant, 1 to 2.5 weight percent of an overbased magnesium detergent, 1 to 5 weight percent of an antioxidant; and 0.25 to 1.5 weight percent of a friction modifier is useful for lubricating a hydrogen-fueled engine. The composition will typically contain less than 0.01 weight percent Ca, less than 0.01 weight percent Zn, less than 0.06 weight percent P, and will have a sulfated ash level of less than 1.2%.

L'invention concerne une composition lubrifiante d'une huile synthétique ayant une viscosité de lubrification, 3 à 6 pour cent en poids d'un agent de dispersion contenant de l'azote, 1 à 2,5 pour cent en poids d'un détergent de magnésium surbasé, 1 à 5 pour cent en poids d'un antioxydant ; et 0,25 à 1,5 pour cent en poids d'un modificateur de frottement, utile pour lubrifier un moteur à hydrogène. La composition contient typiquement moins de 0,01 pour cent en poids de Ca, moins de 0,01 pour cent en poids de Zn, moins de 0,06 pour cent en poids de P et présente un niveau de cendres sulfatées inférieur à 1,2 %.

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