Engine flush process and composition

Details Engine flush process and composition Engine flush process and composition

C - Chemistry, Metallurgy

10

M

C10M 169/04 (2006.01)

Patent

CA 2588998

An internal combustion engine can be cleaned of sludge, deposits, or wear debris, by supplying to lubricated surfaces of said engine a composition having kinematic viscosity of 1 to 10 mm2/s at 100~C comprising oil having at least 15% aromatics by ASTM D-2007, at least 205 weight percent of a nitrogen- containing dispersant, at least 0.6 weight percent of an overbased metal detergent, and at least about 0.5 weight percent of a metal salt of a phosphorus acid, circulating the composition through the engine and removing the composition from the engine.

La présente invention permet de débarrasser un moteur à combustion interne des impuretés, dépôts et fragments d'usure en appliquant sur ses surfaces lubrifiées une composition ayant une viscosité cinématique de 1 à 10 mm2/s à 100 °C et comprenant une huile à au moins 15 % d'hydrocarbures aromatiques selon ASTM D-2007, au moins 205 pour cent en poids d'un dispersant azoté, au moins 0,6 pour cent en poids d'un détergent métallique surbasique et au moins environ 0,5 pour cent en poids d'un sel métallique d'un acide phosphoreux, puis en faisant circuler ladite composition dans le moteur avant de l'en retirer.

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