Method of operating internal combustion engine by...

Details Method of operating internal combustion engine by... Method of operating internal combustion engine by...

C - Chemistry, Metallurgy

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C10L 1/18 (2006.01) C10L 1/14 (2006.01) C10L 1/183 (2006.01) C10L 1/19 (2006.01) C10L 1/198 (2006.01) C10L 1/22 (2006.01) C10L 1/223 (2006.01) C10L 10/00 (2006.01) C10L 10/02 (2006.01) C10L 10/04 (2006.01)

Patent

CA 2483347

In a method of operating an internal combustion engine, an antioxidant composition is introduced into a combustion chamber of the engine. The antioxidant composition contains (A) a sterically hindered phenol; (B) an alkylene or alkylidene coupled sterically hindered phenol oligomer; (C) a secondary aromatic amine; (D) a reaction product of a hydrocarbyl-substituted hydroxy-containing aromatic compound, an aldehyde, and a carboxyl-substituted phenol; or (E) a mixture thereof. The method improves the performance of a lubricating oil of the engine.

Dans un procédé de fonctionnement d'un moteur à combustion interne, on introduit une composition antioxydante dans une chambre de combustion du moteur. Ladite composition antioxydante contient (A) un phénol à encombrement stérique; (B) un alkylène ou un alkylidène couplé à un oligomère de phénol à encombrement stérique; (C) une amine aromatique secondaire; (D) un produit réactionnel d'un composé aromatique contenant un hydroxy à substitution hydrocarbyle, un aldéhyde et un phénol à substitution carboxyle; ou (E) leur mélange. Le procédé permet d'améliorer les performances d'une huile lubrifiante pour moteur.

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