C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
C10L 1/22 (2006.01) C10L 1/14 (2006.01) C10L 1/238 (2006.01) C10L 10/00 (2006.01) F02B 77/04 (2006.01)
Patent
CA 2224450
A method to prevent intake valve sticking, or to reduce or eliminate intake valve sticking when it has already occurred, in an internal combustion engine which comprises contacting the engine intake valves with a fuel composition comprising a major amount of hydrocarbons boiling in the gasoline range and an amount effective to prevent, reduce or eliminate intake valve sticking of a hydrocarbyl poly(oxyalkylene) aminocarbamate having at least one basic nitrogen atom and an average molecular weight of about 500 to about 10,000, and wherein the hydrocarbyl group has from 1 to about 30 carbon atoms.
Méthode destinée à empêcher, dans les moteurs à combustion interne, l'adhérence des soupapes, ou à réduire ou éliminer l'adhérence de la soupape d'admission s'il y a déjà adhérence; elle est basée sur l'injection dans les soupapes d'admission d'un carburant dont l'ingrédient principal est un mélange d'hydrocarbures dont la plage d'ébullition est celle de l'essence et une quantité suffisante pour empêcher, réduire ou éliminer l'adhérence des soupapes d'un composé de type hydrocarbylpoly(oxyalkylène) aminocarbamate ayant au moins un azote basique et un poids moléculaire moyen d'environ 500 à environ 10 000, et dont le groupe hydrocarbyle comporte de de 1 à environ 30 atomes de carbone. .
Chevron Chemical Company
Sim & Mcburney
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