Fuel products comprising a lead scavenger
AssigneeThe Lubrizol Corporation
InventorsThomas E. Johnston, Casper J. Dorer, Jr.
Life of this patent
Estimating the term…
Abstract
A fuel composition for internal combustion engines, and more particularly, a fuel composition for internal combustion engines containing less than about 0.5 gram of lead per gallon of fuel is described. The fuel provides acceptable valve seat protection in engines designed to operate on leaded fuels. A further aspect of the invention is to reduce deposit formation within the cylinders.
Claims75
An unleaded fuel composition for an internal combustion engine comprising a major portion of a liquid hydrocarbon fuel and a minor amount of:
- (a) a hydrocarbon soluble alkali metal or alkaline earth metal containing composition;
- and
- (b) a lead scavenger.
A fuel composition for internal combustion engines comprising a major amount of a liquid hydrocarbon fuel and a minor amount of
- (a) a hydrocarbon-soluble alkali or alkaline earth metal containing composition and
- (b) a hydrocarbon-soluble member selected from the group consisting of aluminum containing compositions, silicon containing compositions, molybdenum containing compositions, lithium containing compositions, calcium containing compositions, magnesium containing compositions and mixtures thereof.
A fuel composition for internal combustion engines comprising a major amount of a liquid hydrocarbon fuel and minor amount of
- (a) a hydrocarbon-soluble alkali or alkaline earth metal containing composition and
- (b) a hydrocarbon-soluble transition metal containing composition.
A concentrate suitable for use in a fuel containing:
- (a) a hydrocarbon soluble alkali metal or alkaline earth metal salt;
- (b) a member selected from the group consisting of:
- (1) a lead scavenger;
- (2) A hydrocarbon-soluble member selected from the group consisting of aluminum containing compositions, silicon containing compositions, molybdenum containing compositions, lithium containing compositions, calcium containing compositions, magnesium containing compositions and mixtures thereof;
- and
- (3) a hydrocarbon-soluble transition metal containing composition and mixtures thereof, and
- (c) a fuel-soluble or dispersible organic diluent.
A process for reducing valve seat recession by including in an unleaded fuel a hydrocarbon soluble alkali metal or alkaline earth metal containing composition in an amount sufficient to lessen valve seat recession, and a sufficient amount of a scavenger compound capable of lessening the formation of deposits of the alkali metal or alkaline earth metal within the combustion cylinder.
Dependencies are inferred from the claim text.