System and method for reducing knock and preignition in an internal combustion engine
AssigneeFord Global Technologies, LLC
InventorGopichandra Surnilla
Life of this patent
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Abstract
A system for an engine of a vehicle, comprising of a combustion chamber located in the engine; a delivery system configured to deliver a fuel and a fluid to at least the combustion chamber in varying ratios, wherein the fluid includes at least an alcohol; wherein the delivery system includes at least a direct injector configured to inject at least the fluid directly into the combustion chamber; and a control system configured to advance the timing of the fluid delivered to the combustion chamber by the direct injector to reduce the likelihood of knock; and retard the timing of the fluid delivered to the combustion chamber by the direct injector to reduce the likelihood of preignition.
Claims20
A system for an engine of a vehicle, comprising:
- a combustion chamber located in the engine;
- a delivery system configured to deliver a fuel and a fluid to at least the combustion chamber in varying ratios, wherein the fluid includes at least an alcohol;
- wherein the delivery system includes at least a direct injector configured to inject at least the fluid directly into the combustion chamber;
- and
- a control system configured to advance the timing of the fluid delivered to the combustion chamber by the direct injector to reduce the likelihood of knock;
- and
- retard the timing of the fluid delivered to the combustion chamber by the direct injector to reduce the likelihood of preignition.
A method for controlling engine operation, comprising:
- delivering an amount of a hydrocarbon fuel and an amount of an alcohol to a cylinder of the engine, where at least said amount of alcohol is delivered at a timing relative to a position of the piston;
- and
- varying said timing as said amount of alcohol varies, said varying including advancing the timing of the delivery of said amount of alcohol as said amount decreases, and retarding the timing of the delivery of said amount of alcohol as said amount increases.
A method for controlling engine operation, comprising:
- delivering an amount of a hydrocarbon fuel and an amount of an alcohol to a cylinder of the engine, where at least said first amount of alcohol is delivered at a timing relative to piston position;
- and
- varying said amount of alcohol as said timing varies, said varying including reducing said amount of alcohol as said timing is advanced and increasing said amount of alcohol as said timing is retarded.
A system for an engine of a vehicle, comprising:
- a combustion chamber having a piston disposed therein;
- a delivery system configured to deliver a fuel and a fluid to at least the combustion chamber in varying ratios, wherein the fluid includes at least an alcohol;
- wherein the delivery system includes at least a direct injector configured to inject at least the fluid directly to the combustion chamber;
- a detection system configured to detect at least one of knock and preignition within the combustion chamber;
- and
- a control system configured to control the delivery system so that
- during a first condition of the detection system, performing a first number of injections of the fluid into the combustion chamber per cycle;
- and
- during a second condition of the detection system, performing a second number of injections of the fluid into the combustion chamber per cycle.
Dependencies are inferred from the claim text.