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US 2012/0266847 A1Published application
Method and System for Pre-Ignition Control
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Robert Sarow Baskins
Life of this patent
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Abstract
Methods and systems are provided for addressing cylinder pre-ignition by adjusting a spray angle of fuel injected into a cylinder responsive to an indication of pre-ignition. A spray pattern of fuel injected in the cylinder is varied based on a cylinder pre-ignition count to reduce cylinder wall impingement of injected fuel while improving air-fuel mixing in the cylinder.
Claims20
1-20. (canceled)
A method of operating an engine including a fuel injector, comprising,
- direct injecting fuel from the fuel injector into a cylinder of the engine;
- and
- adjusting a spray angle of the injected fuel based on an indication of pre-ignition.
A method, comprising:
- operating an engine including a first cylinder with a first higher pre-ignition count and a second cylinder with a second, lower pre-ignition count;
- direct injecting fuel in the first cylinder at a first spray angle during an engine cycle based on the first pre-ignition count;
- and
- direct injecting fuel in the engine cycle in the second cylinder at a second, different spray angle based on the second pre-ignition count.
1 more element
A method of operating an engine including a fuel injector, comprising,
- direct injecting fuel from the fuel injector into a cylinder of the engine;
- adjusting a spray angle of the injected fuel based on an indication of pre-ignition;
- and
- in response to an occurrence of cylinder pre-ignition, increasing a pre-ignition count of the cylinder, enriching the cylinder, and further adjusting the spray angle based on the enrichment.
1 more element
Dependencies are inferred from the claim text.