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US 2010/0147263 A1Published application
First and second spark plugs for improved combustion control
AssigneeFord Global Technologies, LLC
InventorsJohn D. Russell, Michael Andri
Life of this patent
Estimating the term…
Abstract
An engine system includes two spark plugs in a cylinder of an engine. The two spark plugs have different heat ranges in order to address pre-ignition, where only a first spark plug operates during a first condition, and only a second spark plug operates during a second condition.
Claims14
1-20. (canceled)
A system, comprising:
- a cylinder;
- a first spark plug having a first heat range;
- a second spark plug having a second, different, heat range;
- a control system configured to deliver a hydrocarbon-fuel and an alcohol-fuel to the cylinder in varying ratios, and during a first condition, initiate combustion within the cylinder via only the first spark plug;
- and during a second condition, initiate combustion within the cylinder via only the second spark plug.
2 more elements
A system, comprising:
- a cylinder;
- a first spark plug having a first heat range;
- a second spark plug having a second, different, heat range;
- a control system configured to deliver a hydrocarbon-fuel and an alcohol-fuel to the cylinder in varying ratios, and during a first condition, initiate combustion within the cylinder via only the first spark plug;
- during a second condition, initiate combustion within the cylinder via only the second spark plug;
- and wherein during a third condition, operate the first spark plug to perform at least one spark and operate the second spark plug to perform at least one spark during a cycle of the cylinder.
3 more elements
A system, comprising:
- a cylinder;
- a first spark plug having a first heat range;
- a second spark plug having a second, different, heat range;
- a control system configured to deliver a hydrocarbon-fuel and an alcohol-fuel to the cylinder in varying ratios in response to preignition identified by ion sensing of one of the first and second spark plugs, and during a first condition, initiate combustion within the cylinder via only the first spark plug;
- and during a second condition, initiate combustion within the cylinder via only the second spark plug.
2 more elements
Dependencies are inferred from the claim text.