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US 11,598,307 B1Granted
Method and system for improving fouled spark plug detection
AssigneeFord Global Technologies, LLC
InventorsQiuping Qu, Rani Kiwan, Robert Sarow Baskins, Chris Paul Glugla, Imtiaz Ali
Life of this patent
Estimating the term…
Abstract
Methods and systems to determine a presence or absence of engine misfire or spark plug fouling are presented. In one example, rates of change in engine speed are arranged in engine data blocks and root mean square values for the rates of change in engine speed are determined. The presence or absence of engine misfire or spark plug fouling may be based at least in part on the root mean square values.
Claims19
A method for operating an engine, comprising:
- generating a group of average values comprising an average value for each cylinder of the engine, the average value for each cylinder of the engine generated via averaging a group of consecutively generated root mean square values;
- generating a maximum value from the group of average values;
- adjusting operation of the engine in response to the maximum value;
- and
- adjusting a shift schedule of a transmission in response to the maximum value exceeding a threshold value.
2 more elements
A system for operating an engine, comprising:
- an internal combustion engine;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to generating a group of root mean square values comprising a root mean square value for each cylinder of the engine, generating a maximum value from the group of root mean square values;
- and to adjust operation of the internal combustion engine in response to an average value determined from a group of maximum values that includes the maximum value, where adjusting operation of the internal combustion engine includes increasing engine speed.
1 more element
A method for operating an engine, comprising:
- generating a group of engine data blocks;
- generating a root mean square value from the group of engine data blocks;
- generating an average value from a group of root mean square values that includes the root mean square value;
- and
- adjusting operation of the engine in response to the average value, where adjusting operation of the engine includes increasing engine load.
2 more elements
Dependencies are inferred from the claim text.