Detection of Engine Intake Manifold Air-Leaks
First Claim
Patent Images
1. A method comprising:
- measuring an air flow rate into an internal combustion engine;
comparing said measured air flow rate to a first predetermined air flow limit;
calculating an estimated air flow rate into said engine when said measured air flow rate is less than said first predetermined air flow limit;
comparing said estimated air flow rate to second and third predetermined air flow limits; and
indicating an air leak when said estimated air flow rate is greater than said second predetermined air flow limit, and less than said third predetermined air flow limit.
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Abstract
A method of determining an engine intake air leak may include measuring an air flow rate into an internal combustion engine, comparing the measured air flow rate to a first predetermined air flow limit, calculating an estimated air flow rate into the engine when the measured air flow rate is less than the first predetermined air flow limit, comparing the estimated air flow rate to second and third predetermined air flow limits, and indicating an air leak when the estimated air flow rate is greater than the second predetermined air flow limit and less than the third predetermined air flow limit.
35 Citations
20 Claims
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1. A method comprising:
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measuring an air flow rate into an internal combustion engine; comparing said measured air flow rate to a first predetermined air flow limit; calculating an estimated air flow rate into said engine when said measured air flow rate is less than said first predetermined air flow limit; comparing said estimated air flow rate to second and third predetermined air flow limits; and indicating an air leak when said estimated air flow rate is greater than said second predetermined air flow limit, and less than said third predetermined air flow limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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measuring an air flow rate into an internal combustion engine; comparing said measured air flow rate to a first predetermined air flow limit; calculating an estimated air flow rate into said engine when said measured air flow rate is less than said first predetermined air flow limit; comparing said estimated air flow rate to second and third predetermined air flow limits; and controlling an amount of fuel supplied to said engine based on said estimated air flow rate when said estimated air flow rate is greater than said second predetermined air flow limit and less than said third predetermined air flow limit. - View Dependent Claims (12, 13, 14, 15)
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16. A control module comprising:
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an air flow measurement module that measures an air flow rate into an internal combustion engine; an air flow calculation module that calculates an estimated air flow rate into said engine; and an air leak determination module in communication with said air flow measurement module and said air flow calculation module that determines an air leak condition in an intake system of said engine when said measured air flow rate is less than a first predetermined air flow limit and said estimated air flow rate is greater than a second predetermined air flow limit and less than a third predetermined air flow limit. - View Dependent Claims (17, 18, 19, 20)
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Specification