Apparatus and method to detect cylinder faults of internal combustion engines via exhaust temperature monitoring
First Claim
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1. A method for detecting a fault in a cylinder of an internal combustion engine, comprising the steps of:
- (a) collecting temperature data representative of temperatures of exhaust from the cylinder;
(b) estimating true temperatures of the exhaust as a function of the collected temperature data and at least one compensation factor;
(c) determining deviations of the estimated true temperatures from at least one reference value; and
(d) determining at least one severity symptom value for the cylinder as a function of the deviations determined, and comparing the at least one severity symptom value with at least one predetermined reference value for a known cylinder condition.
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Abstract
An apparatus and method for detecting cylinder faults collects temperature data representative of temperatures of exhaust from the cylinder, estimates true temperatures of the exhaust as a function of the collected temperature data and at least one compensation factor, and determines deviations of the estimated true temperatures from at least one reference value. At least one severity symptom value is determined as a function of the deviations, and compared with at least one predetermined reference value for a known cylinder condition.
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Citations
19 Claims
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1. A method for detecting a fault in a cylinder of an internal combustion engine, comprising the steps of:
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(a) collecting temperature data representative of temperatures of exhaust from the cylinder;
(b) estimating true temperatures of the exhaust as a function of the collected temperature data and at least one compensation factor;
(c) determining deviations of the estimated true temperatures from at least one reference value; and
(d) determining at least one severity symptom value for the cylinder as a function of the deviations determined, and comparing the at least one severity symptom value with at least one predetermined reference value for a known cylinder condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for detecting a fault in a cylinder of an internal combustion engine, comprising:
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an element for collecting temperature data representative of temperatures of exhaust from the cylinder;
an element for estimating true temperatures of the exhaust as a function of the collected temperature data and at least one compensation factor;
an element for determining deviations of the estimated true temperatures from at least one reference value; and
an element for determining at least one severity symptom value for the cylinder as a function of the deviations determined, and comparing the at least one severity symptom value with at least one predetermined reference value for a known cylinder condition. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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