SYSTEM AND METHOD FOR DIAGNOSING AN ENGINE
First Claim
Patent Images
1. A method for an engine including a crankcase, comprising:
- diagnosing a condition of the engine based on frequency content of a measured crankcase pressure.
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Abstract
Methods and systems are provided for an engine including a crankcase. A condition of the engine may be diagnosed based on frequency content of crankcase pressure. Different types of degradation may be distinguished based on a frequency content of multiple frequencies of the crankcase pressure. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.
59 Citations
21 Claims
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1. A method for an engine including a crankcase, comprising:
diagnosing a condition of the engine based on frequency content of a measured crankcase pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for an engine including a crankcase enclosing a crankshaft, comprising:
distinguishing between different types of degradation based on a frequency content of a measured crankcase pressure. - View Dependent Claims (14, 15, 16, 17)
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18. A vehicle system, comprising:
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an engine including a crankcase, a crankcase pressure sensor, and a crankshaft enclosed by the crankcase; and a controller including instructions configured to; sample and transform a signal from the crankcase pressure sensor to identify frequency content of the crankcase pressure; diagnose a condition of the engine based on the frequency content of the crankcase pressure; and adjust an engine operating parameter based on the diagnosed condition. - View Dependent Claims (19)
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20. A test kit, comprising:
a controller that is operable to determine a condition of an engine based on a frequency content of pressure readings of a crankcase associated with the engine. - View Dependent Claims (21)
Specification