SYSTEM AND METHOD FOR DETECTING ENGINE EVENTS WITH AN ACOUSTIC SENSOR
First Claim
1. A system for detecting engine events comprising:
- an engine assembly;
an acoustic emission sensor mounted on the engine assembly and configured to provide a signal indicative of acoustic emissions in the engine assembly during an engine cycle;
a controller operatively connected to the acoustic emission sensor to receive the signal;
wherein the controller has a processor configured to execute stored instructions, and is programmed to;
convert the signal into one or more frequency components;
filter the signal with a band pass filter to eliminate any of the frequency components outside of a range of frequencies of the band pass filter;
determine a power value of each of the one or more frequency components within the range of frequencies of the band pass filter;
compare the power value of each of the one or more frequency components to a reference value associated with acoustic emissions in the engine assembly during a baseline engine cycle; and
adjust at least one operating parameter of the engine assembly if the power value differs from the reference value by at least a predetermined amount.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for detecting engine events includes an engine assembly, and an acoustic emission sensor mounted on the engine assembly. A controller has a processor configured to execute stored instructions and is programmed to convert the signal into one or more frequency components, filter the signal with a band pass filter and determine a power value of each of the one or more frequency components within the range of frequencies of the band pass filter. The controller then compares the power value of each of the one or more frequency components to a reference value associated with acoustic emissions in the engine assembly during a baseline engine cycle. The controller adjusts at least one operating parameter of the engine assembly if the power value differs from the reference value by at least a predetermined amount. A corresponding method of controlling an engine assembly is disclosed.
-
Citations
19 Claims
-
1. A system for detecting engine events comprising:
-
an engine assembly; an acoustic emission sensor mounted on the engine assembly and configured to provide a signal indicative of acoustic emissions in the engine assembly during an engine cycle; a controller operatively connected to the acoustic emission sensor to receive the signal;
wherein the controller has a processor configured to execute stored instructions, and is programmed to;convert the signal into one or more frequency components; filter the signal with a band pass filter to eliminate any of the frequency components outside of a range of frequencies of the band pass filter; determine a power value of each of the one or more frequency components within the range of frequencies of the band pass filter; compare the power value of each of the one or more frequency components to a reference value associated with acoustic emissions in the engine assembly during a baseline engine cycle; and adjust at least one operating parameter of the engine assembly if the power value differs from the reference value by at least a predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A system for detecting engine events comprising:
-
an engine assembly; an acoustic emission sensor mounted on the engine assembly and configured to provide a signal indicative of acoustic emissions in the engine assembly during an engine cycle; a controller operatively connected to the acoustic emission sensor to receive the signal;
wherein the controller has a processor configured to execute stored instructions, and is programmed to;convert only selected portions of the signal into one or more frequency components;
wherein the selected portions of the signal are at different specific ranges of engine crank angles;filter the signal with a band pass filter; determine a respective power value of any of the one or more frequency components of the selected portions of the signal that are within different specific ranges of frequencies;
wherein the selected portions of the signal in the different specific range of engine crank angles and the different specific ranges of frequencies are characteristic of different specific engine events;compare the respective power value to a respective reference value associated with acoustic emissions in the engine assembly during a baseline engine cycle; and adjust at least one operating parameter of the engine assembly if a difference between the respective power value and the respective reference value is greater than a predetermined difference. - View Dependent Claims (14, 15, 16, 17)
-
-
18. A method for detecting engine events comprising:
-
converting a signal indicative of acoustic emissions in an engine assembly during an engine cycle into one or more frequency components;
wherein the signal is provided by an acoustic sensor mounted on the engine assembly;filtering the signal with a band pass filter to eliminate any of the one or more frequency components outside of a range of frequencies of the band pass filter; determining a power value of each of the one or more frequency components within the range of frequencies of the band pass filter; comparing the power value of each of the one or more frequency components to a respective reference value associated with acoustic emissions in the engine assembly during a baseline engine cycle; and adjusting at least one operating parameter of the engine assembly if a difference between the power value and the reference value is greater than a predetermined threshold difference. - View Dependent Claims (19)
-
Specification