Systems and methods for detection of engine component conditions via external sensors

1. A method, comprising:

receiving a plurality of signals representative of an engine noise transmitted via a plurality of noise sensors, wherein the noise sensors are disposed in a grid about an engine;

receiving a knock sensor signal representative of an engine noise transmitted via a knock sensor;

deriving a combustion event based on the knock sensor signal;

deriving an engine condition based on the plurality of signals and the combustion event; and

communicating the engine condition.

2. The method of claim 1 , wherein deriving the engine condition based on the on the plurality of signals and the combustion event comprises a sequential processing of data so the knock sensor signal is processed at a first time and the plurality of signals is processed at a second time after the first time.

3. The method of claim 1 , comprising receiving a crank angle signal representative of a position of a crankshaft, and wherein deriving the engine condition comprises deriving the engine condition based on the plurality of signals, the combustion event, and the position of the crankshaft.

4. The method of claim 1 , wherein the grid comprises a non-circular grid.

5. The method of claim 1 , wherein deriving the engine condition based on the plurality of signals comprises applying a 3-dimensional (3D) spectrographic analysis to the plurality of signals.

6. The method of claim 5 , wherein applying the 3D spectrographic analysis comprises dividing data from received from the plurality of noise sensors into a plurality of subgrid data sections via a time dimension.

7. The method of claim 6 , wherein each of the subgrid data sections comprises a noise corresponding to a cylinder combustion event received at increasing times.

8. The method of claim 1 , wherein deriving the engine condition comprises applying a normative baselining analysis to the plurality of signals, applying a condition-based analysis to the plurality of signals, or a combination thereof.

9. The method of claim 1 , wherein deriving the engine condition comprises operating the engine at a transient state and observing transient state operations via the plurality of noise sensors.

10. A system, comprising:

an engine control system comprising a processor configured to:

receive a plurality of signals representative of an engine noise transmitted via a plurality of noise sensors, wherein the noise sensors are disposed in a grid about an engine;

receive a knock sensor signal representative of an engine noise transmitted via a knock sensor;

derive a combustion event based on the knock sensor signal;

derive an engine condition based on the plurality of signals and the combustion event;

communicate the engine condition; and

control operations of the engine.

11. The system of claim 10 , wherein the processor is configured to control operations of the engine at a transient state to provide for transient state data to the plurality of noise sensors.

12. The system of claim 11 , wherein the transient state comprises applying an RPM ramp rate, an engine spark timing change, a fuel injection sweep rate, an engine load change, or a combination thereof.

13. The system of claim 10 , correlating the engine condition to the signal comprises verifying that the component was at a second position during engine operations by querying the lookup table.

14. The system of claim 10 , wherein the processor is configured to receive a crank angle signal representative of a position of a crankshaft, and wherein deriving the engine condition comprises deriving the engine condition based on the plurality of signals, the combustion event, and the position of the crankshaft.

15. The system of claim 10 , wherein the processor is configured to derive the engine condition based on the plurality of signals by applying a 3-dimensional (3D) spectrographic analysis to the plurality of signals.

16. The system of claim 10 , comprising the grid, wherein the grid comprises a non-circular grid.

17. A tangible, non-transitory computer readable medium storing code configured to cause a processor to:

receive a plurality of signals representative of an engine noise transmitted via a plurality of noise sensors, wherein the noise sensors are disposed in a grid about an engine;

receive a knock sensor signal representative of an engine noise transmitted via a knock sensor;

derive a combustion event based on the knock sensor signal;

derive an engine condition based on the plurality of signals and the combustion event;

communicate the engine condition.

18. The tangible, non-transitory computer readable medium of claim 17 , wherein the code configured to cause the processor to derive the engine condition based on the on the plurality of signals and the combustion event comprise code configured to cause the processor to sequentially process data so the knock sensor signal is processed at a first time and the plurality of signals is processed at a second time after the first time.

19. The tangible, non-transitory computer readable medium of claim 17 , wherein the code is configured to cause the processor to receive a crank angle signal representative of a position of a crankshaft, and wherein deriving the engine condition comprises deriving the engine condition based on the plurality of signals, the combustion event, and the position of the crankshaft.

20. The tangible, non-transitory computer readable medium of claim 17 , wherein the code configured to cause the processor to derive the engine condition comprises code configured to cause the processor to apply a normative baselining analysis to the plurality of signals, apply a condition-based analysis to the plurality of signals, or a combination thereof.