Method and apparatus for determining a normal combustion characteristic for an internal combustion engine from an accelerometer signal
The method comprises operating a calibration engine, and collecting combustion characteristic data and reference accelerometer signals, which are correlated with each other and stored in a calibration table. The calibration table can be used by an engine to determine a real-time normal combustion characteristic when the engine is operating by collecting a real-time accelerometer sensor signal and cross correlating with the correlated data stored in the calibration table. Accordingly, the apparatus comprises a calibration engine comprising a calibration sensor, a reference accelerometer sensor and a data storage device for storing the collected calibration data that is correlated with the collected reference accelerometer signals, and an engine equipped with an accelerometer sensor, a calibration table and an electronic engine controller programmed to receive real-time accelerometer signals and cross correlate them with reference accelerometer signals to determine a real-time normal combustion characteristic.
- Research Organization:
- Westport Power Inc., Vancouver, BC (Canada)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-06NT42967
- Assignee:
- Westport Power Inc. (Vancouver, BC, CA)
- Patent Number(s):
- 8,078,389
- Application Number:
- 12/788,273
- OSTI ID:
- 1531708
- Country of Publication:
- United States
- Language:
- English
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