Method and apparatus for using an accelerometer signal to detect misfiring in an internal combustion engine
The method comprises operating an engine and collecting a real-time accelerometer signal from an accelerometer sensor. The real-time accelerometer signal is digitized and filtered to isolate data in a frequency range associated with combustion to produce a filtered signal data set. The filtered signal data set is integrated to produce an integrated signal data set, and misfire is detected by comparing the integrated signal data set with a predetermined reference data set associated with the same operating point. The apparatus is a control system for an engine that comprises an accelerometer sensor mounted to the engine; a look-up table in which is stored predetermined reference data sets, in association with predetermined operating conditions; and an electronic controller programmed to carry out the foregoing method.
- Research Organization:
- Westport Power Inc., West Vancouver, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-06NT42967
- Assignee:
- Westport Power Inc. (West Vancouver, CA)
- Patent Number(s):
- 8,108,131
- Application Number:
- 12/788,276
- OSTI ID:
- 1531837
- Country of Publication:
- United States
- Language:
- English
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