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Title: Method and apparatus for determining a normal combustion characteristic for an internal combustion engine from an accelerometer signal

Patent ·
OSTI ID:1531708
; ;

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
Resource Relation:
Patent File Date: 2010-05-26
Country of Publication:
United States
Language:
English

References (14)

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Controller and control method for an internal combustion engine using an engine-mounted accelerometer patent August 2001
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System for providing a prognosis of future engine faults patent August 2001
Method of detecting knock in an internal combustion engine patent-application August 2004
Method and apparatus for pilot fuel introduction and controlling combustion in gaseous-fuelled internal combustion engine patent-application June 2004

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