Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay
Abstract
A method comprises steps for reconstructing in-cylinder pressure data from a vibration signal collected from a vibration sensor mounted on an engine component where it can generate a signal with a high signal-to-noise ratio, and correcting the vibration signal for errors introduced by vibration signal charge decay and sensor sensitivity. The correction factors are determined as a function of estimated motoring pressure and the measured vibration signal itself with each of these being associated with the same engine cycle. Accordingly, the method corrects for charge decay and changes in sensor sensitivity responsive to different engine conditions to allow greater accuracy in the reconstructed in-cylinder pressure data. An apparatus is also disclosed for practicing the disclosed method, comprising a vibration sensor, a data acquisition unit for receiving the vibration signal, a computer processing unit for processing the acquired signal and a controller for controlling the engine operation based on the reconstructed in-cylinder pressure.
- Inventors:
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1083048
- Patent Number(s):
- 8396649
- Application Number:
- 13/360,519
- Assignee:
- Westport Power Inc. (Vancouver, British Columbia, CA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
- DOE Contract Number:
- FC26-06NT42967
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Huang, Jian. Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay. United States: N. p., 2013.
Web.
Huang, Jian. Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay. United States.
Huang, Jian. Tue .
"Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay". United States. https://www.osti.gov/servlets/purl/1083048.
@article{osti_1083048,
title = {Method and apparatus for reconstructing in-cylinder pressure and correcting for signal decay},
author = {Huang, Jian},
abstractNote = {A method comprises steps for reconstructing in-cylinder pressure data from a vibration signal collected from a vibration sensor mounted on an engine component where it can generate a signal with a high signal-to-noise ratio, and correcting the vibration signal for errors introduced by vibration signal charge decay and sensor sensitivity. The correction factors are determined as a function of estimated motoring pressure and the measured vibration signal itself with each of these being associated with the same engine cycle. Accordingly, the method corrects for charge decay and changes in sensor sensitivity responsive to different engine conditions to allow greater accuracy in the reconstructed in-cylinder pressure data. An apparatus is also disclosed for practicing the disclosed method, comprising a vibration sensor, a data acquisition unit for receiving the vibration signal, a computer processing unit for processing the acquired signal and a controller for controlling the engine operation based on the reconstructed in-cylinder pressure.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 12 00:00:00 EDT 2013},
month = {Tue Mar 12 00:00:00 EDT 2013}
}
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