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Development of a Multi-Sensors Head Gasket for Knock Localization
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 03, 2003 by SAE International in United States
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In order to determine the area where knock occurs in a single cylinder engine, an acoustic methodology needs a minimum of four simultaneous pressure measurements in the combustion chamber. A specific cylinder head gasket integrating 12 pressure sensors has been developed and tested. The gasket is based on a bonded multilayer technology including high temperature piezoelectric cells, metallic and insulating sheets and printed circuit films. The total thickness is close to 1.25 mm (1/20 inch) and allows a straight forward substitution of the original gasket without modification. The sensors have large frequency bandwidth (typically 3-100 kHz) and withstand severe conditions (heat, combustion, pressure, vibrations, static pre-stress, electromagnetic fields and shocks). Signal processing adaptation of the dedicated exploitation software has brought good success for the single cylinder prototype, which remains operational after 100 hours of extreme conditions running (high knock). The technology is currently under development for multi cylinder industrial engines, with 4 to 8 sensors per cylinder.
|Technical Paper||Analysis of Local Pressures, Surface Temperatures and Engine Damages under Knock Conditions|
|Technical Paper||Squish Velocity in the Combustion Chamber of a 2-Stroke Cycle Engine|
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CitationMazoyer, T., Fayet, P., Castagné, M., and Dumas, J., "Development of a Multi-Sensors Head Gasket for Knock Localization," SAE Technical Paper 2003-01-1117, 2003, https://doi.org/10.4271/2003-01-1117.
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