The application of thick-film peizoresistive technology for combustion pressure sensing
Fawcett, Nigel (1999) The application of thick-film peizoresistive technology for combustion pressure sensing. University of Southampton, School of Engineering Sciences, Doctoral Thesis .
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This thesis identifies the benefits offered by combustion pressure measurement in petrol engines to real-time engine control. Benefits include reduced exhaust emissions and better engine performance. The various techniques used for combustion pressure measurement are reviewed, and thick-film piezoresistive technology is identified as a technology capable of producing a low cost sensor.
Two possible locations for. the thick-film pressure sensor are experimentally investigated, both on the spark plug.
The piezoresistive material chosen is Heraeus 8241, a widely used material based on jt ruthenium dioxide particles in a glass matrix. Properties relevant to the construction of a combustion pressure sensor are evaluated; the elastic modulus is measured for the first time between 173 and 573K, and piezoresistivity is measured for the first time between 77 and 533K. The response of thick-film piezoresistors to hydrostatic pressure is investigated.
A spark plug sensor is constructed, calibrated and engine tested. The detection of the angle of peak pressure, magnitude of peak pressure and knock is demonstrated.
|Item Type:||Thesis (Doctoral)|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||07 Aug 2007|
|Last Modified:||02 Mar 2012 13:30|
|Contributors:||Fawcett, Nigel (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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