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The application of thick-film peizoresistive technology for combustion pressure sensing

The application of thick-film peizoresistive technology for combustion pressure sensing
The application of thick-film peizoresistive technology for combustion pressure sensing
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.
Fawcett, Nigel
f76a7824-04a8-47ed-97be-8d11bb51aaf8
Fawcett, Nigel
f76a7824-04a8-47ed-97be-8d11bb51aaf8

Fawcett, Nigel (1999) The application of thick-film peizoresistive technology for combustion pressure sensing. University of Southampton, School of Engineering Sciences, Doctoral Thesis.

Record type: Thesis (Doctoral)

Abstract

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.

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Published date: 1999
Organisations: University of Southampton

Identifiers

Local EPrints ID: 47564
URI: http://eprints.soton.ac.uk/id/eprint/47564
PURE UUID: d2cbd2d0-8b88-493b-9114-b6cacd6240d4

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Date deposited: 07 Aug 2007
Last modified: 13 Mar 2019 20:59

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