TEMPERATURE MEASUREMENTS IN A PIEZOELECTRIC PRESSURE TRANSDUCER FITTED IN THE COMBUSTION CHAMBER OF AN OTTO ENGINE

Piezo-electric pressure transducers have been utilized since more than 40 years measuring the in-cylinder pressures of combustion engines. During the last ten years decisive progress in fast, process-computer controlled high speed data acquisition systems with improved accuracy and resolution and a multitude of application-oriented evaluation programmes has been made. Yet there is no "breaktrough" for a wide use of this measurement procedure as actually required in the field of engine research and development. Mainly two reasons are supposed for this lack of use: First there are still relatively high expenses for preparation, performance and evaluation of those measurements. Second, there is a low confidence in the accuracy of this measurement technique. Apart from procedure errors now the pressure transducer itself is the weakest link in the measurement chain. Errors concerning the measurement procedure and the transducer have been described in several publications. This paper presents the results of temperature measurements in a pressure transducer dummy equipped with fast thermocouples at two different positions in the combustion chamber of a spark ignition engine.

Media Info

  • Features: Figures;
  • Pagination: p. 459-485

Subject/Index Terms

Filing Info

  • Accession Number: 00399904
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: ISATA 84027, HS-038 445
  • Files: HSL, USDOT
  • Created Date: Oct 31 1985 12:00AM