This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Thermal Strain on Measurement of Cylinder Pressure
Annotation ability available
Sector:
Language:
English
Abstract
Cyclical exposure of a piezoelectric transducer to high temperature gas results in an error in the measured pressure due to thermal strain of the transducer diaphragm. Thermal strain results in a decrease in the measured values of IMEP and PMEP, while burn times calculated using the method of Rassweiler and Withrow are relatively unaffected. The severity of the effect can be minimized by coating the transducer diaphragm with RTV. When the effects of thermal strain persist into the intake stroke, a method of detection at low speed is to overlay and compare the firing and motoring intake stroke pressure traces.
Recommended Content
Authors
Citation
Stein, R., Mencik, D., and Warren, C., "Effect of Thermal Strain on Measurement of Cylinder Pressure," SAE Technical Paper 870455, 1987, https://doi.org/10.4271/870455.Also In
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel
Number: V96-4; Published: 1988-09-01
Number: V96-4; Published: 1988-09-01
References
- Lancaster D. R. Krieger R. B. Lienesch J. H. “Measurement and Analysis of Engine Pressure Data” SAE Paper No. 750026
- Brown W. L. “Methods for Evaluating Requirements and Errors in Cylinder Pressure Measurement” SAE Paper No. 670008
- Kach R. A. Adamczyk A. A. “Effects of Thermal Loading on Pressure Measurement in a Combustion Bomb” Review of Scientific Instruments 56 6 June 1985
- Rassweiler G. M. Withrow L. “Motion Pictures of Engine Flames Correlated with Pressure Cards” SAE Transactions 42 1938 paper No. 5
- Martini K. H. “New Range of High-Temperature Quartz Pressure Transducers” Transducer 77 Conference Kistler Publication 20.081c