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Fast Response Exhaust Gas Temperature Measurement in IC Engines
Technical Paper
2006-01-1319
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The harsh environment presented by engines, particularly in the exhaust systems, often necessitates the use of robust and therefore low bandwidth temperature sensors. Consequently, high frequencies are attenuated in the output. One technique for addressing this problem involves measuring the gas temperature using two sensors with different time-constants and mathematically reconstructing the true gas temperature from the resulting signals. Such a technique has been applied in gas turbine, rocket motor and combustion research.
A new reconstruction technique based on difference equations has been developed and its effectiveness proven theoretically. The algorithms have been successfully tested and proven on experimental data from a rig that produces cyclic temperature variations. These tests highlighted that the separation of the thermocouple junctions must be very small to ensure that both sensors are subjected to the same gas temperatures. Exhaust gas temperatures were recorded by an array of thermocouples during transient operation of a high performance two-stroke engine. The results show that the increase in bandwidth arising from the dual sensor technique allowed accurate measurement of exhaust gas temperature with relatively robust thermocouples. Finally, an array of very fine thermocouples (12.5 - 50 μm) was used to measure the in-cycle temperature variation in the exhaust.
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Authors
- Robert J. Kee - Virtual Engineering Centre, Queen's University Belfast
- Peter Hung - Virtual Engineering Centre, Queen's University Belfast
- Bryan Fleck - Virtual Engineering Centre, Queen's University Belfast
- George Irwin - Virtual Engineering Centre, Queen's University Belfast
- Robert Kenny - Virtual Engineering Centre, Queen's University Belfast
- John Gaynor - Virtual Engineering Centre, Queen's University Belfast
- Seán McLoone
Topic
Citation
Kee, R., Hung, P., Fleck, B., Irwin, G. et al., "Fast Response Exhaust Gas Temperature Measurement in IC Engines," SAE Technical Paper 2006-01-1319, 2006, https://doi.org/10.4271/2006-01-1319.Also In
SAE 2006 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Number: V115-7; Published: 2007-03-30
Number: V115-7; Published: 2007-03-30
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