scholarly journals Effect of Thermocouple Size on the Measurement of Exhaust Gas Temperature in Internal Combustion Engines

2018 ◽  
Author(s):  
Nick Papaioannou ◽  
Felix Leach ◽  
Martin Davy
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Gas Temperature ◽  
Exhaust Gas Temperature

scholarly journals Exhaust Gas Temperature Measurements in Diagnostics of Turbocharged Marine Internal Combustion Engines Part I Standard Measurements

2015 ◽  
Vol 22 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Zbigniew Korczewski
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Technical Condition ◽  
Temperature Measurements ◽  
Injection System ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Gas Temperature ◽  
Measuring Signal ◽  
Exhaust Gas Temperature

Abstract The article discusses the problem of diagnostic informativeness of exhaust gas temperature measurements in turbocharged marine internal combustion engines. Theoretical principles of the process of exhaust gas flow in turbocharger inlet channels are analysed in its dynamic and energetic aspects. Diagnostic parameters are defined which enable to formulate general evaluation of technical condition of the engine based on standard online measurements of the exhaust gas temperature. A proposal is made to extend the parametric methods of diagnosing workspaces in turbocharged marine engines by analysing time-histories of enthalpy changes of the exhaust gas flowing to the turbocompressor turbine. Such a time-history can be worked out based on dynamic measurements of the exhaust gas temperature, performed using a specially designed sheathed thermocouple. The first part of the article discusses possibilities to perform diagnostic inference about technical condition of a marine engine with pulse turbocharging system based on standard measurements of exhaust gas temperature in characteristic control cross-sections of its thermal and flow system. Selected metrological issues of online exhaust gas temperature measurements in those engines are discusses in detail, with special attention being focused on the observed disturbances and thermodynamic interpretation of the recorded measuring signal. Diagnostic informativeness of the exhaust gas temperature measurements performed in steady-state conditions of engine operation is analysed in the context of possible evaluations of technical condition of the engine workspaces, the injection system, and the fuel delivery process.

Misfire detection on internal combustion engines using exhaust gas temperature with low sampling rate

2011 ◽  
Vol 31 (17-18) ◽  
pp. 4125-4131 ◽  
Author(s):  
Masayuki Tamura ◽  
Hitoshi Saito ◽  
Yukimaro Murata ◽  
Kunihiro Kokubu ◽  
Satoshi Morimoto
Keyword(s):  
Internal Combustion Engines ◽  
Sampling Rate ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Gas Temperature ◽  
Exhaust Gas Temperature ◽  
Misfire Detection

scholarly journals Improving the Uncertainty of Exhaust Gas Temperature Measurements in Internal Combustion Engines

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Nick Papaioannou ◽  
Felix Leach ◽  
Martin Davy
Keyword(s):  
Measurement Errors ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Operating Conditions ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Gas Temperature ◽  
Crank Angle ◽  
Reconstructed Temperature ◽  
Exhaust Gas Temperature

Abstract Accurate measurement of exhaust gas temperature (EGT) in internal combustion engines (ICEs) is a challenging task. The most common, and also the most practical, method of measurement is to insert a physical probe, for example, a thermocouple or platinum resistance thermometer, directly into the exhaust flow. Historically, consideration of the measurement errors induced by this arrangement has focused on the effects of radiation and the loss of temporal resolution naturally associated with a probe of finite thermal inertia operating within a pulsating flow with a time-varying heat input. However, a recent numerical and experimental study has shown that conduction errors may also have a significant effect on the measured EGT, with errors approaching ∼80 K depending on engine operating conditions. In this work, the authors introduce a new temperature compensation method that can correct for the combined radiation, conduction, and dynamic response errors introduced during the measurement and thereby reconstruct the “true” crank-angle resolved EGT to an estimated accuracy of ±1.5%. The significance of this result is demonstrated by consideration of a first law energy balance on an engine. It is shown that the exhaust gas enthalpy term is underestimated by 15–18% when calculated using conventional time-averaged data as opposed to using the mass-average exhaust enthalpy that is obtained by combining the reconstructed temperature data with crank angle-resolved exhaust flow rates predicted by a well-validated one-dimensional (1D) simulation.

scholarly journals Challenging Sensing Solutions Designed by Sensata Bulgaria

2017 ◽  
Vol 15 (4) ◽  
pp. 28-39
Author(s):  
A. Tanev ◽  
P. Mitsev ◽  
T. Lazarova
Keyword(s):  
High Pressure ◽  
Temperature Sensor ◽  
Internal Combustion Engines ◽  
Pressure Sensors ◽  
Internal Combustion ◽  
Exhaust Gas ◽  
Combustion Engines ◽  
Automotive Applications ◽  
Sensing Technology ◽  
Very High

Abstract This paper presents novel green automotive platinum sensing technology together with pressure sensors design principles and applications. In recent years, worldwide emissions legislation has been introduced and is rapidly becoming more stringent. With alternative vehicular propulsion methods far from becoming mainstream reality, leading automotive providers have intensified efforts in the direction of reducing the harmful footprint of their products. This is being accomplished via smaller, appropriately designed internal combustion engines, necessitating an increased and higher-performance sensor content per vehicle. This paper elaborates on temperature sensor application in automotive exhaust gas performance sensing and as well as pressure sensors in different challenging automotive applications with very high pressure levels.

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