Dynamic properties of contact thermometers for high temperatures

Abstract

Temperature sensors used in exhaust systems of combustion engines have to measure enormous temperature differences within the shortest periods of time. This serves to protect the engine parts with respect to their temperature stability and to govern the energy efficient operation of the engine. Numerical calculations with the Finite Elements Method are used to estimate static-thermal measurement errors and dynamic characteristics primarily concerning medium specificity and construction of the temperature sensors. New test equipment requires comparing various thermometers under real conditions (high temperature steps and velocity). Prediction models are used to correct the dynamic behavior and to predict the fluid temperature faster accurately.