A model-based temperature estimator for improving sensor dynamics in vehicle exhaust systems

Abstract

With the advent of fast processors, real-time process control is becoming an important component of modern automobile industrial products.Normally, heat transfer processes possess large time constants and, as a consequence, temperature sensors are relatively slow. In order to protect against the hostile environment, temperature sensors used in vehicle exhaust systems need additional casing. Due to the casing, the heat transfer from the surface of the casing to the sensor is decreased even further. In order to design a feedback control for the vehicle, accurate information about the temperature inside the exhaust system is required which needs to be estimated from the measured temperature inside the exhaust system. In this paper, we develop a model of the sensor and use a Kalman filter for the prediction of the ambient temperature from the measurements. Further, we validate our results with suitable tests and compare the test results with the simulation results.

Dynamisches Verhalten von Berührungsthermometern unter Berücksichtigung der Temperaturabhängigkeit der Materialdaten – Erweiterung der VDI/VDE-Richtlinie 3522

“…B. die 63 -Zeit eines Messwiderstands beim Abwärtssprung von 1000 ∘ C auf Raumtemperatur gegenüber dem Aufwärtssprung fast halbiert [4]. Das muss insbesondere dann beachtet werden, wenn Prädiktionsverfahren zur schnelleren Bestimmung des Endwerts in das Verfahren der Temperaturmessung integriert werden [7]. Deshalb wurden in der 2014 neu verabschiedeten Richtlinie neue Verfahren aufgenommen, die in einem der nachfolgenden Absätze beschrieben werden.…”

Projeto e Experimentação de um Filtro Acelerador para um Sensor Dinâmico de Temperatura Sujeito a Parâmetros Incertos

“…Dentre os trabalhos que procuraram melhorar o desempenho dinâmico de sensores tem-se: a comparação de um método baseado em modelo discreto com outro, usando redes neurais, para a correção de erros em sensores de gases foi feita por Roj (2016); Güther et al (2013) aplicaram os dados lidos de um sensor de temperatura veicular a um filtro de Kalman, o qual realizou uma predição de estado. No entanto, o filtro foi implementado em Matlab R o que, para muitas aplicações, nãoé prático.…”

The Influence of the Frequency of Ultrasound on the Exhaust Gas Purification Process in a Diesel Car Muffler

“…• Improving manufacturing [14] and the technology of producing exhaust system components [14,15]. This is primarily due to the need to ensure exhaust and noise emissions at a level limited by regulations and standards [16,17]. United Nations Regulation 83 and UN Regulation 154 set emission limits for particle number methodology in light-duty vehicles, while UN Regulation 49 does so for heavy-duty engines.…”