Development of a Virtual Sensor to Predict Cylinder Pressure Signal Based on a Knock Sensor Signal

Stefan Posch*, Gerhard Pirker, Achilles Kefalas, Andreas Wimmer

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftKonferenzartikelBegutachtung

Abstract

Virtual sensing refers to the processing of desired physical data based on measured values. Virtual sensors can be applied not only to obtain physical quantities which cannot be measured or can only be measured at an unreasonable expense but also to reduce the number of physical sensors and thus lower costs. In the field of spark ignited internal combustion engines, the virtual sensing approach may be used to predict the cylinder pressure signal (or characteristic pressure values) based on the acceleration signal of a knock sensor. This paper presents a method for obtaining the cylinder pressure signal in the high-pressure phase of an internal combustion engine based on the measured acceleration signal of a knock sensor. The approach employs a partial differential equation to represent the physical transfer function between the measured signal and the desired pressure. A procedure to fit the modeling constants is described using the example of a large gas engine. The results indicate the great potential of this approach to be applied to cylinder balancing or further engine control tasks.
Originalspracheenglisch
Aufsatznummer2022-01-0627
Seitenumfang11
FachzeitschriftSAE Technical Papers
Ausgabenummer2022
DOIs
PublikationsstatusVeröffentlicht - 29 März 2022
Veranstaltung2022 WCX SAE World Congress Experience: WCX 2022 - Detroit, USA / Vereinigte Staaten
Dauer: 5 Apr. 20227 Apr. 2022

ASJC Scopus subject areas

  • Sicherheit, Risiko, Zuverlässigkeit und Qualität
  • Umweltverschmutzung
  • Wirtschaftsingenieurwesen und Fertigungstechnik
  • Fahrzeugbau

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