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International Journal of Automotive Technology

, Volume 19, Issue 4, pp 643–650 | Cite as

Potential of Real-Time Cylinder Pressure Analysis by Using Field Programmable Gate Arrays

  • Jan Pfluger
  • Rene Savelsberg
  • Thomas Hülshorst
  • Stefan Pischinger
  • Jakob Andert
Article
  • 68 Downloads

Abstract

In this paper, a Field Programmable Gate Array (FPGA) was used to implement a real-time cylinder pressure analysis. The goal of the project was to improve the accuracy of calculated heat release and center of combustion calculations to enhance the precision of engine control functions. Compared to today’s real-time pressure analysis systems, several additional physical effects were taken into account for this objective. The wall heat transfer was calculated based on the approach published by Hohenberg. A chemical equilibrium with six substances was assumed for the mixture composition and a real-time calculation method was developed. Furthermore, a two-zone model was adapted and implemented for this realtime analysis. The validation of the results and the rating of the improvement in precision were based on GT-SUITE simulation results as an offline reference tool. Compared to state-of-the-art analysis systems, it was possible to reduce the average error of the center of combustion position from 1.6° to 0.5° crank angle (CA) by taking the investigated effects into account. Moreover, it was possible to significantly reduce the time required for the calculation from one complete combustion cycle to 0.2°CA at an engine speed of 3,000 rpm by using a continuous calculation method on the FPGA. This led to an additional improvement of the ability to control the engine, especially under highly dynamic operation conditions.

Key Words

Cylinder pressure indication and analysis Real-time simulation FPGA Combustion control 

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Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jan Pfluger
    • 1
  • Rene Savelsberg
    • 1
  • Thomas Hülshorst
    • 1
  • Stefan Pischinger
    • 2
  • Jakob Andert
    • 3
  1. 1.Electronics & ElectrificationFEV Europe GmbHAachenGermany
  2. 2.Institute for Combustion EnginesRWTH Aachen UniversityAachenGermany
  3. 3.Junior Professorship for Mechatronic Systems for Combustion EnginesRWTH Aachen UniversityAachenGermany

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