Gaussian trajectories in motion control for camless engines

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

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In the last few years, variable engine valve control has attracted a lot of attention because of its ability to reduce pumping losses and increase torque performance over a wider speed and load range. Variable valve timing also allows control of internal exhaust gas recirculation, thus improving fuel economy and reducing NOx emissions. One of the most important issues in this context is to track suitable variable (optimized in terms of engine speed and load) motion profiles for the intake and exhaust valves. This can be achieved using dedicated actuators for the valves instead of a traditional camshaft. This contribution considers a new kind of actuator for this purpose and its control for motion tracking in the context of camless systems. However, this paper's main intention is to introduce a method of generating variable engine valve trajectories that are based on Gaussian curves and exemplarily provide the reader with information on how to exploit their favorable mathematical properties for control design purposes. As a demonstration of this kind of curve's variability, a delay-compensating phase-adaptive feedforward action is derived from a linear model description of the actuator. Simulations show the effectiveness of a simple heuristic delay-estimation algorithm in combination with the mentioned feedforward action.

Original languageEnglish
Title of host publicationProceedings of the 2017 21st International Conference on Process Control (PC)
EditorsM. Fikar, M. Kvasnica
Number of pages5
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Publication date11.07.2017
Edition1
Pages76-80
ISBN (print)978-1-5386-4012-8
ISBN (electronic)978-1-5386-4011-1
DOIs
Publication statusPublished - 11.07.2017
Event21st International Conference on Process Control - PC 2017 - Strbske Pleso, Slovakia
Duration: 06.06.201709.06.2017
Conference number: 21
https://www.uiam.sk/pc17/index.html%3Fq=node%252F1.html

    Research areas

  • Engine applications, servo hydraulic systems, trajectory generation
  • Engineering

DOI

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