Michael Engelmayer

Walter de Gruyter (Germany)

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Andreas Wimmer

Graz University of Technology

Andreas Wimmer

Graz University of Technology

Bernhard Rossegger

Graz University of Technology

Anton Tilz

Walter de Gruyter (Germany)

Gerhard Pirker

Graz University of Technology

Franz Chmela

Graz University of Technology

Wolfgang Fimml

Walter de Gruyter (Germany)

Gernot Hirschl

Anstalt für Verbrennungskraftmaschinen List

Walter Harrer

Montanuniversität Leoben

Martin Vareka

Graz University of Technology

Cooperative Institutions

Graz University of Technology

Walter de Gruyter (Germany)

KUKA (Germany)

Saarland University

Combustion Institute

Anstalt für Verbrennungskraftmaschinen List

Montanuniversität Leoben

Research Association for Combustion Engines

Supply Chain Competence Center (Germany)

Anstalt für Verbrennungskraftmaschinen List

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Virtual Development of Combustion Concepts for Large Gas Engines

Franz Chmela Michael Engelmayer Hubert Winter Andreas Wimmer

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The Development and Application of Advanced Sensor Solutions for Gaining New Insights Into Large Engines

Ansel Higgs Bernhard Rossegger Anton Tilz Martin Vareka Michael Engelmayer

Abstract Large engines play an important role in today’s increasingly climate focused energy and transportation sectors. New research and measurement technologies are being developed to move forward to alternative, carbon-free fuels and further increases in service life. A selection of new technologies with potential for advancing combustion engine development will be presented in this publication. Included are a variety of telemetry systems, capable of delivering online measurement data from within the engine, including piston temperatures and (inter-ring-) pressures, connecting rod upper and lower bearing temperatures, cylinder head and liner temperatures, and spark plug electrode temperatures. Descriptions of solutions for the various sensing positions, as well as boundary conditions, mechanical considerations, and design phase iterations, will be outlined. Finally, results of measurements on large single-cylinder engines will be used to show how these systems can provide new insights into engine processes and thus contribute to the optimization of these engines. During the course of these measurements, experiments involving alternative fuels and combustions processes were performed. The novel component stress caused by these tests was also characterized with these telemetry systems and will briefly be discussed.

Piston (optics)

Spark plug

SPARK (programming language)

10.1115/icef2023-110623

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Potential of CFD Simulation for Developing Low Soot Combustion Concepts for Large Bore Diesel Engines

Jan Vyštejn Gert Taucher Michael Engelmayer Andreas Wimmer

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A novel method for lubrication oil consumption measurement for wholistic tribological assessments of internal combustion engines

Tribology International (2021)

Bernhard Rossegger Markus Eder Martin Vareka Michael Engelmayer Andreas Wimmer

Lubricity

10.1016/j.triboint.2021.107141

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Citations (11)

Intelligent Bearings to Support Engine Development

MTZ worldwide (2019)

Rainer Aufischer Stefan Schallmeiner Andreas Wimmer Michael Engelmayer

10.1007/s38313-019-0137-6

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Virtuelle Brennverfahrensentwicklung bei Großmotoren

Franz Chmela Andreas Wimmer Michael Engelmayer Hubert Winter

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Intelligente Gleitlager zur Unterstützung der Motorenentwicklung

MTZ - Motortechnische Zeitschrift (2019)

Rainer Aufischer Stefan Schallmeiner Andreas Wimmer Michael Engelmayer

10.1007/s35146-019-0142-y

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The injection nozzle geometry - optical injection spray investigations on a fired single cylinder engine

Michael Engelmayer

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Deuterium Tracer for Accurate Online Lube-Oil-Consumption Measurement: Stability, Compatibility and Tribological Characteristics

Lubricants (2022)

Martin Vareka Bernhard Rossegger Franz Novotny-Farkas Michael Engelmayer Andreas Wimmer

Because of the impact of lubrication on the efficiency and the lifecycle cost and emissions, the lubricating-oil consumption (LOC) is one of the key indicators in the research and development of internal combustion engines. State-of-the-art methods for LOC measurement are based on the use of a certain tracer to track the oil consumption. However, all of the currently available tracers have their downsides (e.g., the use of a radioactive tracer, corrosive emissions, etc.). Therefore, in the course of this research project, a new tracer substance that is based on a stable nonradioactive isotope of hydrogen—deuterium—was developed and tested thoroughly. The LOC is monitored by a hydrogen/deuterium isotopic ration in the exhaust gas by using an isotopic water analyzer. Tribologically important properties, such as the viscosity, stability, and compatibility of the tracer were investigated by laboratory experiments by using several tools, such as infrared spectroscopy, gas chromatography, thermogravimetry, etc. The properties relevant to the applicability of the method, such as the accuracy and the reproducibility, were investigated by engine test-bench experiments. Finally, long-term stability tests of the tracer were conducted with a field test.

TRACER

10.3390/lubricants10050084

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Alternative Spark Plug Electrode Materials for Economical, Reliable Engine Operation

Anton Tilz Manuel Gruber Walter Harrer Michael Engelmayer Wolfgang Fimml

Abstract Large gas engines used for power generation or transport rely on spark plugs to ignite the fuel-air mixture in the combustion chamber. One focus of recent development work has been on reducing emissions while enhancing the performance of the engine, and spark plugs have been identified as playing a crucial role in this evolution process. Spark plug development has contributed to reducing emissions and lowering fuel consumption. One key factor is the electrode material. For conventional high-performance spark plugs, which consist of precious metal electrodes (e.g., based on platinum or iridium), the potential for improvement is becoming limited. Due to their outstanding high-temperature stability, ceramic electrodes appear to be a promising alternative. The need for electrically conductive materials significantly limits the number of useable ceramics; further obstacles are their inherent brittleness and the challenge of attaching them to metals, which is indispensable for the intended application. This publication presents experiments in laboratory conditions with spark plugs equipped with ceramic electrodes. Ignition behavior tests and analysis of the secondary voltage trace of these spark plugs have yielded positive results, indicating the potential for future developments.

Spark plug

SPARK (programming language)

10.1115/icef2023-109959

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