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Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation = = Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation =/
Reminder of title:	Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren.
Author:	Hoth, Alexander.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2024,
Description:	283 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
Contained By:	Dissertations Abstracts International85-11B.
Subject:	Automotive engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30997337
ISBN:	9798382599878

Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation = = Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren.
Hoth, Alexander.

Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation =Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren. - Ann Arbor : ProQuest Dissertations & Theses, 2024 - 283 p.

Source: Dissertations Abstracts International, Volume: 85-11, Section: B.

Thesis (Ph.D.)--Michigan Technological University, 2024.

Octane numbers (ONs) are used worldwide to rate the knock propensity of gasolinelike fuels for spark-ignition engines, making ONs the leading indicator of fuel quality for commercial distribution. The ONs were established 90 years ago and have only received minor changes compared to significant advancements in modern engine operation and fuel composition. This has resulted in discrepancies between knocklimited modern engine operation and standard ON ratings. This dissertation used a standard CFR octane rating engine at Argonne National Laboratory that was instrumented with modern combustion research tools to investigate key differences between the Research Octane Number (RON) rating conditions and modern knocklimited engine operation. The D1 Detonation Pickup as part of the standardized knockmeter system was able to quantify high-frequency pressure oscillations associated with knocking combustion. On the contrary, the subsequent signal conditioner attenuated all high-frequency signal content rendering the standard knockmeter system for octane ratings blind to knocking cylinder pressure oscillations. Instead, the knockmeter system was found to rate the knock area above the cylinder pressure of knockpoint, which is associated with knocking combustion but does not quantify high-frequency pressure amplitudes. The high-frequency pressure amplitudes can be used to differentiate between highly aromatic and highly paraffinic fuels, and furthermore indicate the fuel RON-MON sensitivity. A shift to stoichiometric operation and oscillations amplitude-based knock threshold better represents modern knock-limited engine operation but only resulted in mediocre correlations to RON. A modified RON rating was developed to compensate for the increased heat of vaporization (HoV) and subsequent shift in volumetric efficiency of alcoholic blends, which showed a much-reduced effective RON rating without their HoV advantage. A toluene standardization fuel-based bracketing procedure was developed for octane ratings exceeding 100 to replace toxic tetraethyl lead and rate fuels within the reproducibility limits of the standard RON method. A novel Supercharged Octane Number (SON) was developed to better replicate cylinder pressure-temperature conditions of modern boosted SI engines, which improved the correlation over standard RON. Further improvements were found when incorporating the novel SON and RON as interpolation boundaries for an updated Supercharged Octane Index, which enhanced the correlation over the conventional Octane Index.

ISBN: 9798382599878Subjects--Topical Terms:

2181195
Automotive engineering.
Subjects--Index Terms:

Argonne

Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation = = Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren.
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245 1 0 $a Investigation of Operational Parameter Differences Between the Standard RON Test Method and Knock-Limited Modern Spark-Ignition Engine Operation = $b Untersuchung von betriebsparameterunterschieden zwischen der standard RON testmethode und dem klopfbegrenzten betrieb moderner ottomotoren.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 283 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
500 $a Advisor: Miers, Scott A.;Kolodziej, Christopher P.
502 $a Thesis (Ph.D.)--Michigan Technological University, 2024.
520 $a Octane numbers (ONs) are used worldwide to rate the knock propensity of gasolinelike fuels for spark-ignition engines, making ONs the leading indicator of fuel quality for commercial distribution. The ONs were established 90 years ago and have only received minor changes compared to significant advancements in modern engine operation and fuel composition. This has resulted in discrepancies between knocklimited modern engine operation and standard ON ratings. This dissertation used a standard CFR octane rating engine at Argonne National Laboratory that was instrumented with modern combustion research tools to investigate key differences between the Research Octane Number (RON) rating conditions and modern knocklimited engine operation. The D1 Detonation Pickup as part of the standardized knockmeter system was able to quantify high-frequency pressure oscillations associated with knocking combustion. On the contrary, the subsequent signal conditioner attenuated all high-frequency signal content rendering the standard knockmeter system for octane ratings blind to knocking cylinder pressure oscillations. Instead, the knockmeter system was found to rate the knock area above the cylinder pressure of knockpoint, which is associated with knocking combustion but does not quantify high-frequency pressure amplitudes. The high-frequency pressure amplitudes can be used to differentiate between highly aromatic and highly paraffinic fuels, and furthermore indicate the fuel RON-MON sensitivity. A shift to stoichiometric operation and oscillations amplitude-based knock threshold better represents modern knock-limited engine operation but only resulted in mediocre correlations to RON. A modified RON rating was developed to compensate for the increased heat of vaporization (HoV) and subsequent shift in volumetric efficiency of alcoholic blends, which showed a much-reduced effective RON rating without their HoV advantage. A toluene standardization fuel-based bracketing procedure was developed for octane ratings exceeding 100 to replace toxic tetraethyl lead and rate fuels within the reproducibility limits of the standard RON method. A novel Supercharged Octane Number (SON) was developed to better replicate cylinder pressure-temperature conditions of modern boosted SI engines, which improved the correlation over standard RON. Further improvements were found when incorporating the novel SON and RON as interpolation boundaries for an updated Supercharged Octane Index, which enhanced the correlation over the conventional Octane Index.
520 $a Die Oktanzahlen (OZ) werden weltweit zur Bewertung der Klopfneigung von Benzin fur Ottomotoren verwendet und dienen als fuhrender Indikator fur die Kraftstoffqualitat fur den gewerblichen Vertrieb. Die OZs wurden vor 90 Jahren eingefuhrt und haben im Vergleich zu signifikanten Fortschritten bei modernem Motorenbetrieb und Kraftstoffzusammensetzung nur geringfugige Anderungen erfahren. Dies fuhrte zu Diskrepanzen zwischen Motorenbetrieb an der Klopfgrenze und OZs. In dieser Dissertation wurde ein Standard CFR-Oktanzahlprufmotor am Argonne National Laboratory verwendet, welcher mit modernen Instrumenten zur Verbrennungsforschung ausgerustet wurde. Parameterstudien wurden durchgefuhrt, um wichtige Unterschiede zwischen den Betriebsbedingungen der Research Oktanzahl (ROZ) und modernem klopfbegrenzten Motorenbetrieb zu untersuchen. Der D1-Detonationsaufnehmer als Teil des genormten Klopfmesssystems konnte Hochfrequenzdruckschwingungen, die mit klopfender Verbrennung verbunden sind, quantifizieren. Im Gegensatz dazu dampfte der nachfolgende Signalkonditionierer alle Hochfrequenzsignalinhalte und machte das standard Klopfmesssystem fur Oktanzahlen blind fur Druckschwingungen im Zylinder. Stattdessen wurde festgestellt, dass das Klopfmesssystem den Klopfbereich uber dem Zylinderdruck des Klopfpunktes bewertet, der der klopfenden Verbrennung zugeordnet werden kann, jedoch keine Quantifizierung der Hochfrequenzamplitude enthalt. Die Hochfrequenzdruckamplituden konnen zwischen stark aromatischen und stark paraffinischen Kraftstoffen unterscheiden und weisen zudem auf die ROZ-MOZ Empfindlichkeit des Kraftstoffs hin. Eine Umstellung auf stochiometrischen Betrieb und eine amplitudenbasierte Klopfschwelle reprasentiert den modernen klopfbegrenzten Motorenbetrieb besser, fuhrte jedoch nur zu mittelmasigen Korrelationen mit der ROZ. Eine neuartige Supercharged Oktanzahl (SOZ) wurde entwickelt, um die Zylinderdruck- und -Temperaturbedingungen von klopf-begrenzten aufgeladenen Ottomotoren besser nachzubilden, was die Korrelation gegenuber der Standard ROZ verbesserte. Weitere Verbesserungen wurden erzielt, wenn die neue SOZ und ROZ als Interpolationsgrenzen fur einen aktualisierten Supercharged Oktanindex einbezogen wurden, was die Korrelation gegenuber dem herkommlichen Oktanindex verbesserte. Eine modifizierte ROZ-Bewertung wurde entwickelt, um die erhohte Verdampfungsenthalpie (HoV) von alkoholischen Kraftstoffen und die anschliesende Anderung des volumetrischen Wirkungsgrads auszugleichen, was zu einer erheblich reduzierten effektiven ROZ ohne deren Verdampfungsenthalpievorteil fuhrte. Ein Verfahren zur Verwendung von standardisierten Toluolkrafstoffen wurde fur Oktanzahlen uber 100 entwickelt, um das giftige Tetraethylblei zu ersetzen und Kraftstoffe innerhalb der Reproduzierbarkeitsgrenzen der Standard ROZ Methode zu bewerten.
590 $a School code: 0129.
650 4 $a Automotive engineering. $3 2181195
650 4 $a Petroleum engineering. $3 566616
650 4 $a Thermodynamics. $3 517304
650 4 $a Mechanical engineering. $3 649730
653 $a Argonne
653 $a CFR engine
653 $a Knocking combustion
653 $a Research Octane Number
653 $a Supercharged Octane Number
690 $a 0540
690 $a 0765
690 $a 0348
690 $a 0548
710 2 $a Michigan Technological University. $b Mechanical Engineering-Engineering Mechanics. $3 1043627
773 0 $t Dissertations Abstracts International $g 85-11B.
790 $a 0129
791 $a Ph.D.
792 $a 2024
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30997337