Railplug Ignition Operating Characteristics and Performance:A Review

Hall, Matthew J.; Matthews, Ronald D.; Ezekoye, Ofodike A.

doi:10.4271/2007-01-1832

Cited by 17 publications

(4 citation statements)

References 17 publications

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“…In plasma jet and rail-plug ignition systems, a relatively larger capacitor is tightly coupled to the spark plug to enhance the ignition energy. 34,35 The capacitor is charged by an auxiliary power supply above the normal resistive discharge voltage, that is, a few hundreds of volts. The spark discharge is initiated by the high-voltage breakdown caused by the inductive ignition coil.…”

Section: Ignition Energy and Durationmentioning

confidence: 99%

“…52 In direct-capacitor discharge ignition systems, the capacitive discharge is coupled to the high-voltage secondary winding of the ignition coil, aiming to enhance the breakdown power or to increase the ignition energy significantly. 23,34,35 Yu et al measured the discharge voltage and current waveforms in the secondary winding for the direct-capacitor discharge during the pre-breakdown and the following capacitive discharge processes. 53 Figure 1 shows the waveforms of three types of discharge at one bar pressure and room temperature.…”

Section: High-energy Spark Ignitionmentioning

confidence: 99%

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Future gasoline engine ignition: A review on advanced concepts

Zheng

2020

International Journal of Engine Research

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To meet the future requirements of fuel economy and exhaust emissions, high-efficiency gasoline engines tend to employ diluted combustion concepts along with intensified charge motion and stratified mixtures. Securing the ignition of such mixtures over the full engine operation range is challenging, because of the lowered mixture reactivity and increased discrepancy of stoichiometry. In recent years, increasing research efforts have been spending on innovations of ignition technologies to tackle the challenges. In this paper, the directions of ignition improvement are highlighted based on the fundamental understanding of the ignition mechanisms. The working principles of the primary types of advanced ignition systems are introduced; and relevant engine and combustion vessel test results are reviewed. The ignition systems are categorized as: (1) high-energy spark ignition, (2) pulsed nanosecond discharge ignition, (3) radio-frequency plasma ignition, (4) laser-induced plasma ignition, and (5) pre-chamber ignition. The advanced ignition systems are commented, regarding the ignition effectiveness and the implementation challenges, according to the literatures and the extensive empirical work at the authors’ laboratory.

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Section: Ignition Energy and Durationmentioning

confidence: 99%

Section: High-energy Spark Ignitionmentioning

confidence: 99%

Future gasoline engine ignition: A review on advanced concepts

Zheng

2020

International Journal of Engine Research

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“…As new ignition techniques apart from spark plugs, there are also reports in the literature about a railplug igniter [1] and a plasma jet igniter [2] that inject a high level of energy to disperse thermal plasma over a wide area. Another report [3] describes a method of accomplishing volumetric ignition by discharging combustion gas containing radicals as a result of burning a rich mixture in the plasma cavity of a plasma jet igniter.…”

Section: Introductionmentioning

confidence: 99%

A trial of ignition innovation of gasoline engine by nanosecond pulsed low temperature plasma ignition

Shiraishi¹,

Urushihara²,

Gundersen³

2009

J. Phys. D: Appl. Phys.

109

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Application of nanosecond pulsed low temperature plasma as an ignition technique for automotive gasoline engines, which require a discharge under conditions of high back pressure, has been studied experimentally using a single-cylinder engine. The nanosecond pulsed plasma refers to the transient (non-equilibrated) phase of a plasma before the formation of an arc discharge; it was obtained by applying a high voltage with a nanosecond pulse (FWHM of approximately 80 or 25 ns) between coaxial cylindrical electrodes. It was confirmed that nanosecond pulsed plasma can form a volumetric multi-channel streamer discharge at an energy consumption of 60 mJ cycle−1 under a high back pressure of 1400 kPa. It was found that the initial combustion period was shortened compared with the conventional spark ignition. The initial flame visualization suggested that the nanosecond pulsed plasma ignition results in the formation of a spatially dispersed initial flame kernel at a position of high electric field strength around the central electrode. It was observed that the electric field strength in the air gap between the coaxial cylindrical electrodes was increased further by applying a shorter pulse. It was also clarified that the shorter pulse improved ignitability even further.

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“…Generally speaking, the minimum ignition energy tends to increase and the burning velocity tends to decrease rapidly, on the fuel leaner side or when it is diluted with inert gases [2], which can cause many problems, such as decreased engine power, deteriorated fuel economy, increased pollutant emissions, and generated noise. To solve these problems, new enhanced ignition systems have been proposed, for example, plasma jet igniters [3], laser ignition [4], rail plug [5], etc. Additional work, however, needs to be done on their commercial use.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of ignition characteristics of lean premixed hydrocarbon–air mixtures by repetitive pulse discharges

Tanoue

Hotta

Moriyoshi

2009

International Journal of Engine Research

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A newly developed small-sized inductive energy storage (IES) circuit that uses a semiconductor switch for the turn-off action is successfully applied to an ignition system in spark ignition engines operating under lean fuel–air ratios. This IES circuit can generate repetitive nanosecond pulse discharges. Experiments are conducted by means of a spherically expanding flame configuration for C3H8–air mixtures under various conditions. Findings show the investigated ignition system improves the inflammability of lean combustible mixtures in terms of extended flammability limits, shorted ignition delay time, and extended dilution limits, compared with conventional spark ignition systems.

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Railplug Ignition Operating Characteristics and Performance:A Review

Cited by 17 publications

References 17 publications

Future gasoline engine ignition: A review on advanced concepts

Future gasoline engine ignition: A review on advanced concepts

A trial of ignition innovation of gasoline engine by nanosecond pulsed low temperature plasma ignition

Enhancement of ignition characteristics of lean premixed hydrocarbon–air mixtures by repetitive pulse discharges

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