High-Frequency Ignition Characteristics in a 4-Valve SI Engine with Tumble-Swirl Flows

Bae, Choongsik; Lee, J.S.; Ha, Jong-Yul

doi:10.4271/981433

Cited by 12 publications

(8 citation statements)

References 17 publications

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“…57 Bae evaluated a high-frequency multi-charge ignition strategy under various tumble and swirl strength conditions, with the restrike rates swept up to 30 kHz. 58 The effects of the charging voltage and the restrike frequency were investigated. A restrike rate of 20 kHz was found optimal for the ignition of lean mixtures in highly turbulent flows under the tested conditions.…”

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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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: 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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“…17 Based on the conventional TCI system, a wide range of advancements have been proposed in the literature. [18][19][20][21][22][23][24][25][26][27] A high-power discharge strategy is achieved by adding an external capacitor in parallel to the spark gap. The add-on capacitor can enhance the breakdown power, thus, is beneficial for the flame kernel initiation under quiescent condition.…”

Section: Introductionmentioning

confidence: 99%

“…12 Apart from the single discharge strategy, another glow phase discharge advancement is the coil-based multi-event spark strategy, which refers to energizing the ignition coils multiple times within one combustion cycle. Piock et al, 21,22 Bae et al, 23 and Hese et al 24 characterized a high-frequency single-coil repetitive discharge ignition system. Their results showed that the combustion process was improved by the series of high-power breakdown events generated through the repetitive discharge.…”

Section: Introductionmentioning

confidence: 99%

Investigation of multi-event spark discharge strategy for lean methane-air combustion

Zhu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The characterization of the single-coil repetitive discharge and the dual-coil offset discharge was conducted in a constant volume combustion chamber to better understand the operating principle of the multi-event spark ignition strategies. A parametric study of the dual-coil offset discharge was carried out through electric and optical diagnosis to identify the effective operational parameters, including coil working frequency, charging voltage, and coil inductances. Combustion tests under both quiescent and flow conditions with methane-air mixture were performed to demonstrate the ignition capability of the dual-coil offset strategy. Test results have shown that constantly depositing spark energy through offset discharge is beneficial to secure flame kernel. However, the offset discharge strategy requires a high working frequency, an elevated charging voltage, and fast reacting coils to maintain the spark plasma channel under high background pressure and intensified flow conditions.

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“…Nowadays the focus of study at home and abroad is the electric controlled high-energy ignition system. Bae et al (1998) developed a high-frequency ignition to improve the stability of initial flame in lean burn condition. Gunter (2003) invented a plasma acceleration ignition system to expand the boundary of lean burn.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study on Secondary Voltage of Dual-coil Ignition System

Haiguo¹,

Yang²,

Wang³

et al. 2013

RJASET

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With the intention of improving ignition performance of natural gas engine, a dual-coil ignition system was devised according to energy superposition principle. Using Multisim software and experimental apparatus, the variation of secondary voltage along with discharge time interval was studied by taking simulation and experimental methods. The results show that dual-coil ignition system can enhance the secondary voltage, increase spark duration and accomplish multiple discharge under different discharge time interval compared with single-coil ignition system. So the dual-coil ignition system is conducive to reliable ignition for natural gas engine under different working conditions and it provides a way to optimize the ignition system.

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High-Frequency Ignition Characteristics in a 4-Valve SI Engine with Tumble-Swirl Flows

Cited by 12 publications

References 17 publications

Future gasoline engine ignition: A review on advanced concepts

Future gasoline engine ignition: A review on advanced concepts

Investigation of multi-event spark discharge strategy for lean methane-air combustion

Simulation and Experimental Study on Secondary Voltage of Dual-coil Ignition System

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