Exhaust Gas Analysis of Various Potential GHG-Neutral Synthetic Fuels and
                        Gasoline/Alkylate-Blends Including Variable Injection Timings

Kraus, Christoph; Fitz, Patrick; Fellner, Felix; Härtl, Martin; Jaensch, Malte

doi:10.4271/2022-01-1085

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…Depending on whether there is a supply of auxiliary fuel or not, jet ignition is classified into two forms, i.e., active and passive schemes [11][12][13][14]. To investigate the ignition and flame dynamics, various experimental [15][16][17] and numerical studies [18,19] have been carried out.…”

Section: Introductionmentioning

confidence: 99%

Nozzle Design of Plug-and-Play Passive Pre-chamber Ignition Systems for Natural Gas Engines

Li¹,

Ma²,

Zhu³

et al. 2023

Preprint

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The pre-chamber technologies can improve the ignition performance of IC engines by more than two orders in magnitude and thereby substantial economic benefits. Compared with the common pre-chamber, a plug-and-play passive scheme is suitable for quick retrofit, which is getting more attention from the automobile industry. Good scavenging is the precondition for improving turbulent jet ignition performance for a passive pre-chamber. Therefore, detailed evaluations of the scavenging process and turbulent jet ignition deserve investigations for new pre-chamber schemes. In this paper, the effects of design parameters on ignition processes of plug-and-play passive pre-chamber were numerically studied, allowing for the lateral angle, orifice diameter, and vertical angle design. Seven pre-chamber schemes were evaluated, and four optimal ones were selected for bench tests. The characteristics of the scavenging process, turbulent jet ignition, and main-chamber combustion were investigated and analyzed. The results show that allowing for the trade-off between ignition energy and scavenging efficiency, the volume ratio of the pre-chamber to clearance is recommended to be 0.2~0.7%, and the corresponding area-volume ratio is 0.003~0.006 mm-1. Compared with the original natural gas engine, the pre-chamber retrofit can save up to 13.2% fuel consumption, which presents a significant improvement in fuel economy.

show abstract

Section: Introductionmentioning

confidence: 99%

Nozzle Design of Plug-and-Play Passive Pre-chamber Ignition Systems for Natural Gas Engines

Li¹,

Ma²,

Zhu³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines

Li,

Ma,

Zhu

et al. 2023

Applied Sciences

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To evaluate the significance of the geometrical parameters of a passive pre-chamber on engine performance, this study investigated the design of a plug-and-play passive pre-chamber in a 15 L heavy-duty natural gas engine. Multi-dimensional numerical investigations were conducted for parametric studies involving lateral angle, orifice diameter, and vertical angle. A compressive flow solver was employed for Navier–Stoke equations, coupled with detailed sub-models and a chemical kinetic scheme. The combustion model was calibrated and could well predict the engine combustion and operating performance. Seven pre-chamber schemes were evaluated, and four optimal ones were selected for experimental tests. The characteristics of the scavenging process, turbulent jet ignition, and main-chamber combustion were investigated and analyzed. The results show that, considering the trade-off between the ignition energy and the scavenging efficiency, the ratio of the pre-chamber to clearance volume is recommended to be 0.2~0.7%, and the corresponding area–volume ratio is 0.003~0.006 mm−1. Compared with the original natural gas engine, the pre-chamber retrofit can save up to 13.2% of fuel consumption, which presents a significant improvement in fuel economy.

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Efficiency Increase for Spark-Ignited Oxygenated Fuels through Adaptation of Cylinder Head and Piston

Kraus,

Fitz,

Härtl

et al. 2024

Proceedings

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Exhaust Gas Analysis of Various Potential GHG-Neutral Synthetic Fuels and Gasoline/Alkylate-Blends Including Variable Injection Timings

Cited by 8 publications

References 30 publications

Nozzle Design of Plug-and-Play Passive Pre-chamber Ignition Systems for Natural Gas Engines

Nozzle Design of Plug-and-Play Passive Pre-chamber Ignition Systems for Natural Gas Engines

Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines

Efficiency Increase for Spark-Ignited Oxygenated Fuels through Adaptation of Cylinder Head and Piston

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