Results 221 to 230 of about 209,383 (273)

Effects of Geometry on Passive Pre-Chamber Combustion Characteristics

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">Towards a fundamental understanding of the ignition characteristics of pre-chamber (PC) combustion engines, computational fluid dynamics (CFD) simulations were conducted using CONVERGE. To assist the initial design of the KAUST pre-chamber engine experiments, the primary focus of
Mickael Silva, Sangeeth Sanal, Ponnya Hlaing, Emre Cenker, Bengt Johansson, Hong G. Im   +5 more
openaire   +1 more source

Direct Injection Strategy to Extend the Lean Limit of a Passive Pre-Chamber

ASME 2022 ICE Forward Conference, 2022
Abstract Lean operation increases the efficiency of the Otto-cycle internal combustion engine and decreases its emissions. However, increasing the air-fuel ratio beyond stoichiometry requires higher ignition energy to maintain the stable operation of the engine.
Fahad Almatrafi, Kalim Uddeen, Moez Ben Houidi, Emre Cenker, James Turner   +4 more
openaire   +1 more source

Experimental and Numerical Investigation of a Passive Pre-Chamber Jet Ignition Single-Cylinder Engine

SAE Technical Paper Series, 2021
<div class="section abstract"><div class="htmlview paragraph">In the framework of an increasing demand for a more sustainable mobility, where the fuel consumption reduction is a key driver for the development of innovative internal combustion engines, Turbulent Jet Ignition (TJI) represents one of the most promising solutions to improve the
Millo F., Rolando L., Piano A., Sementa P., Catapano F., Di Iorio S., Bianco A.   +6 more
openaire   +2 more sources

Visualization and Statistical Analysis of Passive Pre-chamber Knock in a Constant-volume Optical Engine

SAE International Journal of Engines, 2023
<div>This study investigates the behavior of pre-chamber knock in comparison to traditional spark ignition engine knock, using a modified constant-volume gasoline engine with an optically accessible piston. The aim is to provide a deeper understanding of pre-chamber knock combustion and ...
Dong Eun Lee, Xin Yu, Andrew Baur, Li Qiao   +3 more
openaire   +1 more source

Numerical Investigation of the Effects of Piston Design and Injection Strategy on Passive Pre-chamber Enrichment

SAE Technical Paper Series, 2022
<div class="section abstract"><div class="htmlview paragraph">The pre-chamber combustion can extend the lean limit of internal combustion engines (ICE) and hence increase their overall efficiency. Compared to active pre-chambers equipped with an auxiliary fuel supply system, passive pre-chambers have lower manufacturing costs and require ...
Fahad Almatrafi, Mickael Silva, Moez Ben Houidi, Emre Cenker, Jihad Badra, Balaji Mohan, Hong G. Im, James Turner   +7 more
openaire   +1 more source

Investigation on the Effects of Passive Pre-Chamber Ignition System and Geometry on Engine Knock Intensity

ASME 2022 ICE Forward Conference, 2022
Abstract The effects of passive pre-chamber (PC) geometry and nozzle pattern as well as the use of either conventional spark or non-equilibrium plasma PC ignition system on knocking events were studied in an optically-accessible single-cylinder gasoline research engine.
Francesco Di Sabatino, Pablo Jose Martinez-Hernandiz, Ricardo Novella Rosa, Isaac Ekoto   +3 more
openaire   +1 more source

Experimental Study of Fuel Mixture Limitations of Ammonia and Gasoline in a Passive Pre-Chamber Engine

SAE International Journal of Advances and Current Practices in Mobility, 2023
<div class="section abstract"><div class="htmlview paragraph">Ammonia as a fuel suffers from a high ignition energy requirement making it hard to ignite in stoichiometric mixtures, especially with normal spark plugs. On the other hand, pre-chambers are proven to provide high ignition energy by producing multiple ignition spots in the main ...
Fahad Almatrafi, Kalim Uddeen, Kesty Kenkoh, Hammam Aljabri, Jamie Parnell, Mark Peckham, James W.G. Turner   +6 more
openaire   +1 more source

Visualization of Combustion and Flow Phenomena in a Methane-Fueled Passive Pre-Chamber Ignited Gas Engine

SAE Technical Paper Series, 2023
<div class="section abstract"><div class="htmlview paragraph">This study aims to investigate the combustion and flow phenomena in a stoichiometrically operated methane-fueled passive pre-chamber ignited gas engine. The combustion phenomena are visualized with a high-speed camera and the chemical properties are resolved by Large Eddy ...
MD Tanvir KHAN, Nobuyuki KAWAHARA, Yoshimitsu KOBASHI, Towa HIRAYAMA, Ayumi SHIMIZU, Sekai MIYAMOTO   +5 more
openaire   +1 more source

Misfire and knock detection based on the ion current inside a passive pre-chamber of gasoline engine

Fuel, 2022
Abstract In this study, a novel idea of capturing ion current signals inside the passive pre-chamber is proposed. The signals were analyzed in terms of various operating conditions based on a naturally aspired gasoline engine. Under normal combustion, the chemical and the thermal ionization peak's phase difference is much smaller than the commercial ...
Jinqiu Wang, Jiaye Shi, Jun Deng, Xinke Miao, Yihui Liu, Song Pan, Liguang Li   +6 more
openaire   +1 more source

Gas Exchange Optimization for a Passive Pre-Chamber Ignition System

SAE International Journal of Advances and Current Practices in Mobility
<div class="section abstract"><div class="htmlview paragraph">Increasing ignition energy by replacing standard spark igniters with pre-chambers is an established combustion accelerator. With rapid combustion on the one hand, mixture dilution can be extended while maintaining the combustion stability at adequate levels.
Felix Fellner, Patrick Fitz, Martin Härtl, Malte Jaensch   +3 more
openaire   +1 more source