Results 1 to 10 of about 1,135 (238)

Effect of Temperature Conditions on Flame Evolutions of Turbulent Jet Ignition [PDF]

Energies, 2021
Turbulent jet ignition technology can significantly improve lean combustion stability and suppress engine knocking. However, the narrow jet channel between the pre-chamber and the main chamber leads to some difficulties in heat exchange, which ...
Jiaying Pan, Yu He, Tao Li, Haiqiao Wei, Lei Wang, Gequn Shu   +5 more
doaj   +6 more sources

Skeletal CH3OH/NOx Kinetic Model for Simulating Spark-Ignition and Turbulent Jet Ignition Engines [PDF]

ACS Omega
Methanol is a promising renewable fuel for achieving a better engine combustion efficiency and lower exhaust emissions. Under exhaust gas recirculation conditions, trace amounts of nitrogen oxides have been shown to participate in fuel oxidation and impact the ignition characteristics significantly.
Wenxian Tang, Mickael Silva, Khaiyom Hakimov, Xiaoyuan Zhang, Ponnya Hlaing, Emre Cenker, Abdullah S. AlRamadan, James W. G. Turner, Aamir Farooq, Hong G. Im, S. Mani Sarathy   +10 more
doaj   +5 more sources

Lean Methane Mixtures in Turbulent Jet Ignition Combustion System

Energies, 2023
The development of modern vehicle drives is aimed at reducing fuel consumption (i.e., crude oil) and minimizing the exhaust emission of toxic components. One such development is the implementation of a two-stage combustion system. Such a system initiates
Ireneusz Pielecha, Filip Szwajca
doaj   +2 more sources

Experimental observation of the TJI-initiated HPDI gas combustion: Vertically crossed flame jet and methane jet

Applications in Energy and Combustion Science, 2023
In the field of natural gas marine engines, the high-pressure direct injection (HPDI) technology is widely used to achieve emission reduction while maintaining equivalent thermal efficiency and power output compared to diesel engines.
Lijia Zhong, Wanhui Zhao, Haiqiao Wei, Lei Zhou   +3 more
doaj   +1 more source

Numerical Investigation on the Jet Characteristics and Combustion Process of an Active Prechamber Combustion System Fueled with Natural Gas

Energies, 2022
An active prechamber turbulent ignition system is a forced ignition method for internal combustion engines fueled with low reactivity fuels, i.e., natural gas and gasoline, which could expand the lean-burn limit, promote flame propagation, and ensure ...
Lina Xu, Gang Li, Mingfa Yao, Zunqing Zheng, Hu Wang   +4 more
doaj   +1 more source

CFD-based methodology for the characterization of the combustion process of a passive pre-chamber gasoline engine

Transportation Engineering, 2023
Pre-chamber (PC) ignition systems, enabling Turbulent Jet Ignition (TJI) combustion, represent a promising technology to extend the lean limit of Spark Ignition Internal Combustion Engines.
A. Piano, A. Scalambro, F. Millo, F. Catapano, P. Sementa, S. Di Iorio, A. Bianco   +6 more
doaj   +1 more source

Three-Dimensional Direct Numerical Simulation of Near-Field Ozone-Enhanced Lean Premixed Syngas Turbulent Jet Flame

Energies, 2022
Due to its enhancement in the flame speed, ozone added in lean premixed syngas turbulent jet flame was investigated by the three-dimensional direct numerical simulation method in the near field of the flame.
Cong Xu, Junguang Lin, Zhihua Wang, Kaidi Wan, Shien Sun, Zhijun Zhou   +5 more
doaj   +1 more source

Optimization of Pre-Chamber Geometry and Operating Parameters in a Turbulent Jet Ignition Engine

Energies, 2022
A turbulent jet ignition engine enables operation with lean mixtures, decreasing nitrogen oxide (NOX) emissions up to 92%, while the engine efficiency can be increased compared to conventional spark-ignition engines.
Viktor Dilber, Momir Sjerić, Rudolf Tomić, Josip Krajnović, Sara Ugrinić, Darko Kozarac   +5 more
doaj   +1 more source

Numerical Investigation on the Performance of a 4-Stroke Engine with Different Passive Pre-Chamber Geometries Using a Detailed Chemistry Solver

Energies, 2022
Pre-chamber turbulent jet ignition represents one of the most promising techniques to improve spark ignition engines efficiency and reduce pollutant emissions.
Simone Bigalli, Iacopo Catalani, Francesco Balduzzi, Nicola Matteazzi, Lorenzo Agostinelli, Michele De Luca, Giovanni Ferrara   +6 more
doaj   +1 more source

Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen

Pojazdy Szynowe, 2023
The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion ...
Ireneusz Pielecha, Filip Szwajca, Kinga Skobiej   +2 more
doaj   +1 more source