Results 1 to 10 of about 345,573 (231)

Custom-Designed Pre-Chamber: Investigating the Effects on Small SI Engine in Active and Passive Modes [PDF]

Energies, 2023
This work shows the results of an experimental campaign carried out in two spark ignition engines, a small optical research engine and its commercial counterpart, using a turbulent ignition system (pre-chamber) specifically designed for small engines ...
Paolo Sementa, Cinzia Tornatore, Francesco Catapano, Silvana Di Iorio, Bianca Maria Vaglieco   +4 more
doaj   +2 more sources

A Quasi-Dimensional Model of Pre-Chamber Spark-Ignition Engines [PDF]

SAE Technical Paper Series, 2019
<div class="section abstract"><div class="htmlview paragraph">Increasingly stringent pollutant and CO₂ emission standards require the car manufacturers to investigate innovative solutions to further improve the fuel economy of their fleets.
Bozza, Fabio, De Bellis, Vincenzo, Tufano, Daniela, Malfi, Enrica, Müller, Christoph, Habermann, Knut   +5 more
openaire   +4 more sources

Influence of Pre-Chamber Volume, Orifice Diameter and Orifice Number on Performance of Pre-Chamber SI Engine—An Experimental and Numerical Study

Energies, 2023
This paper presented an experimental and numerical study of pre-chamber volume, number of orifices and orifice diameter influence on engine performance and emissions.
Rudolf Tomić, Momir Sjerić, Josip Krajnović, Sara Ugrinić   +3 more
doaj   +2 more sources

A Numerical Investigation of Pre-chamber Combustion Engines

, 2020
This work aims to enhance fundamental and practical understanding of pre-chamber (PC) combustion engines, using computational fluid dynamics (CFD) simulations conducted with the software CONVERGE employing the Reynolds-averaged Navier-Stokes turbulence closure and the well-stirred reactor combustion model for methane oxidation.
Mickael Silva
openaire   +4 more sources

An Experimental Study on the Effects of Pre-Chamber Geometry on the Combustion Characteristics of Ammonia/Air Mixtures Using Turbulent Jet-Post Spark Ignition Strategy

Energies
As a carbon-free fuel, ammonia faces challenges in engine applications due to its low flame propagation speed and high ignition energy. The pre-chamber turbulent jet-post spark ignition strategy (TJ-PSI) has been proven effective in accelerating the ...
Yichen Gao, Xipu Zhang, Yang Cao, Jiashen Zhang, Rongjie Li, Huimin Wu, Shijun Dong, Zhaowen Wang   +7 more
doaj   +2 more sources

Controllability of Pre-Chamber Induced Homogeneous Charge Compression Ignition and Performance Comparison with Pre-Chamber Spark Ignition and Homogeneous Charge Compression Ignition [PDF]

Applied Sciences
This paper presents an experimental and numerical evaluation of the pre-chamber induced HCCI combustion concept (PC-HCCI) in terms of engine performance, emissions, and controllability.
Josip Krajnović, Sara Ugrinić, Viktor Dilber, Darko Kozarac   +3 more
doaj   +2 more sources

THE PRE-TRIAL CHAMBER JUDGE [PDF]

Challenges of the Knowledge Society, 2014
The importance of this work lies in important changes in the new Code of Criminal Procedure, amendments justified by the new realities of a democratic society in which criminal procedural rules must be adapted according to the daily realities in the ...
Edgar Laurenţiu DUMBRAVĂ
doaj   +4 more sources

Continuous wave doppler pre-attenuation velocity envelope: a promising tool for the echocardiographic assessment of aortic stenosis [PDF]

Echo Research and Practice
Background In this study, we evaluated the utility of the continuous wave (CW) Doppler pre-attenuation velocity envelope as a potential surrogate for pulsed-wave (PW) Doppler-based interrogation of left ventricular outflow tract (LVOT) flow in patients ...
Maria Riasat, Swiri Konje, Alaa Mabrouk Salem Omar, Vikram Agarwal, Edgar Argulian   +4 more
doaj   +2 more sources

Experimental study on the effect of pre-chamber structural parameters on combustion and emissions characteristics of ethanol pre-chamber engine

Case Studies in Thermal Engineering
To achieve low-carbon and sustainable development in the automotive industry, ethanol pre-chamber engines offer significant technical potential. The structural parameters of the pre-chamber significantly influence the formation of the pre-chamber spray ...
Kaichang Lai, Fangxi Xie, Hong Chen, Jiakun Du, Xiaoxiao Jiang, Jingxun Yang   +5 more
doaj   +2 more sources

Effect of structural parameters of active pre-chamber on ammonia/hydrogen premixed combustion process: A numerical investigation

Case Studies in Thermal Engineering
The development of zero-carbon fuels is of great significance for reducing carbon emissions. Using an ammonia/hydrogen mixture as fuel, the combustion in engine through an active pre-chamber has a good effect on reducing carbon emissions.
Zhe Kang, Da Peng, Jing Luo, Yang Lv, Lan Li   +4 more
doaj   +2 more sources