Article
Version 1
Preserved in Portico This version is not peer-reviewed
Nozzle Design of Plug-and-Play Passive Pre-chamber Ignition Systems for Natural Gas Engines
Version 1
: Received: 27 June 2023 / Approved: 27 June 2023 / Online: 28 June 2023 (02:17:10 CEST)
A peer-reviewed article of this Preprint also exists.
Li, W.; Ma, J.; Zhu, T.; Wei, H.; Pan, J. Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines. Appl. Sci. 2023, 13, 9468. Li, W.; Ma, J.; Zhu, T.; Wei, H.; Pan, J. Nozzle Design of Plug-and-Play Passive Pre-Chamber Ignition Systems for Natural Gas Engines. Appl. Sci. 2023, 13, 9468.
Abstract
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.
Keywords
Natural gas engine; Turbulent jet ignition; Pre-chamber; Scavenging; Fuel consumption
Subject
Engineering, Energy and Fuel Technology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment