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Energies
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Advanced Techniques for Low/Zero-Carbon Combustion in Internal Combustion Engines
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Advanced Techniques for Low/Zero-Carbon Combustion in Internal Combustion Engines

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I2: Energy and Combustion Science".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 3594
The paper submitted to the Special Issue will be processed and published immediately if it's accepted after peer-review.
Please contact the guest editor or the journal editor ([email protected]) for any queries.

Special Issue Editor

Dr. Xiangyu Meng

E-Mail Website
Guest Editor
School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Interests: advanced combustion techniques in ICEs; low-/zero-carbon fuels; optical diagnostics for spray and combustion

Special Issue Information

Dear Colleagues,

The reduction in fuel consumption and emissions for internal combustion engines (ICEs) is always the goal of researchers and manufacturers. As greenhouse gas emissions have been given great attention, they represent both an opportunity and a challenge for the technical development of ICEs toward carbon neutrality. In the medium to long term, advanced engine combustion technologies still offer significant contributions for the improvements of efficiency and exhaust emissions. The applications of low-/zero-carbon fuels, carbon-neutral biofuels, and synthetic fuels in ICEs can also benefit carbon reduction. Research is needed to offer efficient utilization of these alternative fuels for vehicles, ships, and power generation. In addition, the related advanced technologies including engine after-treatment, thermal and energy management, real-time combustion control, and so on, are of great importance for future engines as well.

Researchers are invited to submit original research papers and review articles which will make efforts to deal with the topics of interest. The topics in this Special Issue include but are not limited to:

  • Alternative fuels;
  • Advanced combustion modes;
  • Combustion and emissions chemistry;
  • Optimization of performance and emissions;
  • After-treatment technology and systems;
  • Engine thermal and energy management;
  • Engine combustion control;
  • Fuel injection systems and spray technology.

Dr. Xiangyu Meng
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • alternative fuels
  • advanced combustion modes
  • combustion and emissions chemistry
  • optimalization of performance and emissions
  • after-treatment technology and systems
  • engine thermal and energy management
  • engine combustion control
  • fuel injection systems and spray technology

Published Papers (2 papers)

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Research

16 pages, 2945 KiB  
Article
Numerical Investigation on the Jet Characteristics and Combustion Process of an Active Prechamber Combustion System Fueled with Natural Gas
by Lina Xu, Gang Li, Mingfa Yao, Zunqing Zheng and Hu Wang
Energies 2022, 15(15), 5356; https://doi.org/10.3390/en15155356 - 24 Jul 2022
Cited by 4 | Viewed by 1400
Abstract
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 cyclic stability. In the present study, the [...] Read more.
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 cyclic stability. In the present study, the effects of charge concentration stratifications inside the prechamber on the jet characteristics and combustion process were numerically investigated using CONVERGE software coupled with a reduced methane mechanism by the coupling control of spark timing and prechamber global equivalence ratio. The results show that the jet characteristics and ignition mechanisms can be regulated by controlling the prechamber global equivalence ratio and spark timing. On the one hand, as the prechamber global equivalence ratio increases, the velocity of the jet increases firstly and then decreases, the temperature drops, and OH and CH2O radicals are reduced, but the stable combustion intermediates, CO and H2, are increased. Thus, the ignition mechanism changes from flame ignition (ignition by flame and reactive radicals) to jet ignition (ignition by hot combustion intermediates), and the ignition delay is shortened, but the combustion duration is extended, mainly due to more of the combustion intermediates, CO and H2, downstream of the jet. On the other hand, as spark timing is advanced, the jet velocity and the mass of the OH and CH2O radicals increase, which is conducive to flame ignition, and the ignition delay and combustion duration are reduced. Full article
(This article belongs to the Special Issue Advanced Techniques for Low/Zero-Carbon Combustion in Internal Combustion Engines)
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18 pages, 2161 KiB  
Article
Experimental Studies of Low-Load Limit in a Stoichiometric Micro-Pilot Diesel Natural Gas Engine
by Vinicius Bonfochi Vinhaes, Gordon McTaggart-Cowan, Sandeep Munshi, Mahdi Shahbakhti and Jeffrey D. Naber
Energies 2022, 15(3), 728; https://doi.org/10.3390/en15030728 - 19 Jan 2022
Cited by 6 | Viewed by 1731
Abstract
While operating at light loads, diesel pilot-ignited natural gas engines with lean premixed natural gas suffer from poor combustion efficiency and high methane emissions. This work investigates the limits of low-load operation for a micro-pilot diesel natural gas engine that uses a stoichiometric [...] Read more.
While operating at light loads, diesel pilot-ignited natural gas engines with lean premixed natural gas suffer from poor combustion efficiency and high methane emissions. This work investigates the limits of low-load operation for a micro-pilot diesel natural gas engine that uses a stoichiometric mixture to enable methane and nitrogen oxide emission control. By optimizing engine hardware, operating conditions, and injection strategies, this study focused on defining the lowest achievable load while maintaining a stoichiometric equivalence ratio and with acceptable combustion stability. A multi-cylinder diesel 6.7 L engine was converted to run natural gas premix with a maximum diesel micro-pilot contribution of 10%. With a base diesel compression ratio of 17.3:1, the intake manifold pressure limit was 80 kPa(absolute). At a reduced compression ratio of 15:1, this limit increased to 85 kPa, raising the minimum stable load. Retarding the combustion phasing, typically used in spark-ignition engines to achieve lower loads, was also tested but found to be limited by degraded diesel ignition at later timings. Reducing the pilot injection pressure improved combustion stability, as did increasing pilot quantity at the cost of lower substitution ratios. The lean operation further reduced load but increased NOx and hydrocarbon emissions. At loads below the practical dual-fuel limit, a transition to lean diesel operation will likely be required with corresponding implications for the aftertreatment system. Full article
(This article belongs to the Special Issue Advanced Techniques for Low/Zero-Carbon Combustion in Internal Combustion Engines)
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