Author
Junjun Ma
Bio: Junjun Ma is an academic researcher from Shanghai Jiao Tong University. The author has contributed to research in topics: Combustion & Ignition system. The author has an hindex of 8, co-authored 15 publications receiving 328 citations.
Topics: Combustion, Ignition system, Diesel engine, Ignition timing, NOx
Papers
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TL;DR: In this article, an experimental study of port injected n-heptane homogeneous charge compression ignition (HCCI) in combination with in-cylinder diesel fuel direct injection (DI) was conducted on a single cylinder diesel engine.
133 citations
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TL;DR: In this article, a single-cylinder, four-stroke, natural-aspirated direct injection engine at a fixed speed was investigated with premixed ethanol by port injection.
72 citations
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TL;DR: In this article, the effects of isooctane injection timing, active-thermal atmosphere intensity, overall equivalence ratio, and premixed ratio on combustion characteristics and emissions are investigated.
44 citations
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TL;DR: In this paper, the combustion stabilities and cycle-by-cycle variations of n-heptane homogeneous charge compression ignition (HCCI) combustion were investigated, and in-cylinder pressures of 100 combus...
Abstract: In this paper, the combustion stabilities and cycle-by-cycle variations of n-heptane homogeneous charge compression ignition (HCCI) combustion were investigated. In-cylinder pressures of 100 combus...
20 citations
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TL;DR: In this paper, the authors investigated the potential of stratified charge compression ignition (SCCI) to extend the high-load limits of homogeneous charge compression injection (HCCI), and found that SCCI could achieve a staged combustion event of reduced pressure rise rates, thus offering good potential to expand the operating range of the HCCI engine.
Abstract: This work investigates the potential of stratified charge compression ignition (SCCI) to extend the high-load limits of homogeneous charge compression ignition (HCCI) engine Engine experiments were conducted on a single-cylinder diesel engine equipped with an electrical port fuel injection system When the n-heptane fuel amount of port injection and in-cylinder direct injection was calibrated, partial fuel stratification was created and three different combustion modes as SCCI, HCCI, and direct injection compression ignition (DICI) were achieved The premixed ratio (rp) was used to indicate the partial fuel stratification, and the effects of premixed ratio on SCCI combustion were examined It was found that SCCI could achieve a staged combustion event of reduced pressure-rise rates, thus offering good potential to expand the operating range of the HCCI engine Also, the engine performance and emission characteristics of SCCI were evaluated, focusing on the comparison with the HCCI and conventional DICI c
19 citations
Cited by
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TL;DR: The most prominent characteristic of new combustion modes, such as HCCI, Stratified-charge Compression-Ignition (SCCI), and Low-Temperature Combustion (LTC), is the requirement of creating a homogenous mixture or controllable stratified mixture prior to ignition as discussed by the authors.
466 citations
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TL;DR: Low temperature combustion (LTC) is an advanced combustion concept for internal combustion (IC) engines, which has attracted global attention in recent years as discussed by the authors, which offers prominent benefits in terms of simultaneous reduction of both oxides of nitrogen (NO x ) and particulate matter (PM), in addition to reduction in specific fuel consumption (SFC).
320 citations
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TL;DR: In this paper, the effects of biodiesel/diesel additives on the performance and emissions of diesel engines were comprehensively reviewed throughout this article, and the opportunities and limitations of each additive considering both engine performance and combustion benignity were outlined to guide future research and development in the domain.
276 citations
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TL;DR: In this article, the authors present a literature review on ignition delay (ID), combustion and emission characteristics of biodiesel fueled diesel engine and report that the combustion characteristics of bio-fueled engine is slightly different from the engine running with petroleum diesel.
Abstract: Biodiesels are gaining more importance as a promising alternative energy resource. Engine performance and emission characteristics of unmodified biodiesel fueled diesel engines are highly influenced by its ignition and combustion behavior. This review article presents the literature review on ignition delay (ID), combustion and emission characteristics of biodiesel fueled diesel engine. More than hundred articles report which have been published mostly in the last decade are reviewed in this paper. The investigation results report that the combustion characteristics of bio fueled engine is slightly different from the engine running with petroleum diesel. Most of the investigation results have reported that as compared to diesel, biodiesel has early start of combustion (SOC) and shorter ID of between 1–5° and 0.25–1.0°, respectively. Higher cetane number (CN), lower compressibility and fatty acid composition of biodiesel have been identified as the main elements for early SOC and shorter ID. In addition, it is also found that, the heat release rate (HRR) of biodiesel is slightly lower than diesel owing to the lower calorific value, lower volatility, shorter ID and higher viscosity.
257 citations
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TL;DR: In this paper, the effect of antioxidant additives on NOx emissions in a jatropha methyl ester fuelled direct injection diesel engine have been investigated experimentally and compared with conventional diesel fuel.
223 citations