Download or read book Experimental Investigation of Gasoline di methyl Ether Dual Fuel CAI Combustion with Internal EGR written by Haofan Zhang and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new dual fuel Controlled Auto-Ignition (CA!) combustion concept was proposed and researched for lower exhaust emissions and better fuel economy. The concept takes the advantage of the complementary physical and chemical properties of high octane number gasoline and high cetane number Di-Methyl Ether (DME) to organize the combustion process. Homogeneous gasoline/air mixture is utilized as the main combustible charge, which is realised by a low-cost Port Fuel Injection (PFI) system. Pressurised DME is directly injected into cylinder via a commercial Gasoline Direct Injection (GDI) injector. Flexible DME injection strategies are employed to realise the controlled auto ignition of the premixed charge. The engine is operated at Wide Open Throttle (WOT) in the entire operating region in order to minimize the intake pumping loss. Engine load is controlled by varying the amount of internal Exhaust Gas Recirculation (iEGR) which is achieved and adjusted by Positive Valve Overlap (PVO) and/or exhaust back pressure, and exhaust re- breathing method. The premixed mixture can be of either stoichiometric air/fuel ratio or fuel lean mixture and is heated and diluted by recycled exhaust gases. The use of internal EGR is considered as a very effective method to initiate CAI combustion due to its heating effect and moderation of the heat release rate by its dilution effect. In addition, the new combustion concept is compared to conventional SI combustion. The results indicate that the new combustion concept has potential for high efficiency, low emissions, enlargement of the engine operational region and flexible control of CAI combustion.
Download or read book Internal Combustion Engines and Powertrain Systems for Future Transport 2019 written by IMECHE and published by CRC Press. This book was released on 2020-03-09 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the changing landscape of the transport sector, there are also alternative powertrain systems on offer that can run independently of or in conjunction with the internal combustion (IC) engine. This shift has actually helped the industry gain traction with the IC Engine market projected to grow at 4.67% CAGR during the forecast period 2019-2025. It continues to meet both requirements and challenges through continual technology advancement and innovation from the latest research. With this in mind, the contributions in Internal Combustion Engines and Powertrain Systems for Future Transport 2019 not only cover the particular issues for the IC engine market but also reflect the impact of alternative powertrains on the propulsion industry. The main topics include: • Engines for hybrid powertrains and electrification • IC engines • Fuel cells • E-machines • Air-path and other technologies achieving performance and fuel economy benefits • Advances and improvements in combustion and ignition systems • Emissions regulation and their control by engine and after-treatment • Developments in real-world driving cycles • Advanced boosting systems • Connected powertrains (AI) • Electrification opportunities • Energy conversion and recovery systems • Modified or novel engine cycles • IC engines for heavy duty and off highway Internal Combustion Engines and Powertrain Systems for Future Transport 2019 provides a forum for IC engine, fuels and powertrain experts, and looks closely at developments in powertrain technology required to meet the demands of the low carbon economy and global competition in all sectors of the transportation, off-highway and stationary power industries.
Download or read book An Experimental Investigation on Combustion and Engine Performance and Emissions of a Methane gasoline Dual fuel Optical Engine written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF DUAL FUEL DIESEL NATURAL GAS RCCI COMBUSTION IN A HEAVY DUTY DIESEL ENGINE written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : Among the various alternative fuels, natural gas is considered as a leading candidate for heavy-duty applications due to its availability and applicability in conventional internal combustion diesel engines. Compared to their diesel counterparts natural gas fueled spark-ignited engines have a lower power density, reduced low-end torque capability, limited altitude performance, and ammonia emissions downstream of the three-way catalyst. The dual fuel diesel/natural gas engine does not suffer with the performance limitations of the spark-ignited concept due to the flexibility of switching between different fueling modes. Considerable research has already been conducted to understand the combustion behavior of dual fuel diesel/natural gas engines. As reported by most researchers, the major difficulty with dual fuel operation is the challenge of providing high levels of natural gas substitution, especially at low and medium loads. In this study extensive experimental and simulation studies were conducted to understand the combustion behavior of a heavy-duty diesel engine when operated with compressed natural gas (CNG) in a dual fuel regime. In one of the experimental studies, conducted on a 13 liter heavy-duty six cylinder diesel engine with a compression ratio of 16.7:1, it was found that at part loads high levels of CNG substitution could be achieved along with very low NOx and PM emissions by applying reactivity controlled compression ignition (RCCI) combustion. When compared to the diesel-only baseline, a 75% reduction in both NOx and PM emissions was observed at a 5 bar BMEP load point along with comparable fuel consumption values. Further experimental studies conducted on the 13 liter heavy-duty six cylinder diesel engine have shown that RCCI combustion targeting low NOx emissions becomes progressively difficult to control as the load is increased at a given speed or the speed is reduced at a given load. To overcome these challenges a number of simulation studies were conducted to quantify the in-cylinder conditions that are needed at high loads and low to medium engine speeds to effectively control low NOx RCCI combustion. A number of design parameters were analyzed in this study including exhaust gas recirculation (EGR) rate, CNG substitution, injection strategy, fuel injection pressure, fuel spray angle and compression ratio. The study revealed that lowering the compression ratio was very effective in controlling low NOx RCCI combustion. By lowering the base compression ratio by 4 points, to 12.7:1, a low NOx RCCI combustion was achieved at both 12 bar and 20 bar BMEP load points. The NOx emissions were reduced by 75% at 12 bar BMEP while fuel consumption was improved by 5.5%. For the 20 BMEP case, a 2% improvement in fuel consumption was achieved with an 87.5% reduction in NOx emissions. At both load points low PM emissions were observed with RCCI combustion. A low NOx RCCI combustion system has multiple advantages over other combustion approaches, these include; significantly lower NOx and PM emission which allows a reduction in aftertreatment cost and packaging requirements along with application of higher CNG substitution rates resulting in reduced CO2 emissions.
Download or read book Chemical Biological and Environmental Engineering Proceedings of the International Conference on Cbee 2009 written by Li Kai and published by World Scientific. This book was released on 2010 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Held in Singapore from 9 to 11 October 2009, the 2009 International Conference on Chemical, Biological and Environmental Engineering (CBEE 2009) aims to provide a platform for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research and development activities in chemical, biological and environmental engineering. Conference delegates will also have the opportunity to exchange new ideas and application experiences, establish business or research relations and find global partners for future collaboration. Sample Chapter(s). Chapter 1: The Future of Biopharmaceutics'' Production (92 KB). Contents: Study on Pyrolysis Characteristics of Electronic Waste (J Sun et al.); Application of Noise Mapping on Environmental Management (K-T Tsai et al.); Characteristics and Transport Properties of Two Modified Zero Valent Iron (Y-H Lin et al.); Synthesis of Visible Light Active N-Doped Titania Photocatalyst (C Kusumawardani et al.); CFD-PBM Modeling of Vertical Bubbly Flows (M R Rahimi & H Karimi); Hydrotalcite-Like Synthesis Using Magnesium from Brine Water (E Heraldy et al.); Cement/Activated-Carbon Solidification/Stabilization Treatment of Nitrobenzene (Z Su et al.); Investigation of Fish Species Biodiversity in Haraz River (I Piri et al.); Risk Assessment of Fluoride in Indian Context (V Chaudhary & M Kumar); Light Transmission In Fluidized Bed (E Shahbazali et al.); Drying of Mushroom Using a Solar Tunnel Dryer (M A Basunia et al.); and other papers. Readership: Researchers, engineers, academicians and industrial professionals in related fields of chemical, biological and environmental engineering.
Download or read book Experimental Investigation of DME Assisted Gasoline CAI Combustion with Re breathing Valve Strategy written by Kangwoo Seo and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Investigation of Diesel ignited Gasoline and Diesel ignited Methane Dual Fuel Concepts in a Single Cylinder Research Engine written by Umang Dwivedi and published by . This book was released on 2013 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel-ignited gasoline and diesel-ignited methane dual fuel combustion experiments were performed in a single-cylinder research engine (SCRE), outfitted with a common-rail diesel injection system and a stand-alone engine controller. Gasoline was injected in the intake port using a port-fuel injector, whereas methane was fumigated into the intake manifold. The engine was operated at a constant speed of 1500 rev/min, a constant load of 5.2 bar IMEP, and a constant gasoline/methane energy substitution of 80%. Parameters such as diesel injection timing (SOI), diesel injection pressure, and boost pressure were varied to quantify their impact on engine performance and engineout ISNOx, ISHC, ISCO, and smoke emissions. The change in combustion process from heterogeneous combustion to HCCI like combustion was also observed.
Download or read book Dimethyl Ether a rural fuel from water and carbon dioxide written by Johann Gruber-Schmidt and published by GRIN Verlag. This book was released on 2018-07-30 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technischer Bericht aus dem Jahr 2018 im Fachbereich Energiewissenschaften, , Veranstaltung: Erneuerbare Treibstoffe, Sprache: Deutsch, Abstract: DME known as dimethyl ether, is a well known chemical substance, the simplest ether, with the chemical structure CH3-O-CH3, consisting of one oxygen atom, two carbon atoms, and six hydrogen atoms. If we us Dimethyl ether as fuel, we recognize, that this fuel brings in one oxygen atom and has six hydrogen atoms. If we compare with methanol (CH3-OH), which has only four hydrogen atoms, dimethyl ether as simplest ether can also be seen as hydrogen carrier. The thermodynamic properties of Dimethyl ether, show that dimethyl ether is liquid at room temperature T=25°C and a pressure of p=6 bar. It is well known that dimethyl ether can be used as an substitute of fossil Diesel fuel, as a synthetic formed Diesel substitute, with highly advanced combustion properties and very low emissions in carbon monoxide(CO), dust and soot and nitrogen oxide(NO2). It easy to handle with the well known LPG (liquid propane gas) technology and can be easily and cheap implemented into heavy Diesel engines. The application of dimethyl ether is wide: transportation, agriculture, civil and rural hotel sector.
Download or read book Advances in Compression Ignition Natural Gas Diesel Dual Fuel Engines written by Hongsheng Guo and published by Frontiers Media SA. This book was released on 2021-03-23 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combustion of Natural Gas Augmented with Dimethyl Ether Performed in a Homogeneous Charge Compression Ignited Engine written by John Reyes Torres and published by . This book was released on 1999 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 2005 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HCCI and CAI Engines for the Automotive Industry written by Hua Zhao and published by CRC Press. This book was released on 2007-09-10 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogeneous charge compression ignition (HCCI)/controlled auto-ignition (CAI) has emerged as one of the most promising engine technologies with the potential to combine fuel efficiency and improved emissions performance, offering reduced nitrous oxides and particulate matter alongside efficiency comparable with modern diesel engines. Despite the considerable advantages, its operational range is rather limited and controlling the combustion (timing of ignition and rate of energy release) is still an area of on-going research. Commercial applications are, however, close to reality. HCCI a.
Download or read book A computational and experimental study on combustion processes in natural gas diesel dual fuel engines written by Andrew Hockett and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Investigation of Manifold Gases of High Speed Internal Combustion Engines by Commercial Indicators written by James Ray Schermerhorn and published by . This book was released on 1928 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental and Numerical Study on the Promoting Effect of Dimethyl Ether on the Ignition Delay Time of Methane written by Raquel Ruiz González and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding and domination of energy is one of the goals the human mankind has always followed, but it has never had as much importance as it has nowadays. At present, more of 90 % of the total amount of energy support in the world is provided by combustion [Warnatz et al. (2006)]. Due to the pollution problems and restrictions this process has attached, the search of alternative fuels, i.e. those which can be classified as renewable, less contaminant or cheaper and that do not proceed from petroleoum, is the order of the day [Reyes Gonzalez et al.]. Not only alternative energy sources for producing electricity but also new fuel technologies for propulsion use are being deeply investigated. One of the most extended alternative fuel for mobility use is methane (CH4), the simplest alkane, due to the fact that is one of which emit less contaminant substances to the atmosphere, is abundant and economical [Zinner (2008)]. Its oxidation characteristics can be adjusted quite easily by means of adding trace amounts of other fuels [Spadaccini and Colket III (1994)]. One of the best suited additives for achieveing this is the dimethyl ether or DME (C2H6O), because is not only a good ignition enhancer for propulsion systems and internal combustion engines but also reduces the particulate and NOX emissions [Mittal et al. (2008a)]. Furthermore, its physical properties are similar to those of Liquified Petroleum Gases (LPG), so dimethyl ether can be stored and distributed using the already established LPG infrastructures [Mittal et al. (2008a)]. In this study an important feature of the fuels, the ignition-delay time, is widely investigated using methane in combination with dimethyl ether as the fuel mixture basis, with the aim of determine the differences regarding the variations in the composition and physical conditions of the mixture.
Download or read book Pathways for Low Emissions Utilizing Spray Targeted Reactivity Stratification STARS in High Efficiency Natural Gas Dual Fuel Combustion written by James S Harris and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal combustion engines are a key aspect of society, and their continued use poses challenges from an environmental standpoint since they emit pollutant and greenhouse gas emissions. This dissertation focuses on experimental analysis of dual-fuel low temperature combustion (LTC), which can be used as a strategy to reduce engine-out emissions and increase engine efficiencies. Dual fuel LTC uses two different fuels, a high reactivity fuel (HRF) and a low reactivity fuel (LRF). The HRF has a higher cetane number than the LRF, which allows for easier auto-ignition in compression ignition engines. Dual fuel engines also utilize high air to fuel ratios to achieve LTC. This, combined with early injection timings of the HRF, helps to reduce oxides of nitrogen (NOx) emissions. At low load conditions, this is a problem since higher cycle-to-cycle variations can increase pollutants such as unburned hydrocarbons (UHC) and carbon monoxide (CO). To combat this, a firm understanding of dual fuel LTC is required, as well as a strategy for reducing the cycle-to-cycle variations. The first part of this work further identifies a combustion heat release 'transformation region' across different HRF injection timings wherein in-cylinder conditions arise that are conducive for ultra-low NOx emissions. This phenomenon occurs for different IC engine platforms and different fueling combinations. An experimental analysis, 0D chemical kinetic analysis, and 3D computation fluid dynamic (CFD) analysis were combined to elucidate the underlying causes for this phenomenon. The local stratification level of the fuel/air mixture was identified as the likely cause of combustion heat release transformation with changing HRF injection timing. The second part of the present work builds upon the findings of the first part by utilizing local stratification to mitigate cycle-to-cycle variations that are present at low loads. A framework of experiments was formulated for both a low engine load of 5 bar gross indicated mean effective pressure (IMEPg) and a high load of 15 bar IMEPg, wherein an injection strategy concept termed Spray TArgeted Reactivity Stratification (STARS) was utilized using both diesel and Polyoxymethelene-dimethyl-ether (POMDME) as HRFs. A steep decrease in UHC and CO emissions (> 80% reductions) as well as improved engine operation stability were demonstrated using both HRFs with dual fuel LTC at 5 bar IMEPg. Further, potential for emissions mitigation and efficiency improvement are discussed, as well as differences in the experimental results shown between the differing HRFs.
Download or read book An Experimental Investigation of Dual injection Strategies on Diesel methane Dual fuel Low Temperature Combustion in a Single Cylinder Research Engine written by Aamir Sohail and published by . This book was released on 2015 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present manuscript discusses the performance and emission benefits due to two diesel injections in diesel-ignited methane dual fuel Low Temperature Combustion (LTC). A Single Cylinder Research Engine (SCRE) adapted for diesel-ignited methane dual fuelling was operated at 1500 rev/min and 5 bar BMEP with 1.5 bar intake manifold pressure. The first injection was fixed at 310 CAD. A 2nd injection sweep timing was performed to determine the best 2nd injection timing (as 375 CAD) at a fixed Percentage Energy Substitution (PES 75%). The motivation to use a second late injection ATDC was to oxidize Unburnt Hydrocarbons (HC) generated from the dual fuel combustion of first injection. Finally, an injection pressure sweep (550-1300 bar) helped achieve simultaneous reduction of HC (56%) and CO (43%) emissions accompanied with increased IFCE (10%) and combustion efficiency (12%) w.r.t. the baseline single injection (at 310 CAD) of dual fuel LTC.
