Experimental Investigation on Emission Characteristics of Diesel N-Pentanol Blend in Homogeneous Charged Compression Ignition Engine

2021 ◽  
Vol 13 (3) ◽  
Author(s):  
S. Mathavan ◽  
T. Mothilal ◽  
V. Andal ◽  
V. Velukumar
Keyword(s):  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Injection Timing ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Fuel Blend ◽  
Fuel Injection Pressure

The invention of internal combustion engines is undoubtedly one of the greatest inventions of the modern era. There has been steady scientific research to look for alternative fuel which is economical, renewable and less harmful to nature and man compared to fossil fuels. The present project is one such experimental work to investigate the performance of a blend of diesel / N-pentanol in an appropriate combustion technique and to establish its suitability as a renewable fuel. The relative performance of diesel fuel and the blend of diesel / n-pentanol will also be analyzed. Diesel fuel blended with 30 percentage n-pentanol is the fuel blend that is proposed to be used in the experiment. Researchers have established that the application of Homogeneously Charged Compression Ignition (HCCI) technique could result in in-cylinder reduction of NOx and PM. Higher thermal efficiency could also be attained. The project also covers studying the emission effect of the diesel/n-pentanol fuel blend for various fuel injection timing, various fuel injection pressure, different EGR rates and different inlet air temperature.

A Study on the Performance and Emissions Characteristics of a DI Compression Ignition Engine Operated With LPG and DTBP Blending Fuels

2011 ◽  
Author(s):  
Hoin Kang ◽  
Jerald A. Caton ◽  
Seangwock Lee ◽  
Seokhwan Lee ◽  
Seungmook Oh
Keyword(s):  
Combustion Chamber ◽  
Fuel Injection ◽  
Ambient Pressure ◽  
Injection Pressure ◽  
Chamber Pressure ◽  
Injection Timing ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Bench Tests ◽  
Fuel Injection Pressure

LPG (Liquefied Petroleum Gas) has been widely used as an alternative fuel for gasoline and diesel vehicles in light of clean fuel and diversity of energy resources. But conventional LPG vehicles using carburetors or MPI fuel injection systems can’t satisfy the emissions regulations and CO2 targets of the future. Therefore, it is essential to develop LPG engines of spark ignition or compression ignition type such that LPG fuel is directly injected into the combustion chamber under high pressure. A compression ignition engine using LPG is the ideal engine with many advantages of fuel economy, heat efficiency and low CO2, even though it is difficult to develop due to the unique properties of LPG. This paper reports on numerical and experimental studies related to LPG fuel for a compression ignition engine. The numerical analysis is conducted to study the combustion chamber shape with CATIA and to analyze the spray and fluid behaviors with FLUENT for diesel and LPG (n-butane 100%) fuels. In one experimental study, a constant volume chamber is used to observe the spray formation for the chamber pressure 0 to 3MPa and to analyze the flame process, P-V diagram, heat release rate and emissions through the combustion of LPG fuel with the cetane additive DTBP (Di-tert-butyl peroxide) 5 to 15 wt% at 25MPa of fuel injection pressure. In engine bench tests, experiments were performed to find the optimum injection timing, lambda, COV and emissions for the LPG fuel with the cetane additive DTBP 5 to 15 wt% at 25MPa fuel injection pressure and 1500 rpm. The penetration distance of LPG (n-butane 100%) was shorter than that of diesel fuel and LPG was sensitive to the chamber pressure. The ignition delay was in inverse proportion to the ambient pressure linearly. In the engine bench tests, the optimum injection timing of the test engine to the LPG fuel with DTBP 15 wt% was about BTDC 12° CA at all loads and 1500 rpm. An increasing of DTBP blending ratio caused the promotion of flame and fast burn and this lead to reduce HC and CO emissions, on the other hand, to increase NOx and CO2 emissions.

scholarly journals Influence of Fuel Injection Pressure on the Emissions Characteristics and Engine Performance in a CRDI Diesel Engine Fueled with Palm Biodiesel Blends

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3837 ◽  
Author(s):  
Sam Ki Yoon ◽  
Jun Cong Ge ◽  
Nag Jung Choi
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Biodiesel Fuel ◽  
Nox Emissions ◽  
Oxides Of Nitrogen ◽  
Fuel Blend ◽  
Engine Load ◽  
Fuel Injection Pressure

This experiment investigates the combustion and emissions characteristics of a common rail direct injection (CRDI) diesel engine using various blends of pure diesel fuel and palm biodiesel. Fuel injection pressures of 45 and 65 MPa were investigated under engine loads of 50 and 100 Nm. The fuels studied herein were pure diesel fuel 100 vol.% with 0 vol.% of palm biodiesel (PBD0), pure diesel fuel 80 vol.% blended with 20 vol.% of palm biodiesel (PBD20), and pure diesel fuel 50 vol.% blended with 50 vol.% of palm biodiesel (PBD50). As the fuel injection pressure increased from 45 to 65 MPa under all engine loads, the combustion pressure and heat release rate also increased. The indicated mean effective pressure (IMEP) increased with an increase of the fuel injection pressure. In addition, for 50 Nm of the engine load, an increase to the fuel injection pressure resulted in a reduction of the brake specific fuel consumption (BSFC) by an average of 2.43%. In comparison, for an engine load of 100 Nm, an increase in the fuel injection pressure decreased BSFC by an average of 0.8%. Hydrocarbon (HC) and particulate matter (PM) decreased as fuel pressure increased, independent of the engine load. Increasing fuel injection pressure for 50 Nm engine load using PBD0, PBD20 and PBD50 decreased carbon monoxide (CO) emissions. When the fuel injection pressure was increased from 45 MPa to 65 MPa, oxides of nitrogen (NOx) emissions were increased for both engine loads. For a given fuel injection pressure, NOx emissions increased slightly as the biodiesel content in the fuel blend increased.

scholarly journals Optimization of Injection Pressure and Injection Timing on Fuel Sprays, Engine Performances and Emissions on a Developed DI 20C Biodiesel Engine Prototype

2020 ◽  
Vol 38 (4) ◽  
pp. 827-838
Author(s):  
Bambang Sudarmanta ◽  
Alham A.K. Mahanggi ◽  
Dori Yuvenda ◽  
Hary Soebagyo
Keyword(s):  
Fossil Fuels ◽  
Fuel Injection ◽  
Cetane Number ◽  
Injection Pressure ◽  
Injection Timing ◽  
Spray Characteristics ◽  
Injection Parameter ◽  
Optimal Injection ◽  
Fuel Injection Pressure ◽  
Start Of Combustion

Biodiesel, as a renewable fuel that has the potential to replace diesel fossil fuels. With properties in the form of viscosity, density, and surface tension, which are higher than diesel fossil fuel, biodiesel produces poor spray characteristics, and also the high cetane number and oxygen content so that the ignition delay is shorter causes the start of combustion will shift more forward, therefore need to improve injection parameters including injection pressure and timing. The aim of this research is to get the optimal injection parameter optimization so as to improve engine performances and emissions. The method used is to increase the fuel injection pressure from 200 to 230 kg/cm2 and the injection timings were retarded from 22° to 16° BTDC. The results show that increasing injection pressure can improve spray characteristics as indicated by shorter penetration and smaller spray diameter of 30% and 9.8%, respectively and increase in spray spread angle of 21.9%. Then the optimization of engine performances and emissions, obtained at an injection pressure of 230 kg/cm2 and injection timing of 16° BTDC with an increase of power and thermal efficiency of 3.9% and 13.9%, respectively and reduction in smoke emissions of 45.2% at high load.

scholarly journals Effect of port injection pressure on mixture quality in Homogeneous charges compression ignition (HCCI) engine

2021 ◽  
Vol 9 (2) ◽  
pp. 37-41
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Injection Pressure ◽  
The Other ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Fuel Injector ◽  
Compression Ignition Engine ◽  
Hcci Engine ◽  
Fuel Injection Pressure

The purpose of this study is to investigate the effect of fuelinjection pressure onhomogeneous charge formation and performanceand emission characteristics of Homogeneous charge compression ignition engine. The fuel injection pressure isone of the primary parameter for improvingthe homogeneity of the mixture and governing the power output and emission characteristics of HCCI engine. In this investigation, diesel fuelwasinjected at different injection pressuresas 2bar, 3bar, 4bar and 5bar respectively throughbyport fuel injector. The experimental investigationsshow that increasing the fuel injection pressure will promote the fuel to penetrate with air and creates well pre mixedair/fuel charge.The result shows, the specific fuel consumption (SFC) of HCCI engine isslightlyhigherthan the SFC of conventional diesel engine.The HCCI engine with 3bar injection pressure operated engine has lower SFC values compared to other injection pressure operated HCCI engine.The brake thermal efficiency of HCCI engine, operated with 3barinjection pressure has maximum BTE values over the other injection pressure operated engine.From theresult, it is observed that HCCI engine has lower smoke density values compared to conventional diesel engine andfurther reducedby increasing the fuel injection pressure. The 3bar injection pressure operated HCCI engine has emitted lower smoke densitycompared to other injection pressure operated HCCI engine. The 3bar injection pressureoperated HCCIengine hasemittedmaximum oxides of nitrogen (NOx) emissions than the other injection pressure operated HCCI engine. Other exhaust emissions of carbon monoxide (CO) and hydrocarbon (HC)emissions are increased when compared toconvention diesel engine

Effects of injection strategy on performance and emissions metrics in a diesel/methane dual-fuel single-cylinder compression ignition engine

2019 ◽  
Vol 20 (10) ◽  
pp. 1059-1072 ◽  
Author(s):  
Metin Korkmaz ◽  
Dennis Ritter ◽  
Bernhard Jochim ◽  
Joachim Beeckmann ◽  
Dirk Abel ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Deep Understanding ◽  
Injection Pressure ◽  
Dual Fuel ◽  
Injection Timing ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Single Cylinder ◽  
Cylinder Compression ◽  
The Impact

In order to counteract the drawbacks of conventional diesel combustion, which can lead to high indicated specific nitric oxide and indicated specific particulate matter emissions, a promising diesel-dual-fuel concept is investigated and evaluated. In this study, methane is used as supplement to liquid diesel fuel due to its benefits like high knock resistance and clean combustion. A deep understanding of the in-cylinder process is required for engine design and combustion controller development. To investigate the impact of different input parameters such as injection duration, injection timing, and substitution rate on varying output parameters like load, combustion phasing, and engine-out emissions, numerous investigations were conducted. Engine speed, global equivalence ratio, and injection pressure were held constant. The experiments were carried out in a modified single-cylinder compression ignition engine. The results reveal regimes with different dependencies between injection timing of diesel fuel and combustion phasing. This work demonstrates the potential of the diesel-dual-fuel concept by combining sophisticated combustion control with the favorable combustion mode. Without employing exhaust gas recirculation, TIER IMO 3 emissions limits are met while ensuring high thermal efficiency.

scholarly journals An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2280 ◽  
Author(s):  
Andrey Kozlov ◽  
Vadim Grinev ◽  
Alexey Terenchenko ◽  
Gennady Kornilov
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Injection ◽  
Fuel Efficiency ◽  
Combustion Process ◽  
Injection Pressure ◽  
Dual Fuel ◽  
Injection Timing ◽  
Fuel Supply ◽  
Pilot Fuel ◽  
Fuel Injection Pressure

Modern research in the area of internal combustion engines is focused on researching and investigating the technologies that will improve fuel efficiency and decrease emissions. Application of dual-fuel engines is considered as a potential solution to these problems. In the dual-fuel engine, a natural gas-air mixture is ignited by a small amount of the diesel fuel directly injected into a combustion chamber. Pilot fuel injection parameters can strongly effect the combustion process. The aim of this paper is to investigate the effect of such fuel-supply parameters as pilot fuel mass, pilot fuel injection pressure, pilot fuel injection timing and excess air ratio on the combustion process. Investigation is based on the data obtained during bench tests conducted with the use of measurement equipment. The dependences of engine characteristics from the fuel supply parameters under review were obtained based on the results of the experimental study. Optimal values for every investigated fuel-supply parameter were chosen based on the obtained results. Over the course of the investigation, the coefficient for heat release rate according to the Vibe equation was calculated for each operating point.

Impact of Fuel Injection Pressure on Spray and Combustion Characteristics of OME and Diesel Blends

2021 ◽  
Author(s):  
Simon LeBlanc ◽  
Xiao Yu ◽  
Gared Pisciotto ◽  
Xiaoye Han ◽  
Jimi Tjong ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Fuel Injection ◽  
Direct Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Combustion Efficiency ◽  
Particulate Emissions ◽  
Fuel Blend ◽  
Particulate Matter Emissions ◽  
Fuel Injection Pressure

Abstract Emission regulations focus on the simultaneous reduction of NOx and particulate matter emissions, especially for heavy-duty engines. Oxygenated fuels offer significant advantages in reducing particulate emissions while having little effect on NOx emissions. In addition, renewable fuels present a GHG emission advantage to meet the zero-emission requirements of future hydrocarbon fuels. Among the leading contenders, oxymethylene dimethyl ether (OME) fuels have the potential to be used for direct injection applications. OME as a blend with diesel fuel offers a direct means of improving the emissions of current on-road diesel engines without modification. In this paper, an empirical investigation into spray behavior and engine performance of diesel/OME fuel at 10% by mass has been performed under various fuel injection pressures. Neat diesel fuel was tested as a baseline case. The results are compared to tests under matching conditions using a diesel and OME fuel blend with a focus on spray characteristics, combustion behavior, and engine-out emissions. The physical properties of OME improve the volatility of diesel fuel and can tolerate shorter mixing times without promoting PM production. The PM emissions were found to be reduced by up to 50% and the combustion efficiency was improved at matching NOx levels with OME blending.

Application of Taguchi and response surface methodology approach to a sustainable model developed for a compression-ignition engine using polanga biodiesel/diesel blends

2020 ◽  
pp. 095965182096530
Author(s):  
Abhishek Sharma ◽  
Yashvir Singh ◽  
Avdhesh Tyagi ◽  
Nishant Kumar Singh ◽  
Amneesh Singla
Keyword(s):  
Response Surface Methodology ◽  
Diesel Engine ◽  
Response Surface ◽  
Fossil Fuels ◽  
Fuel Injection ◽  
Injection Pressure ◽  
Biodiesel Fuel ◽  
Injection Timing ◽  
Compression Ignition Engine ◽  
Performance And Emission

The exhaustive and irresponsible use of fossil fuels has created numerous public and environmental health issues in the past few decades. To address this issue, this work has investigated the use of polanga ( Calophyllum inophyllum) biodiesel/diesel blends in a diesel engine. This study focuses primarily on the optimization of performance and emission characteristics of a diesel engine fuelled with polanga-based biodiesel blends. The engine input factors were also investigated for desired optimal thermal performance. In this study, four input parameters, namely, engine loads, blends of polanga-based biodiesel, fuel injection pressure, and fuel injection timing were chosen for analysis. The corresponding engine output responses, namely, brake thermal efficiency, CO, NOx, and smoke emissions, are selected for their optimization by Taguchi method and response surface methodology. The results show that the best setting of above-mentioned input factors is reported at 44% engine load, 13% mixing of polanga biodiesel with diesel, 180 bar injection pressure of fuel, and 21.5 °bTDC injection timing of fuel. The comparison between results obtained by the optimization process and experimental results showed that the deviations were always found to be within the acceptable range of errors.

scholarly journals Effect of Intake Air Temperature and Premixed Ratio on Combustion and Exhaust Emissions in a Partial HCCI-DI Diesel Engine

2021 ◽  
Vol 13 (15) ◽  
pp. 8593
Author(s):  
Yew Heng Teoh ◽  
Hishammudin Afifi Huspi ◽  
Heoy Geok How ◽  
Farooq Sher ◽  
Zia Ud Din ◽  
...  
Keyword(s):  
Air Temperature ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Fuel Injection ◽  
Fuel Efficiency ◽  
Combustion Method ◽  
Compression Ignition ◽  
Nitric Oxides ◽  
Oxides Of Nitrogen ◽  
Compression Ignition Engine

Homogeneous charge compression ignition (HCCI) is considered an advanced combustion method for internal combustion engines that offers simultaneous reductions in oxides of nitrogen (NOx) emissions and increased fuel efficiency. The present study examines the influence of intake air temperature (IAT) and premixed diesel fuel on fuel self-ignition characteristics in a light-duty compression ignition engine. Partial HCCI was achieved by port injection of the diesel fuel through air-assisted injection while sustaining direct diesel fuel injection into the cylinder for initiating combustion. The self-ignition of diesel fuel under such a set-up was studied with variations in premixed ratios (0–0.60) and inlet temperatures (40–100 °C) under a constant 1600 rpm engine speed with 20 Nm load. Variations in performance, emissions and combustion characteristics with premixed fuel and inlet air heating were analysed in comparison with those recorded without. Heat release rate profiles determined from recorded in-cylinder pressure depicted evident multiple-stage ignitions (up to three-stage ignition in several cases) in this study. Compared with the premixed ratio, the inlet air temperature had a greater effect on low-temperature reaction and HCCI combustion timing. Nonetheless, an increase in the premixed ratio was found to be influential in reducing nitric oxides emissions.

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