Pub Date : 2020-12-01DOI: 10.18052/www.scipress.com/ijet.19.33
J. O. Azubuike, O. Nwafor, J. O. Igbokwe, D. O. Isiohia
Engine knock is a critical phenomenon engine designers strive to minimize in the world today. Before now, this has made tetra ethyl lead (TEL) an option for minimizing knock. The basic essence of tetra ethyl lead is to enhance octane rating of petrol which is a vital factor to knocking ability. However, the health and environmental challenges associated with the use of tetra ethyl lead propel the desire to replace it with a better environmental and health friendly substance that will at the same time boost octane rating and give a smoother engine operation. Hence, ethanol was considered in this work at a constant speed test of 2000 rpm and compared to leaded petrol as baseline petrol. BSFC of 0.703 kgkWhr was obtained with 20/80 compared to 0.709 kgkWhr obtained with 0/100 as baseline fuel. Maximum brake power of 0.74 kW occurred at a bmep of 1.235 bar with 15/85 ethanol/petrol. Similarly, maximum brake thermal efficiency of 13.44% was obtained with 20/80 ethanol/petrol compared to 11.49% obtained with leaded petrol as baseline petrol. It is indicated that maximum power output, low BSFC and low petrol consumption was obtained with 20/80 ethanol/petrol blend. It is convincible that 20/80 blend ratio offer good alternative to other antiknock agents which are associated with harmful consequences to man and environment. The implication of this work is that a definite blend for optimum performance and more environmentally friendly antiknock agent is established.
{"title":"Evaluation of Spark Ignition Engine Performance Using Ethanol as Doping Agent on Constant Speed Test","authors":"J. O. Azubuike, O. Nwafor, J. O. Igbokwe, D. O. Isiohia","doi":"10.18052/www.scipress.com/ijet.19.33","DOIUrl":"https://doi.org/10.18052/www.scipress.com/ijet.19.33","url":null,"abstract":"Engine knock is a critical phenomenon engine designers strive to minimize in the world today. Before now, this has made tetra ethyl lead (TEL) an option for minimizing knock. The basic essence of tetra ethyl lead is to enhance octane rating of petrol which is a vital factor to knocking ability. However, the health and environmental challenges associated with the use of tetra ethyl lead propel the desire to replace it with a better environmental and health friendly substance that will at the same time boost octane rating and give a smoother engine operation. Hence, ethanol was considered in this work at a constant speed test of 2000 rpm and compared to leaded petrol as baseline petrol. BSFC of 0.703 kgkWhr was obtained with 20/80 compared to 0.709 kgkWhr obtained with 0/100 as baseline fuel. Maximum brake power of 0.74 kW occurred at a bmep of 1.235 bar with 15/85 ethanol/petrol. Similarly, maximum brake thermal efficiency of 13.44% was obtained with 20/80 ethanol/petrol compared to 11.49% obtained with leaded petrol as baseline petrol. It is indicated that maximum power output, low BSFC and low petrol consumption was obtained with 20/80 ethanol/petrol blend. It is convincible that 20/80 blend ratio offer good alternative to other antiknock agents which are associated with harmful consequences to man and environment. The implication of this work is that a definite blend for optimum performance and more environmentally friendly antiknock agent is established.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"395 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75165058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-01DOI: 10.18052/www.scipress.com/ijet.19.11
K. Patil, B. K. Mishra
In future infrared photodetectors, single-walled carbon nanotubes (SWCNTs) are considered as potential candidates due to their band gap, high absorption coefficient (104 - 105 cm −1), high charge carrier mobility and ease of processability. The SWCNT based Field Effect Transistors (CNFETs) are being seriously considered for applications in optoelectronics. In the proposed work optically controlled back gated CNFET is modeled in Sentaurus TCAD to observe the impact of high dielectric oxides on its photoabsorption. The model is based on analytical approximations and parameters extracted from quantum mechanical simulations of the device and depending on the nanotube diameter and the different gate oxide materials. A small deviation in SWCNT chirality shows significant change (more than 50 %) in channel current. Transfer characteristics of the device are analyzed under dark and illuminated conditions. CNFET integrated with HfO2 dielectrics exhibits superior performance with a significant rise in photocurrent current. Precise two dimensional TCAD simulation results and visual figures affirm that the ON state performance of CNFET has significant dependency on the dielectric strength as well as width of the gate oxide and its application in enhancing the performance of carbon nanotube based infrared photo detectors.
{"title":"Dielectric Dependent Absorption Characteristics in CNFET Infrared Phototransistor","authors":"K. Patil, B. K. Mishra","doi":"10.18052/www.scipress.com/ijet.19.11","DOIUrl":"https://doi.org/10.18052/www.scipress.com/ijet.19.11","url":null,"abstract":"In future infrared photodetectors, single-walled carbon nanotubes (SWCNTs) are considered as potential candidates due to their band gap, high absorption coefficient (104 - 105 cm −1), high charge carrier mobility and ease of processability. The SWCNT based Field Effect Transistors (CNFETs) are being seriously considered for applications in optoelectronics. In the proposed work optically controlled back gated CNFET is modeled in Sentaurus TCAD to observe the impact of high dielectric oxides on its photoabsorption. The model is based on analytical approximations and parameters extracted from quantum mechanical simulations of the device and depending on the nanotube diameter and the different gate oxide materials. A small deviation in SWCNT chirality shows significant change (more than 50 %) in channel current. Transfer characteristics of the device are analyzed under dark and illuminated conditions. CNFET integrated with HfO2 dielectrics exhibits superior performance with a significant rise in photocurrent current. Precise two dimensional TCAD simulation results and visual figures affirm that the ON state performance of CNFET has significant dependency on the dielectric strength as well as width of the gate oxide and its application in enhancing the performance of carbon nanotube based infrared photo detectors.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78650595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aims to experimentally examine the effects of vehicle speed changes on the vertical resonance frequency of effective rolling radius variations for applying to TPMS (Tire Pressure Monitoring System). For this, the road tests have been conducted at constant vehicle speeds 30, 60, 90km/h for tire pressures 15, 20, 25, 30, 35psi. In these tests, the effective rolling radius changes have been measured. Test results show that the vehicle speed changes cause the resonance frequency to shift at same tire pressure. Therefore, this study shows that the changes in vertical resonance frequency resulting from vehicle speed changes may cause wrong tire pressure information to be taken by TPMS.
{"title":"Experimental study on Effects of Vehicle Speed Variations on Effective Rolling Radius According to The changes in Tire Pressure","authors":"Hakan Köylü","doi":"10.18245/IJAET.617966","DOIUrl":"https://doi.org/10.18245/IJAET.617966","url":null,"abstract":"This study aims to experimentally examine the effects of vehicle speed changes on the vertical resonance frequency of effective rolling radius variations for applying to TPMS (Tire Pressure Monitoring System). For this, the road tests have been conducted at constant vehicle speeds 30, 60, 90km/h for tire pressures 15, 20, 25, 30, 35psi. In these tests, the effective rolling radius changes have been measured. Test results show that the vehicle speed changes cause the resonance frequency to shift at same tire pressure. Therefore, this study shows that the changes in vertical resonance frequency resulting from vehicle speed changes may cause wrong tire pressure information to be taken by TPMS.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"1 1","pages":"130-137"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90189487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The creation and implementation of brackets have become highly significant in the quality and safety of manufacturing parking brake cables. Moreover, the ability to establish fatigue loads and their effects on the brackets in the vehicle route is now highly important in the design and development process. It is thus crucial to develop an accurate numerical model using computer aided engineering to establish patterns of fatigue during bracket manufacturing. The purpose of this research is to identify the importance of computer aided engineering in bracket optimization, for example in parking brake cables. The key objective of the research is to establish the level of strain exerted on a bracket during oscillation (fatigue) resulting from suspension movement of vehicles. Furthermore, it intends to lower the vehicle's weight and cost by replacing metal brackets with plastic ones.
{"title":"Fatigue behavior for design optimization of parking brake bracket connections","authors":"Serdar Dalfidan, H. Erol","doi":"10.18245/IJAET.674557","DOIUrl":"https://doi.org/10.18245/IJAET.674557","url":null,"abstract":"The creation and implementation of brackets have become highly significant in the quality and safety of manufacturing parking brake cables. Moreover, the ability to establish fatigue loads and their effects on the brackets in the vehicle route is now highly important in the design and development process. It is thus crucial to develop an accurate numerical model using computer aided engineering to establish patterns of fatigue during bracket manufacturing. The purpose of this research is to identify the importance of computer aided engineering in bracket optimization, for example in parking brake cables. The key objective of the research is to establish the level of strain exerted on a bracket during oscillation (fatigue) resulting from suspension movement of vehicles. Furthermore, it intends to lower the vehicle's weight and cost by replacing metal brackets with plastic ones.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"32 1","pages":"161-170"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80777264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to provide fuel saving and performance in gasoline/diesel automotive vehicles, and to increase the long range of the electric battery in electric vehicles, lightening studies in the weight of automotive vehicles are carried out by researchers at the automotive R&D (Research and Development) centers in the university and industry. The reducing of weight of automotive vehicles finds out some problems such as low crashworthiness and safety. These highlight problems bring something into the forefront the use of ultra-light honeycomb sandwich composites having high mechanical properties in the automotive industry. In addition, the mechanical properties of fiber-reinforced honeycomb sandwich composites can be further improved by limiting the formation of damages during impact by using nanotechnology. In this study, the usability of multi walled nanoparticles (MWCNTs) filled and unfilled GFR/Aluminum honeycomb sandwich composites instead of metal protection bars in the doors of automotive vehicles was investigated. It was found that 0.3%wt MWCNTs increased the average maximum bending loads, displacements and impact energy absorptions by about 2.1, 1.36 and 1.5 times respectively according to compared to unfilled GFR/Aluminum honeycomb sandwich composites. The slip-stick failure mechanism was observed at interfaces of unfilled GFR composite face sheets and aluminum honeycomb core. The delamination failures were found as dominant failure as result of poor adhesion for them. It was detected with microscope and SEM analysis that MWCNTs restricted the occurrence of failures during the bending load and impact. MWCNTs provided the fillet occurrence at interfaces by increasing the contact bonding areas. Plastic deformation was found as dominant failure for them. It is thought that the crashworthiness and safety can be improved by using MWCNTs filled GFR/aluminum honeycomb sandwich composites in car doors instead of metal protection bars.
{"title":"Investigation of the Usability of MWCNTs Filled GFR/Aluminum Honeycomb Sandwich Composites for Automotive Vehicles","authors":"M. Demirci","doi":"10.18245/IJAET.737204","DOIUrl":"https://doi.org/10.18245/IJAET.737204","url":null,"abstract":"In order to provide fuel saving and performance in gasoline/diesel automotive vehicles, and to increase the long range of the electric battery in electric vehicles, lightening studies in the weight of automotive vehicles are carried out by researchers at the automotive R&D (Research and Development) centers in the university and industry. The reducing of weight of automotive vehicles finds out some problems such as low crashworthiness and safety. These highlight problems bring something into the forefront the use of ultra-light honeycomb sandwich composites having high mechanical properties in the automotive industry. In addition, the mechanical properties of fiber-reinforced honeycomb sandwich composites can be further improved by limiting the formation of damages during impact by using nanotechnology. In this study, the usability of multi walled nanoparticles (MWCNTs) filled and unfilled GFR/Aluminum honeycomb sandwich composites instead of metal protection bars in the doors of automotive vehicles was investigated. It was found that 0.3%wt MWCNTs increased the average maximum bending loads, displacements and impact energy absorptions by about 2.1, 1.36 and 1.5 times respectively according to compared to unfilled GFR/Aluminum honeycomb sandwich composites. The slip-stick failure mechanism was observed at interfaces of unfilled GFR composite face sheets and aluminum honeycomb core. The delamination failures were found as dominant failure as result of poor adhesion for them. It was detected with microscope and SEM analysis that MWCNTs restricted the occurrence of failures during the bending load and impact. MWCNTs provided the fillet occurrence at interfaces by increasing the contact bonding areas. Plastic deformation was found as dominant failure for them. It is thought that the crashworthiness and safety can be improved by using MWCNTs filled GFR/aluminum honeycomb sandwich composites in car doors instead of metal protection bars.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"118 1","pages":"138-153"},"PeriodicalIF":0.0,"publicationDate":"2020-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79527580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The connecting rod is the intermediate component between the piston and the crankshaft, and its primary function is to move the up and down from the piston pin to the crankshaft converting the reciprocating motion into rotary motion of the piston and crankshaft. This study describes a numerical analysis of connecting rod for determining the critical stress regions. During the analysis of connecting rod, loads corresponding to different engine speeds were assumed to be statically applied, and their corresponding stress and deformation values were evaluated. The power and torque values of engine were utilized to be used as the load boundary conditions in static simulation model, other parameters those of used as input values were geometric dimensions of connecting rod and its material properties. Numerical analyses were performed for the connecting rod made of SS 304 material. A 3D CAD model was developed for the connecting rod through the SOLIDWORKS software, then drawn solid model was transferred to the ANSYS software with Workbench module. Von mises stress and deformation analyses were evaluated under the different engine speeds with indicating that connecting rod did not failure and fractured under the applied external loads.
{"title":"Stress and deformation analysis of a connecting rod by using ANSYS","authors":"M. Bulut, Ö. Cihan","doi":"10.18245/IJAET.680511","DOIUrl":"https://doi.org/10.18245/IJAET.680511","url":null,"abstract":"The connecting rod is the intermediate component between the piston and the crankshaft, and its primary function is to move the up and down from the piston pin to the crankshaft converting the reciprocating motion into rotary motion of the piston and crankshaft. This study describes a numerical analysis of connecting rod for determining the critical stress regions. During the analysis of connecting rod, loads corresponding to different engine speeds were assumed to be statically applied, and their corresponding stress and deformation values were evaluated. The power and torque values of engine were utilized to be used as the load boundary conditions in static simulation model, other parameters those of used as input values were geometric dimensions of connecting rod and its material properties. Numerical analyses were performed for the connecting rod made of SS 304 material. A 3D CAD model was developed for the connecting rod through the SOLIDWORKS software, then drawn solid model was transferred to the ANSYS software with Workbench module. Von mises stress and deformation analyses were evaluated under the different engine speeds with indicating that connecting rod did not failure and fractured under the applied external loads.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80256436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Biodiesel is an alternative fuel that can be produced from renewable sources such as vegetable and animal fats. It is available as fuel in diesel engines. Also, biodiesel fuel is a type of environmentally friendly fuel that is non-toxic, not perishable in nature. A single cylinder, four-stroke, air-cooled, direct-injection diesel engine was used in the study. In the engine is used as fuel of diesel fuel and 10%, COME (Canola Oil Methyl Ester) was added to diesel fuel. The piston rings between the engine parts are critical in term of leakage and lubrication. The fuel used affects engine performance and emissions as well as the surface structure of the piston rings. In this study, Antor 3LD510 diesel engine was run with 10% canola oil methyl ester blended fuel and the engine carried out subjected to long term 150 hours’ endurance test. The engine was operated at 1500 rpm and under part load. SEM (Scanning Electron Microscope) and EDX (Energy Dispersive Spectrometry) analysis of the first, second and third piston rings were performed. As a result, after the operation of the engine with both fuels, the Cr element was largely determined on the surface of the first piston ring and the structure was not disturbed. When the second piston ring surface distribution of COME10 fuel compared to diesel fuel is examined, it is seen that besides the wear elements, combustion and fuel chemistry in the engine are more effective on the surface. The surface of the third piston ring was found to be close to each other after the operating of engine.
{"title":"Effects on lubricating oil and piston rings of the different operating parameters in a DI diesel engine","authors":"I. Temizer, Ö. Cihan","doi":"10.18245/ijaet.680242","DOIUrl":"https://doi.org/10.18245/ijaet.680242","url":null,"abstract":"Biodiesel is an alternative fuel that can be produced from renewable sources such as vegetable and animal fats. It is available as fuel in diesel engines. Also, biodiesel fuel is a type of environmentally friendly fuel that is non-toxic, not perishable in nature. A single cylinder, four-stroke, air-cooled, direct-injection diesel engine was used in the study. In the engine is used as fuel of diesel fuel and 10%, COME (Canola Oil Methyl Ester) was added to diesel fuel. The piston rings between the engine parts are critical in term of leakage and lubrication. The fuel used affects engine performance and emissions as well as the surface structure of the piston rings. In this study, Antor 3LD510 diesel engine was run with 10% canola oil methyl ester blended fuel and the engine carried out subjected to long term 150 hours’ endurance test. The engine was operated at 1500 rpm and under part load. SEM (Scanning Electron Microscope) and EDX (Energy Dispersive Spectrometry) analysis of the first, second and third piston rings were performed. As a result, after the operation of the engine with both fuels, the Cr element was largely determined on the surface of the first piston ring and the structure was not disturbed. When the second piston ring surface distribution of COME10 fuel compared to diesel fuel is examined, it is seen that besides the wear elements, combustion and fuel chemistry in the engine are more effective on the surface. The surface of the third piston ring was found to be close to each other after the operating of engine.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78990863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Humans are living things that make mistakes. Failure of drivers while driving can cause life, cost, organ loss. Some accidents may remain traumatic in people's memory and adversely affect their future lives. Traffic rules have been developed to prevent such accidents. Traffic is formally organized in many jurisdictions, with marked lanes, junctions, intersections, interchanges, traffic signals, or signs. Rules of the road and driving etiquette are the general practices and procedures that road users are required to follow. Thanks to these guides placed on the roads, drivers can go on the road in harmony. Despite all these precautions, there are many traffic accidents caused by the driver's carelessness, sleeplessness and tiredness. In today's technology, it is possible to utilize methods of processing images from cameras located in the vehicle to minimize driver-induced accidents. In this study, a prototype system was established in order to use the technologies used in autonomous vehicles and to teach these technologies. Camera and computer are placed on a battery-powered vehicle. Using the OpenCV library, lane tracking is performed successfully using the Canny/Hough Estimation of Vanishing Points (CHEVP) method. The developed system is suitable for the use and development of image processing technologies that are used in autonomous vehicle technology. The system is tested in real-time on a designed runway. From the real-time experimental studies, high-performance results were obtained.
{"title":"Small size vehicle application with lane tracking capability via CHEVP algorithm","authors":"Abdulhamit Sevgi, Emel Soylu, R. Bayir","doi":"10.18245/ijaet.639025","DOIUrl":"https://doi.org/10.18245/ijaet.639025","url":null,"abstract":"Humans are living things that make mistakes. Failure of drivers while driving can cause life, cost, organ loss. Some accidents may remain traumatic in people's memory and adversely affect their future lives. Traffic rules have been developed to prevent such accidents. Traffic is formally organized in many jurisdictions, with marked lanes, junctions, intersections, interchanges, traffic signals, or signs. Rules of the road and driving etiquette are the general practices and procedures that road users are required to follow. Thanks to these guides placed on the roads, drivers can go on the road in harmony. Despite all these precautions, there are many traffic accidents caused by the driver's carelessness, sleeplessness and tiredness. In today's technology, it is possible to utilize methods of processing images from cameras located in the vehicle to minimize driver-induced accidents. In this study, a prototype system was established in order to use the technologies used in autonomous vehicles and to teach these technologies. Camera and computer are placed on a battery-powered vehicle. Using the OpenCV library, lane tracking is performed successfully using the Canny/Hough Estimation of Vanishing Points (CHEVP) method. The developed system is suitable for the use and development of image processing technologies that are used in autonomous vehicle technology. The system is tested in real-time on a designed runway. From the real-time experimental studies, high-performance results were obtained.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"129 14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87899574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this research is the investigation of using glycerol tert-butyl ethers as a bio-renewable fuel additive to diesel-biodiesel blend in a diesel engine. In this context, an experimental study was carried out to synthesize glycerol tert-butyl ethers and investigate the effect of glycerol ethers on diesel engine performance and emissions. Glycerol tert-butyl ethers were synthesized by the etherification reaction of glycerol with tert-butyl alcohol (TBA) in a high-pressure stainless steel batch reactor using Amberlyst-15 as solid acidic catalyst. Produced glycerol ethers were mixed by 2 vol.% with a biodiesel-diesel blend to investigate the glycerol ethers usage as a fuel additive in a diesel engine. Three test fuels were considered for the experiments: (i) diesel fuel, (ii) B20 (80 vol.% diesel + 20 vol.% corn oil biodiesel); (iii) BD+GTBEs (80 vol.% diesel + 18 vol.% corn oil biodiesel + 2 vol.% glycerol tert-butyl ethers). Some basic fuel properties of test fuels were determined prior to engine tests. Engine performance and emissions tests were performed on a single-cylinder research diesel engine at four brake power output. The results revealed that the addition of glycerol tert-butyl ethers in the fuel showed no significant effect on determined fuel properties and caused a decrease in engine performance and exhaust emissions except for CO emissions when compared to base diesel fuel. However, BD+GTBEs presented similar performance and emissions characteristics with B20, as a consequence, glycerol tert-butyl ethers have the possibility of being utilized as a bio-renewable fuel additive to diesel-biodiesel blends.
{"title":"Evaluation of glycerol tert-butyl ethers as renewable fuel additive","authors":"Abdulvahap Çakmak, H. Ozcan","doi":"10.18245/ijaet.655168","DOIUrl":"https://doi.org/10.18245/ijaet.655168","url":null,"abstract":"The aim of this research is the investigation of using glycerol tert-butyl ethers as a bio-renewable fuel additive to diesel-biodiesel blend in a diesel engine. In this context, an experimental study was carried out to synthesize glycerol tert-butyl ethers and investigate the effect of glycerol ethers on diesel engine performance and emissions. Glycerol tert-butyl ethers were synthesized by the etherification reaction of glycerol with tert-butyl alcohol (TBA) in a high-pressure stainless steel batch reactor using Amberlyst-15 as solid acidic catalyst. Produced glycerol ethers were mixed by 2 vol.% with a biodiesel-diesel blend to investigate the glycerol ethers usage as a fuel additive in a diesel engine. Three test fuels were considered for the experiments: (i) diesel fuel, (ii) B20 (80 vol.% diesel + 20 vol.% corn oil biodiesel); (iii) BD+GTBEs (80 vol.% diesel + 18 vol.% corn oil biodiesel + 2 vol.% glycerol tert-butyl ethers). Some basic fuel properties of test fuels were determined prior to engine tests. Engine performance and emissions tests were performed on a single-cylinder research diesel engine at four brake power output. The results revealed that the addition of glycerol tert-butyl ethers in the fuel showed no significant effect on determined fuel properties and caused a decrease in engine performance and exhaust emissions except for CO emissions when compared to base diesel fuel. However, BD+GTBEs presented similar performance and emissions characteristics with B20, as a consequence, glycerol tert-butyl ethers have the possibility of being utilized as a bio-renewable fuel additive to diesel-biodiesel blends.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"117 24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84287636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As a consequence of the emissions-cheating scandals and more strict emission regulations enforce researchers to reduce emissions out and find alternative fuels for SI engines. For this purpose, various spark plugs are available in the market with different electrode materials. However, they have not been tested together with different engine parameters. Hence, emissions out from a variable compression spark-ignited engine with different spark plugs and hydrogen enrichment were the scope of this study. The tests were conducted with a four-stroke, single-cylinder, naturally aspirated, variable compression ratio (VCR) engine. Two different compression ratios (CR) of 8.5:1 and 10:1 at maximum brake torque (MBT) spark timing applied to assess the effects of different spark plugs and hydrogen usage at different engine loads. Copper, iridium and platinum spark plugs were tested for each experiment condition. Also, hydrogen was added through the intake manifold with flow rates of 0, 2 and 4 l/min to enhance the combustion of the VCR engine. Carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx) and unburned hydrocarbons (UHC) emission values were measured in this study. According to test results, with iridium and platinum spark plug usage, hydrogen addition and higher CR, the engine emitted lower CO and UHC at all engine loads. However, a higher amount of CO2 was emitted because of increased completeness of the combustion and the amount of NOx emissions rose due to increment in-cylinder temperatures. These variances were more apparent with platinum spark plug usage compared to the iridium spark plug. As a result, the usage of iridium and platinum spark plugs were shown lower incomplete emissions products out, except NOx emissions.
{"title":"Reducing emissions of an SI engine by alternative spark plugs with hydrogen addition and variable compression ratio","authors":"O. Baş, M. Akar, H. Serin","doi":"10.18245/ijaet.706956","DOIUrl":"https://doi.org/10.18245/ijaet.706956","url":null,"abstract":"As a consequence of the emissions-cheating scandals and more strict emission regulations enforce researchers to reduce emissions out and find alternative fuels for SI engines. For this purpose, various spark plugs are available in the market with different electrode materials. However, they have not been tested together with different engine parameters. Hence, emissions out from a variable compression spark-ignited engine with different spark plugs and hydrogen enrichment were the scope of this study. The tests were conducted with a four-stroke, single-cylinder, naturally aspirated, variable compression ratio (VCR) engine. Two different compression ratios (CR) of 8.5:1 and 10:1 at maximum brake torque (MBT) spark timing applied to assess the effects of different spark plugs and hydrogen usage at different engine loads. Copper, iridium and platinum spark plugs were tested for each experiment condition. Also, hydrogen was added through the intake manifold with flow rates of 0, 2 and 4 l/min to enhance the combustion of the VCR engine. Carbon monoxide (CO), carbon dioxide (CO2), nitrogen oxides (NOx) and unburned hydrocarbons (UHC) emission values were measured in this study. According to test results, with iridium and platinum spark plug usage, hydrogen addition and higher CR, the engine emitted lower CO and UHC at all engine loads. However, a higher amount of CO2 was emitted because of increased completeness of the combustion and the amount of NOx emissions rose due to increment in-cylinder temperatures. These variances were more apparent with platinum spark plug usage compared to the iridium spark plug. As a result, the usage of iridium and platinum spark plugs were shown lower incomplete emissions products out, except NOx emissions.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76186888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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