This study was carried out to investigate the micro and chemical structure of particulate matter and nitrogen oxide from motor vehicle exhaust fumes. In this context, particulate matter microstructure was determined with the help of scanning electron microscope; elements such as C, O, N, F, Na, Mg, Br, Al, Si, Hg, S, Pb, Cl, Cd, K, Ca, Ba, Ti, V, Mn, Fe, Ni, V and Zn which constitute the source of pollution were determined by energy dispersive spectrometer; nitrogen oxide compounds were determined with X-ray diffraction spectrometer; and photonic properties were determined by means of photoluminescence spectrophotometer. The data obtained in this study provide important source information to understand the effects of exhaust fume on environmental pollution.
{"title":"Microstructure and chemical analysis of NOx and particle emissions of diesel engines","authors":"B. Güney, Ali Öz","doi":"10.18245/ijaet.730585","DOIUrl":"https://doi.org/10.18245/ijaet.730585","url":null,"abstract":"This study was carried out to investigate the micro and chemical structure of particulate matter and nitrogen oxide from motor vehicle exhaust fumes. In this context, particulate matter microstructure was determined with the help of scanning electron microscope; elements such as C, O, N, F, Na, Mg, Br, Al, Si, Hg, S, Pb, Cl, Cd, K, Ca, Ba, Ti, V, Mn, Fe, Ni, V and Zn which constitute the source of pollution were determined by energy dispersive spectrometer; nitrogen oxide compounds were determined with X-ray diffraction spectrometer; and photonic properties were determined by means of photoluminescence spectrophotometer. The data obtained in this study provide important source information to understand the effects of exhaust fume on environmental pollution.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90233868","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}
Permanent magnet synchronous motors (PMSM) are highly preferred in electric vehicles due to their high efficiency, good torque-speed characteristics, simple structure and long life. In this paper, the simulation study of direct torque controlled PMSM for electric vehicles was performed in MATLAB by direct torque control (DTC) method using different speed control and speed estimation methods, because output parameters of DTC method such as torque and current, have high ripple, and this ripple should be reduced for electric vehicle. Due to the simple structure of the DTC and its low dependence on the system parameters, it is widely used in alternative current motors. When DTC is used in PMSM drive, it is known that although it has fast dynamic response when it is compared to other vector control methods, the ripple in the torque and flux increases. In this study, direct torque controlled PMSM is tried to be minimized by using different speed control methods and speed estimation methods. For this purpose, proportional-integral (PI), fuzzy logic and sliding mode speed controller are used as speed controllers and their performances are compared. In addition, speed sensor less direct torque control of PMSM was performed by using sliding mode observer and model reference adaptive system (MRAS) observer. As a result of the simulation studies, it was found that sliding mode speed control method provides less ripples in the torque, better speed control and less energy consumption. Furthermore, as a speed observer, the sliding observer gives better results in speed estimation and provides less energy consumption.
{"title":"Direct torque control of permanent magnet synchronous motor for electric vehicles","authors":"Barış Çavuş, M. Aktas","doi":"10.18245/ijaet.633252","DOIUrl":"https://doi.org/10.18245/ijaet.633252","url":null,"abstract":"Permanent magnet synchronous motors (PMSM) are highly preferred in electric vehicles due to their high efficiency, good torque-speed characteristics, simple structure and long life. In this paper, the simulation study of direct torque controlled PMSM for electric vehicles was performed in MATLAB by direct torque control (DTC) method using different speed control and speed estimation methods, because output parameters of DTC method such as torque and current, have high ripple, and this ripple should be reduced for electric vehicle. Due to the simple structure of the DTC and its low dependence on the system parameters, it is widely used in alternative current motors. When DTC is used in PMSM drive, it is known that although it has fast dynamic response when it is compared to other vector control methods, the ripple in the torque and flux increases. In this study, direct torque controlled PMSM is tried to be minimized by using different speed control methods and speed estimation methods. For this purpose, proportional-integral (PI), fuzzy logic and sliding mode speed controller are used as speed controllers and their performances are compared. In addition, speed sensor less direct torque control of PMSM was performed by using sliding mode observer and model reference adaptive system (MRAS) observer. As a result of the simulation studies, it was found that sliding mode speed control method provides less ripples in the torque, better speed control and less energy consumption. Furthermore, as a speed observer, the sliding observer gives better results in speed estimation and provides less energy consumption.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74341330","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 current study, exhaust emission, vibration and noise features of diesel engine with addition of metallic based nanoparticles into diesel fuels were investigated experimentally. Various nanoparticles called as silver (II) nitrate (AgNO3), manganese (II) nitrate hydrate (Mn(NO3)2. xH20) and nickel(II) nitrate hexahydrate (Ni(NO3)2.6H2O) were used as an additive to diesel fuel at 25 ppm and 50 ppm dosing level so as to obtain six different fuel samples. Diesel engine with air-cooled and a single cylinder were utilized for engine tests altering engine speed from 1200 to 2800 rpm at the intervals of 400 rpm. The results demonstrated that of the nanoparticle addition did not remarkably affect the physicochemical features of the diesel test blends. But, the addition of nanoparticles slightly raised viscosity, cetane number and the heating value of test fuels especially, at the higher nanoparticle concentrations. In all experiments, with nanoparticle added blend fuels, CO, HC, NOx emission values and brake specific fuel consumption (BSFC) declined in parallel with the increase in nanoparticle concentration. In addition, it was shown that the Sound Pressure Level (SPL) and vibration characteristics of the engine block also decreased with increasing nanoparticle concentration of test fuels. As a result, AgNO3 addition to diesel fuel has an effective role in both reducing emission and vibration values and reducing BSFC values.
{"title":"Promotional effect of metal based nanoparticles on emission and vibration analysis of diesel engine","authors":"A. Yaşar, A. Keski̇n, Erdi Tosun, Safak Yildizhan","doi":"10.18245/IJAET.730092","DOIUrl":"https://doi.org/10.18245/IJAET.730092","url":null,"abstract":"In current study, exhaust emission, vibration and noise features of diesel engine with addition of metallic based nanoparticles into diesel fuels were investigated experimentally. Various nanoparticles called as silver (II) nitrate (AgNO3), manganese (II) nitrate hydrate (Mn(NO3)2. xH20) and nickel(II) nitrate hexahydrate (Ni(NO3)2.6H2O) were used as an additive to diesel fuel at 25 ppm and 50 ppm dosing level so as to obtain six different fuel samples. Diesel engine with air-cooled and a single cylinder were utilized for engine tests altering engine speed from 1200 to 2800 rpm at the intervals of 400 rpm. The results demonstrated that of the nanoparticle addition did not remarkably affect the physicochemical features of the diesel test blends. But, the addition of nanoparticles slightly raised viscosity, cetane number and the heating value of test fuels especially, at the higher nanoparticle concentrations. In all experiments, with nanoparticle added blend fuels, CO, HC, NOx emission values and brake specific fuel consumption (BSFC) declined in parallel with the increase in nanoparticle concentration. In addition, it was shown that the Sound Pressure Level (SPL) and vibration characteristics of the engine block also decreased with increasing nanoparticle concentration of test fuels. As a result, AgNO3 addition to diesel fuel has an effective role in both reducing emission and vibration values and reducing BSFC values.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"44 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91435097","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 paper focuses on determining of windshield inclination angle to aerodynamic drag coefficient for a 1/64 scaled bus model by Computational Fluid Dynamics (CFD) method. The bus models were designed by using SolidWorks program in 4 different windshield inclination angle (α=0˚, α=15˚, α=30˚, α=45˚). Flow analysis were performed at 15 m/s, 20 m/s, 25 m/s and 30 m/s free flow velocities and between the range of 173000-346000 Reynolds numbers in Fluent® program. To provide geometric similarity 1/64 scaled licensed model bus was used in order to obtain drawing datas. The blockage rate was 3.39% for the kinematic similarity. Reynolds number independence was used to ensure dynamic similarity in study. The effect of windshield inclination angle to drag coefficient was determined by CFD method. The aerodynamic drag coefficients (CD) of the bus models were determined as 0.759 for model 1, 0.731 for model 2, 0.683 for model 3 and 0.623 for model 4. There are 17.92%, 14.84% and 8.76% drag reduction in model 4 which has α=45˚ windshield inclination angle when compared model 1 (α=0˚), model 2 (α=15˚) and model 3 (α=30˚) respectively. 0.4% drag reduction was obtained by increasing every 1 degree of windshield angle. The windshield inclination angle considerably affects drag forces on buses. The distribution of total drag was determined as pressure-friction based. The flow visualizations were obtained and flow structure around of bus models was detected.
{"title":"The Determination Of Effect Of Windshield Inclination Angle To Drag Coefficient Of A Bus Model By Cfd Method","authors":"Cihan Bayindirli, M. Çelik","doi":"10.18245/IJAET.723755","DOIUrl":"https://doi.org/10.18245/IJAET.723755","url":null,"abstract":"This paper focuses on determining of windshield inclination angle to aerodynamic drag coefficient for a 1/64 scaled bus model by Computational Fluid Dynamics (CFD) method. The bus models were designed by using SolidWorks program in 4 different windshield inclination angle (α=0˚, α=15˚, α=30˚, α=45˚). Flow analysis were performed at 15 m/s, 20 m/s, 25 m/s and 30 m/s free flow velocities and between the range of 173000-346000 Reynolds numbers in Fluent® program. To provide geometric similarity 1/64 scaled licensed model bus was used in order to obtain drawing datas. The blockage rate was 3.39% for the kinematic similarity. Reynolds number independence was used to ensure dynamic similarity in study. The effect of windshield inclination angle to drag coefficient was determined by CFD method. The aerodynamic drag coefficients (CD) of the bus models were determined as 0.759 for model 1, 0.731 for model 2, 0.683 for model 3 and 0.623 for model 4. There are 17.92%, 14.84% and 8.76% drag reduction in model 4 which has α=45˚ windshield inclination angle when compared model 1 (α=0˚), model 2 (α=15˚) and model 3 (α=30˚) respectively. 0.4% drag reduction was obtained by increasing every 1 degree of windshield angle. The windshield inclination angle considerably affects drag forces on buses. The distribution of total drag was determined as pressure-friction based. The flow visualizations were obtained and flow structure around of bus models was detected.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78914839","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 : 2020-04-01DOI: 10.18052/www.scipress.com/ijet.18.8
U. Mark
Several factors contribute to the development of structure and properties of aluminiumalloy castings. This study investigated the singular effect of cooling rate on the as-cast structure andmechanical properties of an aluminum-silicon eutectic alloy, keeping other factors such as pouringtemperature, melt treatments, physical and thermal properties of the mould, and alloy compositionconstant. The rate of cooling was varied by employing different casting section sizes, based on thevariation of rate of heat extraction given by solidification time as predicted by the Chvorinov’s rule.Four test bars of section sizes 10, 20, 30, and 40 mm respectively were cast in sand mould using thesame gating system. Spectrometric analysis of the alloy formulated revealed that it could be specifiedapproximately as Al-12.8Si-1.0Cu alloy. The study showed that as section size decreased from 40mm to 10 mm; the solidification time reduced (i.e. the cooling rate increased), the microstructure gotfiner, the silicon flakes became more uniformly distributed, and the mechanical properties generallyimproved. The tensile strength, ductility, and hardness all increased in the order of decreasing sectionsize, i.e. increasing cooling rate. The mechanical properties were found to be linearly correlated withsection size or cooling rate. Whereas the elongations were lower than values for pure aluminium, thestrength and hardness were significantly higher than values for the pure metal. It is concluded thatthe cooling rate modifies the microstructure and improves the mechanical properties of as-cast Al–Sieutectic alloys
{"title":"Effect of Section Size as a Measure of Cooling Rate on the Solidified Microstructure and Mechanical Properties of Sand-Cast Al-Si Eutectic Alloy","authors":"U. Mark","doi":"10.18052/www.scipress.com/ijet.18.8","DOIUrl":"https://doi.org/10.18052/www.scipress.com/ijet.18.8","url":null,"abstract":"Several factors contribute to the development of structure and properties of aluminiumalloy castings. This study investigated the singular effect of cooling rate on the as-cast structure andmechanical properties of an aluminum-silicon eutectic alloy, keeping other factors such as pouringtemperature, melt treatments, physical and thermal properties of the mould, and alloy compositionconstant. The rate of cooling was varied by employing different casting section sizes, based on thevariation of rate of heat extraction given by solidification time as predicted by the Chvorinov’s rule.Four test bars of section sizes 10, 20, 30, and 40 mm respectively were cast in sand mould using thesame gating system. Spectrometric analysis of the alloy formulated revealed that it could be specifiedapproximately as Al-12.8Si-1.0Cu alloy. The study showed that as section size decreased from 40mm to 10 mm; the solidification time reduced (i.e. the cooling rate increased), the microstructure gotfiner, the silicon flakes became more uniformly distributed, and the mechanical properties generallyimproved. The tensile strength, ductility, and hardness all increased in the order of decreasing sectionsize, i.e. increasing cooling rate. The mechanical properties were found to be linearly correlated withsection size or cooling rate. Whereas the elongations were lower than values for pure aluminium, thestrength and hardness were significantly higher than values for the pure metal. It is concluded thatthe cooling rate modifies the microstructure and improves the mechanical properties of as-cast Al–Sieutectic alloys","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86485250","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}
S. Muthusamy, Shanmuga Sundaram Nallathambi, R. Ramasamy
Diesel engines are deliberately known for environmental pollution caused by exhaust emissions and are liable for many health issues further more. Emissions of diesel exhaust might lead to cancer, irritate the eyes, affects the nose, throat and lungs. Biodiesel is an eco-friendly and typical alternative fuel which is produced from vegetable oils through transesterification technique. Biodiesel has its own several advantages than the conventional diesel says decreased in carbon monoxide (CO), unburnt hydrocarbon (HC) and particle matter (PM) emissions, and having fuel properties which are similar to conventional diesel for its easier use in diesel engines. The outcomes demonstrated that the production of lesser CO and HC emission using biodiesel. Nevertheless, a minor increment in NOx emission was noticed for mahua oil methyl ester blends. Brake Specific Fuel Consumption (BSFC) for methyl ester blends was raised as compared to diesel. The combustion analysis exhibited a significant rise in combustion pressure and heat release rate with smaller ignition delay and extended combustion period. From the investigation, it could be said that the effects of mahua oil methyl esters and its blends on diesel engine when compared to conventional diesel ultimately minimizes the health effects of biodiesel exhaust exposure.
{"title":"Investigation on effects of the exhaust emission characteristics of diesel engine fuelled with mahua oil methyl esters and its blends with diesel","authors":"S. Muthusamy, Shanmuga Sundaram Nallathambi, R. Ramasamy","doi":"10.18245/ijaet.592218","DOIUrl":"https://doi.org/10.18245/ijaet.592218","url":null,"abstract":"Diesel engines are deliberately known for environmental pollution caused by exhaust emissions and are liable for many health issues further more. Emissions of diesel exhaust might lead to cancer, irritate the eyes, affects the nose, throat and lungs. Biodiesel is an eco-friendly and typical alternative fuel which is produced from vegetable oils through transesterification technique. Biodiesel has its own several advantages than the conventional diesel says decreased in carbon monoxide (CO), unburnt hydrocarbon (HC) and particle matter (PM) emissions, and having fuel properties which are similar to conventional diesel for its easier use in diesel engines. The outcomes demonstrated that the production of lesser CO and HC emission using biodiesel. Nevertheless, a minor increment in NOx emission was noticed for mahua oil methyl ester blends. Brake Specific Fuel Consumption (BSFC) for methyl ester blends was raised as compared to diesel. The combustion analysis exhibited a significant rise in combustion pressure and heat release rate with smaller ignition delay and extended combustion period. From the investigation, it could be said that the effects of mahua oil methyl esters and its blends on diesel engine when compared to conventional diesel ultimately minimizes the health effects of biodiesel exhaust exposure.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"8 1","pages":"20-28"},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88176061","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}
Homegeneous charge compression ignition (HCCI) combustion can achieve very low NOx and soot emissions but knocking and misfiring restrict the operating range of this kind of engines. In this work, n-butanol which has low reactivity and high volatility blended with n-heptane that choosen as reference fuel in this study with various rates (25 vol% and 50 vol%). The experiments performed at various engine speeds (800-1800) and lambda (λ=1.6-2.95) at full load and 60 oC inlet air temperature. the parameters such as in-cylinder pressure, heat release rate, CA10, ringing intensity, thermal efficiency, brake torque, power output, specific fuel consumption, and HC and CO emissions were determined. The results showed that both in-cylinder pressure and heat release rate decreased with increasing lambda. Increasing amount of n-butanol in the charge mixture resulted a decrease both in-cylinder pressure and heat release rate. n-butanol also provided retarded combustion phasing and increased CA10. Ringing intensity decreased with increasing both lambda and n-butanol content in the mixture. Thermal efficiency increased with n-butanol. HC and CO emissions increased with increasing lambda. HC and CO emissions increased with increasing amount of n-butanol in the charge mixture. Operating range of HCCI engine was expanded with n-butanol in both knocking and misfiring zones.
{"title":"Combustion, performance and emission caracteristics of a HCCI engine fuelled with n-butanol/n-heptane blends","authors":"Bilal Aydoğan, A. Calam","doi":"10.18245/ijaet.593811","DOIUrl":"https://doi.org/10.18245/ijaet.593811","url":null,"abstract":"Homegeneous charge compression ignition (HCCI) combustion can achieve very low NOx and soot emissions but knocking and misfiring restrict the operating range of this kind of engines. In this work, n-butanol which has low reactivity and high volatility blended with n-heptane that choosen as reference fuel in this study with various rates (25 vol% and 50 vol%). The experiments performed at various engine speeds (800-1800) and lambda (λ=1.6-2.95) at full load and 60 oC inlet air temperature. the parameters such as in-cylinder pressure, heat release rate, CA10, ringing intensity, thermal efficiency, brake torque, power output, specific fuel consumption, and HC and CO emissions were determined. The results showed that both in-cylinder pressure and heat release rate decreased with increasing lambda. Increasing amount of n-butanol in the charge mixture resulted a decrease both in-cylinder pressure and heat release rate. n-butanol also provided retarded combustion phasing and increased CA10. Ringing intensity decreased with increasing both lambda and n-butanol content in the mixture. Thermal efficiency increased with n-butanol. HC and CO emissions increased with increasing lambda. HC and CO emissions increased with increasing amount of n-butanol in the charge mixture. Operating range of HCCI engine was expanded with n-butanol in both knocking and misfiring zones.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"112 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80765799","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 automotive industry is changing due to automation, e-mobility, connectivity and shared mobility. For realization of automated driving systems, a high degree of safety and reliability is required. In today's vehicles a driver serves as a fallback for control, mechanical and energetic levels. Automated driving is a new market and requires fail-operational subsystems and components enabling the highest required safety level. One possibility to fulfill these requirements is designing a redundant system. Since such a design is not always possible and optimal in a vehicle due to the cost, size and weight factors, new system architectures are needed. A fail-operational electrical powertrain (power net, electric machine with inverter and battery) is a main prerequisite for introducing automated driving. This paper presents the concepts for developing fail-operational powertrain solution for automated driving.
{"title":"Dimensioning of fail-operational powertrain for automated driving","authors":"A. Kilic","doi":"10.18245/ijaet.669170","DOIUrl":"https://doi.org/10.18245/ijaet.669170","url":null,"abstract":"The automotive industry is changing due to automation, e-mobility, connectivity and shared mobility. For realization of automated driving systems, a high degree of safety and reliability is required. In today's vehicles a driver serves as a fallback for control, mechanical and energetic levels. Automated driving is a new market and requires fail-operational subsystems and components enabling the highest required safety level. One possibility to fulfill these requirements is designing a redundant system. Since such a design is not always possible and optimal in a vehicle due to the cost, size and weight factors, new system architectures are needed. A fail-operational electrical powertrain (power net, electric machine with inverter and battery) is a main prerequisite for introducing automated driving. This paper presents the concepts for developing fail-operational powertrain solution for automated driving.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"6 1","pages":"52-57"},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89079455","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}
Road noise is expected to become even more important in the vehicle product development cycle due to electrification and challenging lightweight/emission targets. In this study, a topology optimization algorithm is applied to determine the damping pad layout on the roof and floor panels of a Body-in-White (BIW), being the dominant contributors on road noise, vibration and harshness (NVH) performance of an automotive. Optimization algorithm yields the prescribed % of the surface area of these panels where the damping pad should be distributed set by the automotive Original Equipment Manufacturers (OEMs). The objective function is the minimization of the overall acceleration of these panels for the frequencies up to 200 Hz, while the weight of the BIW is considered as the optimization constraint. The results of the optimization are compared with the road NVH performance of panels with full damping and no damping. The optimization results indicate that by using 25% of the damping pad on the roof and floor panels improve the vibration performance especially in the frequency range of 80 Hz to 150 Hz significantly compared to bare BIW panels. Besides, the performance of the 25% damping is almost same as the application of full damping pad for frequencies between 90 Hz to 110 Hz. The results show that the methodology is able to address the trade-offs between road NVH and weight targets effectively.
{"title":"Application and Optimization of Damping Pad to a Body-in-White of a Vehicle for Improved Road Noise, Vibration and Harshness Performance","authors":"P. Şendur","doi":"10.18245/ijaet.650551","DOIUrl":"https://doi.org/10.18245/ijaet.650551","url":null,"abstract":"Road noise is expected to become even more important in the vehicle product development cycle due to electrification and challenging lightweight/emission targets. In this study, a topology optimization algorithm is applied to determine the damping pad layout on the roof and floor panels of a Body-in-White (BIW), being the dominant contributors on road noise, vibration and harshness (NVH) performance of an automotive. Optimization algorithm yields the prescribed % of the surface area of these panels where the damping pad should be distributed set by the automotive Original Equipment Manufacturers (OEMs). The objective function is the minimization of the overall acceleration of these panels for the frequencies up to 200 Hz, while the weight of the BIW is considered as the optimization constraint. The results of the optimization are compared with the road NVH performance of panels with full damping and no damping. The optimization results indicate that by using 25% of the damping pad on the roof and floor panels improve the vibration performance especially in the frequency range of 80 Hz to 150 Hz significantly compared to bare BIW panels. Besides, the performance of the 25% damping is almost same as the application of full damping pad for frequencies between 90 Hz to 110 Hz. The results show that the methodology is able to address the trade-offs between road NVH and weight targets effectively.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"104 1","pages":"42-51"},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76880554","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 brake discs of the new generation vehicles operate with very high speed and tough braking conditions. Therefore, high performance in braking is essential in terms of human and vehicle safety. In vehicles, the braking performance criterion is to control the speed of the vehicle safely without causing a mechanical failure. During a braking process in a moving vehicle, an excessive abrasion occurs. The aim of this study was to investigate the performance of the brake disc coated with Cr2O3-2%TiO2 (Metco106F) composite powder by using the plasma coating method to increase the abrasion resistance of automobile brake disc. The braking test was performed according to the SAEJ2430 braking test standard. The microstructure, hardness, wear and braking performance characteristics of the coating were investigated. Our results showed that the coated disc exhibited better wear resistance than the uncoated disc under the different wear mechanisms at high temperatures. The obtained coefficient of friction revealed that the coated disc showed better braking performance.
{"title":"Investigation of the effect of Cr2O3-2 % TiO2 coating on braking performance","authors":"I. Mutlu, B. Güney, İbrahim Erkurt","doi":"10.18245/ijaet.592144","DOIUrl":"https://doi.org/10.18245/ijaet.592144","url":null,"abstract":"The brake discs of the new generation vehicles operate with very high speed and tough braking conditions. Therefore, high performance in braking is essential in terms of human and vehicle safety. In vehicles, the braking performance criterion is to control the speed of the vehicle safely without causing a mechanical failure. During a braking process in a moving vehicle, an excessive abrasion occurs. The aim of this study was to investigate the performance of the brake disc coated with Cr2O3-2%TiO2 (Metco106F) composite powder by using the plasma coating method to increase the abrasion resistance of automobile brake disc. The braking test was performed according to the SAEJ2430 braking test standard. The microstructure, hardness, wear and braking performance characteristics of the coating were investigated. Our results showed that the coated disc exhibited better wear resistance than the uncoated disc under the different wear mechanisms at high temperatures. The obtained coefficient of friction revealed that the coated disc showed better braking performance.","PeriodicalId":13841,"journal":{"name":"International Journal of Automotive Engineering and Technologies","volume":"13 1","pages":"29-41"},"PeriodicalIF":0.0,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79527031","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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