Sathyarayana H. D., Kamasani Bujji Babu, Renukaraj Y. M., Ankit Shrivastava, Mahadevan B.
The intent of this paper is to propose a system to control the steering operation and hoist operation of the Dump truck through combination of electro hydraulic valves and priority valve housed in Integrated manifold block. Electro hydraulic control valve(EHCV), and Electronic controller unit (ECU) for steering and hoist operation of the dump truck. The orbitrol valve consists of load sensing line, when the Orbitrol valve sense an effort on the steering wheel by the operator, the load sensing line will give a feedback signal to the electro hydraulic valve, which will divert the pressurized hydraulic oil to the steering system for steering operation, else the hydraulic oil is available for hoist operation. The hoist operation is control through Electronic Controller Unit (ECU). If there is no signal from the controller for hoist operation the hydraulic oil will flow back to tank. The Electronic controller will energize the combination of solenoid operated valves, depending upon the input received from operator through the momentary switch (Raise Switch, Lower/Float Switch, Hold Switch) mounted inside the cabin, which will allow the flow of pressurized hydraulic oil to the hoist cylinder for body raise and lower operation through electro hydraulic control valve. The electronic controller memorizes the signal from momentary switch and energizes the solenoids as per the logic till the next input signal receive by controller.
{"title":"Design & Development of Electro Hydraulic Control Valve for Integration of Hoist and Steering System of a Dump Truck (35t)","authors":"Sathyarayana H. D., Kamasani Bujji Babu, Renukaraj Y. M., Ankit Shrivastava, Mahadevan B.","doi":"10.37285/ajmt.1.2.7","DOIUrl":"https://doi.org/10.37285/ajmt.1.2.7","url":null,"abstract":"The intent of this paper is to propose a system to control the steering operation and hoist operation of the Dump truck through combination of electro hydraulic valves and priority valve housed in Integrated manifold block. Electro hydraulic control valve(EHCV), and Electronic controller unit (ECU) for steering and hoist operation of the dump truck. The orbitrol valve consists of load sensing line, when the Orbitrol valve sense an effort on the steering wheel by the operator, the load sensing line will give a feedback signal to the electro hydraulic valve, which will divert the pressurized hydraulic oil to the steering system for steering operation, else the hydraulic oil is available for hoist operation. The hoist operation is control through Electronic Controller Unit (ECU). If there is no signal from the controller for hoist operation the hydraulic oil will flow back to tank. The Electronic controller will energize the combination of solenoid operated valves, depending upon the input received from operator through the momentary switch (Raise Switch, Lower/Float Switch, Hold Switch) mounted inside the cabin, which will allow the flow of pressurized hydraulic oil to the hoist cylinder for body raise and lower operation through electro hydraulic control valve. The electronic controller memorizes the signal from momentary switch and energizes the solenoids as per the logic till the next input signal receive by controller.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126970662","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 study focuses on heat transfer through an insulating material using various methods followed by adopting glass wool, calcium silicate and asbestos. Heat transfer is one of the important areas of engineering applications and it is growing day to day in various other fields such as automobile, industrial and power plants where the efficiency is dependent on temperature. One can easily understand the flow of heat and can solve and analyze the flow of heat in an unusual situation. Since the use of software is useful, one can easily understand the problem and can get results faster which is very helpful in today’s world. The research carried out is to explain briefly how the rate of heat transfer increases gradually up to some extent and the layers on it is observed as constant straight line. The cost of insulating material can be reduced and for assembling the part, the space can be minimized. The temperature distribution of cylindrical pipe is analyzed in this work. Three various insulating materials is used and solved by thermal resistance method and finite difference method using Taylor series approximation. The modeling and simulation of cylindrical pipe is obtained by the software known as Ansys Workbench 2021 R1 and the results are drawn.
{"title":"Analytical Modeling and Thermal Insulation of Insulating Material","authors":"Faizan A Shakh, R. S. Hosmath, P. P. Revankar","doi":"10.37285/ajmt.1.1.3","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.3","url":null,"abstract":"The study focuses on heat transfer through an insulating material using various methods followed by adopting glass wool, calcium silicate and asbestos. Heat transfer is one of the important areas of engineering applications and it is growing day to day in various other fields such as automobile, industrial and power plants where the efficiency is dependent on temperature. One can easily understand the flow of heat and can solve and analyze the flow of heat in an unusual situation. Since the use of software is useful, one can easily understand the problem and can get results faster which is very helpful in today’s world. The research carried out is to explain briefly how the rate of heat transfer increases gradually up to some extent and the layers on it is observed as constant straight line. The cost of insulating material can be reduced and for assembling the part, the space can be minimized. The temperature distribution of cylindrical pipe is analyzed in this work. Three various insulating materials is used and solved by thermal resistance method and finite difference method using Taylor series approximation. The modeling and simulation of cylindrical pipe is obtained by the software known as Ansys Workbench 2021 R1 and the results are drawn.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123391403","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}
{"title":"Foreword & Message","authors":"Dr. S. S. V. Ramakumar","doi":"10.37285/ajmt.1.1.0","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.0","url":null,"abstract":"","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123278411","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}
There have been extensive research works going on electric mobility but most of these work and the existing electric mobility systems are battery-based DC systems. In some applications of electric mobility like traction and advanced technologies like electromagnetic induction charging, AC fed systems are employed due to the innate qualities of AC power transmission. Almost all the electric mobility systems we use are AC induction or permanent magnet machines. The conventional electric mobility systems including traction having AC as their energy source use two-stage conversion i.e. A fixed AC is converted to a fixed or variable DC link using a rectifier and finally, an inverter provides a variable AC in terms of frequency and magnitude according to the control algorithm. The two-stage conversion has its pros and cons but Matrix Converter (MC) will be a suitable and efficient alternative for AC fed AC motor drives. In the case of traction and other electric mobility applications, the load torque demand plays a significant role. The predictive control technique provides a suitable solution for these kinds of special drive applications due to their selective parameter control ability. Implementation of predictive control using a matrix converter is more effective than the conventional inverter fed drives, owing to the increased viability of matrix converter switching configurations. This paper discusses the mathematical implementation and comparison of Predictive Current Control (PCC) and Predictive Torque Control (PTC) with and without weighing factor for AC fed electric mobility applications. The efficacy of both the model predictive control techniques in concern of execution time, steady-state, transient, and dynamic conditions are analysed and validated along with the influence of diverse control variables in the cost function.
{"title":"Model Predictive Control based Direct Matrix Converter fed Permanent Magnet Synchronous Machine drives for Traction and Electric Mobility Applications","authors":"B. Balaji, J. D. Anunciya","doi":"10.37285/ajmt.1.1.8","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.8","url":null,"abstract":"There have been extensive research works going on electric mobility but most of these work and the existing electric mobility systems are battery-based DC systems. In some applications of electric mobility like traction and advanced technologies like electromagnetic induction charging, AC fed systems are employed due to the innate qualities of AC power transmission. Almost all the electric mobility systems we use are AC induction or permanent magnet machines. The conventional electric mobility systems including traction having AC as their energy source use two-stage conversion i.e. A fixed AC is converted to a fixed or variable DC link using a rectifier and finally, an inverter provides a variable AC in terms of frequency and magnitude according to the control algorithm. The two-stage conversion has its pros and cons but Matrix Converter (MC) will be a suitable and efficient alternative for AC fed AC motor drives. In the case of traction and other electric mobility applications, the load torque demand plays a significant role. The predictive control technique provides a suitable solution for these kinds of special drive applications due to their selective parameter control ability. Implementation of predictive control using a matrix converter is more effective than the conventional inverter fed drives, owing to the increased viability of matrix converter switching configurations. This paper discusses the mathematical implementation and comparison of Predictive Current Control (PCC) and Predictive Torque Control (PTC) with and without weighing factor for AC fed electric mobility applications. The efficacy of both the model predictive control techniques in concern of execution time, steady-state, transient, and dynamic conditions are analysed and validated along with the influence of diverse control variables in the cost function.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126286346","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}
Crown wheel pinion is a prime member in transferring the power from transmission to wheel ends in automotive truck axles. Gear material is one of the deciding factors to estimate the fatigue life of the part. Higher the fatigue characteristics of the material better the fatigue performance of the part. In this case study, heavy truck axle with particular size having deep gear ratio is considered for material change from DIN 20MnCr5 to BS-EN 353, because its challenging to meet the life requirement in deeper gear ratios typically above 6. The basic material comparison conducted for metallurgical properties, jominy values, heat treatment properties, fatigue endurance limits, impact strength & fracture toughness. The analysis shows the EN 353 has 50% better impact strength, 35% better fracture toughness & 6.5% better endurance limit than that of 20MnCr5. The impact strength of EN 353 is 50J where as 20 MnCr5 is 25J, the fracture toughness of EN353 is 99.5 MPa√m & that of 20MnCr5 is 64.3MPa√m. The fracture toughness is calculated using Roberts-Newton formula. The endurance limit for EN 353 is 1000MPa & that of 20MnCr5 is 935MPa. The case carburized results show EN 353 has better case structure than 20MNCr5. The total 12 Numbers of gear sets, 6 each for 20 MnCr5 & EN 353, are validated for gear set fatigue on bench for particular torque. The performance of EN 353 is 24% better than 20MnCr5. The fatigue life of EN 353 is 39983 Cycles & that of 20MnCr5 is 30212 Cycles. The fracture mode is same in both the grades & typical fracture is on the Pinion. This study shows us the material change over is contributed significantly by improving the fatigue life of crown wheel pinion particularly for deeper gear ratios in heavy truck axles.
{"title":"Effect of Material Change from 20MnCr5 to EN 353 on Fatigue Performance of Crown Wheel Pinion ( Hypoid Gear Sets) of Full Float Axles - Case study","authors":"Yathish Rao","doi":"10.37285/ajmt.1.1.6","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.6","url":null,"abstract":"Crown wheel pinion is a prime member in transferring the power from transmission to wheel ends in automotive truck axles. Gear material is one of the deciding factors to estimate the fatigue life of the part. Higher the fatigue characteristics of the material better the fatigue performance of the part. In this case study, heavy truck axle with particular size having deep gear ratio is considered for material change from DIN 20MnCr5 to BS-EN 353, because its challenging to meet the life requirement in deeper gear ratios typically above 6. The basic material comparison conducted for metallurgical properties, jominy values, heat treatment properties, fatigue endurance limits, impact strength & fracture toughness. The analysis shows the EN 353 has 50% better impact strength, 35% better fracture toughness & 6.5% better endurance limit than that of 20MnCr5. The impact strength of EN 353 is 50J where as 20 MnCr5 is 25J, the fracture toughness of EN353 is 99.5 MPa√m & that of 20MnCr5 is 64.3MPa√m. The fracture toughness is calculated using Roberts-Newton formula. The endurance limit for EN 353 is 1000MPa & that of 20MnCr5 is 935MPa. The case carburized results show EN 353 has better case structure than 20MNCr5. The total 12 Numbers of gear sets, 6 each for 20 MnCr5 & EN 353, are validated for gear set fatigue on bench for particular torque. The performance of EN 353 is 24% better than 20MnCr5. The fatigue life of EN 353 is 39983 Cycles & that of 20MnCr5 is 30212 Cycles. The fracture mode is same in both the grades & typical fracture is on the Pinion. This study shows us the material change over is contributed significantly by improving the fatigue life of crown wheel pinion particularly for deeper gear ratios in heavy truck axles.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123186782","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 the concept and ideas for the development of Passive Four-Wheel Steering and will act as a foundation to build a robust and practical design. We always seek new methods to improve over existing ones, steering the rear wheels is always a fascination that an automotive engineer dreams of. The concept of treating angle as a vector quantity and further taking components of it and using them to generate Toe (steer) in the rear wheels through suspension linkages in accordance with the direction of cornering is analyzed in detail. Along with this a virtual design is incorporated and simulated to prove the practicality of the concept.
{"title":"Rear Wheel Roll Steering (Passive) Suspension Mechanism","authors":"Gauraang Singh Baghel","doi":"10.37285/ajmt.1.1.5","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.5","url":null,"abstract":"This paper focuses on the concept and ideas for the development of Passive Four-Wheel Steering and will act as a foundation to build a robust and practical design. We always seek new methods to improve over existing ones, steering the rear wheels is always a fascination that an automotive engineer dreams of. The concept of treating angle as a vector quantity and further taking components of it and using them to generate Toe (steer) in the rear wheels through suspension linkages in accordance with the direction of cornering is analyzed in detail. Along with this a virtual design is incorporated and simulated to prove the practicality of the concept.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115665133","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}
Basil John, M. P. Prajul, Jesvin Varughese Jose, K. Sujay, P. C. Jayadevan
In this paper we discuss the design, simulation and analysis of an electric conversion kit which would be able to convert an IC engine auto rickshaw to a pure electric vehicle. Retrofitting an old auto rickshaw not only eliminates the tailpipe emission from the vehicle but also helps to reduce the carbon footprint involved in manufacturing a new vehicle. For the purpose of understanding demands for an auto rickshaw to run in Indian city roads and towns we’ve conducted a survey among 33 auto rickshaw drivers from 3 different towns in Kerala which helped us to identify the most commonly used auto rickshaw model, and requirements for an auto taxi such as range for battery, power required for motor and other modifications that have to be carried out. And from the results we have designed a battery pack according to the requirements and a mounting plate which mounts the motor and the transmission to the frame of the vehicle and simulated a linear static load test on the mounting plate and a thermal analysis on the cell of the battery pack, an air cooling system for the battery pack was also designed to prevent thermal runaway of the cells during high loads. CAD designs and its simulations were done with the help of Fusion 360 and Altair Hyperworks.
{"title":"Design, Simulation and Analysis of Components for Electric Auto Conversion","authors":"Basil John, M. P. Prajul, Jesvin Varughese Jose, K. Sujay, P. C. Jayadevan","doi":"10.37285/ajmt.1.1.7","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.7","url":null,"abstract":"In this paper we discuss the design, simulation and analysis of an electric conversion kit which would be able to convert an IC engine auto rickshaw to a pure electric vehicle. Retrofitting an old auto rickshaw not only eliminates the tailpipe emission from the vehicle but also helps to reduce the carbon footprint involved in manufacturing a new vehicle. For the purpose of understanding demands for an auto rickshaw to run in Indian city roads and towns we’ve conducted a survey among 33 auto rickshaw drivers from 3 different towns in Kerala which helped us to identify the most commonly used auto rickshaw model, and requirements for an auto taxi such as range for battery, power required for motor and other modifications that have to be carried out. And from the results we have designed a battery pack according to the requirements and a mounting plate which mounts the motor and the transmission to the frame of the vehicle and simulated a linear static load test on the mounting plate and a thermal analysis on the cell of the battery pack, an air cooling system for the battery pack was also designed to prevent thermal runaway of the cells during high loads. CAD designs and its simulations were done with the help of Fusion 360 and Altair Hyperworks.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"109 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130601630","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 steering system design of a vehicle is of utmost importance as it not only acts as an interface between the driver and the entire vehicle but also is one of the key vehicle sub system which accounts for vehicle overall performance including vehicle handling and stability. With the recent infrastructure development and changes been witnessed in doing commercial vehicle business to hub and spoke and to door to door logistics delivery are expecting improved vehicle performance particularly in small and light commercial vehicles segments (SCV and LCV) where the business demands are more for the movement of vehicle in narrow city lanes and sharp corners. Also, now driver comfort is considered one of the key factors before purchasing any commercial vehicle. Thus, having power steering in SCV’s and LCV’s has not only become a mandate but also the vehicle steering system performance should be such that the driver is easily able to maneuver the vehicle in narrow city lanes and corners. Through this paper a methodology has been derived wherein factors contributing for achieving static lock to lock maneuverability in a power steering vehicle are analyzed without overdesigning the hydraulic power assistance of the vehicle. The approach mainly focuses on LH/RH symmetric hydraulic pressure build up in the system by critically designing the steering system linkages hard points such as drop arm length, drop arm SAP angle, steer arm length, track rod arm’s length. Also, this study ensures that the derived hard points not only enhances hydraulic assistance in the steering system but also ensures vehicle to have least turning circle diameter (TCD) and enhanced tire life by having least Ackermann error.
{"title":"Systematic Approach for Static Steering Effort Reduction through Linkages Optimization in Small Commercial Vehicles (SCV)","authors":"Mahadevan Pichandi","doi":"10.37285/ajmt.1.1.2","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.2","url":null,"abstract":"The steering system design of a vehicle is of utmost importance as it not only acts as an interface between the driver and the entire vehicle but also is one of the key vehicle sub system which accounts for vehicle overall performance including vehicle handling and stability. With the recent infrastructure development and changes been witnessed in doing commercial vehicle business to hub and spoke and to door to door logistics delivery are expecting improved vehicle performance particularly in small and light commercial vehicles segments (SCV and LCV) where the business demands are more for the movement of vehicle in narrow city lanes and sharp corners. Also, now driver comfort is considered one of the key factors before purchasing any commercial vehicle. Thus, having power steering in SCV’s and LCV’s has not only become a mandate but also the vehicle steering system performance should be such that the driver is easily able to maneuver the vehicle in narrow city lanes and corners. Through this paper a methodology has been derived wherein factors contributing for achieving static lock to lock maneuverability in a power steering vehicle are analyzed without overdesigning the hydraulic power assistance of the vehicle. The approach mainly focuses on LH/RH symmetric hydraulic pressure build up in the system by critically designing the steering system linkages hard points such as drop arm length, drop arm SAP angle, steer arm length, track rod arm’s length. Also, this study ensures that the derived hard points not only enhances hydraulic assistance in the steering system but also ensures vehicle to have least turning circle diameter (TCD) and enhanced tire life by having least Ackermann error.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122993448","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 the whole world moves towards the electric drive in the automotive sector, it is important for us to focus on the performance of the electric vehicles in the buses segment. For the better efficiency and performance of the vehicle, the temperature balance of the traction motor & auxiliary power electronic components is of utmost important. One of the main contributor for the power electronic components and traction motor thermal system is the Radiator fan. Two electric fans of smaller diameter are used unlike a single fan in engine cooling system. Both these fans are driven by individual BLDC motors, RPM and power consumption of the two electric fans purely depends on the radiator coolant outlet temperature. At full engaged condition, these two electric fans alone consume nearly 26% of the total LV load available for a 250 KW traction motor. In this paper a methodology is defined to calculate the power consumption of the two electric fans in actual vehicle running condition using KULI 1D software. Fan revolution is controlled based on coolant temperature and this is optimized to obtain an optimum control logic.
{"title":"Optimization of Electric Vehicle Radiator Fan Duty cycle using KULI 1D Transient Simulation","authors":"K. Raviteja Reddy, N. Kiran","doi":"10.37285/ajmt.1.1.9","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.9","url":null,"abstract":"As the whole world moves towards the electric drive in the automotive sector, it is important for us to focus on the performance of the electric vehicles in the buses segment. For the better efficiency and performance of the vehicle, the temperature balance of the traction motor & auxiliary power electronic components is of utmost important. One of the main contributor for the power electronic components and traction motor thermal system is the Radiator fan. Two electric fans of smaller diameter are used unlike a single fan in engine cooling system. Both these fans are driven by individual BLDC motors, RPM and power consumption of the two electric fans purely depends on the radiator coolant outlet temperature. At full engaged condition, these two electric fans alone consume nearly 26% of the total LV load available for a 250 KW traction motor. In this paper a methodology is defined to calculate the power consumption of the two electric fans in actual vehicle running condition using KULI 1D software. Fan revolution is controlled based on coolant temperature and this is optimized to obtain an optimum control logic.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123347908","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 the automobile industry is moving towards robust packaging, it becomes very important to understand all the unexplored sealing systems in the IC Engine, to come up with best vehicle experience for the customer. Typically, there is a configuration where the cam lobes try to push open the cam cover during the engine running condition, and RCM gasket is generally used to seal these joints. On the exhaust side of these engines, there will always be a T-Joint location which is an assembly junction of three or more components, often having dissimilar thermal properties. This location uses RCM gasket on one side of the junction which is closed with RTV seal next to it as a filler. This complex combination of 3-4 dissimilar components with 2 different seals at the T-Joint poses a challenge for effective sealing, to keep the vital fluids - oil / coolant from leaking out of the engine. In this paper, a methodology is discussed to simulate this kind of T-Joint sealing, under the application of thermal loading. CZM technique is used to model the interaction around the RTV seal to capture the right bond characteristic.
{"title":"Simulation of Room Temperature Vulcanized Gasket Failure at Engine T-Joints","authors":"Ricky Shaji, N Naveen Kumar","doi":"10.37285/ajmt.1.1.4","DOIUrl":"https://doi.org/10.37285/ajmt.1.1.4","url":null,"abstract":"As the automobile industry is moving towards robust packaging, it becomes very important to understand all the unexplored sealing systems in the IC Engine, to come up with best vehicle experience for the customer. Typically, there is a configuration where the cam lobes try to push open the cam cover during the engine running condition, and RCM gasket is generally used to seal these joints. On the exhaust side of these engines, there will always be a T-Joint location which is an assembly junction of three or more components, often having dissimilar thermal properties. This location uses RCM gasket on one side of the junction which is closed with RTV seal next to it as a filler. This complex combination of 3-4 dissimilar components with 2 different seals at the T-Joint poses a challenge for effective sealing, to keep the vital fluids - oil / coolant from leaking out of the engine. In this paper, a methodology is discussed to simulate this kind of T-Joint sealing, under the application of thermal loading. CZM technique is used to model the interaction around the RTV seal to capture the right bond characteristic.","PeriodicalId":294802,"journal":{"name":"ARAI Journal of Mobility Technology","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121245270","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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