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Design and Development of a Semi Active Electromagnetic Suspension System

ARAI-Kiran Pralhad Wani
B.Tech Research Student ARAI Academy-Palash Agrawal, Amey Desai, Jaya Surya Mallireddy
Published 2019-10-11 by SAE International in United States
This research paper includes the design and development of semi active suspension system using the permanent magnet, electromagnet and its control. The combination of permanent magnets is used to withstand static load of 20 kg. The controller is used to deploy the control logic and decide the supply of the required quantity of current to the electromagnets. There are two inputs given to the controller, one of them is air gap between upper magnets and lower magnets and second is the nature of the road profile in terms of amplitude of irregularity of the road. Based on the values of these two inputs the current supplied to the electromagnet is varied which results in variable damping force. The experimental setup for semi active suspension is developed. It includes a metallic roller fitted with irregularity similar to road profile, chain and sprocket connected to electric motor, whose magnitude is sensed and given as an input to the controller. Based on this input value, the current supplied is varied as per the predefined look-up table in the…
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Electro-Pneumatic Shifting System and Gear Control Unit for a Sequential Gearbox

ARAI-Kamalkishore Vora
ARAI Academy/VIT University-Siddharth Dahiya
Published 2016-02-01 by SAE International in United States
This paper describes the design methodology and algorithm development towards the design of an automatic external gear-shifting and clutch-actuation system for a sequential gearbox with the aim of providing the drivers with easier and an efficient means of shifting gears. Automatically actuated manual transmission system bridges the gap between automatic and manual transmissions which provides the advantages of both type of transmissions. This would ideally leads to faster shifting time and provide significant benefits in the form of electronic-aids like launch control and traction control. Removal of mechanical clutching would reduce fatigue and lead to ergonomic benefit. Based on the benchmarking performed on an easily available ready-to-install aftermarket alternative, options will be considered for the actuating mechanism and the most feasible will be used to develop a shifting system. A total shift time of about 100ms for upshifts and 150ms for downshifts without acceleration flatlining is the desired output. The developed system should be usable on any similar engine with a sequential gearbox by making small modifications to the GCU code and actuator force. The…
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Optimizing and Validating the Engine Performance and Emission Parameters on Engine Dynamometer through 1D Simulation of a Multi-Cylinder CNG Engine

ARAI-Sukrut Thipse, Kishorkumar Kavathekar, Ashwin Dsouza, Shailesh Sonawane
ARAI Academy-Vinayak Jadhav, Shubham Kanchan
Published 2016-02-01 by SAE International in United States
Environmental pollution has proven to be a big threat to our eco-system and pollution from automobiles using conventional fuels is a major contributor to this. Alternative fuels are the only immediate option that can help us counter the ever rising environmental pollution. In today’s date we cannot directly replace an IC engine, so the most efficient option available is using a fuel that can work with the IC engines other than gasoline and diesel. CNG proves to be the most promising fuel.A diesel engine converted to stoichiometric CNG engine was used for optimization. The paper deals with the improvement of engine power from 50HP to 60HP and up-gradation of the emission from BS-III to BS-IV norms of a multi-cylinder naturally aspirated engine. This was achieved by varying the compression ratio, valve-lift profile, intake plenum volume, runner length, spark-advance timing, fuel injection location, exhaust pipe length and catalytic converter selection. The CNG-engine was tested on the engine dynamometer, parallel a simulation model was developed on GT-power which was in sync with the actual engine data. Based…
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Optimisation of Parameters for the Production of Biodiesel from Jatropha Oil

ARAI-Aatmesh Jain, Kamalkishore Vora
D Y Patil School of Engineering-Vinod S Sherekar
Published 2016-02-01 by SAE International in United States
Biodiesel is an alternative fuel for diesel which is made through a chemical process which converts vegetable oils and fats of natural origin into fatty acid methyl esters (FAME). The most usual method to transform Bio-oil into biodiesel is Transesterification that can be carried out using different catalyst systems. Jatropha is second generation, non-edible oil and can be used for producing biodiesel.The Transesterification reaction consists of heating jatropha oil with proper concentration of methanol at appropriate temperature in the presence of catalyst. After reaction, the mixture is allowed to settle down for 8-10 hrs. Two separate layers, top layer of biodiesel and lower layer of glycerol will form, which can be separated.Reaction temperature, amount of methanol, catalyst and reaction time are important parameters which decide yield and quality of biodiesel. Apart from these, the free fatty acids (FFA) content of jatropha oil plays important role in deciding yield of biodiesel. Jatropha oil with less than 2% FFA is most preferred for transesterification, generally known as one-step process Whereas Jatropha oil with FFA value more than…
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Estimation of Temperature and Velocity Uniformity of Exhaust Gases in Heavy Commercial Vehicle Exhaust System having SCR After Treatment Technology

ARAI-Neelkanth V Marathe
Mahindra & Mahindra, Ltd.-Chintamani A. Mhaskar
Published 2016-02-01 by SAE International in United States
For meeting upcoming BS IV & BS V emission norms in Heavy Commercial Vehicles, most of the manufacturers are taking SCR after treatment route. Though SCR system is more complex and involves higher cost impact, an optimized SCR system can bring down the payback period to about one year due to improved fuel economy. For development of an SCR after treatment system, selection of a correct SCR catalyst and its position in the system is very important. NOX conversion efficiency of catalyst depends on exhaust gas temperature at the catalyst and the velocity distribution over the face of the catalyst. Generally catalysts are evaluated for the conversion efficiency in engine test bed. In a drive to have a first-time-right solution, a CFD analysis was carried out considering the low and high flow rate conditions. CFD simulation models and the corresponding results were used as a predictive tool in the exhaust system development process. These simulations helped to evaluate design proposals before finalizing the design. Prototype exhaust system components were developed for the best design proposal…
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CFD Modeling of Advanced Swirl Technique at Inlet-Runner for Diesel Engine

ARAI-Kamalkishore Vora
Moscow Institute of Physics & Technology-Sparsh Sharma
Published 2015-01-14 by SAE International in United States
This paper summarizes the research work incorporated in the exploration of the potential of swirling in CI Engine and designing of a new mechanism, particularly at inlet, to deliver it to improve the in-cylinder air characteristics to eventually improve mixing and combustion process to improve the engine performance.The research is concentrated on the measures to be done on engine geometry so as to not only deliver advantage to any specific fuel. According to the CI combustion theory, better engine performance may be achieved with Higher Viscous Fuel by improving the in-cylinder air-fuel mixing by increasing the swirl (rotation of air view from top of the cylinder) and tumble (rotation of air view from front of the cylinder) of in-cylinder air inside the fuel-injected region. The proposed inlet component is embedded with airfoil and is suitably designed after being iterated from four steps. The deciding factors of shape and orientation of these airfoils are height, chord length and number of blades. The preliminary assessment of the proposed component is performed on a CFD code using incompressible…
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Development of Dual Fuel (Diesel-CNG) Engine for SUV Application in India

SAE International Journal of Engines

ARAI-Sukrut Thipse, S D Rairikar, Shailesh B Sonawane, Vinayak Shivalink Sagare, Subhanker Dev, Kishor Kumar Kavathekar, Parag Mengaji, Ujjwala Shailesh Karle, Neelkanth V Marathe, Kausik Sinha
Vanaz Engineers Ltd-Ajit Vinayak Kulkarni, Suresh J Vispute
  • Journal Article
  • 2015-26-0058
Published 2015-01-14 by SAE International in United States
Towards the effort of reducing pollutant emissions, especially soot and nitrogen oxides, from direct injection Diesel engines, engineers have proposed various solutions, one of which is the use of a gaseous fuel as a partial supplement for liquid Diesel fuel. These engines are known as dual fuel combustion engines.A dual fuel (Diesel-CNG) engine is a base diesel engine fitted with a dual fuel conversion kit to enable use of clean burning alternative fuel like compressed natural gas. In this engine diesel and natural gas are burned simultaneously. Natural gas is fed into the cylinder along with intake air; the amount of diesel injection is reduced accordingly.Dual fuel engines have number of potential advantages like fuel flexibility, higher compression ratio, and better efficiency and less modifications on existing diesel engines. It is an ecological friendly technology due to lower PM and smoke emissions and retains the efficiency of diesel combustion.Normally natural gas is a cheaper fuel compared to diesel. Cost savings of dual fuel vehicles will depend on the share of gas added. In view of…
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Productivity Improvement in Forging Process by Using Computer Simulation

ARAI-Abhijit Kumbhar, Jagannath M Paranjpe, Nagesh Voderahobli Karanth
ARAI - Foring Industry Division-Satyajeet Kulkarni
Published 2015-01-14 by SAE International in United States
To achieve first time right product in any new part development, the process requires number of trials, skilled manpower, huge cost and massive time. In case of forging process, to develop a new component lot of physical trials are required to be conducted due to the process variations. The need of the hour is shorter development time with highest quality. All these requirements can be achieved with the help of reliable computer simulations. With computer simulation, the process can be optimized and crack analysis can be carried out. Additionally the use of computer simulation in forging process reduces no. of trials, ultimately saves time and energy.The paper deals with forging process optimization by effective use of computer simulation. Existing forging process and modified forging process was simulated. The simulation software was able to simulate crack generation due to improper metal flow as observed in existing forging simulation process, and a good co-relation was established. Elimination of crack while maintaining the productivity was the main challenge. Crack was eliminated by introducing changes in forging process. Simulation…
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Effect of Oxygenate and Cetane Improver on Performance and Emissions of Diesel Engine Fuelled with Diethyl Ether-Diesel Blends

ARAI-S. S. Thipse
Symbiosis Institute of Technology-Arundhati Warke
Published 2015-01-14 by SAE International in United States
Diethyl Ether (DEE) is a promising oxygenated renewable bio-base resource fuel used for diesel engines, owing to its high ignition quality. An experimental investigation has been carried out to evaluate the effects of DEE blends with diesel on the combustion, performance and emission characteristics of a direct injection diesel engine. The engine tests are carried out for 10%, 25%, 50%, 75% and 100% of the full load. In this study, 2%, 5%, 8%, 10%, 15%, 20% and 25% of DEE (by volume) are blended with diesel. Beyond 25% DEE blend, the viscosity and density of the blended fuel reduces as compared to the acceptable limits, that can further reduces the lubricity and create potential wear problems in sensitive fuel injection pump and fuel injector design.The laboratory fuel tests showed that DEE can be mixed in any proportion in diesel fuel. The blended fuel retains the desirable physical properties of diesel fuel but includes the cleaner burning capability of DEE.The experimental results indicated that the blends of DEE with diesel up to 25% are possible. The…
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Effect of Excitation Methods on Experimental Modal Analysis of Passenger Car Tire

ARAI-Ramkumar Rajamanickam
Tata Motors Ltd-Yogesh Yeola, Ashish Tiwari
Published 2013-11-27 by SAE International in United States
Tire modal performance plays an important role in passenger car NVH refinement which includes road induced noise. Work done in the past, enumerates testing methods, excitation technique applied and boundary conditions. It also includes Mode shapes, analysis results and study of variables affecting the modal performance of passenger car Tire. Here, in this paper an attempt is made to compare the experimental modal analysis results, obtained using two different excitation techniques for exciting tire.In the experimental modal analysis under discussion, the passenger car tire of type 175/65R14, was inflated up to 2.2 bar (32psi) pressure in free-free condition. Impact Hammer and Electro-dynamic shaker were used to excite the tire structure in radial direction. Single Input Multiple Output technique was used for excitation and response signal acquisition. Modal parameters of the tested tire were identified in the frequency domain with curve fitting technique and modal parameter estimation technique. In-plane, circumferential mode shape, frequencies and modal damping were compared. First acoustic air cavity mode of tire was calculated theoretically and compared with the experimental results obtained from…
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