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Viewing 1 to 30 of 29539
2015-03-30
Technical Paper
2015-01-0085
Setthaluth Pangkreung
Although Thailand is a main producer of oil palm fresh fruit bunches (FFBs), there is no specific vehicle for these plantation farmers which fits the harvesting and transportation requirements. The voice of palm oil plantation smallholders was surveyed in several regions of Thailand in order to develop and design a suitable transportation system. As a result, most of samples need a farm truck, which can carry a maximum payload of three tons and can survive on the rough terrain in farm. To meet these requirements, the new three-cylinder engine with more power, the 4WD driveline, the front and rear axles with full load capacity of over 5 tons are introduced in the new farm truck. In addition, the suspension system of the farm truck, which was mostly designed without engineering knowledge, is to be developed in accordance with the vehicle layout, the upper body weight, and the vehicle dynamics in vertical direction. The suspension engineers face many challenges.
2015-03-30
Technical Paper
2015-01-0087
Prasit Wattanawongsakun
Design and Development of Engine-Clutch-Flywheels of Farm Truck PRASIT Wattanawongsakun*, NARONG Pitaksapsin, PERAKIT Viriyarattanasak, SARAWUT Lerspalungsanti National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, 12120, Thailand *Corresponding author: E-mail prasitw@mtec.or.th Keywords: Farm truck, Flywheel adaptor, FE Analysis Nowadays, most agricultural product transportations are designed for multi-purpose functions, farming activities and agro-processing industries may need specific types of transportations. Oil palm product is one example that represents the lack of product-specific transportation vehicle. This study investigates the fundamental requirements and component design of a farm truck designed for oil palm fresh fruit bunches (FFBs) transportation.
2015-03-30
Technical Paper
2015-01-0086
Gaurav Paliwal
The main emphasis for a Commercial vehicle design which was focused on fuel-economy and durability does not fulfill the increasing customer expectations anymore. Commercial vehicle designers need to focus on other vehicle aspects such as steering, ride comfort, NVH, braking, ergonomics and aesthetics in order to provide car like perception to truck, bus drivers and passengers during long distance drives. Steering system on long wheel base trucks must perform many functions: First and foremost, it needs to provide a reasonably small turning radius so as to achieve good maneuverability. Second, it also needs to have geometrical compatibility with suspension system so as to minimize bump steer and achieve good handling control as well as to minimize tire wear. These Requirements contradict each other & hence a suitable "Tradeoff" is needed for achieving these targets.
2015-03-30
Technical Paper
2015-01-0093
Chiu Chou Lin
This paper investigates the way to control the fuel injection timing for diesel engine running with biofuels. The research was conducted by experiments. Two fuels, B100 and B2, were used for experiments. The engine was operated under the ESC 13 modes operation condition. In each mode, five different injection timings were tested and the associated engine performance data were recorded. During the process, the cylinder pressure variations were also captured by the pressure transducer and the pressure data were then used to calculate the indicated thermal efficiency and combustion characteristic, including the heat release rate and the crank angles from the beginning of combustion to the point that 50% of fuel was burned (CA50). By comparing the measured torque and brake thermal efficiency, the best CA50 can be determined at each operating mode.
2015-03-30
Technical Paper
2015-01-0092
Jittrin Nimitpermpoon
Nowadays we are facing with fossil fuel crisis and global warming problems and need to find the solutions for these problems. To reduce the usage of fossil fuel, the increasing of efficiency is important. In some country, they use the Wide-Base-Single tire for trailer because it has less rolling resistance than dual normal tire. In Thai industries also use many trailers. If the efficiency of trailers is increase, it will have great effect to the fuel usage in Thailand. But when the tires have been changed, stability of the trailer also changed. To make sure that the trailer stability and controllability is not lower than the standard, the trailer with Wide-Base-Single tire will be investigated. This thesis will focus in trailer dynamics and stability simulation to compare the result of trailer between the dual normal tire and Wide-Base-Single tire.
2015-03-30
Technical Paper
2015-01-0091
Gaurav Paliwal
The need to develop products faster and to have designs which are first time right have put enormous pressure on the product development timelines, thus making Computer Aided Optimization one of the most important tool in achieving this targets. In this paper, a Design of Experiments (DOE) study is used, to gain an insight as to, how changes to different parameters of Front Suspension & Steering of a Passenger Bus affect its kinematic properties & thus to obtain an optimized design in terms of Handling parameters such as bump steer, roll steer, percent Ackerman, Lock to Lock rotation angle. The Conventional Hit & Trial method is time consuming and monotonous & still is an approximate method, whereas in Design of Experiments (DOE), a model is repeatedly run through simulations in a single setup, for various combinations of parameter settings. Effects and interactions of the design variables of the model are then studied, which provides an insight to help design an optimized model.
2015-03-30
Technical Paper
2015-01-0090
Cherdsak Chuaymung
A vehicle of interest in this paper was a light agriculture truck operated by a 14 hp single cylinder engine. Its chassis type is a ladder frame with Hotchkiss setup suspension. In Thailand this particular truck is also called E-TAN and is mostly driven on rough terrains under agricultural applications. To improve the current design, the information on a structural strength of the truck frame is required. A combination of physical tests and computer simulations was arranged to obtain reliable predictions of stress generated in the frame under load. For the simulations, a Computer Aided Design (CAD) model of the ladder frame included a main frame and a sub frame, on which an engine and transmission system would be mounted. Leaf spring mounting brackets were modeled as well as shock absorbers mounting structures. A completed Finite Element (FE) model of the frame contains 29,730 quadratic shell elements and 34,055 nodes.
2015-03-30
Technical Paper
2015-01-0097
Tom Van Dijck
This work describes the evaluation of the aerodynamic forces acting upon a road going sport motorcycle (modified for racing purposes) during a high speed, high lean angle cornering manoeuvre using commercial computational fluid dynamics software. The subject of motorcycle cornering aerodynamics is currently one not widely covered in literature. The research presented in this paper aims to provide a basis for investigations into the improvement of motorcycle cornering performance through aerodynamic modifications. Results were obtained through steady-state RANS simulation, using the k-epsilon turbulence model, of the vehicle during a cornering manoeuvre at a constant speed of 38 m/s with the lean angle varying from 45 to 55 degrees from vertical. This manoeuvre was analysed in 1 degree intervals. Large lift forces were observed, with centre of pressure located near the front of the motorcycle, which increase as the motorcycle leans further.
2015-03-30
Technical Paper
2015-01-0096
Kittichart Tumaiam
Nowadays, human realize to the environment pollution cause from old engine and use the engine misapply. These engines will cause the problem such as air pollution and cannot use the engine to work at the maximum efficiency and fuel consumption. The new of control technologies can solve problems from misuse engine by an electronic control unit work with many sensors. Optimization of electronic control unit (ECU) makes an engine to work in maximum efficiency and decrease the environment pollution. In this research, gasoline Jaguar engine, AJ30-V6, A six cylinder 60 degree ‘V’ configuration, 2967 cc, Power 240 hp (179 kW; 243 PS) at 6800 RPM and Torque 216 lb•ft (293 N•m) at 4500 RPM, is use as the boat engine. This engine is port-fuel injection spark ignition engine (PFI Engine) fuelled with gasoline. To use car engine as boat engine, the control system has to be modify and tune up for proper condition.
2015-03-30
Technical Paper
2015-01-0095
Yu Lung Hsu
The main purpose of this research is to investigate the effect of volumetric efficiency of a four cylinder four stroke engine with different kinds of design parameters. There are several methods to improve the volumetric efficiency, such as changing the valve lift, the valve timing, the intake pipe parameters and setting the Helmholtz Resonator. In the research, we focus on two design parameters of intake system, adding Helmholtz Resonator and the valve timing. In Helmholtz Resonator part, we compare results of two conditions, with and without Helmholtz Resonator. Under the situation with Helmholtz Resonator, the position and the volume are also considered. And analyze the effect of the different kinds of design parameters on the volumetric efficiency. The position one of the resonator is between the gas storage tank and the air filter. There is only one intake pipe, so only one resonator is set on the pipe.
2015-03-30
Technical Paper
2015-01-0094
Supakit Rooppakhun, Pornporm Boonporm, Worawat Puangcha-um
The method of analyzing the best thin-wall-tubed cross-sectional shape of impact attenuator for student formula is proposed in this study by ways of simulation and validation in any case following SAE rules. We performed using ANSYS-Explicit Dynamics method for simulation and compared the result like energy absorption among six cross-sectional shaped circle, square, hexagon, cone, square pyramid and hexagonal pyramid. The results show that at the certain deformation, the circle-shaped absorbs energy higher than others. Cone, square pyramid, hexagonal pyramid, hexagon and square can absorb the energy compare to circle as 68.5%, 53.9%, 47.8%, 30% and 1.8% respectively. We compared the result of circle cross sectional case to the quasi static experiment and found that it was in the same trend.
2015-03-30
Technical Paper
2015-01-0099
Teerapan Uttaranagara
This study is compares the effect on fuel consumption between Wide-base single tires and Dual tires semi-trailer truck. Our assumption is focused on variation of tread width impact on fuel consumption. Rolling resistance of tire is calculated and measured by Drum tester following UN ECE R-117 standard, and then predicted the rolling resistance coefficient by using the finite element analysis ( FEA ) with the simulation software. After that, predicted the fuel consumption with computer simulation program. This testing is also considered as international research, reports and followed to acceptable standard. From the expected result of this study, wide tread width should be consume fuel lower than narrow tread width because low rolling resistance coefficient indicate the reducing of fuel consumption when using Wide-base single tire. This study is expected that can be used as reference and motivation for a changing of government regulations regarding the use of Wide-base tires.
2015-03-30
Technical Paper
2015-01-0110
Anuj Kumar
The Flame Ionization Detection (FID) is the most widely used and sensitive technology for the measurement of total hydrocarbons (THC). The fuel used for the flame in the FID analyzer is a mixture of hydrogen and helium in the ratio of 40:60 in the automotive emission testing of hydrocarbon determination. Helium is the second most abundant element in the universe; however, its consistent supply over long run continues to be marked by uncertainty. Environmental protection Agency (EPA) revised 40CFR part 1065 in April 2014 to include Nitrogen balance gas as an alternative option of He with H2 for FID Fuel in the automotive industry for hydrocarbon emission testing. Blend tolerance of the FID fuel has also been decreased to 40±1% (0.39 to 0.41mol/mol) H2 in the revised regulations to minimize its impact on analyzer response. The availability of nitrogen as FID fuel balance gas was studied and compared with He balance gas to understand the relative impact on emission testing.
2015-03-30
Technical Paper
2015-01-0120
Kraiwut Kujirapan
Nobody can deny that engine control unit (ECU) technology, nowadays, plays a significant role in our automotive society. ECU is a type of electronic control unit that controls the engine to run at a proper condition. In modern cars, they are equipped with numerous electronic control units to make the car being controlled more precisely. In this research, gasoline Jaguar engine, AJ-30 V6, 6- cylinders, 3.0 litre, is use as the boat engine. This engine is port-fuel injection spark ignition engine (PFI Engine) fuelled with gasoline and gasohol(E10, E20, E85). To use car engine as boat engine, the control system has to be redesigned. For the method, the experiment will be done to make a proper control system for the boat. At first, we will test an engine at no load condition (from idle speed to 3000rpm) and try to control the engine to run properly and see the effect fuel on emission.
2015-01-14
Technical Paper
2015-26-0236
Zhiteng Zhou, Yaohua He, Dong Wang
  In order to satisfy the requirements of wireless communication in online automatic testing system for vehicle driving wandering, this essay discusses the application of persistent connection strategy in testing system. Through the experimental analysis of delay problem of communication strategy, it draws the timeline from the perspective of transport layer in TCP/IP protocol, and proposes the spit connection strategy. Based the Markov Chain of the two strategies, it deeply analyzes the instantaneity of dynamic communication in different electromagnetic environments from the perspective of state transition. Split connection, which meets the need of engineering test, is proved to have higher instantaneity and efficiency after numerous field tests under complicated electromagnetic interference environment.
2015-01-14
Technical Paper
2015-26-0208
Xiongwen Lu
The main purpose of this paper is to research the aerodynamic characteristics of the Formula SAE car. A more accurate CAD model is built to reduce the impact of oversimplification. Computational Fluid Dynamics (CFD) method is adapted. The computational domain is meshed with tetrahedral and polyhedral cells and the flow field is predicted using the Realizable k - ε turbulence model. Data obtained in this study include the aerodynamic drag and lift coefficients, pressure distribution on external surfaces and velocity distribution at different cross sections. The pressure distribution is investigated in a quantitative manner. An in-depth study is undertaken to analyze the turbulence structure in the wake. The research indicates that the front and rear wings have a notable impact on the external aerodynamics of the car. Furthermore, several suggestions are put forward to make the Formula SAE car achieve higher levels of performance.
2015-01-14
Technical Paper
2015-26-0211
Parandhamaiah Gorre, Pln Prasad, Mansinh Kumbhar, Gajanan Kale, Vamsi Pathapadu
Electric cars are the future of urban mobility which have very less carbon foot print. Unlike the conventional cars which uses BIW (Body in White), some of the electric cars are made with a space frame architecture, which is light weight and suitable for low volume production. In this architecture, underbody consists of frames, battery pack, electronics housing and electric motor. Under body drag increases due to air entrapment around these components. Aerodynamic study for baseline model using CFD simulations showed that there was a considerable air resistance due to underbody components. To reduce the underbody drag, different add-ons are used and their effect on drag is studied. A front spoiler (air dam) is used to deflect the incoming air towards sides of the car. A front bumper cover for front components, trailing arm cover for trailing arm and rear bumper cover for rear components were used to reduce underbody drag.
2015-01-14
Technical Paper
2015-26-0197
Ashit Kumar, Amarjeet Singh, Felix Regin A
Reducing the carbon footprint by meeting stringent emission regulations and improving the fuel efficiency has become an essential feature in 21st century product design cycle for automobiles. Vehicle aerodynamic has become increasingly important every year. Vehicle weight is reducing progressively every year and the interaction between the aerodynamic forces and vehicle body is becoming more complex and important. Ground clearance affects the lift and drag forces considerably. Lift affects the vehicle stability and is important for safety while Drag force directly affects the fuel economy of the vehicle. Various drag reduction devices such as air dam, rim cover, spoiler and undercover etc. are added to reduce the drag. Vehicle aerodynamic drag is affected by a number of parameters like –exterior geometry, grill open area, layout of underbody parts, tire specification and suspension layout.
2015-01-14
Technical Paper
2015-26-0180
Bhupinder Singh, Vikas Rawla, Rajesh Vats, Arun Kumar
Clutch actuation system in manual transmission is one of the key systems of power-train with which driver interacts frequently. Therefore its load and travel feeling are important to customer. Clutch actuation system consists of clutch pedal assy, flexible cable mounted on body panel, and clutch release arm/shaft assy inside transmission unit assy. Clutch pedal load, travel and engagement point are important parameters to specify the actuation feeling while designing the clutch actuation system. Validation of actual values is being done at vehicle proto testing stage as final output calculation may not be accurate due to dependency on variables difficult to estimate. To overcome these difficulties a virtual dynamic model of the entire clutch actuation mechanism has been created in MBD software. Model input factors are based on actual testing results to improve the accuracy. The model predicts the Clutch pedal load and travel values for a given set of vehicle inputs.
2015-01-14
Technical Paper
2015-26-0179
Ballapu Harshavardhan, J M Mallikarjuna
Today, direct injection spark ignition (DISI) engines are widely used in automobiles due to their fuel economy and low exhaust emissions. They operate with lean stratified mixture in most of load conditions. However, performance and emissions of them are dependent on stratification at different load conditions. In fact, stratification in these engines depends upon in-cylinder flows and air-fuel interactions, which in turn depend on combustion-chamber-shape, intake manifold configuration, compression ratio and engine speed etc. Among them, combustion chamber shape plays an important role and hence understanding its effect is very much essential to optimize the combustion chamber configuration in these engines.
2015-01-14
Technical Paper
2015-26-0182
Swapnil D Vyas, Ashok Patidar, Suresh K Kandreegula, Umashanker Gupta
Abstract A Coupled CFD – FE Analysis, referred as Conjugate Heat Transfer (CHT) Analysis in Professional terms, is very important for the processes that involves simultaneous energy exchange between solid and fluid domains. If we consider IC engines, Exhaust Manifold is one of the critical areas where above mentioned phenomenon takes place. In this paper, temperature distribution in solid parts of exhaust manifold is obtained through CFD (Computational Fluid Dynamics) analysis which uses Finite Volume Method (FVM) for solving, and using these temperatures Thermal Stresses are evaluated through Finite Element Method (FEM). For coupling between FVM and FEM, approach used is – temperature and flow field variable is solved using CFD software, and resulted temperature field is interpolated to nodes of FE mesh for evaluation of Thermal Stresses.
2015-01-14
Technical Paper
2015-26-0176
Alberto Boretti, Joseph Scalzo
The paper discusses the design of a 65 degrees V-four Moto GP engines engine having traditional four poppet valves and one intake and one exhaust rotary valve per cylinder. The rotary valve defines an open passage that may permit up to extremely sharp opening or closing and very large gas exchange areas. In addition, the rotary valve assembly permits higher speeds of rotation and reduced friction. While the poppet valve engine delivers 260 HP revving 18,000 rpm, it is estimated that the rotary valve may permit more than 290 HP revving up to 20,000 rpm.
2015-01-14
Technical Paper
2015-26-0185
Kartik Panchal
The front and rear wings are essential in race cars in order to increase the down-force and enhance the stability of vehicle at high speed. The present work focuses on the computational modelling of NACA 4412 airfoil for front and rear wing of the racing vehicle and assesses its performance characteristics. The effect on wing characteristics in vicinity of ground and tire for varying angle of attack in moving ground frame has been studied. The computation has been carried out using high fidelity computational fluid dynamics model to solve the incompressible Navier-Stokes equations. The front wing has been split into two parts main wing and flap with chord length of 0.3 meters and 0.15 meters respectively. Similarly, the rear wing was modelled with the chord length 0.3meter and aspect ratio of 1.5. The pressure and velocity flow distribution over the body of the vehicle has been studied for varying angle of attack.
2015-01-14
Technical Paper
2015-26-0219
Sahil Kakria, IVN SriHarsha, Milind Wagh
Suspension and chassis play a vital role in the structural performance of an off-road vehicle. The paper focuses on Computer Aided Engineering (CAE) modeling and simulation study of an All Terrain Vehicle (ATV) structure to analyze its static and dynamic behavior. An integrated MBD-FEA approach used for analysis purpose has been presented. In the study, a Multi Body Dynamic (MBD) model of the ATV suspension system is built using ADAMS/Car. The effect of change in suspension hardpoints on suspension characteristics has been analyzed by carrying out Design of Experiment (DOE) study using ADAMS/Insight. This is done to minimize roll, camber and kingpin angle variation during vertical wheel travel, thus increasing stability of the vehicle under rough road conditions. This helps in optimizing the front and rear suspension geometry of ATV. The Finite Element (FE) model of ATV chassis is prepared to check its structural integrity.
2015-01-14
Technical Paper
2015-26-0135
Kalpesh Mistry, Nitin Badhe, Steve Fisher
Vehicle level Acoustic sound pack sensitivity and Test correlation by utilising Statistical Energy Analysis (SEA) technique for Premium SUV Kalpesh A. Mistry, Atul D. Pol, Ajay Virmalwar Tata Technologies Ltd., Pune, India Steve Fisher Jaguar Land Rover Ltd., Gaydon, UK SAE SIAT at India,2015 Abstract Due to increased awareness by customer perceived sound characteristics, advance simulation technique emerged in NVH domain for mid-high frequency like BEM, Hybrid and Statistical Energy Analysis (SEA). Structure-borne noise simulation primarily relies on the finite element (FE) technique and due to wide knowledge base, it is in position to get correlated results and prediction. One of the most widely and accepted practice is SEA to assess and optimize Acoustic sound pack for Air Borne Noise (ABN) in the range of 400 Hz to 10,000 Hz typically for Powertrain and Tyre Patch Noise Reduction. As Prof.
2015-01-14
Technical Paper
2015-26-0148
Jagadeesh Selvaraj, Dayalan Purushothaman, P T Haridas
Fuel economy is an important parameter which determines the position of either On-road or Off-road vehicles in the market. Earth-movers are heavy duty Off-road vehicles that are used for construction works. Currently fuel consumption in earth-movers is quantified as fuel consumed per unit time (Liters per hour). Similarly, conventional measure of productivity of the earth-movers is in terms of volume of soil trenched per hour. Measurements using the above scales showed wide variations in measured fuel consumption and productivity, • for the same equipment between measurements • two equipment of same make at different trench locations and • against the competitor equipment The reason for this variation includes the difference in soil density at different places at different depths. Thus the earth-mover in trenching operation might consume less fuel/hour and gives more productivity for the soil density being less and vice versa for the soil density being high.
2015-01-14
Technical Paper
2015-26-0078
Parth Lunia, Mrigendra Prajapati, V Jayashankar, Varun Parakh, Samir Rawte
A parking brake or hand brake is the mechanical hand or foot operated secondary braking system that prevents the vehicle from rolling or slipping when parked on the gradient or leveled surface and provides assistance to stop/slowdown the vehicle in case of service brake failure. This paper is an attempt to compile a systematic approach which can be easily incorporated in a product development system to design and develop parking brake system for passenger cars having rear drum brakes which in turn can effectively reduce the lead time and give a better performance. Vehicle GVW, percentage gradient and maximum effort limits (As per IS 11852-Part 3), Tire and drum brake specifications were taken as front loading. This data is further used for target setting of functional and engineering parameters, such as Lever Pull Effort, Lever Ratio and angular travel of lever. Design calculations were performed to obtain theoretical value of critical parameters like lever effort and travel.
2015-01-14
Technical Paper
2015-26-0234
Ramesh Pathuri, Yuvraj Patil, Prasanna Vyankatesh Nagarhalli
During early phases of vehicle program, evaluation of Air Conditioning (AC) system for its performance (time to comfort) and power consumption has become vital and hence simulation tools have gained tremendous importance. A 1D simulation model can be introduced early in the design process to evaluate several AC system configurations and parametric studies at different test conditions and which results in reduced experimental work. This paper presents a method for AC cool down simulation of passenger car with multi air zone cabin model in KULI. This approach allows the prediction of zone wise (head, body and foot) temperature and humidity distribution in the cabin for parameter studies for transient analysis. The same cabin model can deal with multiple inlets into the cabin, solar radiation, and recirculation for pre-defined cabin types.
2015-01-14
Technical Paper
2015-26-0207
Kamran Hashmi, D Radhakrishna
Abstract This paper deals with the application of 1-D simulation technique for prediction of engine performance at high altitudes. 1-Dimensional (1-D) engine simulation is an important tool for engine development activities. Engine design through simulation can substantially cut down time needed to execute experiments and prototyping, as todays softwares can simulate most of the experiments.This approach was applied for simulation of a spark-ignited engine for Unmanned Aerial Vehicle (UAV).A detailed 1-D thermodynamic model was prepared for the engine configuration in Ricardo WAVE environment; different simulation runs were executed and then performance parameters like brake power, torque, specific fuel consumption, BMEP, in-cylinder pressure etc were predicted. A predicted performance shall always be co-related with test results for correct interpretation.
2015-01-14
Technical Paper
2015-26-0205
N. Prabhakar, Suresh Gayakwad J, P. Lingeswaramurthy, P.S. Lakshman
The present investigation deals with the design and shape optimization of the steel insert used in the hand brake valve to withstand the impact load during brake off condition. This hand brake valve is used in the vehicles for parking brake application. It consists of a steel insert with a helical coil spring for locking and unlocking of a lever during brake on and off condition. Also a torsion spring with a cam mechanism is used for opening and closing of a hand brake valve. When the lever is locked the flexible elastic object (torsion spring) stores the mechanical energy when it is twisted. When it is unlocked (braking off) it exerts a force (actually torque) in the opposite direction, proportional to the angle it is twisted. During the braking off condition the steel insert gains the angular velocity from the stored mechanical energy of the torsion spring.
Viewing 1 to 30 of 29539