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Viewing 1 to 30 of 102495
2015-03-30
Technical Paper
2015-01-0080
Pornporm Boonporm, Supakit Retired Chaiyo
Handling behavior of FSAE during cornering is proposed by means of analytical and experimental for assisting our suspension geometry design. Roll rate, yaw rate and weight transfer were investigated based on vehicle’s geometry and parameters and calculated by varying camber angle, longitudinal velocity and radius of curvature. The example case with radius 7.63 meter and 1.65g lateral acceleration, there was 2.82% weight transfer difference and it assumed oversteer. The experiment was set up to prove our method concerning inertial measurement unit. These results were compared in various cases and it has shown the correlation between each other
2015-03-30
Technical Paper
2015-01-0081
Chunguang Duan, Hsin guan
With the development of computer and vehicle research to high frequency, the driving simulator plays an important role on vehicle research and pre-development. The driving simulator have already used for research about human factor, advanced active system (ABS, ESP et al), the vehicle engineering, intelligent transportation system (ITS) et al. The requirements for a driving simulator are that it should have realistic behavior. One aspect of the realistic behavior is that the driving simulator needs to be able to stop and to start again. The realistic behavior base on high-fidelity dynamic models especially tire model. “Tire/road” model is of special importance model for its influence on vehicle simulation results. The forces for accelerating, braking and steering are all come from tire road contact. The simulator simulation faces all possible driving situations as driving the real vehicle, like parking on the hill, stop and start again, sharp steering, sharp braking et al.
2015-03-30
Technical Paper
2015-01-0084
Xuwei Luo
Turbocharged gasoline direct injection (GTDI) engines can achieve a very high level of brake mean effective pressure and thus the engines can be downsized considerably. The biggest challenge in developing highly-boosted GTDI engines may be how to mitigate the pre-ignition (PI) triggered severe engine knocks at low engine speeds. Because the magnitude of cylinder pressure fluctuations during aforementioned engine knocks reach those for peak firing pressures in normal combustions, they are characterized as super knocks. It is widely believed that the root cause for super knocks is the oil particles entering the engine cylinder, which pre-ignite the cylinder mixture in late of the compression stroke. It is neither possible nor practical to completely eliminate the oil particles from the engine cylinder. A reasonable approach to mitigate super knocks is to weaken the conditions favoring super knocks.
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
2015-01-0082
Husain Kanchwala, Carlos Bordons PhD
Electric vehicles (EVs) have been gaining a lot of focus and attention as they run clean and are environment friendly. EVs use in-hub motors, which can be independently controlled, improving this way the maneuverability and allowing augmented control actions. This paper discusses the development of a Model Predictive Controller (MPC) to improve vehicle handling characteristics. Wheel torques are independently controlled using direct yaw moment and side slip control method to pro-actively improve vehicle handling. At high values of side slip the steering is no more capable of generating yaw moment and vehicle becomes laterally unstable. By unequal torque distribution a restoring yaw moment is generated and vehicle stability is ensured. The MPC computes the optimal couple traction/braking torque of the four in-wheel motors, from basic driving slogans, which are, steering angle and desired speed.
2015-03-30
Technical Paper
2015-01-0089
Kantapit Meetam
Thailand is a country with the great potential for agricultural production of food and fuel such as rice, palm and sugar cane. The Entrepreneurs in small and medium sized enterprise (SME) have an experience in sugarcane loader construction for a long time but it has not been developed with sufficient and appropriate engineering and technologies. Thus, the purpose of this research is to design and development a sugarcane loader structure base on engineering. The structure of sugarcane loader will be designed by Computer Aided Design (CAD) and Computer Aided Engineering (CAE), for the KUBOTA ZL-1 Reverse tractor with a 45 horsepower, which can install grab equipment to lift the 300 kilogram of Sugarcane on 5 meters from ground, that total load is approximately 3.5 tons. Use finite element method (FEM) to simulate stress contour occur on part with the sufficient structural strength to operate on the farm.
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
2015-01-0101
Piyapong Premvaranon
Due to recent oil price crisis and an ever-increasing public awareness on environmental issues, an interest in electric vehicles (EV) has increased tremendously in Thailand and other Asian countries over the last few years. In this study, a prototype of 9-metre battery electric vehicle (BEV) bus was chosen as a vehicle of interest to undergo a series of field test by operating the lead acid battery powered electric bus in order to estimate a power demand of the bus as well as to evaluate a battery performance characteristic Two different types of battery were employed in this study i.e. a flooded-type deep cycle lead acid battery and a valve regulated lead acid (VRLA) battery. The effect of different driving modes available from the drive motor i.e. normal, max power, max range, as well as regenerative braking feature would be investigated while an influence of drivers were also taken into account to ensure the repeatability of the obtained results.
2015-03-30
Technical Paper
2015-01-0100
Kowit Tuayharn
Abstract Despite the rapid growth of automotive industries at present, many car users tend to use vehicles that consume various energy forms. Using the automobiles, either for the sake of commuting or transporting, is always necessary to use the fuel as an energy source for the automobiles. Fuel consumption means the rate of using the fuel per a travelling distance that an automobile requires to use. It is a value associated with different specific conditions. This project research is to study the fuel consumption rates including the emission that impacts the environment and humans between internal combustion and electric motorcycle. The methodology is to run both types on chassis dynamometer by using the standard driving cycle of the Economic Commission of Europe (ECE) to compare the fuel consumption rates and emission under the same conditions.
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
2015-01-0098
Suresh Kumar Kandreegula, Naveen Sukumar, Sunil endugu, Umashanker Gupta
Advanced Non-linear topology optimization methods have been addressed as the most promising techniques for low-weight and performance design of Powertrain structures. The theoretical achievements are obtained both mechanically and mathematically. Nowadays, the great challenge lies in solving more complicated engineering design problems with multidisciplinary objectives or complex structural systems. The purpose of this paper is to provide a forum to present new developments in structural Non-linear topology optimization. The advantage of the proposed method is that structural optimization on irregular design domains can be carried out easily. Furthermore, this method integrates the stress analysis and the boundary evolution within the framework of finite element methods. In this paper, we have mainly focused on the Commercial Vehicles Powertrain component i.e. Transmission Housing.
2015-03-30
Technical Paper
2015-01-0102
JENWIT SOPARAT
In order to cope with expected fossil energy shortage and to alleviate environmental issues, electric vehicles (EV) have been considered as one of the main alternative solutions in many countries including Thailand. To develop an electric vehicle, there were 4 important topics that should be considered i.e. motor, brake system, chassis structure, and battery. For battery, principally a group of battery cells would be packed together within a rigid structure, which was enclosed with electric insulator plates for a safety reason. However, with an ongoing trend of batteries being compact in size and high in current capacity, temperatures developed inside these batteries during charging/discharging could become a significant issue. Therefore, the present study focused on a design of a battery cooling system operating on an indoor air circulation.
2015-03-30
Technical Paper
2015-01-0103
Siriorn Pitanuwat
This study attempts to investigate the effects of driving behavior on the fuel economy of hybrid and gasoline vehicles. According to the variation of vehicles’ fuel economy, driving behavior is one of the most dominant factor that contributes to excessive fuel consumption. In order to reach the vehicles’ fuel saving potential of each vehicle, the proper driving technics must be concerned. Therefore, the experiment will be conducted by testing Toyota Prius (generation 3) and Toyota Altis (generation 11) in real-world traffic. To cover the variations in traffic conditions, the experimental routes: inner city, suburban and highway traffic, are selected to represent the major commutations and functions. For driving behavior, the tests will be conducted by four experienced drivers driving in normal and aggressive styles. Acceleration noise will be applied to indicate drivers’ aggressive levels.
2015-03-30
Technical Paper
2015-01-0104
Raksit Thitipatanapong, Sanya Klongnaivai
Nowadays, satellite navigation technologies have involved more in vehicle application. In previous study, the accuracy of navigation system were effect to the level of application such as driving behavior, lane-by-lane detection. The famous GPS (Global Positioning System) form United State has been deployed for years. However, other satellite navigation system also available such as Russian GLONASS or Chinese Beidou or Regional QZSS from Japan. The combination of multiple satellite system could increase availability and accuracy of navigation system. ears In this study, the commercial satellite navigation receivers has been evaluated, two u-blox M8N were set into multi-GNSS (1) [GPS+Beidou+QZSS] and (2) [GPS+GLONASS+QZSS] and a u-blox 6H as reference for GPS. All receivers were installed in experimental vehicle to test in urban road, sub-urban road and highway. The 2D accuracy were evaluated.
2015-03-30
Technical Paper
2015-01-0083
Thanh Cong Nguyen, Jin Yao
In this paper, the proposed design structure matrix (DSM) is applied to modeling the collaborative design of the automotive powertrain system. A task of the whole design process is divided into several levels and some specific design tasks. And then, basing on DSM principle to set up the its flow diagram. By analyzing and refactoring DSM matrix to eliminate the unnecessary iterative design process, the design process is optimized to shorten the development cycle. Keywords: collaborative design ; design structure matrix; automotive powertrain
2015-03-30
Technical Paper
2015-01-0108
Qingdong Hou, Wenjie Qin, Zhe Yu, Mu Tang, Yang Ran
With the increasing of ride comfort requirements for modern vehicles, the noise generatingbefore and after the windshield wiper reverses direction becomes more noticeable.In this paper,the impacts of some factors---the preload of wiper lever spring, the torsional stiffness of blade neck and the flexible connection between the wiper arm and the wiper lever on the vibration excitation appliedto the front windshield are analyzed based on the multi-body dynamic modelof wiper system (includingthe crank pivot, the four linkage mechanism, the wiper blades, the wiper arms and the windscreen glass) which has been established by taking elastic contact between the wiper blade and the front windshieldinto consideration.
2015-03-30
Technical Paper
2015-01-0107
Sunny NARAYAN
Analysis of noise level from engines is important from point of view of customer satisfaction .Accurate prediction of noise is important for planning,design and target setting decisions for meeting customer satisfaction goals.In this work an analytic model has been described to break diesel engine noise data into various components in order to plan a strategy for condition monitoring of engine.
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
2015-01-0109
Sontipee Aimmanee
For these recent years, piezoelectric energy harvesting has been a very popular research topic. Piezoelectric materials are used to harvest wasted mechanical energy from ambient environment and supply electrical energy via their electromechanical coupling properties. However, there has been no research, which explicitly studies the influence of environmental factors on the performance of energy harvesting from the piezoelectric materials in automotive applications, especially in the engine compartment where temperature is varied with engine operating conditions. The main purpose of this research was to investigate thermal effects on electrical energy harvested from a laminated piezoelectric device in engine compartment. In this research THin Layer UNimorph Ferroelectric DrivER (THUNDER), a type of laminated piezoelectric devices, was studied. Three configurations of THUNDER devices i.e. 6R, 7R, and 8R were tested.
2015-03-30
Technical Paper
2015-01-0106
Zhe Yu, Wenjie Qin, Qingdong Hou, Mu Tang, Yang Ran
Wiper noise generated in the process of wiping is one of the main influence factors affecting the driving comfort. Since the dynamic pressure of the contact between a blade and a windshield glass is difficult to be simulated or measured, which make it is extremely particularly difficult to predicte the degree of the wiper noise. To solve this problem, in this paper, as the reversal noise problem of a passenger-vehicle windscreen wiper system is concerned, the system dynamic models of the both wipers on the sides of the driver and copilot were built on the basis of consideration of the blade deformation and the elastic contact between the blades and the windscreen glass, which including the crank pivot, the four linkage mechanism, the wiper blades, the wiper arms and the windscreen glass.
2015-03-30
Technical Paper
2015-01-0105
Perakit Viriyarattanasak
Farm trucks, otherwise known as a light truck, is a vehicle used to transport agricultural products from farmers in the farm fields. Originally, farm trucks are assembled by local truck workshops using used parts of cars scrapped from abroad. It causes a serious problem in terms of quality and safety, since conventional truck garages are lack of correct engineering principles in the assembly and there has a potential risk of accidents that may occur during use. This study is focused on enhancement of life quality and safety of farm truck users from different regions in Thailand. One problem encountered in the operation is that a clutch case to cover the flywheel-clutch-module, consisting of the engine flywheel and the clutch, is mostly fabricated without applying engineering understanding. This leads to time-consuming trial and errors manufacturing process and overweight parts.
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