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Viewing 31 to 60 of 8756
2015-03-30
Technical Paper
2015-01-0116
Panuwat Kangkaya
The fuel consumption in transportation field is nowadays an important reason to realize with contribute to performance of engine for powered the motor vehicle. In particular, the total energy consumption in the world depends on the remaining fossil fuels. Using new development technologies and renewable oxygenated fuels are considered the most suitable solution for sustainable future.
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
2015-01-0118
Pol-Ake Budsayahem
Today's world focus on the environment is major problem because in today's cars took to the streets for a lot which causes of carbon dioxide emitted. If the engine is running at full capacity, it is another way to reduce it. Features of the lubricant is another factor that will help the engine run more efficiently and can prolong the engine. The research focuses on the analysis of determination the nature of wear. Particle shape of the elements, measure the condition of the oil to see the degradation of the lubricant and the condition of dirt contamination, which is part of the engine, resulting in a faster degradation. Finally analyze the outcome of figure is that the various elements which affect the engine in any field.
2015-03-30
Technical Paper
2015-01-0122
Phiranat Khamsrisuk
Nowadays the important problem of using Automobile vehicle is the cost of gasoline fuel that is very higher than its cost in ten year ago. When fossil fuel’s demand is increase so its cost is increase too, but it is opposed to its quantity and it will not enough to human’s demand. To find an alternative fuel, ethanol is the best answer because ethanol is distilled easily, not expensive and can be manufactured in Thailand. Consequently, research on using internal combustion engines fuelled with ethanol is so necessarily. This research has main objective that to study about the engine that ethanol can be used for alternative energy. The experimentally investigated the effect ignition timing in Direct Injection Spark Ignition engine (DISI) using an ethanol blend by altering the timing angle with respect to gasoline use regarding the output performance parameters such as power and efficiency. We also determined the energy distribution of the engine.
2015-03-30
Technical Paper
2015-01-0111
Sarapon Thitipatanapong, Sathaporn Chuepeng, Poranat Visuwan
Encouraging the use of alternative fuels available in Thailand is mainly due to fuel crisis within the past few decades. The government has recently drafted a renewable energy long-term plan to increase biofuel production. This has emboldened biodiesel to be used as fuel for agriculture and transportation, in particular. Diesel engines are promising for reducing carbon dioxide emissions related fuel energy consumption. Ordinarily, diesel combustion generates particulate matter (PM) in terms of smoke opacity and nitrogen oxides (NOx) in trade-off relationship. However, advanced techniques for engine technology and after-treatment devices have been abundantly developed to mitigate these hindrances. To break the trade-off emissions, an example technique is to fuel engines with biodiesel incorporated with exhaust gas recirculation (EGR). Among available options, nonthermal plasma (NTP) is one of the techniques that charges exhaust gas with high power electricity to reduce some emissions.
2015-03-30
Technical Paper
2015-01-0115
Nuwong Chollacoop, Manida Tongroon, Mongkon Kananont, Amornpoth Suebwong, Peerawat Saisirirat, Siamnat Panassorn, Paritud Bhandhubanyong
The effects of high quality biodiesel, namely, partially Hydrogenated Fatty Acid Methyl Ester or H-FAME, on 50,000km on-road durability test of unmodified common-rail vehicle have been investigated. Brand new Thailand popular common-rail light duty vehicle, Isuzu D-Max Extend cab, equipped with 4JK1-STD engine (DOHC 4-cylinder 2.5L, M/T 4x2, Euro III emission) was chosen to undergo on-road test composed of well-mixed types of mountain, suburb and urban road conditions over the entire 50,000km. Jatropha-derived high quality biodiesel, H-FAME, conforming to WWFC (worldwide fuel charter) specification, was blended with normal diesel (Euro IV) at 10% as tested fuel. Engine performance (torque and power), emission (CO, NOx, HC+NOx and PM), fuel consumption and dynamic response (0-100km acceleration time and maximum velocity) were analyzed at initial, middle and final distance; whereas, used lube oil analysis was conducted every 10,000km.
2015-03-30
Technical Paper
2015-01-0112
Mohd Radzi Abu Mansor, Nik Muhammad Hafiz, Chun Hyiin Tan, Wan Mohd Faizal Wan Mahmood
The development of a more efficient engine is an important agenda in the automotive industry and the shrinking source of fossil fuel drives the search for alternative fuels as a replacement for gasoline in car engines. Some of the problems faced by a direct injection engine used today is heat loss to the walls of the combustion chamber. The objective of the study is to determine the combustion characteristics such as the combustion temperature, enthalpy, total energy and local heat flux in a constant volume vessel which uses direct injection for various alternative fuels like methane, propane, hydrogen and compressed natural gas. Variables such as the mass flow rate of air, air temperature, ambient pressure and type of fuel are studied to determine the heat loss which occurs so that this data can be used in future researches that involve more specific applications. This study is done using computer simulations with the aid of a computational fluid dynamics software; ANSYS Fluent.
2015-03-30
Technical Paper
2015-01-0117
Simon A. Perez, Henrique J. Perez
We have a new engine development (US 5,927,236, pending 13/109,505 approved will be issued in December, PCT/IB2012/001882) that in addition to being a true Atkinson, 1 L admission/compression, 2 L expansion/exhaust with all the benefirs of reduced pumping loses also provides a positive torque beginning at 15º BEFORE tdc and at tdc we have a positive torque that is equivalent to the conventional engines torque at 16º AFTER tdc. This feature in addition to solving preignition and nock issues is the KEY to making HCCI a commercial success.
2015-03-30
Technical Paper
2015-01-0121
Kanit Manatura, Van Men Truong, Chiu Chou Lin, Jau-Huai Lu, Keng Tung wu
Syngas is one of the gaseous alternative fuels that can be produced by gasification of solid fuels such as coal and biomass. The quality of syngas production depends on the gasification operating conditions such as temperature, pressure, residence time, gasifying agent, air fuel ratio, equivalence ratio and size of feedstock. Many applications of syngas may be included with hydrogen production in refineries, methanol from the chemical industry, electricity from the combustion process and the fuel for internal combustion engines. In this study, the effects of the syngas addition of 10%, 30% and 50% (by volume) with diesel fuel on the combustion and emission characteristics of a dual syngas-diesel engine are investigated. The engine was conducted on 6-cylinder, 6.014 L, naturally aspirated, water-cooled, no EGR, direct-injection HDDE (Heavy Duty Diesel Engine) of model year 1992 (Hino W06E) and injection timing of 8 degree CA (BTDC).
2015-03-30
Technical Paper
2015-01-0119
Reywat Aramsiriwat, Kitti Iempremjit, Ronnachart Munsin, Yossapong Laoonual, Sumrerng Jugjai, Manida Tongroon
The purpose of this study is to investigate the startability characteristics of a single cylinder direct injection compression ignition engine fueled with ethanol blended with ignition improvers as fuels. The engine is modified to increase compression ratio from 18:1 to 23:1 and 28:1. Glycerol ethoxylate and biodiesel from palm oil methyl ester (POME) are considered as ignition improver blended with ethanol in various concentrations in this study. Glycerol ethoxylate is more effective on ignition quality improvement than POME. In-cylinder pressure and engine speed are key parameter to explain the startability characteristics and categorize them into four modes. The results show that increasing of ignition improver concentration enhances startability and improve IMEP due to combustion promotion.
2015-03-30
Technical Paper
2015-01-0088
Suresh Kumar Kandreegula, Naveen Sukumar, Sunil Endugu, Umashanker Gupta
To compete with the current market trends there is always a need to arrive at a cost effective and light weight designs. For Commercial Vehicles, an attempt is made to replace existing Gear Shift Fork from FC Iron to ADC without compromising its strength & stiffness, considering/bearing all the worst road load cases and severe environmental conditions. ADC has good mechanical and thermal properties compared to FC Iron. Feasible design has been Optimized within the given design space with an extra supporting pad for load distribution. Optimization, Stiffness, Contact pattern has been done using Optistruct, Nastran & Ansys for CAE evaluation. A 6-speed manual transmission is used as an example to illustrate the simulation and validation of the optimized design. Advanced linear topology optimization methods have been addressed as the most promising techniques for light weighting and performance design of Powertrain structures.
2015-01-14
Technical Paper
2015-26-0127
Gaurav Paliwal, Naveen Sukumar, Umashanker Gupta, Saurav Roy, Hemantkumar Rathi
Abstract 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. Powertrain mounting system must perform many functions. First and foremost, the mounting system must maintain & control the overall motion of the powertrain, to restrict its envelope reasonably, thereby avoiding damage to any vehicle component from the potential impact. This requires the mount to be stiff. Second the mount must provide good vibration isolation to have a comfortable ride to the vehicle occupant. This requires the mount to be soft.
2015-01-14
Technical Paper
2015-26-0128
MR Vikram, Ramesh Patil, Shashidhar Chattanahalli, Vijay H Meti
Abstract Automotive manufacturers are facing unprecedented cost challenges across globe. Market requirement has become very competitive with increased demand for higher performance and value engineering. This is encouraging automotive manufacturers to develop dampers with local suppliers, as there is a huge component cost advantage and also logistic cost savings. However, in emerging markets, supplier capability to develop the component for solving particular NVH problem of OEM is not matured as compared to developed market suppliers. The challenge for auto makers is to develop suppliers who can provide proper performance and durability, while at the same time providing lower cost components. This paper gives an overview of the challenges in the development process to develop a competitive torsional vibration damper for rear wheel drive vehicle to reduce boom noise and vibration.
2015-01-14
Technical Paper
2015-26-0125
Sambhaji Keshaw Jaybhay, Sudhakara Naidu, Prasanna Nagarhalli, J Saiprasad
Abstract This paper discusses various fruitful iterations / experiments performed to reduce air flow induced noise without compromising on total air flow requirement for thermal comfort and ways to avoid heat ingress inside the bus. Also the paper discusses the devised process for noise reduction through front loading of computer aided engineering and computational fluid dynamics analysis. Air conditioning buses in light commercial vehicle (LCV) segment is growing market in India, especially for applications like staff pick-up and drop, school applications and private fleet owners. The air-conditioning system is typically mounted on bus roof top and located laterally and longitudinally at center. It is an easiest and most feasible way to package air conditioning system to cater the large passenger space (32 to 40 seats) with the conditioned air. This makes air conditioning duct design simple and commercially viable.
2015-01-14
Technical Paper
2015-26-0126
Prince Shital, Chiranjit Ghosh, Harveen Talwar, Avnish Gosain, Praneet Shanker Dayal
Abstract Three-cylinder Engine without balancer shaft is a recent trend towards development of lightweight and fuel-efficient powertrain for passenger car. In addition, customer's expectation of superior NVH inside vehicle cabin is increasing day by day. Engine mounts address majority of the NVH issues related to transfer of vibration from engine to passenger cabin. Idle vibration isolation for a three-cylinder engine is a challenging task due to possibility of overlapping of Powertrain's rigid body modes with engine's firing frequency. This Overlapping of rigid body can be avoided either by modifying mount characteristic or by changing the position of mounts based on multi-body-dynamics (MBD) simulation. This paper explains about two types of engine mounting system for a front-wheel drive transversely mounted three-cylinder engine. The base vehicle was having three-point mounting system i.e. all three engine mounts were pre-loaded.
2015-01-14
Technical Paper
2015-26-0132
Ajay Paul John, Vikas Kumar Agarwal, Prashant Bhavsar
Abstract High fuel efficiency, low ownership/ maintenance cost and favorable driving climate are the major reasons for the increasing demand for low-power commuter motorcycles and scooters, particularly in developing countries like India, Brazil and China. Noise Vibration and Harshness (NVH) has now become a new subject for the battle between competing manufacturers in attracting customers. Valvetrain noise is quite significant in the engines of these cost gasoline vehicles as they don't incorporate a Hydraulic Lash Adjuster (HLA) to keep the manufacturing costs less. The aim of this study was to understand how the cam ramp velocity and height affects the noise generated by the engine and what effect they have on its performance.For this study, a small scooter gasoline engine with an Over Head Camshaft (OHC) and a rocker arrangement with a roller-follower was considered.
2015-01-14
Technical Paper
2015-26-0129
Kapil Gupta, MR Vikram, Eugenio Manta
Abstract A turbocharger unit mainly consists of a centrifugal compressor and a turbine coupled together by a solid shaft. This is employed to boost the charge air pressure of the engine. Turbocharging in modern diesel and gasoline engines have become a common and essential operation to result higher power outputs, lower emissions, improved efficiency and refinements from a similar capacity of naturally aspirated engines. The automotive turbocharger system is a source of synchronous and asynchronous noises that should be eliminated or reduced for passenger comfort. Subjectively, a high whistle noise was audible in the passenger cabin during in a mid-rpm range drive in all gears in a 4 cylinder diesel vehicle. Objective noise and vibration data confirm the issue as unbalance whistle. A detailed study has been carried out to identify the source and radiating part of the unbalance whistle noise generated in a 4 cylinder diesel engine running a passenger car.
2015-01-14
Technical Paper
2015-26-0130
Pradeep Kumar Singh, Sai Aditya Raman K
Abstract Gear noise and vibration in automobile transmissions is a phenomenon of great concern. Noise generated at the gearbox, due to gear meshing, also known as gear whine, gets transferred from the engine cabin to the passenger cabin via various transfer paths and is perceived as air borne noise to the passengers in the vehicle. This noise due to its tonal nature can be very uncomfortable to the passengers. Optimizing micro-geometry of a gear pair can help in improving the stress distribution on tooth flank and reducing the sound level of the tonal noise generated during the running of the gearbox when that gear pair is engaged. This technical paper contains the study of variation in noise level in passenger cabin and contact on tooth flank with change in micro-geometry parameters (involute slope and lead slope) of a particular gear pair. Further scope of study has been discussed at the end of the paper.
2015-01-14
Technical Paper
2015-26-0137
Himanshu Agrawal, Abhishek Arun Kakade, Arun Kumar Singh, Sandeep N Shetty
Abstract Fan is generally used for cooling of alternator and an undesirable side effect of these fans is generation of flow induced noise. With stricter regulations and growing importance on acoustic comfort in present day market, it's very important to address flow induced noise problems early in product development stage. With physical testing, it would not be possible to get information on source strengths thus, limiting its usage. Whereas simulation on the other hand would be able to provide source strengths, directivity pattern and source ranking. This paper focuses on numerical simulation of alternator's fan for prediction of air- borne noise. For this purpose, Computational Fluid Dynamics (CFD) based transient analysis is performed with high fidelity turbulence model using commercial software package, ANSYS Fluent. Ffowcs Williams and Hawkings (FW-H) model is used for modeling sound propagation.
2015-01-14
Technical Paper
2015-26-0135
Kalpesh Mistry, Nitin Badhe, Steve Fisher
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). One of the most widely and accepted practice in high frequency NVH is SEA technique to assess and optimize acoustic sound pack for Air Borne Noise (ABN) in the range of 400 Hz to 6300 Hz typically for Powertrain and Tyre Patch Noise Reduction. As Prof. Lyon states that “The most obvious disadvantage of statistical approaches is that they give statistical answers, which are always subject to some uncertainty” [1]. It is always challenge for SEA engineer to get correlation for full vehicle level model for Tyre Patch Noise Reduction (TPNR) and Powertrain Acoustic Transfer Function (PT ATF) to acceptable level. Appropriate correlated SEA model is developed and few challenges associated with SEA modeling are also discussed in this paper.
2015-01-14
Technical Paper
2015-26-0134
Jayant Sinha, Ajit Kharade, Shrihari Matsagar
Abstract An interior sound quality is one of the major performance attribute, as consumer envisage this as class and luxury of the vehicle. With increasing demand of quietness inside the cabin, car manufactures started focusing on noise refinement and source separation. This demand enforces hydraulic power steering pump to reduce noise like Moan and Whine, especially in silent gasoline engine. To meet these requirements, extensive testing and in-depth analysis of noise data is performed. Structured process is established to isolate noises and feasible solutions are provided considering following analysis. a) Overall airborne noise measurement at driver ear level (DEL) inside the cabin using vehicle interior microphone.b) Airborne and Pressure pulsation test by sweeping pump speed and pressure at test bench.c) Waterfall analysis of pump at hemi anechoic chamber for order tracking and noise determination.
2015-01-14
Technical Paper
2015-26-0141
Ravishastri Gadasu, Anshul Khatri, Aashish Parmar
Abstract With increase in product diversity in passenger car market, the need for NVH comfort has gained very strong foothold in every segment. This needs in depth analysis for limiting the noise at part level. Radiator Fan Module is one of such part which contributes to Cabin comfort in major way. In this paper, author is focusing on designing of RFM (Radiator Fan Module) in order to have low noise. Primary objective of RFM is to meet Heat rejection requirement with optimized air flow. Radiator Fan is primarily responsible for meeting air flow requirement within specified noise limit. For flow inducing components like Radiator Fan, there is always a trade-off between the functional requirement and the noise from various sources (Electrical / Mechanical / Flow). Design of Fan blades and Motor Support ribs in RFM is critical to improve Flow noise, i.e. Air cutting noise.
2015-01-14
Technical Paper
2015-26-0140
Milind Ambardekar, Adatiya Yogesh, Sudhakara Naidu
Abstract Production variations of a heavy duty truck for its vibrations were measured and then analyzed through an Ishikawa diagram. Noise and Control factors of the truck idle shake were indentified. The major cause was found to be piece to piece variations of its power-train (PT) rubber mounts. To overcome the same, a new nominal level of the mount stiffness was sought based on minimization of a cost function related to vibration transmissibility and fatigue damage of the mounts under dynamic loadings. Physical prototypes of such mounts were proved to minimize the variations of the driver's seat shake at idling among various trucks of the same design. These learning's are useful for design of various subsystems or components to refine the full vehicle-Noise Vibration Harshness (NVH) at the robust design level.
2015-01-14
Technical Paper
2015-26-0139
Pradeep Kumar Singh
Abstract Noise generated in the driveline is mainly transferred inside the passenger cabin through air (air borne noise) and through the vehicle body structure, engine mounts, cables etc. Source of the noise generation in the vehicle is mainly through the engine fluctuation (engine combustion excitations). Any change in the engine characteristics results in the change in passenger cabin noise. Also, influence of the vehicle body structure due to change in material properties also affects the NVH performance. This technical paper explains the effect of change in engine characteristics as well as change in the transfer path (material property) on the NVH performance of the gearbox and subsequently the NVH performance of vehicle.
2015-01-14
Technical Paper
2015-26-0122
Herman Van der Auweraer, Karl Janssens, Fabio Bianciardi, Filip Deblauwe, Kumaraswamy Shivashankaraiah
Abstract Certification of vehicle noise emissions for passenger vehicles, motorcycles and light trucks is achieved by measuring external sound levels according to procedures defined by international standards such as ISO362. The current procedure based on a pass-by test during wide-open throttle acceleration is believed far from actual urban traffic conditions. Hence a new standard pass-by noise certification is being evaluated for implementation. It will put testing departments through their paces with requirements for additional testing under multiple ‘real world’ conditions. The new standard, together with the fact that most governments are imposing lower noise emission levels, make that most of the current models do not meet the new levels which will be imposed in the future. Therefor automotive manufacturers are looking for new tools which are giving them a better insight in the Pass-by Noise contributors.
2015-01-14
Technical Paper
2015-26-0123
Yogesh Surkutwar, Mahesh Anand Patwardhan, Nagesh Voderahobli Karanth, Atul Gaikwad
Abstract The work presented in this paper deals with the use of combined Computer Aided Engineering (CAE) and experimental testing approach for reducing engine noise. The paper describes a systematic approach for giving solutions to the structure borne engine noise related problems. Noise Source Identification (NSI) was carried out on diesel engine to identify noise radiating sources, ranking of noise sources was carried out and contribution of individual engine component in radiated Sound Power Level (SWL) was computed. Detailed Finite Element Model (FEM) of engine assembly was developed and model was correlated in terms of natural frequencies and transfer functions by performing modal testing. Correlated FEM was used for predicting surface vibration velocities under various engine speeds and loading conditions in frequency domain. Velocities so predicted in frequency domain were used as an input for SWL prediction using Boundary Element Method (BEM) approach.
2015-01-14
Technical Paper
2015-26-0146
Dhanashri Ravikiran Desai, Suhas Suryawanshi, Bhalchandra Deshmukh
Abstract Developing countries like India is now highly relying on the alternate source of power generation to have uninterrupted power supply for their economic development. Diesel Power generator is one of the solutions in meeting the uninterrupted power requirement. In India, Power generating sets are having stringent emission norms and also the present government policies of removing subsides from Diesel fuel adding the additional burden on operating cost. As such researcher has a tough task to design the product considering the stringent requirement of legislation and performance. The main focus of this research work is to address performance necessities and the noise legislation. The detail methodology has been laid down to analyze and optimize performance and noise of Diesel Generator with respect to cooling system. Cooling fan with drive arrangement has been selected to study the canopied Diesel Generator performance and overall noise emission.
2015-01-14
Technical Paper
2015-26-0154
Anand Ramalingam, Saravanakumar Thangamani
Abstract This paper discusses about the Flange design study carried out in Fuel Delivery Module (FDM) for meeting out contradictory requirements of robustness and crash worthiness. FDM is assembled in the fuel tank with flange covering the tank opening, and swirl pot assembly comprising fuel pump attached to flange through two steel struts. During crash, FDM undergoes sudden deceleration. Due to inertia, swirl pot assembly creates bending moment in the flange-strut interface. At such adverse condition, flange should not exhibit crack on the sealing side, as it might expose fuel in the fuel tank to the atmosphere. To ensure safety, flange-strut interface in the bottom side of flange is designed with higher stress concentration factor. So, the struts along with swirl pot assembly will break away from flange during crash without creating crack in the flange sealing faces.
2015-01-14
Technical Paper
2015-26-0214
Sivanandi Rajadurai, Guru Prasad Mani, Kavin Raja, Sundaravadivelu Mohan, Balaji Manivannan
Abstract Automotive exhaust system components are exposed to many types of vibrations, from simple sinusoidal to maximum random excitations. Computer-Aided engineering (CAE) plays an inevitable role in design and validation of hot vibration shaker assembly. Key Life Test (KLT), an accelerated hot vibration durability test, is established to demonstrate the robustness of a catalytic converter. The conditions are chosen such a way that the parts which passes key life test will always pass in the field, whereas the parts which fail in the key life test need not necessarily fail in the field. The hot end system and the test assembly should survive in these aggressive targeted conditions. The test fixture should be much more robust than the components that it should not fail even if the components fail. This paper reveals the computational methodology adopted to address the design, development and validation of the test assembly.
2015-01-14
Technical Paper
2015-26-0220
Sachin W. Thor, Shriniwas Chippa, Abhijit Majage
Abstract An automobile rear view mirror is attached at the side of the vehicle which is used to provide clear vision outside the vehicle. In the running condition of vehicle, various vibrations occur and are transferred to the mirror which may disturb driver's rear view. Since the vibration of mirror is related to safety consideration, it becomes essential to minimize it. Vibration analysis is very much important for the successful design and development of new parts in automobile. In present work, Vibration analysis of existing design of outside rear view mirror is investigated through numerical model using Finite Element Method (FEM). Furthermore, these results are verified through experimental work. From the modal analysis, it was found that the natural frequency of outside rear view mirror is less than the excitation frequency (Engine & Road excitation). However, to avoid resonance and for a safe design the natural frequency must be greater than these excitation frequencies.
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