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Viewing 1 to 30 of 23358
2015-01-14
Technical Paper
2015-26-0126
Prince Shital, Chiranjit Ghosh, Harveen Talwar, Avnish Gosain, Praneet Shanker Dayal
Three-cylinder Engine without balancer shaft is a recent trend towards development of lightweight and fuel-efficient power train for passenger car. In addition of that, customer's expectation of superior NVH inside driver 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 Power train’s rigid body modes with engine's firing frequency. This Overlapping of rigid body modes of power train 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
2015-26-0240
Avinash Dhole, Chetan Raval, Rishi Shrivastava
In commercial vehicles which generally have large capacity fuel tank, sloshing of fuel and its effect on the tank structure is very important aspect during fuel tank design. Dynamic pressures exerted by the fuel on baffles, end plates and tank shell during sloshing can lead to failures and fuel leakage problems. Fluid structure interaction simulation of automotive fuel tank sloshing and its correlation with physical test is demonstrated in this study. During physical sloshing test of 350 L fuel tank, cracks were observed on center baffle and spot weld failures developed on fuel tank shell. Same sloshing test was simulated for one sloshing cycle using fluid structure interaction approach in LS Dyna explicit FE solver. Water was used instead of fuel. Mesh free smoothed particle hydrodynamics (SPH) method is used to represent water as it requires less computational time as compared to Eulerian or ALE method.
2015-01-14
Technical Paper
2015-26-0064
Asmita Manwatkar, Prasad S Phale, Moqtik Ashok Bawase, Mangesh Ramesh Saraf
Used oil analysis plays an important role in the field of engine development, considering that it can give brief idea about performance of lubricant/ oil being used, its compatibility with the system under considerations. Presently, regular testing are done like elemental analysis using ICP which can give idea about wear elements and additive elements. But it does not give information on morphological characterization of particles. In present work, Scanning Electron Microscopy technique with EDAX detector is used for characterizing the used oil. Oil is filtered on suitable paper and the particles collected on paper are analyzed. This gives the information on morphology and size of particles, their elemental analysis and mapping so that the sources can be judged. Size of wear metal particle is very important factor as even few bigger size particles are more detrimental than large number of smaller particles.
2015-01-14
Technical Paper
2015-26-0159
Tripti Jain, Tanvee Adhikari
During vehicle development, numerous tests are done to ensure safety & durability of the vehicle. One such test prescribed by regulation (IS 12009:1995) is side door intrusion test (SDIT). This test evaluates strength requirement of a side door of passenger cars to minimize the safety hazards caused by intrusion into passenger compartment in a side impact accident viz., initial, intermediate and peak crush resistance. In current scenario, the passenger car manufacturers are striving hard on cost reduction by reducing the development cost. Thus, prediction of the exact vehicle performance before its prototype stage is vital and can be achieved with the help of Computer Aided Engineering (CAE) During the SDIT, the load is applied to the door in inward direction. This impact force is resisted by the door assembly, while door is pivoted at door latch and hinge.
2015-01-14
Technical Paper
2015-26-0235
Raju P Soudatti, Ragunathan Amarnath, Ramesh Harish
This paper deals the verification & Validation of passenger seat of buses for life cycle requirement. Through various methodologies adopted from Data collection, CAE verification and physical validation to verify the seat in virtual environment. Generally it is observed that in City Buses most of the time Passenger seat leg mounting area failures occurs in buses used for typically more than 3years. This fatigue failure doesn't get captured in either Anchorage test or limited vibration test. Passenger seats durability should be equal to vehicle life which is 10L or 12 Years of life span. Testing on Physical vibration (Rig) machine is time consuming and costly most of the time Machine availability for testing will be an issue to validate alternate seat proposals. There is need to establish a correlation between Physical testing and CAE simulation so that alternate proposals can be easily and quickly verified using CAE alone.
2015-01-14
Technical Paper
2015-26-0024
Sivanesan Murugesan, Lakshmikanthan Chinnasamy, Abhijeet Patil
Abstract Appropriate test cycle is required for engine testing. To do so, a new methodology is developed for deriving Engine Test Cycle based on real world duty cycle. Transient speed and load is to be collected from the functional engine on the field. The duty cycle for cyclic operation will be developed from the actual transient speed and load conditions. An iterative process and the comparison of chi-square statistical data is used to categorize typical microtrips, segments of engine operation collected during performance of certain activities. Different microtrips of all activities were combined together to make up a cycle of operation and test cycle as well. These data's are compared to statistical data which is used to illustrate the raw data. On successful comparison, the transient test cycle is validated on the test bed. To facilitate further engine testing, the cycle is transformed into a schedule of torque and speed points at One second intervals.
2015-01-14
Technical Paper
2015-26-0188
Prashant Khapane, Uday Ganeshwade, Kevin Carvalho
Vehicle water wading capability refers to vehicle functional part integrity (e.g. engine under-tray, bumper cover, plastic sill cover etc.) when travelling through water. Wade testing involves vehicles being driven through different depths of water at various speeds. The test is repeated and under-body functional parts are inspected afterwards for damage. Lack of CAE capability for wading equates to late detection of failure modes which inevitably leads to expensive design change, and potentially affects program timing. It is thus of paramount importance to have a CAE capability in this area to give design loads to start with. Computational fluid dynamics (CFD) software is used to model a vehicle travelling through water at various speeds. A non-classical CFD approach was deemed necessary to model this. To validate the method, experimental testing with a simplified block was done and then verified with CFD modelling.
2015-01-14
Technical Paper
2015-26-0075
Ashwin Subramanian Kaundinya, Yogesh S Thipse, Vinayak Shivalink Sagare, Neelkanth V Marathe
Abstract In the quest towards meeting stringent emission norms as well as robust performance requirements, there is an ever growing need to continually research into and develop high caliber engines. This necessitates handling huge amounts of generated test data that monitors a multitude of variables like engine speed, combustion chamber pressure, engine load and the like. Further, in order to establish the scalar engine performance parameters like efficiency, Brake Mean Effective Pressure, Indicated Mean Effective Pressure, P-V diagram, post processing is required to be done on the measured test data that involves complex calculations like numerical integration and other mathematical operations on a grand scale. In order to meet this objective, the authors hereby showcase a knowledge based algorithm that integrates and streamlines the entire procedure from handling of the huge test data to performing all the calculations in order to arrive at the scalar engine performance parameters.
2015-01-14
Technical Paper
2015-26-0160
Adria Ferrer, Stefanie de Hair, Oliver Zander, Rikard Fredriksson, Swen Schaub, Frederic Nuss, Marie Caspar
Pedestrians and cyclists are the most unprotected road users and their injury risk in case of accidents is significantly higher than for other road users. Though the level of safety for pedestrians, as established through Euro NCAP and others, has significantly increased over the last years, currently still more than 20% of road fatalities correspond to pedestrians. The test procedures and assessment methods for pedestrian safety show potential for further improvement and thus should be adjusted accordingly. The understanding of the influence and sensitivity between important variables describing a pedestrian crash is key for the development of more efficient and reliable safety systems. This paper reflects the related work carried out within the AsPeCSS project.
2015-01-14
Technical Paper
2015-26-0237
Rajendra More, Darshan Vachhani, Chetan Raval
Abstract Strength and durability of commercial vehicle structure is of prime importance to users while quicker time to market and least material cost are demands of competitive world. This requires assessment not just with simplistic loadcases but robust and accurate predictions closely co-relating real proving ground conditions. This paper demonstrates systematic approach of first road load predictions using MBD model, then stress analysis using FE model and finally life prediction using fatigue solver. MBD model was built using flex body, air suspensions with rigid links and tires with FTire characteristics. Same model ran on various virtual proving grounds and load history at various joints were extracted. Then inertia relief stress analysis with unit loads were carried out in Nastran and output stresses were mapped against load history in fatigue solver.
2015-01-14
Technical Paper
2015-26-0192
Sourabh Shrivastava, Padmesh Mandloi
Simulations can provide comprehensive understanding of process occurring inside an IC engine and its relevant cooling system like engine water jacket etc. Thus it can help in improving the thermal efficiency of the system. This paper describes and validates ANSYS CFD based automated approach that is developed to perform thermal analysis of an IC engines by modeling both, IC engine and its cooling system. Since underline physics of an in-cylinder combustion process and heat transfer through cooling jackets have very different time scales, discussed methodology uses a coupled approach to solve the two problems. This involves running two different CFD simulations, in coupled manner till cyclic-steady state temperature distribution is obtained on the cylinder head, namely : One, as a transient in-cylinder simulation to model combustion in the diesel engine that starts from IVC and ends at EVO.
2015-01-14
Technical Paper
2015-26-0216
Ramesh Babu Pathuri, Prasanna Nagarhalli
Abstract Upfront in a vehicle program, sizing of front end cooling module i.e. Condenser Radiator Fan Module (CRFM) and front grille opening is vital hence simulation tools like 1D have gained tremendous importance. This paper focuses on the modeling and analyzing performance behavior of engine cooling system using 1D simulation tool and also discusses the correlation of simulated results with test results. 1D model of engine cooling system is developed by inputting all necessary geometrical and performance data of all components (radiator heat load, coolant pipe geometry, CRFM, pump, thermostat etc.) with necessary assumptions. Air flow rates used on heat exchangers are predicted in 3D Computation Fluid Dynamics (CFD) analysis. First isothermal coolant circuit is modeled and coolant flow correlation is achieved to build confidence in modeling.
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.
2014-12-22
WIP Standard
AS39029/123
To accommodate high current applications for the AS50151 AS345X Series connectors and AS95234 connectors.
2014-12-22
WIP Standard
AS39029/124
To accommodate high current applications for the AS50151 AS345X Series connectors and AS95234 connectors.
2014-12-22
WIP Standard
AIR6508
This SAE Aerospace Information Report (AIR) provides a performance station designation system for unconventional propulsion cycles and their derivatives. The station numbering conventions presented herein are for use in all communications concerning propulsion system performance such as computer programs, data reduction, design activities, and published documents. They are intended to facilitate calculations by the program user without unduly restricting the method of calculation used by the program supplier. The contents of this document will follow AS755 where applicable.
2014-12-18
Article
Teledyne LeCroy has added unique measurement and graphing capabilities to its CAN flexible data-rate serial trigger and decode solution.
2014-12-17
Article
HBM has introduced three new amplifier modules for its SomatXR data acquisition system.
2014-12-12
Article
With the actuator sensor manipulation (ASM) box, FEV Group provides a powerful tool for manipulation of the signal exchange between actuators and an engine control unit .
2014-12-12
Article
PC-DMIS 2014.1 from Hexagon Metrology is a significant update of measurement software used for the collection, evaluation, management, and presentation of manufacturing data.
2014-12-12
Standard
AS755F
This SAE Aerospace Standard (AS) provides a performance station designation system for aircraft propulsion systems and their derivatives. The station numbering conventions presented herein are for use in all communications concerning propulsion system performance such as computer programs, data reduction, design activities, and published documents. They are intended to facilitate calculations by the program user without unduly restricting the method of calculation used by the program supplier. The contents of this document were previously a subset of AS755E. Due to the growing complexity of station numbering schemes and an industry desire to expand nomenclature descriptions, a decision was made to separate the “station numbering” and “nomenclature” contents of AS755 into two separate documents. AS755 will continue to maintain standards for station numbering. SAE Aerospace Standard AS6502 will maintain standards for classical nomenclature moving forward.
2014-12-10
Article
Using advanced supercomputers and the largest X-ray imaging system in the western hemisphere, the team of researchers developed and validated software models for fuel injectors. One the most difficult to understand engine phenomenon, these validated models are useful for simulating fuel injectors and are now available to engine developers.
2014-12-10
WIP Standard
ARP4050A
Characteristics of vertical hard-bearing balancing machines are described which make such machines suitable for gas turbine rotor balancing.

This document specifies the following: a. general dimensions and capacities; b. performance requirements; c. balancing speed ranges; d. drive power requirements; e. balancing machine spindle flange dimensions; and f. test procedures.

Proving rotors and associated test masses required for the performance tests are described in ARP4162.

Test procedures are described in detail and test log samples along with a polar diagram for evaluating the test results are furnished.

The predecessor document ARP588, ISO 2953, and the available technology of hard-bearing balancing machines have been considered in the preparation of this document.

This document was developed for hard-bearing balancing machines but may also be used for existing soft-bearing balancing machines.

2014-12-09
WIP Standard
AIR4543/2
This SAE Aerospace Information Report (AIR) contains Lessons Learned from aerospace actuation, control and fluid power systems technologies. The lessons were prepared by engineers from the aerospace industry and government services as part of the work of SAE Committee A-6, Aerospace Actuation, Control and Fluid Power Systems.
2014-12-09
WIP Standard
J850
Fixed rigid barrier collisions can represent severe automotive impacts. Deceleration conditions during fixed rigid barrier collisions are more readily reproducible than those occurring during impacts with yielding barriers. Barrier collision tests are conducted on automotive vehicles to obtain information of value in reducing occupant injuries and in evaluating structural integrity. The purpose of this SAE Recommended Practice is to establish sufficient standardization of barrier collision methods so that results of similar tests conducted at different facilities can be compared. The barrier device may be of almost any configuration, such as flat, round, offset, etc.
2014-12-09
WIP Standard
J2111
This SAE Recommended Practice provides test procedres, performance requirements, and guidelines for headlamp cleaners intended for use on motor vehicles. It includes informatino from European regulations and International Standards. It is applicable for all types of headlamp cleaners available and in use.
2014-12-02
Article
Toyota today called for a coordinated industry-wide joint initiative to independently test Takata airbag inflators that have been the subject of recent recalls by several automakers. "By combining our collective efforts behind a coordinated, comprehensive testing program, we believe we can achieve greater results.
2014-12-02
Standard
J2139_201412
This SAE Recommended Practice provides standardized laboratory tests, test methods, and performance requirements applicable to signal and marking devices used on vehicles 2032 mm or more in overall width.
2014-12-02
Standard
J2087_201412
This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.
2014-12-01
WIP Standard
J3084
This standard provides common names, definitions and formats for engine test data.
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