Criteria

Text:
Affiliation:
Display:

Results

Viewing 1 to 16 of 16
2012-09-24
Technical Paper
2012-01-2054
Yaamini Devi Loganathan, Senthilkumar Panneerselvam, Sreedharan D
The goal of any Lean organization is to understand customer value and to focus its efforts to continuously increase it. Lean applies to every business and every process and so is applicable for New Product Development (NPD) in Automobile industry, where the major output is the vehicle part numbers. Part numbers are generated based on the variant tree finalized. Customer requirements, benchmarks and organization assets such as lessons learnt and historical information provide input to the variant tree. Parts numbers for a particular model are generated during the concept Bill of Materials (BOM) stage and after which it exists during the complete product life cycle. Part number generation includes considerable effort by the design team, the validation team, and also includes overheads on the Product Life cycle Management (PLM) system.
2014-09-30
Technical Paper
2014-01-2429
C Venkatesan, V Faustino, S Arun, S Ravi Shankar
Abstract The automotive industry needs sustainable seating products which offer good climate performance and superior seating comfort. The safety requirement is always a concern for current seating systems. The life of the present seating system is low and absorbs moisture over a period of time which affects seat performance (cushioning effect). Recycling is one of the major concerns as far as polyurethane (PU) is concerned. This paper presents the development of an alternative material which is eco-friendly and light in weight. Thermoplastic Polyolefin (PO) materials were tried in place PU for many good reasons. It is closed cell foam which has better tear and abrasion resistance. It doesn't absorb water and has excellent weathering resistance. Also it has a better cushioning effect and available in various colours. Because of superior tear resistance, it is possible to eliminate upholstery and would reduce system level cost.
2015-09-29
Technical Paper
2015-01-2722
Sundarram Arunachalam, Ramprabhu Kannan, Nagarajan Gopikannan, Jayaramareddy Sekar
Abstract With advancement of technology, better safety and higher vehicle reliability is primary requirement of end customer especially in public transportation. Hence there exist challenges in design and development of steering system for long haulage and tipper application. In the steering system, track rod is used to steer both the front tyre under different operating condition assisted by power steering system. This paper deals with the failures observed on track rod in long haulage and tipper application with loading conditions. Also the methodology adapted to resolve the field failures.
2015-09-29
Technical Paper
2015-01-2721
Balaji Lomada, R. Jayaganthan, V. Vijaykumar
Abstract Commercial vehicle industry is presently striving towards development of buses with enhanced passenger safety and comfort. This calls for additional components and aggregates that eventually lead to increase in the overall length and gross vehicle weight (GVW) of the bus for the same passenger capacity. Usually, steering system of longer front overhang (FOH) vehicles have multiple linkages such as bevel box arrangement or intermediate pivot arm arrangement instead of single direct draglink because of packaging and design constraints. In this work, an attempt has been made to design the steering system for one of the longer FOH bus with single direct draglink arrangement. Here, single draglink was packaged and designed with commercially available higher strength tube material. Design optimisation of steering geometry was carried such that the steering performance was atleast on par with existing performance.
2015-09-29
Technical Paper
2015-01-2726
Balaji Lomada, N G Rajakumar, V Vijaykumar
Abstract Commercial vehicles have steering systems with one or more steering links connecting the steering gear box pitman arm and front axle steering arm. In case of twin steer vehicles, intermediate pivot arm is used to transfer the motion proportionately between the two front axles. Intermediate pivot arm is also used in some longer front over-hang vehicles to overcome their packaging constraints and to optimize the mechanical leverage. The pivot shaft is a mechanical part of the intermediate pivot arm assembly upon which pivot arm can swivel in one axis. Steering forces transferred through the drag links generates resultant forces and bending moments on the pivot shaft. In this work, study has been carried out on premature failure of the pivot shaft in city bus application model (Entry + 1 step). Metallurgical analysis of failed part indicated the failure to be due to fatigue. Pivot shaft was tested in rig with similar load conditions in order to replicate the failure.
2015-09-29
Technical Paper
2015-01-2757
Deepak Anand Subramanian, Nithya Sridhar, N. Obuli Karthikeyan, V. Srinivasa Chandra
Abstract The Indian automotive sector is experiencing a major shift, focusing predominantly towards the levels of quality, reliability and comfort delivered to the customer. Since the entry of global players into the market, there is a rising demand for timely product launches with utmost priority to reliability. In any vehicle, engine isolation systems play a critical role in isolating the engine vibrations from the vehicle chassis. This project details on how testing can aid in reducing the launch time as well as estimating the reliability of the component when used in a different application/vehicle. It proposes a methodology to formulate a life model for the engine mount considering various combinations of predictor parameters affecting its performance over its design life. In order to maintain good correlation with the field (which considers the loading pattern and the environmental factors), warranty data was analyzed and the predictors were chosen appropriately.
2015-09-29
Technical Paper
2015-01-2889
R. Saravana Venkatesh, Sunil Pandey, Sathyanandan Mahadevan
In heavy duty diesel engines, exhaust gas recirculation is often preferred choice to contain NOx emissions, in this a part of exhaust gas is tapped from exhaust manifold or later and recirculated to air intake pipe before intake manifold. Critical to such engines is the design of air intake pipe and intake manifold combination in view of proper exhaust gas mixing with intake air. The variation in exhaust gas mass fraction at each intake port should be as minimal as possible and this variation must be contained within +/− 10% band to have a minimal cylinder to cylinder variation of pollutants. Exhaust gas homogeneity for various intake configurations was studied using three-dimensional computational fluid dynamics for a 4 cylinder, 3.8 L, Diesel fuelled, common rail, turbocharged and intercooled heavy duty engine. Flow field was studied in the computational domain from the point before exhaust gas mixing till all the four intake ports.
2013-11-27
Technical Paper
2013-01-2789
Parag Nemichand Jain, Satish Pavuluri
In mining tippers, rear suspension plays a major role in defining vehicles ride and handling characteristics, stability and load carrying capacity. Bogie type of suspension is well suited for these applications. Bogie suspension mainly consists of bogie bracket, leaf springs and radius rods. Nonlinear static analysis is performed for a bogie bracket assembly considering bolt pretension and contacts to evaluate the static strength of bogie bracket. Since bogie bracket is connected to frame with several bolts, a sensitivity analysis is carried out to study the effect of bolt loosing on bogie bracket. The surface contact interaction (stick-slip) behavior between frame and bogie suspension mounting bracket is also studied. Good correlation is achieved with testing results.
2013-11-27
Technical Paper
2013-01-2782
Vibhay Kumar, gopala uppala
Oil strainer is used in engine oil sump, which prevents dirt, scale and other particle from clogging downstream orifice. In this paper, dynamic analysis was carried out using FEA tool. As a part of dynamic analysis, constrained modal analysis and frequency response (steady state dynamics) analysis was done. Frequency response analysis was done for different engine exciting frequency at different service load (vibration amplitude). Modal superposition method is used for doing frequency response analysis and load is applied as base excitation. The natural frequency from modal analysis and stress response from frequency response analysis is well correlated with test results. Based on achieved good correlation with test, several design modification could be carried out in CAE before finalizing the final design.
2013-11-27
Technical Paper
2013-01-2806
Gaurav Adke, Joseph Philip
The application of virtual simulations of crash has become an integral part of the vehicle development process. Virtual simulation offers opportunities to reduce development time and the number of physical prototypes consumed for design verification and validation. With the continuously increase of new accident and regulatory scenarios the dependency to virtual simulation and validation is becoming an inseparable factor in product development. This paper presents simulations that are performed to verify various safety aspects to ensure crashworthiness of the truck cabin. The cabin structure was evaluated for various load cases as per ECER 29 rev 2.0 safety regulation [1]. The FE model and simulation methodology was validated through physical testing and correlated for frontal impact test and roof strength test as per AIS 029/ECE-R 29 rev 2.0 [2]. Paper also discuss on the issue faced in correlation of test vs. Virtual validation using explicit solver.
2013-04-08
Technical Paper
2013-01-1006
Vijay Antony John Britto, Sadasivam Sivasankaran, Ekambaram Loganathan, Saisankaranarayana Kupplili Saisankaranarayana, Kalyankumar Sidram Hatti
The cost incurred to make design modifications to solve NVH problems increases with maturity of design in the development process. Hence NVH issues should be addressed in the initial phase to avoid any significant changes in structure and subsequent changes in overall performance of the vehicle. Hybrid methodology with application of advanced testing and Computer Aided Engineering (CAE) tools to achieve full vehicle NVH attribute targets is nowadays a must for this reason. This paper represents a case study on low frequency NVH performance evaluation and refinement for heavy commercial vehicle truck using Hybrid Test-CAE methodology. To achieve better NVH performance, it is important to set competitive overall vehicle level NVH targets and cascade it down to system and sub-system targets. Test-CAE correlation has been carried out to validate Finite element (FE) modeling procedure and methodology.
2006-10-31
Technical Paper
2006-01-3577
K. Hariharan, S. Suresh, T. Venugopalan, Anup. K. Sharma
Automotive sheet metal components involve complex geometry and large surface areas. In addition to complex geometry, thrust for reduction of the new product development cycle demands for virtual simulation before prototyping. However in order to validate the simulation parameters, the numerical model needs to be experimentally verified. Conventional strain measurement techniques like Mylar tape, Traveling microscope are tedious and error prone for sheet metal forming analysis. Recently, optical strain measurement techniques are being used in sheet metal forming industry. Through this, strain measurement is more accurate, less time consuming and repeatable. This paper discusses a case study in which the analysis results of an automotive sheet metal component are experimentally validated by circular grid analysis using an optical strain measurement method. The circular grids are marked in the sheet metal blanks by screen-printing.
2007-10-30
Technical Paper
2007-01-4282
K. Hariharan, S. Suresh
The sheet metal forming is conventionally studied using circular grid analysis. The recent developments in image processing techniques have made more accurate prediction of forming strains possible. Optical strain analysis is difficult for shop floor quality because of the higher cost of the system. Besides, the optical strain analyzer demands certain illumination requirements. Hence, conventional circular grid analysis is preferred for formability inspection at shop floor level. This paper focuses in benchmarking the circular grid analysis technique against the optical strain analysis for an automotive component. In the current work, the results of finite element analysis of a stamping process are initially validated with more accurate optical strain analysis. Later, the validation is done separately with circular grid analysis and the results of circular grid analysis are compared against that of optical strain analysis.
2014-09-30
Technical Paper
2014-01-2312
Venkatesan Chokkalingam, Mohan Rao
Abstract The durability of the components in a vehicle plays one of the major roles in its life cycle cost. The powertrain mount is one such component since its rubber characteristics have significant impact on the vehicle's NVH and fatigue life. This paper presents the enhanced durability benefits obtained by changing the polymer composition, manufacturing methods and design optimization of a powertrain mount for an off-road commercial vehicle. The methodology involved characterization[2] of the existing mount, arriving a new compound formulation, making of prototypes, experimental validation for durability[3] and repeatability in the laboratory combined with rigorous on field vehicle trials. NVH measurements were also carried out on the improved mounts. The above exhaustive exercise resulted in the development of a comprehensively far better mount than an existing mount with improved durability without compromise on NVH properties.
2013-04-08
Technical Paper
2013-01-1294
Kiran N, B Balaji
A methodology for design and development of commercial vehicle cooling system is derived with an objective to minimize part cost, engineering resources and time to market. This approach is very useful in companies with more variant of engines and vehicles. For this it is identified to have a common cooling system for a set of engines. A systematic approach to develop cooling system based on heat rejection is conceptualised. Engines are classified based on heat loads in to various groups. The cooling package selected for a particular group is independent of type of vehicle (bus or truck), cab (day, sleeper, FES or FBS), Type of drive (LHD or RHD), Emission norm (BSIII or BSIV) and fuel (Diesel or CNG). These packages will cover up the entire range of vehicles and engines. The packaging space available for each group is derived and the cooling package size is finalised. Fan and fan pulley options are listed based on air flow and fuel efficiency requirements.
2013-11-27
Technical Paper
2013-01-2764
Abhay Chafekar, Arun Sivasubrahmaniyan, Faustino V
Buses have been main means of mass transport in organized as well as unorganized sectors in India. Though the art and science of Chassis Designing had been practiced and matured by all Indian OEMs, Body design had long not been accorded high priority by them. Till 1989, there was no comprehensive set of rules enforced. Bus designs were developed with scant regard for safety and emission. OEMs sold their products in the form of drive away chassis and the Body Design & Body Building was largely left to Body Builders, many of whom employed poor design, build and quality control practices. Spurious materials, parts, non-uniform construction resulted in number of accidents and many of them were fatal. Central Motor Vehicle Rules (CMVR) kicked-in 1st July 1989. With roll out of CMVR, various safety related features like entry/exit door, emergency exits, window frames, their locations, dimensions and designs were defined.
Viewing 1 to 16 of 16

    Filter

    • Range:
      to:
    • Year: