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SAFE CRUISING SYSTEM

Netaji Subhas Institute of Technology, New Delhi-Sumit Sarkar
SGSITS,Indore-Abhishek Jain
Published 2003-08-22 by The Automotive Research Association of India in India
“SAFE CRUISING SYSTEM” is an intelligent and adaptive cruise control gadget based on a technology, which has been devised to reduce the number of road accidents, by manifold. This system ensures automatic, intelligent adaptive control of the vehicle by automatic control of brakes and throttle. In this paper, light is thrown on how electronics and computers can be combined to achieve what will become a bare necessity in the near future. This system would be just an additional gadget that has to be fitted to the car, so no change in the assembly line of a car is required. The system can adapt to any kind of situation while driving (be it crowded roads or highways) and to any kind of condition (be it rain, snow, fog, day or night).This system incorporates a strip of Ultrasonic sensors in conjunction with vision camera, and corresponding controllers and is applicable up to a range of 15 metres. This system deals with automatically controlling all systems, thereby leaving the driver with the job of steering the vehicle, ensuring…
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Indigenous Development of Anti-lock Brake System (ABS)

Sundaram-Clayton Limited, Chennai, India-R. Sebastian, M. Sreenivasulu Rao
Published 2003-08-22 by The Automotive Research Association of India in India
Anti-lock Brake System (ABS) was introduced in Europe in early 80's. In India, however, the dual brake system still continues to be the technology. Sundaram-Clayton Limited (SCL), the leading manufacturer of air brake systems for commercial vehicles in India, took the initiative in 1995 to indigenously develop advanced braking technology systems. The first of these - ABS was successfully commercialized in 2002 on a variety of truck, bus and tractor models. This paper briefly describes the phases of indigenous development, testing, proving and successful commercialization of Sundaram-Clayton ABS.
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Virtual Heat Transfer Analysis of the Automotive Disc Brakes

Madras Institute of Technology, Anna University, Chennai, India-J. Jancirani, S. Chandrasekaran, P. Tamilporai
Published 2003-08-22 by The Automotive Research Association of India in India
Heat transfer analysis of the braking system can guide us to evolve an efficient method of cooling of braking system components. In the braking systems, the disc brake can be effectively cooled because, its simpler construction. Even though the heat transfer is relatively easier, in the varied dynamic operating condition of the vehicle, it is relatively complicated to quantify the amount of heat transfer. Under the circumstance of varied heat transfer it is advisable and justifiable to go for a virtual heat transfer analysis through an appropriate computer code based on the standard heat transfer concepts and relations. This paper deals with the convective and radiative heat transfers from the disc brake components based on the fundamental relations for the above heat transfer mechanisms.In this study, the virtual heat transfer analysis was carried out for a typical disc brake system of a four-wheeled passenger comfort vehicle. In this heat transfer analysis convective, radiative heat transfer and heat transfer coefficients were calculated and compared. It is found that, the quantified results are comparable to practical values…
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CAD an Effective Tool in Reduction of Design Cycle Time - Applied to Design of AFV Transmission

Combat Vehicles Research & Development Establishment, DRDO, Avadi, Chennai, India-R. Venugopal, S. Srinivasa Rao
Published 2003-08-22 by The Automotive Research Association of India in India
Design philosophy & methodology has undergone sea change with the advent of computers. Fast changing and exponentially increasing computing power has enabled newer & newer design tools. The 1st generation was based on performance driven design requirement, which was largely manual drawings. The second-generation 2D drafting packages has enabled performance and cost based designs. The current 3D modeling software has enabled design for function, material manufacture and aesthetics.Significant advantage of 3D solid modeling based design is drastic reduction in design cycle time and reduction in design iterations by enabling virtual simulation, prototyping and analysis. The rapid prototyping enables design validation by enabling model testing. CVRDE has effectively utilized 3D solid modeling and analysis packages along with rapid prototyping to reduce the cycle time of design in designing a compact 1400 hp automatic transmission. This paper highlights the methodology followed and the techniques used towards this objective.
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Application of CAE Techniques to Reduce Powertrain Vibrations

Mahindra & Mahindra Ltd., A.S., Nasik-Deepak Nidgalkar, Nitin Ranade, Ajit Batwal
Published 2003-08-22 by The Automotive Research Association of India in India
One of the challenges a powertrain designer has to face during design of its structure is the bending / torsional mode vibrations of powertrain assembly. This aggravates other concerns such as shift lever vibrations, shift lever rattle, rise in in-cab noise, generation of booms at certain speeds, etc. Powertrain modal frequencies generally fall beyond 100 Hz and may get excited during normal engine operation depending on type of engine, no. of cylinders, strokes (2 stroke or 4 stroke) and max. operating RPM. Proper care needs to be taken in order to ensure that these modes are not excited by normal operation of the engine.Conventionally, stiffness of the structure of powertrain is modified such that modal frequencies of the structure are moved out of operating range of engine RPM. This sometimes leads to increased weight of the structure and requires higher development time and cost.Paper discusses the origin of the problem, conventional solutions of modifications and CAE techniques to simulate the powertrain vibration behavior to solve the problem.
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Role Of Electronics And Computers In Modern Automobiles

B.E. Electronics, Pune, India-Ritesh Malhotra
Published 2003-08-22 by The Automotive Research Association of India in India
Electronics and Computers are being increasingly used in development of various subsystems in a modern automobile Vehicle Manufacturers all over the world are spending fortunes on research work in this field of Automotive Electronics. The intent of this paper is to explore and discuss some of these modern electronic systems, how they have influenced modern automobiles and helped them evolve to their present state.
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Computer Assisted Design of Engine Elements

TAFE, Chennai, India-S. Muthukrishnan, G. Kesavan
Published 2003-08-22 by The Automotive Research Association of India in India
The ‘Design of Engine Elements’ Software package embraces the design procedures involved in designing the key engine elements and brings it out in the form of a user-friendly software package. The package was written in Visual Basic 6.0. This package obviates the need for manual design of the key engine components, which is very cumbersome due to extensive mathematical calculations involved. Moreover, any non-technical person who has a little knowledge to work with the computer systems can operate the package effectively. To work with the package one does not require any additional design materials like Design Data Books because most of the constants are built into the program. The results obtained from the software package could be used in the practical design of the components with slight or no modification. The output is available in the form of Production Drawings compatible with AutoCAD. They drawings could also be edited, which provides a high degree or flexibility to the user. Even though a lot of parameters are being handled by the software package, the program is…
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Development of a Small Electric Vehicle for India

Bajaj Auto Ltd., Pune, India-Tapan Basu
Published 2003-08-22 by The Automotive Research Association of India in India
With the tremendous growth in the number of registered vehicles, India is coming to a point where its major cities are becoming virtually unliveable due to rapidly increasing environmental pollution. Public and regulatory pressures dictate the need for a market strategy to plan for alternative transportation technologies to speedily reduce transport related emissions in the urban centres.By far the most popular vehicles in the country are two and three-wheelers. Two key vehicle market characteristics in the country are a relatively benign urban driving profile and a price elastic market demand.This paper presents the background for a viable market for electric vehicles in India. It looks at the efforts associated with design, development, testing, and demonstration of the product, along with lessons learned. The results could provide an insight into the path to commercialisation of such vehicles.
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RTOS & Embedded Systems

Visteon Software Operations, Chennai, India-S. Sivakumar
Published 2003-08-22 by The Automotive Research Association of India in India
In the field of Embedded system development, cost is one of the major constraints. Minimizing the Hardware cost in the system is one of the ways to reduce the cost of the embedded product as it is produced in large quantities. Real-time Operating System (RTOS) is a tool to optimize the software implementation of the system so that use of hardware resources can be optimized which in turn reduce the cost of the system.
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A Computer Code for Virtual Simulation of Diesel Fuel Spray Characteristics for Automotive Engines

Department of Automobile Engineering, Anna University - MIT Campus, Chennai, India-N. Shenbaga Vinayaga Moorthi, P. Tamilporai, S. Subramaniyam
Published 2003-08-22 by The Automotive Research Association of India in India
Diesel fuel conservation will greatly help in increasing fuel economy and saving foreign exchange. Though many alternate fuels are being tried, diesel fuel will be the prime source of energy in the near future. So optimum utilization of diesel fuel will greatly help in achieving fuel conservation. Hence proper understanding of the diesel engine combustion mechanism is very much essential to achieve the fuel conservation. Though many experimental investigations have been tried in this direction, theoretical modeling and virtual simulation are helpful to understand the above said mechanism in an efficient way. In this work, a source computer code has been developed to virtually simulate the diesel fuel spray characteristics, which are predicted based on an integrated spray and combustion model considering ‘Fuel-Air mixing’ and ‘Droplet Vaporization’. The same code has been used to plot the virtually predicted results. The graphical representation were analyzed and discussed.Based on the predicted results, it has been observed that the spray penetration decreases from 70mm to 30mm for a pressure rise of 30 bar, the Sauter Mean Radius increases…
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