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Symposium on International Automotive Technology~SIAT 2003
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Reduction of Mimic Sound in Outside Mirrors Using Jury Test

Hyundai Motor Company, Korea-Jeonghan Lee, Kangduk Ih, Seunggyoon Jung
Published 2003-01-18 by The Automotive Research Association of India in India
The so called “mimic” noise centered around a certain frequency from a folding-type outside mirror in vehicles originates from the folding gap of the mirror and is subject to complaints by acoustically sensitive customers. The noise usually is concentrated around a certain frequency above 2 kHz and is heard intermittently depending on the direction of the wind. The noise is thus difficult to identify using general analysis methods using ensemble averages. The sound, however, is clearly identifiable by human ears. Jury testing is performed by recording sound samples inside of vehicles and designing the experiment. Analysis of the test result reveals that the maintenance of gap uniformity as well as the filling of the cavity within the gap is crucial to the noise reduction.
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Emission Study and Evaluation of Emission Control Devices on Euro I / Euro II Compliant Indian Vehicles and Engines with Different Sulphur Content Fuel

The Automotive Research Association of India, Pune, India-Amita Baikerikar, M. K. Chaudhari
Published 2003-01-18 by The Automotive Research Association of India in India
The paper deals with methodology for selection of Emission Control Devices (ECD), test matrix and evaluation procedure followed for vehicles, engines and analysis of test results.In the present scenario, it is always being discussed that how existing vehicles and engines manufactured in India complying to Euro I /Euro II standard will perform with different sulphur percentage fuel. The emission control device such as Oxidation Catalytic Converter (OCC) is not very commonly used on the Euro-II vehicle and heavy-duty commercial vehicles. The performance of diesel oxidation catalyst on different sulphur percentage is of vital importance in Indian scenario. The particulate matter is always a concern in diesel vehicles and engines and most of Indian vehicles are having very low margin for particulate matter vis-à-vis regulation.Considering above, a comprehensive study by ARAI is undertaken with the objective to compare emission characteristic of diesel 3 wheeler vehicle, utility vehicle, heavy duty engine and tractor engine with fuels having different sulphur content of 50 ppm, 150 ppm, 300 ppm and 500 ppm.The above engine and vehicles were installed with…
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Retrofit Electronic Engine Control (REEC) System to Reduce Fuel Consumption

DESCo Research Ltd, UK-Mike J. Howes
Published 2003-01-18 by The Automotive Research Association of India in India
The paper describes a novel system suitable for retrofitting to any internal combustion engine fitted with a carburetor fuel device. The system uses modern electronics to control the fuelling and ignition timing of the engine to reduce fuel consumption and polluting exhaust emissions. The guiding principles of the designers were to produce a system suitable for older engine designs used throughout the developing world that would benefit the economies and environments of such countries. The system is a low cost solution and is designed to be manufactured locally.
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Performance and Durability of Advanced Ceramic Catalyst Supports

Corning Incorporated, New York, USA-Suresh T. Gulati, W. Miao, L. E. Hampton, S. Widjaja, K. W. Hughes, P. Flörchinger
Published 2003-01-18 by The Automotive Research Association of India in India
As emissions regulations become more stringent, catalyst supports with higher cell density, smaller wall thickness, higher surface area and lower thermal mass become more desirable for faster light off and higher conversion efficiency. Simultaneously, however, washcoat formulation and loadings have to be adjusted to yield higher and more stable B.E.T. area at operating temperatures representative of close-coupled application. The thermal mass contribution of advanced washcoat system to catalyst supports with 600/4 and 900/2 cell structures may approach or even exceed that of uncoated substrates. Under such high washcoat loadings, the composite properties of advanced catalysts may be affected adversely in terms of their physical durability, notably in close-coupled application. This paper focuses on potential solutions to light-off performance and FTP efficiency, via optimization of substrate/washcoat interaction, geometric design and the mounting system. In this manner both the performance and durability of advanced ceramic catalyst supports can be ensured over the lifetime of the vehicle.
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Bio Fuels as Blending Components for Gasoline and Diesel Fuels

Indian Oil Corporation Limited, Faridabad, India-R. K. Malhotra, N. R. Raje
Published 2003-01-18 by The Automotive Research Association of India in India
Bio-fuels are being viewed from the multi-dimensional prospective of depleting fossil fuels resources and promoting environmental health, energy security, support to agricultural sector and rural employment. Increased attention is being paid for the use of bio fuels production and their utilization in the transport sector. India being a major agricultural based economy with large scale dependence on imported crude oil will certainly benefit through the increased use of agricultural resources for producing bio fuels which could be blended with motor gasoline and diesel fuel. With high volatility in international oil prices, it is important that we must reduce our dependence on imports of oil for energy security of the country. Based on the success of the pilot projects started earlier with 5 % ethanol in gasoline, Government of India has already decided to blend 5 % of ethanol in gasoline on a commercial scale. Indian Oil Corporation Research & Development (IOC R&D) has also conducted an extensive programme for the use of ethanol upto 10 % in motor gasoline. Vehicle startability, driveability, emissions and durability…
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Effect of Payload, Road Surface and Speed of Vehicle on Durability

The Automotive Research Association of India, Pune, India-M. R. Saraf, M. S. Jambhale
Published 2003-01-18 by The Automotive Research Association of India in India
Road surface, payload and speed of the vehicle are important parameters, which affect the life of a vehicle. This paper discusses the relationship between road/load/speed and damage to the vehicle as a whole and automotive structure in particular. This will help the designer to understand non-linear relationship between different service conditions and damage and to arrive at realistic input spindle loads for design considerations. This will also help the evaluation engineer in the development of durability cycle by correlating different environmental conditions with actual service conditions.
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Development and Field Test of Ceramic-based Diesel Particulate Filter (DPF) for Urban Transport Vehicle

Bharat Heavy Electricals Limited, Bangalore, India-Rathindra Nath Das, C. D. Madhusoodana, M. E. Purushothama
Karnataka State Road Transport Corporation, Bangalore, India-S. K. Paramesh, P. S. Ananda Rao
Published 2003-01-18 by The Automotive Research Association of India in India
Particulate matter in the diesel exhaust is the dominant mobile source of cancer in the urban transport system. Diesel particulate filter (DPF) using a ceramic wall flow filter is the promising technology for abating particulate matter pollution. The mechanical durability of ceramic filter due to vehicle vibration, thermal durability during regeneration and efficient and economical regeneration systems are the major concerns for making this system viable. A novel system of DPF with simple and viable regeneration method suitable to Indian urban transport was developed and evaluated for performance by field testing. DPF was designed using wall flow filter made from highly thermal shock resistant cordierite honeycombs after optimizing the back pressure and engine power loss. The mechanical durability was measured after fitting DPF in a transport bus and running it for several cycles, accumulating with periodic regeneration more than 20,000 km and observed no deterioration of performance. An electrical regeneration system was designed with a practical regeneration interval of about a day using stationary power and pressurized air source. The back pressure, smoke density, temperature,…
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Engine Concepts for CNG Application

FEV Motorentechnik GmbH, Germany-M. Wilhelm
Institute for Combustion Engines, RWTH Aachen Technical University, Germany-M. Umierski
Published 2003-01-18 by The Automotive Research Association of India in India
Since the CO2 emissions of passenger car traffic and their greenhouse potential are in the public interest, natural gas (CNG) is discussed as an attractive alternative fuel. The engine concepts that have been applied to date are mainly based on common gasoline engine technology. In addition, in mono-fuel applications, it is made use of an increased compression ratio - thanks to the Research Octane Number (RON) potential of CNG, which allows for thermodynamic benefits.This paper presents advanced engine concepts that make further use of the potentials linked to CNG. Above all, the improved knock tolerance, which can be particularly utilized in turbocharged engine concepts. For bi-fuel (CNG/gasoline) power trains, the realization of variable compression ratio is of special interest. Moreover, lean burn technology is a perfect match for CNG engines. The fuel economy and the emission levels are evaluated based on test bench and vehicle investigations.
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Evaluation of Pd/Rh Catalytic Converter on Passenger Cars

Indian Institute of Technology, Delhi, India-J. P. Subrahmanyam, M. K. Gajendra Babu
Indian Oil Corporation Ltd, Faridabad, India-M. Subramanian
Published 2003-01-18 by The Automotive Research Association of India in India
The investigations relating to the evaluation of an automobile catalytic converter are reported in this paper. These investigations are aimed at arriving at a data that would pave the way for the optimization of a catalytic converter by experimental and computer simulation at steady and transient operating conditionsThe converter used in the present study contains Pd, Rh binary catalyst (10:1) impregnated on ultra thin ceramic substrate. Characterization of catalytic converter was done for its compositions using Inductively Coupled Argon Plasma (ICAP) and Scanning Electron Microscope (SEM). The necessary instrumentation developed, which include pre and post converter emissions, backpressure and exhaust gas temperature are described for both steady and transient conditions. The experimental setup has been designed for assessing the performance of a catalytic converter on a passenger car at different operating conditions. The A/F ratio of the engine was mapped at different vehicle speeds on a carbureted engine. Performance of the Pd/Rh converter was analysed under steady speeds and Indian Driving Cycle (IDC) for simulating steady and transient conditions. Thermal behaviour of ultra thin ceramic…
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Sensitivity Analysis for Structure Borne Noise Reduction of Diesel Engine

The Automotive Research Association of India, Pune, India-D. J. Kalsule, S. D. Wagh, S. M. Athavale
Published 2003-01-18 by The Automotive Research Association of India in India
The demands resulting from stringent noise legislations are increasing rapidly. It has become necessary to establish optimum design methods for low noise engines. In this paper, a methodology for structure borne engine noise control using the combination of experimental and computer aided techniques is presented. Sensitivity analysis for noise reduction is carried out for various structural modifications. The major structural improvements include addition of ribs, stiffening plate and crankcase shape modifications. The final models were validated using experimental analysis techniques.
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