Your Selections

Fifth International SAE India Mobility Conference on Emerging Automotive Technologies Global and Indian Perspective
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Development of a system for control of Air Fuel ratio in a small two wheeler engine

Department of Mechanical Engineering, IIT Madras, Chennai, INDIA-P.V. Manivannan, Ciju Paul, A. Ramesh
Published 2008-01-09 by The Automotive Research Association of India in India
In the case of small SI engines for two-wheelers emission reduction will preferably be achieved through the use of lean mixtures since catalytic converters will increase the cost. In such cases a very close control over the air fuel ratio will be needed. In this work a carbureted 125cc small capacity two-wheeler engine was modified to operate with Port Fuel Injection (PFI) for improved control over the air fuel ratio. A throttle body was specially made to house the injector and a position sensor. A cam position sensor, crank angle sensor, manifold air pressure (MAP) sensor, 60-2 toothed wheel for precise control of the events on the angle basis were used. Extensive tests were conducted with the throttle body and fuel injector to obtain the mathematical models for the inlet manifold and fuel injector. These were used to make the model based controller. The dSPACE - Micro Auto Box platform was used to develop and test the control algorithms. Software was written using SIMULINK. The closed loop PID algorithm was used for air-fuel ratio control…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Emission Control Options to Achieve Euro IV and Euro V on Heavy Duty Diesel Engines

Johnson Matthey, Emission Control Technologies-Sougato Chatterjee, Andrew P. Walker, Philip G. Blakeman
Published 2008-01-09 by The Automotive Research Association of India in India
The modern Diesel engine is one of the most versatile power sources available for mobile applications. The high fuel economy and torque of the Diesel engine has long resulted in global application for heavy-duty applications. Moreover, the high power and excellent driveability of today's turbo-charged small high-speed Diesel engines, coupled with their low CO2 emissions, has resulted in an increasing demand for Diesel powered light-duty vehicles.However, the demand for Diesel vehicles can only be realised if their exhaust emissions meet the increasingly stringent emissions legislation being introduced around the world. In the USA, both HDD and LDD vehicles are meeting strict emissions legislations since 2007 with the introduction of particle filters which will be further restricted from 2010 with the use of additional NOx contr5ol systems. In Europe, similar strict requirements are being implemented with Euro IV, Euro V and finally through Euro VI legislations. In practice, such targets mean very high reductions (up to 90%) of nitrogen oxides (NOx) and particulate matter (PM) emissions are being required from previous levels.This paper reviews the developments…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Control of GHG Emissions from Transport Vehicles: Issues & Challenges

Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi - India-K.A. Subramanian, L.M. Das, M.K.G. Babu
Published 2008-01-09 by The Automotive Research Association of India in India
This paper is aimed at highlighting the issues and challenges, and some control measures of GHG emissions (CO2, N2O and CH4) from transport vehicles. The importance of fuel economy improvement on CO2 emission reduction is emphasized as it will be an immediate solution to reduce the emission. The role of alternative fuels and vehicles on control of GHG emission is discussed in this paper. The CO2 emission norms proposed by some country are also discussed in detail.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

An experimental investigation on performance and emission characteristics of eucalyptus oil-diesel blends at various injection timings in a D.I. diesel engine

Asst. Professor, Department of Mechanical Engineering, Jerusalem college of Engineering, Chennai, Tamil Nadu, pkdevan@yahoo.com -P.K. Devan
Asst. Professor, I C Engines Division, Department of Mechanical Engineering, College of Engineering, Guindy, Anna University, Chennai, Tamil Nadu, nvmal2001@yahoo.co.in -N.V. Mahalakshmi
Published 2008-01-09 by The Automotive Research Association of India in India
Experimental investigations were carried out to study the performance and emission characteristics of a D.I diesel engine running on eucalyptus oil-diesel blends. Eucalyptus oil is derived from biomass and is renewable. Various eucalyptus-diesels blends namely 20:80, 30:70, 40:60, 50:50 (by volume) were tried. The optimum quantity of eucalyptus was chosen as 40% based on the performance. The injection timing was advanced to ensure adequate mixing and vaporization of high-octane fuel-diesel blends. With advanced injection timings it was noticed that there was a better performance with decrease in emissions of UBHC, CO than at standard injection timing. Smoke emission decreased drastically with penalty of slightly higher NOx emissions. The engine was operated at the injection timings of 23°, 27° and 31° bTDC. The performance and emission characteristics were analyzed at these timings for all the blends. At 31° bTDC, NOx increased drastically with poor combustion behavior. At the injection timing of 27° bTDC the engine was running smoothly with better performance and emission characteristics, hence injection timing 27° bTDC was optimized for this work and the…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Hexa chrome free passivation — Experience as part of ELV Implementation

Maruti Suzuki India Ltd.-Jitendra Malhotra, Smriti Talwar
Published 2008-01-09 by The Automotive Research Association of India in India
Hexavalent chromium Cr(VI) is recognized as a known human carcinogen via inhalation. This is banned to be used in Corrosion Protective Coatings as per End Life of Vehicle regulation (ELV) 2000/53/EC effective July'07 in EU. Traditionally all automotive metallic components which are Zinc plated are passivated with a thin Chromate layer to add to its brightness and protect it from premature corrosion. These Chromate coatings (or passivation) are generally Hexavalent chromium based and available in four grades: clear, yellow, olive drab, and black.Alternatives in the form of Trivalent Chromium Cr(III) are now available. By nature, both these passivations have different properties. Trivalent chromium has high temperature resistance but low wear resistance thus does not possess self healing properties. Also, its cost is significantly higher compared to hex chrome solutions. Most importantly, strict process controls like control of temperature, pH, concentration etc are necessary for Trivalent passivation. Failing this, SST (Salt Spray test) performance goes down. Further aggravating the situation is the fact that plating industry in India is highly unorganized in form of small job…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Emission and Combustion Characteristics of Vegetable Oil (Jatropha curcus) Blends in an Indirect Ignition Transportation Engine

Department of Mechanical Engineering Indian Institute of Technology Kanpur, Kanpur-208016 India-Harish Kumar Gangwar, Avinash Kumar Agarwal
Published 2008-01-09 by The Automotive Research Association of India in India
The scarce and rapidly depleting conventional petroleum resources have promoted research for alternative fuels for internal combustion engines. Among various possible options, fuels derived from vegetable oils present promising “greener” substitutes for fossil fuels. Vegetable oils due to their agricultural origin are able to reduce net CO2 emissions to the atmosphere along with import substitution of petroleum products. However, several operational and durability problems of using straight vegetable oils in diesel engines reported, which are because of their higher viscosity and low volatility compared to mineral diesel. In the present research, experiments were designed to study the effect of reducing Jatropha oil's viscosity by blending with mineral diesel, thereby eliminating its effect on combustion characteristics of the engine. In the present experimental research, vegetable oil (Jatropha Curcus) was used as substitute fuel. Experimental investigations have been carried out to examine the emission and combustion characteristics in an indirect injection transportation diesel engine running with mineral diesel and vegetable oil blends with mineral diesel. Engine tests were performed at different engine loads ranging from no load…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

PM Metalit® - A Continuously Regenerating Partial Flow Particulate Filter - Concept and Experience with Korean Retrofit Programme

Emitec Emission Control Technologies India Pvt. Ltd.-K.V.R. Babu, Chris Dias, Shivraj Waje
Emitec GmbH-Alfred Reck
Published 2008-01-09 by The Automotive Research Association of India in India
Emission legislations for the light / medium and heavy duty vehicles are becoming more and more stringent worldwide. Tightening of NOx and Particulate Matter (PM) limits further from Euro III to Euro IV levels has provoked the need of either controlling NOx from the engine measures and use PM control after-treatment devices such as Partial Flow Filters, or, controlling PM from the engine measures and use NOx control devices such as Selective Catalytic Reduction (SCR) systems. Manufacturers have adopted different strategies, depending upon the suitability, cost factors, infrastructure development and ease of maintenance of these systems.PM Metalit®, is a partial flow filter, which captures particulates coming out of the exhaust and re-generates on a continuous basis with the help of Nitrogen Dioxide (NO2) in the exhaust. As NO2 content is generally less in a typical exhaust of a diesel engine, a Diesel Oxidation Catalyst should be used before the PM Metalit®, in order to generate NO2 from the Nitrogen Oxide (NO) available in the exhaust. The PM Metalit® systems have been in use in Europe…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

STRATEGIES FOR AUTOMOBILE GEAR MATERIAL SELECTION

Mahindra & Mahindra Ltd.-Dilip Shastri, S. Ramamurthy, Pratap Parab
Published 2008-01-09 by The Automotive Research Association of India in India
Material selection is based on Process such as forging, die-casting, machining, welding and injection moulding and application as type of load for Knife Edges and Pivots, to minimize Thermal Distortion, for Safe Pressure Vessels, Stiff, High Damping Materials, etc.In order for gears to achieve their intended performance, durability and reliability, the selection of a suitable gear material is very important. High load capacity requires a tough, hard material that is difficult to machine; whereas high precision favors materials that are easy to machine and therefore have lower strength and hardness ratings. Gears are made of variety of materials depending on the requirement of the machine. They are made of plastic, steel, wood, cast iron, aluminum, brass, powdered metal, magnetic alloys and many others. The gear designer and user face a myriad of choices. The final selection should be based upon an understanding of material properties and application requirements.This paper commences with a general overview of the methodologies of proper gear material selection to improve performance with optimize cost (including of design & process), weight and…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Stability and Characterization of Nanofibers on Liquid filtration media in Automotive Filters

Mahle Filter Systems India Ltd.-Rajesh Natarajan, Rajeev Kapoor, Umesh Ghadi
Published 2008-01-09 by The Automotive Research Association of India in India
In automotives, filter serves as one of the most significant part of any vehicle. The demand for filters in direct injection and alternative fuel systems in engines have been increased and to prevent the injection system from untimely failure, filters with increased filter efficiency and life is needed. Currently, the cellulose media made on the wetlaid process is used for this study and the experiments are carried out by depositing the nanofibers over this media using electrospinning process. The preliminary studies were carried out by varying the process parameters such as Voltage, Needle diameter, Electrode spacing distance and concentration using Taguchi's L9 orthogonal array experimentation. The influence of process parameters on nanofiber diameter is also investigated by using ANOVA analysis. The stability and characterization of nanofibers were carried out on oil/fuel filtration media. Finally, an empirical model based on the mean analysis was developed for the prediction of nanofiber diameter in filtration media with enhanced performance in both life and efficiency.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

A detailed Mean Value Model of the exhaust system of an automotive Diesel engine

Department of Industrial Engineering (IED) - Faculty of Engineering - University of Parma - Parma (Italy)-Paolo FIORANI, Agostino GAMBAROTTA, Gabriele LUCCHETTI
Magneti Marelli Powertrain SpA - Bologna (Italy)-Francesco P. AUSIELLO, Matteo DE CESARE, Gabriele SERRA
Published 2008-01-09 by The Automotive Research Association of India in India
Theoretical models are useful tools in the design of engine control systems, with applications that range from the design of engine layout, the definition of optimised management systems, to hardware-in-the-loop testing (HiL) and to model-based control strategies.To define theoretical models for control-oriented applications, an original library has been built up at the University of Parma for the simulation of the intake and exhaust systems of automotive turbocharged engines. Starting from this library, a Mean Value Model (MVM) of a Diesel engine, with variable-geometry turbocharger (VGT), EGR and throttle valve, has been developed for a small automotive application.In the paper the matching of the engine model with a detailed model of the exhaust system (developed by Magneti Marelli Powertrain) is presented. After treatment devices (pre-cat, main-cat and particulate filter) are described through black- and grey-box models, taking account of thermal transients and of soot accumulation/regeneration of the filter. A specific calibration procedure allowed to fit the model to a real automotive application (a Diesel engine with VGT and EGR). Simulations proved to run faster than “real…
Annotation ability available