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Child Safety Lock Override Mechanism - For Woman Safety

Hyundai Motor India Engineering Pvt Ltd.-Ravi Kumar S, Priya K
  • Technical Paper
  • 2019-28-2403
Published 2019-11-21 by SAE International in United States
Child safety lock override mechanism - For Woman Safety Woman safety is a major concern in present world and the related laws ensure that government also cares for it. Mostly in public taxies, there is possibility for the driver to harass women occupant by activating the child safety lock without her knowledge. Purpose of child safety lock is to prevent child in the rear seat from opening the door and fall from vehicle. This will cause severe injury to the child. When child lock is ON, Inside Door handle becomes inoperative and the child cannot open the door. Only way to open door is through outside handle. But there is possibility for Taxi driver to kidnap the woman customer by enabling child safety lock, so that inside handle becomes inoperative and make her get trapped in car. To prevent such cases in future, Ministry of Road Transport ordered the manufacturers to delete child safety lock for all commercial vehicles. But even then, Child in rear seat of a taxi (Without child lock) and women in…
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Aerodynamic analysis of commercial vehicle using active vortex generators concept

ARAI Academy-Saurabh Jayant Kulkarni, Kamalkishore Vora
Automotive Research Association of India-Mohammad Rafiq Agrewale
  • Technical Paper
  • 2019-28-2409
Published 2019-11-21 by SAE International in United States
Any physical body being propelled through the air has drag associated with it. Drag will be created on the surface of the vehicle due to the flow separation at the rear end. In aerodynamics the flow separation can often result in increased drag particularly pressure drag, to delay the flow separation, the vortex generators are used on the roof end of the vehicle just before the point of flow separation. The objective of this project is to perform aerodynamic analysis of commercial vehicle using active vortex generators concept. First, the aerodynamic analysis of a baseline commercial vehicle model is performed and same is validated with the scaled model by using a wind tunnel test. Further analysis has been done by using active vortex generators concept with variation of angle of attacks for vehicle speed of 50, 70, 90 kmph. Also, analysis has been carried out for six different yaw angles. The simulation is carried out with the use of ANSYS Fluent. The simulation result shows the significant drag coefficient reduction of the commercial vehicle with…
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Replacing Twin Electric Fan Radiator with Single Fan Radiator

Engine Design & Testing-Tushar Warkhade
Tata Technologies, Ltd.-Aashish Bhargava, Gaurav Soni
  • Technical Paper
  • 2019-28-2381
Published 2019-11-21 by SAE International in United States
Downsizing is one of the crucial activities being performed by every automotive engineering organization. The main aim is to reduce - Weight, CO2 emissions and achieve cost benefit. All this is done without any compromise on performance requirement or rather with optimization of system performance.This paper evaluate one such optimization, where-in radiator assembly with two electric fan is targeted for downsizing for small commercial vehicle application. The present two fan radiator is redesigned with thinner core and use of single fan motor assembly. The performance of the heat exchanger is tested for similar conditions back to back on vehicle and optimized to get the balanced benefit in terms of weight, cooling performance and importantly cost. This all is done without any modification in vehicle interface components except electrical connector for fan. The side members and brackets design is also simplified to achieve maximum weight reduction.Further Cooling system performance of engine is evaluated along with Fuel efficiency; results are compared with present configuration.
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Design & Development of Advanced 48 V Electrified Powertrain for Meeting Future CO2 Emission Requirements

Mercedes-Benz R&D India Pvt Ltd.-Chandrakant Palve, Pushkaraj Tilak
  • Technical Paper
  • 2019-28-2487
Published 2019-11-21 by SAE International in United States
Environmental Protection Agency (EPA) study indicates that a typical passenger vehicle emits about 4.6 metric tons of carbon dioxide per year. ICCT (International Council on Clean Transportation) establishing fleet-average emissions targets of 95 g & 175 g CO2 per kilometer for passenger cars & light commercial vehicles respectively. In view of the same, extensive work has been executed for implementation of 48 V electrified drivetrain technology, which plays an important role to meet stringent CO2 emission norms. A 3-phase permeant magnet Electric Motor and associated inverter, including the Packaging of the battery, for a P3 hybrid rear drive vehicle was developed. The requirements, relating to design of 48 V drivetrain technology, power and duty cycle has been extensively addressed in the paper. The Objective of paper to propose low cost, lightweight & compact solution to Global Automotive industry, which will play an important role to mitigate stringent CO2 emission norms defined by EPA agency. The permanent magnet compact size Electric motor having rated capacity of 28 kW & torque of 74 Nm supplied by a…
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A Philosophy of Full Vehicle Simulation for analysing the Road NVH Problems

Altair Engineering India Pvt Ltd-Azan Parmar
Altair Engineering India Pvt , Ltd.-Hari Krishna Reddy
  • Technical Paper
  • 2019-28-2491
Published 2019-11-21 by SAE International in United States
Road and Engine borne noise are the most prominent sources of noise in any commercial vehicle. With advancement in technology and encouraging prospects in hybrid & electric vehicles, road noise can be set aside as the single most dominant source for vehicular NVH problems. In this paper, a full vehicle model is considered for complete NVH simulation with two acoustic and two structural response points. Random road excitations are applied at various vehicle speeds to determine the response characteristics. An elaborate study is conducted to understand the effects of vehicle speed and road conditions on the vehicle. An attempt is also successfully made to diagnose the effects of road excitations on the system behaviour by considering the suitable transfer functions. The methodology can be readily extended to any type of vehicle and speed as the excitations are independent of these parameters. Further, full vehicle model is examined to evaluate the panel and modal participation to the random response obtained
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Development of Low Cost Lifesaving System for Automotive Vehicles during Road Accidents

Tata Technologies, Ltd.-Sachin Madhukarrao Pajgade, Aashish Bhargava
  • Technical Paper
  • 2019-28-2460
Published 2019-11-21 by SAE International in United States
Vehicular accidents are life-threatening and result in fatal casualties in developing country such as India. According to estimates, traffic accidents kill more people in India than diseases like Cancer and AIDS. More than 150,000 people are killed every year in traffic accidents in India, which works out to 400 fatalities a day, far higher than developed auto markets like the U.S., which had logged about 40,000 deaths in 2016. The World Health Organization estimates road accidents cost most countries about 3 per cent of their gross domestic product.India being the fastest growing economy will be the world’s third-largest car market after China and the U.S. by 2020, according to automobile researchers.According to research study most of death cause due to not getting help on time to the injured person. Research has proven that if injured person is not found any option of help then they also lose the power to fight such critical situation due to psychological effect. When vehicle met accident, people are not getting on time support, this delay is the major cause…
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Model Based Design of Chassis-Frame with MATLAB

VE Commercial Vehicles, Ltd.-Rishabh Singh Parihar, Gaurav Sharma, Nitinkumar prabhakar Patil, Yogendra Aniya
  • Technical Paper
  • 2019-28-2429
Published 2019-11-21 by SAE International in United States
In the current commercial vehicles market, ride-comfort and handling are crucial parameters for the customer and end user. There are various aspects which determine the vehicle behavior. One of aspects is the structural rigidity of the vehicle, which has its own effect on vehicle dynamics. To meet the required stiffness of the main structural component of the vehicle i.e. chassis frame, FEA analysis has to be done in current methodology. The number of iterations have to be done to build an appropriate model with low weight, which can meet the design requirements. At first, conceptual design mock-up unit is to be developed then FEA (CAE) analysis to be done on it. If any design criteria are not met, then this cycle repeats again until it fulfils the required stiffness.Today, the direct stiffness procedure is the basic principle of almost every FEA software package. In this paper, computer code based on MATLAB software is provided and presented for the analysis of the chassis frame using the direct stiffness method. The code, models a structure of the…
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Inspection and Maintenance of In-Use Motor Vehicles – Mitigating Environmental impact

International Centre for Automotive Technology-Vijayanta Ahuja, Aditya Gautam
  • Technical Paper
  • 2019-28-2427
Published 2019-11-21 by SAE International in United States
The existing rule no. 62 of CMVR, 1989 applies to various commercial vehicles and yet is unable to provide a promising template to have a concise format which will cover all the motor vehicles and their different components with more precise equipment plus virtual testing along with proper management of time during the bulk inspection of all the vehicles. This paper will include all the technicalities and the different course of actions which must be taken into account for the proper implementation of the desired regulations on the designated concern. The idea behind this paper is to have a compact procedural document for the periodical inspection and maintenance of all the motor vehicles running on the Indian Roads that adhere to the basic safety concerns of other on-road vehicles, the pedestrians and the surroundings. Concluding the fact that there are various aspects of environmental degradation henceforth we start by picking one of the hazards trying to execute a method to resolve every respective issue on a micro level, thus eliminating maximum threats onto the environment.…
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Optimization of Compression Ratio for DI Diesel Engines for Better Fuel Economy

Tata Technologies, Ltd.-Sujit Gavade, Aashish Bhargava, Gaurav Soni, Chandrakant Deshmukh
  • Technical Paper
  • 2019-28-2431
Published 2019-11-21 by SAE International in United States
Fuel economy is becoming one of the key parameter as it does not only account for the profitability of commercial vehicle owner but also has impact on environment. Fuel economy gets affected from several parameters of engine such as Peak firing pressure, reduction in parasitic losses, volumetric efficiency and thermal efficiency. Compression ratio is one of key design criteria which affects most of the above mentioned parameters, which not only improve fuel efficiency but also results in improvement of emission levels.This paper evaluates the optimization of Compression ratio and study its effect on Engine performance.The parameters investigated in this paper include combustion bowl volume in Piston and Cylinder head gasket thickness as these are major contributing factors affecting clearance volume and in turn the compression ratio of engine. Based on the calculation results, an optimum Compression Ratio for the engine is selected. Further Engine testing carried out with selected Compression ratios and parameters such as Fuel efficiency, In-cylinder pressure, and Brake thermal efficiency and Ignition delay were compared.
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An analysis of the Fuel Cell Pack with Different Drive Cycles

VE Commercial Vehicles, Ltd.-C Venkatesh Chandrasekar, L R Amruth Kumar
  • Technical Paper
  • 2019-28-2510
Published 2019-11-21 by SAE International in United States
In the view of an eco-friendly environmental future, the major automotive manufacturers are making a move towards electric mobility. The electric vehicle helps to achieve Zero-emission. However, there are some limitations too. The zero-emission Battery electric vehicle (BEV) can provide a limited range only; the market penetration is getting difficult because of an energy storage capability. The addition of an electric vehicle with a fuel cell unit and a hydrogen supply unit can increase the range and the energy capacity of the system. Fuel cell electric vehicle (FCEV) system is faster to refill compared to plug-in Battery electric vehicle (BEV).This study deals with a behavioral analysis of Polymer Electrolyte Membrane (PEM) Fuel cell; with different drive cycles. In this, a fuel cell model developed and simulated in the SIMULINK environment with different drive cycle and results were obtained. The fuel cell controls also were analyzed for the city start/stop cycle.The results obtained from the different drive cycles simulations were analyzed and discussed in this paper. Also, the fuel cell system behavioral analysis experimented on the…
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