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2016-02-01
Technical Paper
2016-28-0177
Sreedeep Thiyya Kkandiyil, Monish M. H. Gowda, Hima Kiran Venna
Abstract Vehicle dynamics is one of the important domains in the automotive field. It is the study of performance, ride and handling of the vehicle. The design of steering system, suspension system and front axle plays an important role in achieving good ride and handling characteristics of the vehicle. The wheel geometry is one of the suspension parameter that affects handling characteristics of the vehicle. Hence proper selection of wheel geometry angles such as caster, camber, toe, steering angle inclination and scrub radius plays an important role in suspension design. In this thesis work study has been conducted to analyze the influence of steering axis inclination and scrub radius on steering effort of passenger car. This study helps in selecting proper steering axis inclination and scrub radius with a goal of achieving lesser steering effort. Multi body dynamic model of selected passenger car has been built using ADAMS Car.
2016-02-01
Technical Paper
2016-28-0195
Bibin Alias, Eswar Kurukundu, Savitha Nandagudi
Abstract A simplified mathematical model of tandem suspension is presented to study the different parameters of tandem suspension. The equations of motion are compiled considering the system to be 3 degrees of freedom system, taking into accounts both oscillation and deflection of the leaf spring. The response characteristics for vibration isolation for the company test track road profiles at different speeds of the vehicle are calculated. The sensitivity of acceleration to variations in un-sprung masses and axle spacing is illustrated. Further, the usefulness of the model for studying the effect of shock absorber positioning on ride of tandem bogie suspension system is demonstrated.
2016-02-01
Technical Paper
2016-28-0194
Srikanta Nahak, Sagar Bhojne
Abstract Earth moving machines are steered using various steering methodology. Articulated steering mechanism is the most popular type of steering methods. It is actuated by hydraulic cylinders connected to the steering linkages. While the machine is deployed with articulated type steering, vehicle stability is proportionate to the steering velocity. Articulated steering provides two important features, shorter turning radius, allows front and back axle to be solid. Directional stability refers to a vehicle’s ability to stabilize its direction of motion against disturbances. Majority of earth moving equipment operates on basic cycle of Load-Haul-Dump. During each cycle, vehicle needs to be steered at least once. To optimize the machine performance for improved productivity it is essential to study the correlation between articulation speed and operational weight of the vehicle.
2016-02-01
Technical Paper
2016-28-0185
Narayan Venkitachalam, David Neihguk, Gurdeep Singh Pahwa, Parth Lunia, Abhinav Prasad, J Perumal
Abstract The excitation to a vehicle is from two sources, road excitation and powertrain excitation. Vehicle Suspension is designed to isolate the road excitation coming to passenger cabin. Powertrain mounts play a vital role in isolating the engine excitation. The current study focuses on developing an analytical approach using Low-Fidelity computer programs to design the Powertrain Mount layout and stiffness during the initial stage of product development. Three programs have been developed as a part of this study that satisfy the packaging needs, NVH requirements and static load bearing requirements. The applications are capable of providing the Kinetic Energy Distribution and Static Analysis (Powertrain Enveloping and Mount Durability) for 3-point and 4-point mounting systems and the ideal mount positions and stiffness for 3-point mounting systems.
2016-02-01
Technical Paper
2016-28-0178
Santosh Shankara Murthy, Monish M. H. Gowda, Hima Kiran Venna
Abstract Vehicle dynamics is the study of response of the vehicle to driver’s input. Various parameters like location of center of gravity (CG), suspension spring stiffness, wheel alignment parameters, etc. determine the handling behavior of the vehicle. This is a study to investigate the effects of aforesaid parameters on handling characteristics of an intercity bus using MSC ADAMS software tool. Handling performance is determined by evaluating various parameters such as understeer gradient, roll gradient, etc. Understeer gradient is influenced by various parameters like location of CG, tire cornering stiffness, etc. Roll gradient of a vehicle depend on various parameters like vertical stiffness of tires, anti-roll bars (ARB) diameter, location of CG, etc. As a part of this study, four different configurations of MBD models were built to investigate the effect of location of ARB on handling behavior of bus.
2016-02-01
Technical Paper
2016-28-0203
Krishnakanth Pandurangan, Hima Kiran Vithal Venna, Vinod Banthia
Abstract Exposure to high level of vibrations encountered in driver’s cabin of heavy duty truck over extended time causes driver fatigue and leads to serious health disorders. In most of the current heavy duty trucks in India, absence of proper vibration isolation system for driver’s seat results in transmission of high levels of vibration to the driver. A proper seat isolation system, combined with proper cushioning of seat can considerably reduce vibration transmissibility to the driver. The work presented here addresses the problem of vibration levels in a heavy duty truck and proposes solution for reducing vibration transmissibility to driver seat by using isolation and cushioning system. Vibration levels on floor, driver’s seat and seat back of an existing truck were measured using tri-axial accelerometer and 9 channel spectrum analyzer. Measured vibration levels in the vertical direction were found to be exceeding comfortable level.
2016-02-01
Technical Paper
2016-28-0198
Joydeep Chatterjee, Harveen Talwar, Srishti Garg
Abstract In a typical passenger vehicle, there can be different types of noises generated which are broadly categorized as Interior Noise and Exterior Noise. The interior noise sources can be further classified into noises which can be Structure Borne or Air Borne. One of the major sources of both structure borne and airborne noise generation is the powertrain of the vehicle. The structure-borne noise and vibrations generated from the powertrain is usually transferred to the vehicle body through its attachment points to the body and the powertrain driveline. These induced body vibrations can sometimes cause the acoustic cavity of the passenger cabin to go into resonance which results in an annoying and disturbing noise for the passengers, called Booming Noise. Very often, one or more than one vehicle body panels show a dominant contribution in inducing this acoustic cavity resonance.
2016-02-01
Technical Paper
2016-28-0210
Abhishek Sinha, Kamlesh Yadav, Rajdeep Singh Khurana
Abstract The biggest challenge in vehicle BIW design today is to make a light, cost effective and energy absorbing structure. With the increasing competition as well as increasing customer awareness, today’s vehicle has to satisfy several aesthetic and functional requirements besides the mandatory regulatory requirements. While working on global platform, it is challenging to comply with both pedestrian protection and low speed bumper impact (ECE-R42) and at the same time meeting the styling intent of reducing the front overhang. Pedestrian lower leg compliance demands space between bumper member and bumper, a condition that reduces the space available for energy absorption during low speed impact (ECE-R42). Therefore, reduction in front overhang poses a problem in meeting both the requirements with limited space.
2016-02-01
Technical Paper
2016-28-0149
Hemant Pratap Singh, Pulkit Sagar, Kartikey Singh
Abstract This paper deals with the problems which emanates in front of society in developing electric vehicles. Aim of this paper is to prepare ways through which we can develop electric vehicle with efficiency (more than 60%). So that these electric vehicles can substitute I.C engine vehicles, which are main cause of environment pollution. To achieve that goal, various competitions are arranged in which one sitter kart develop to ease mechanical constraints and easily utilize innovations in kart. To develop kart various type of modelling and simulation were done on INVENTOR and ANSYS 14.0. Different type of test were also taken into account like Brake test, Speed test, Power test, Load test, and efficiency test. This paper also motivates student in developing vehicles so that they can excel their knowledge and assist in research of electric vehicles.
2016-01-22
WIP Standard
J3016
This Recommended Practice provides a taxonomy for motor vehicle driving automation systems that perform part or all of the dynamic driving task (DDT) on a sustained basis and that range in level from no automation (level 0) to full automation (level 5). It provides detailed definitions for these six levels of driving automation in the context of motor vehicles (hereafter also referred to as “vehicle” or “vehicles”) and their operation on roadways. These level definitions, along with additional supporting definitions provided herein, can be used to describe the range of driving automation systems equipped on motor vehicles in a functionally consistent and coherent manner. “On-road” refers to publicly accessible roadways (including parking areas and private campuses that permit public access) that collectively serve users of vehicles of all classes and automation levels (including no automation), as well as motorcyclists, pedal cyclists, and pedestrians.
2016-01-20
WIP Standard
J33
This SAE Recommended Practice sets forth accepted definitions and terminology of major components and parts peculiar to snowmobiles. Illustrations have been selected to identify functional characteristics and to identify common mechanisms. They are not intended to show all existing commercial machines or to be exactly descriptive of any particular machine. These criteria were prepared to facilitate clear understanding and promote uniformity in snowmobile nomenclature.
2016-01-15
WIP Standard
J1121
This recommended practice has been developed to assist engineers and designers in the preparation of specifications for the major types of helical compression and extension springs. It is restricted to a concise presentation of items which will promote an adequate understanding between spring manufacturer and spring user of the major practical requirements in the finished spring. Closer tolerances are obtainable where greater accuracy is required and the increased cost is justified. For the basic concepts underlying the spring design and for many of the details see the SAE Information Report MANUAL ON DESIGN AND APPLICATION OF HELICAL AND SPIRAL SPRINGS, SAE HS 795, which is available from SAE Headquarters in Warrendale, PA 15096. A uniform method for specifying design information is shown in the TYPICAL DESIGN CHECK LISTS FOR HELICAL SPRINGS, SAE J1122.
2016-01-14
Standard
J3061_201601
This recommended practice provides guidance on vehicle Cybersecurity and was created based off of, and expanded on from, existing practices which are being implemented or reported in industry, government and conference papers. The best practices are intended to be flexible, pragmatic, and adaptable in their further application to the vehicle industry as well as to other cyber-physical vehicle systems (e.g., commercial and military vehicles, trucks, busses). Other proprietary Cybersecurity development processes and standards may have been established to support a specific manufacturer’s development processes, and may not be comprehensively represented in this document, however, information contained in this document may help refine existing in-house processes, methods, etc. This recommended practice establishes a set of high-level guiding principles for Cybersecurity as it relates to cyber-physical vehicle systems.
2016-01-06
Article
The $1 billion venture, funded for five years, will focus on autonomous vehicle technologies, artificial intelligence, materials science, robotics, and more.
2016-01-06
Magazine
Time to get personal Industry engineers are combining apps, voice, the cloud, and other technologies such as artificial intelligence to enable drivers to customize their vehicles and anticipate their needs. Technology report GM and TARDEC co-developing fuel cell powered Chevrolet Colorado for military evaluation vehicles and anticipate their needs. Global vehicles Sports cars take center stage in Tokyo
2016-01-02
Standard
AS1990D
The purpose of this SAE Aerospace Standard (AS) is to provide a description of the temper nomenclature system for aluminum alloys used in the aerospace industry by combining information from different sources for the benefit of the user.
2015-12-31
Book
Alex Krulikowski
The ISO GPS Ultimate Pocket Guide explains the most common rules, symbols, and concepts in the ISO Geometrical Product Specifications System. Written by standards expert Alex Krulikowski, this valuable on-the-job reference clarifies how to interpret standard-compliant technical drawings that use ISO 1101:2012 and its companion published standards. More than 15 standards were directly reviewed and more than 30 standards indirectly used in creating the book. One entire section is devoted to a quick comparison of ASME and ISO standards. Author's comments throughout the text provide insights about concepts and how to apply or interpret tolerancing in a cost-effective manner. Drawing interpretation is simplified because the tolerancing information is in one place, logically arranged, with illustrations of each concept.
2015-12-31
WIP Standard
J670
The vehicle dynamics terminology presented herein pertains to passenger cars and light trucks with two axles and to those vehicles pulling single-axle trailers. The terminology presents symbols and definitions covering the following subjects: axis systems, vehicle bodies, suspension and steering systems, brakes, tires and wheels, operating states and modes, control and disturbance inputs, vehicle responses, and vehicle characterizing descriptors. The scope does not include terms relating to the human perception of vehicle response.
2015-12-22
Article
Nominations for the fourth annual Altair Enlighten Award are now being accepted, with the 2016 award program including two distinct categories recognizing vehicle lightweighting: full vehicles and modules.
2015-12-19
Standard
AS6163
This SAE Aerospace Standard (AS) defines the minimum performance standard to demonstrate compliance with the regulatory design, test and operational requirements for a Temperature Controlled Container (TCC).
2015-12-17
WIP Standard
AS6171/17
This document defines capabilities and limitations of LSM and CLSM as they pertain to counterfeit electronic component detection and suggests possible applications to these ends. Additionally, this document outlines requirements associated with the application of LSM and CLSM including: operator training, sample preparation, various sampling techniques, data interpretation, equipment maintenance, and reporting of data. This test method is primarily directed to analyses performed in the visible to near infrared (400nm to 1100nm approximately). If SAE AS6171/17 is invoked in the contract, the base document, AS6171 General Requirements shall also apply.
2015-12-17
Standard
J1698/3_201512
This SAE Recommended Practice defines procedures intended to be used to validate that relevant EDR output records conform within specified limits to measured sensor input to the device.
2015-12-16
Article
Two upstart Chinese companies with big automotive ambitions are grabbing headlines as they lure top engineering and product-development talent— and prepare to unveil potentially disrupting new products and technology strategies.
2015-12-04
Article
Citroën is developing a new suspension that will replace its hydraulic system. The French OEM known for its engineering creativity and quirky models may re-enter the North American market, says its CEO.
2015-12-03
Standard
J3077_201512
This document provides a summary of the activities to-date of Task Force #1 - Research Foundations – of the SAE’s Driver Vehicle Interface (DVI) committee. More specifically, it establishes working definitions of key DVI concepts, as well as an extensive list of data sources relevant to DVI design and the larger topic of driver distraction.
2015-12-01
Magazine
Hot-stamping process Hot-stamping process from Schuler employs flexible 'pressure controlled hardening' Fuel cell futures no longer a dream Fuel cell technology is catching up with the hype as fuel cell vehicles become reality. Hot Technologies 2016 Our annual review of significant, innovative, and just plain cool technology applications for the new model year.
2015-12-01
Magazine
Uncertainty quantification The technique is a must for next-generation simulation tools. Oil-pump sizing Researchers from Hinduja Tech investigate options for low friction and power consumption. The future of Indian commercial aviation The growth in traffic that airport modernization has supported has also made a significant contribution to the local and national economies, while the improved infrastructure has been positive for the perception of India in the global market. Driving EVs toward lower cost The race ison to reduce battery and electric-drive systems cost while improving efficiency. Powering on Rolls-Royce's Chief Engineer discusses new technologies that inspire current R&D design and evaluation work as part of its strategic roadmap for future big commercial programs. HMIs extend beyond the cab Telematic functions are being integrated into multi-function user interfaces.
2015-11-27
Magazine
Electronics arms race hots up The automotive supply chain landscape is undergoing huge transformation. Dr. Elmar Dagenhart, chairman of the executive board, Continental AG, explains how his company plans to be right at the forefront Sizing up the down-sizing challenge With the impact of VW's 'Dieselgate' still being felt widely, the Aachen automobile and engine technology Colloquium was particularly pertinent this year. Ian Adcock reports on the most significant technologies and presentations. Double coupe coup! Automotive Design'sIan Adcock reflects on some of the concept cars from 2015 that caught his eye Fuelling a sustainable future What is the best route for the UK to achieve its targeted 80% reduction in greenhouse gas emissions?
2015-11-25
WIP Standard
J3115
This document aims to establish best practices in equipment setup and measurement of brake rotor disk thickness variation (DTV) on vehicle.
Viewing 211 to 240 of 13421

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