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Viewing 211 to 240 of 10219
2015-01-14
Technical Paper
2015-26-0167
Thomas Lich, Girikumar Kumaresh, Joerg Moennich
Abstract Motorized two wheelers, also known as powered two wheelers (PTW) are the most common mode of transportation in India. Around one in four deaths that occurred on the roads in India in 2012 involved a motorcyclist, according to Ministry of Road Transport and Highways. This constitutes the highest contributor for fatal accidents in India [1]. The European Transport Safety Council (ETSC) analysis shows the risk of a motorcyclist having a fatal accident is 20 times greater than for a car driver travelling the same route [2]. An investigation conducted by Bosch looked at the accident database of Road Accident Sampling System for India (RASSI). This investigation revealed interesting facts about the Indian motorcycle accident situation, such as root causes of powered two wheeler collisions and riders behaviour including their braking patterns during the pre-crash phase of the accident.
2015-01-14
Technical Paper
2015-26-0221
Jitesh Agrawal
Abstract Suspension is used in heavy duty vehicles to provide sufficient safety to vehicle and passengers from shocks transmitted directly from road. In commercial vehicles, leaf spring suspension used for height load carrying capability in commercial vehicle. The purpose of suspension is not only comfort and load carrying but also to support handling of vehicle however, few suspension characteristics may disturb the same on turning, braking and bouncing. One of the characteristics which disturbs on braking is brake steering where vehicle itself steers on braking and can be a major cause for life threatening accidents on highways and express ways. Optimization of this spring characteristics is quite challenging as one has to play between passenger comfort and handling of vehicle. In this paper, such behavior is studied analytically in detail. In addition, the effect of same on design parameters is studied and thereby recommendation is derived.
2015-01-14
Technical Paper
2015-26-0215
T Sukumar, Murugan Subramanian, Sathish Kumar Subramaniyan, Nandakumar Subramanian
Abstract Reliable sealing solutions are extremely important in commercial vehicle industry because sealing failures can cause vehicle breakdown, damage of equipment or even accident, incurring expenses that are substantially higher than the costs of just replacing the damaged seals. Consequently, new seal designs must be experimentally verified and validated before they can be implemented. In this study, Mooney - Rivlin hyper elastic material model is used to simulate the sealing behavior during dynamic conditions. The seal under study is a large diameter lip seal made of Neoprene® rubber (NBR) A finite element model to study the response of the seal under dynamic conditions was developed. The analysis took into account the mating parts dimensions and the lip seal parameters. Three designs were proposed and verified. The seal design is optimized using non-linear FEA and validated. Results include contact pressure, deflection and strain experienced by the seal during actuation.
2015-01-14
Technical Paper
2015-26-0205
N. Prabhakar, Suresh Gayakwad J, P. Lingeswaramurthy, P.S. Lakshman
Abstract The present investigation deals with the design and shape optimization of the steel insert used in the hand brake valve to withstand the impact load during brake off condition. This hand brake valve is used in the vehicles for parking brake application. It consists of a steel insert with a helical coil spring for locking and unlocking of a lever during brake on and off condition. Also a torsion spring with a cam mechanism is used for opening and closing of a hand brake valve. When the lever is locked the flexible elastic object (torsion spring) stores the mechanical energy when it is twisted. When it is unlocked (braking off) it exerts a force (actually torque) in the opposite direction, proportional to the angle it is twisted. During the braking off condition the steel insert gains the angular velocity from the stored mechanical energy of the torsion spring.
2015-01-14
Technical Paper
2015-26-0068
Muthuraj Ramasamy, Vignesh E, Sundararajan Thiyagarajan
Abstract A “WHEEL” is one of those auto component in a vehicle which necessitates equal attention from safety, ergonomics and aesthetic perspectives. A conventional tube type wheel for commercial vehicles is made of steel with steel side rings (multi-piece construction). In course as headway in wheel design the single piece wheels were developed which used the tubeless tires. These wheels were made available in both steel and aluminum versions. Wherein the aluminum wheels were lighter in weight than steel, aesthetically more appealing and had other significant advantages. Despite the advantages of these tubeless tire wheels, the end user had to invest for both wheels and tubeless tires to replace conventional tube type steel wheels. The retro-fitment calls for higher exchange cost of wheel and tire and this process stands to be more capitalistic to the end user wherein the payback period was longer.
2015-01-14
Technical Paper
2015-26-0206
Nikhil Mule, Dattatraya Pilane, Prashant Mahale, M P Raajha
Abstract Brake is a critical safety aspect of an automobile and hence its failsafe design is of prime importance. Modern vehicles, especially cars and SUVs, with high speed and high acceleration capacities require the braking system also to be equally robust and stable in all critical driving conditions. Typically, during braking, front brakes take up higher torque than rear brakes due to vehicle dynamics and associated load transfers. Generally, these are disc brakes using cast iron rotors. Rotor absorbs heat energy generated during braking and dissipates it into components in its vicinity and largely, into surrounding air. Due to stringent target of overall reduction in weight and cost of an automobile, rotors are fairly optimized on these aspects with a balance of needed braking performance. This optimization in weight of rotor limits the thermal absorption equally of rotor i.e heat dissipation.
2015-01-14
Technical Paper
2015-26-0186
Mohitkumar R. Chauhan, Girish Kotwal, Abhijeet Majge
Abstract The major concern in design of wheel is their potentiality to bear impact loads. Therefore, wheel impact test is required to fulfill the safety requirement. In this study, there are two objectives; first, the simulation of impact test for wheel is developed according to SAE wheel impact test. Often when vehicle interacts with guardrails, bridge rails and curbs the interaction between roadside hardware and wheel causes wheel damage. The test setup consists of vertically acting striker of mass 480 kg and having prescribed velocity. Energy based approach and total plastic work concept of ductile fracture mechanics is used to predict wheel impact failure. Explicit finite element method is used to investigate stress and displacement distribution and to obtain strain energy density of wheel at impact. Design modification is applied to the wheel to improve its impact performance. Simulation results are compared with experimental results.
2015-01-12
Article
Oxford Performance Materials launched in December the first two grades of its OXFAB 3-D printing technology—OXFAB-N and OXFAB-ESD—suitable for aerospace and other industrial markets, including transportation, energy, and semiconductor applications. The company claims this is the first time PEKK is being used for 3-D printing in aerospace and industrial applications.
2015-01-05
Article
Current products from 3M can be used to repair aluminum- and carbon fiber-intensive vehicles, but the company is working with OEMs such as General Motors to develop optimized solutions for multi-material structural applications.
2014-12-29
Article
Packing a 640-hp supercharged LT4 V8 under its muscular, CFD-designed hood, Cadillac's new performance flagship strikes many developmental balances, said Chief Engineer Tony Roma.
2014-12-17
Article
At any one time, up to 80 new steel grades are under development at ArcelorMittal. The person responsible for these advanced-development activities is Greg Ludkovsky, Vice President of Global R&D. Ludkovsky spoke with Automotive Engineering this fall at the AM/NS Calvert plant in Alabama, which the company touts as “the world’s most advanced steel finishing facility.”
2014-12-05
Article
Renesas Electronics’ new RH850/P1x-C series is a high-end version of its RH850/P1x series of 32-bit automotive microcontrollers.
2014-12-03
Standard
J1603_201412
This SAE Standard describes the performance and part requirements for elastomeric seals used in highway vehicle disc brake calipers. Seals covered by this specification may be the solid section type (square, rectangular, O-ring, etc.) mounted stationary in the cylinder bore or on the movable piston. The specification contains the following major sections:
2014-12-01
Standard
AIR4243A
This document discusses the work done by the U.S. Army Corps of Engineers and the Waterways Experiment Station (WES) in support of SAE A-5 Committee activity on Aerospace Landing Gear Systems. It is an example of how seemingly unrelated disciplines can be combined effectively for the eventual benefit of the overall aircraft systems, where that system includes the total airfield environment in which the aircraft must operate. In summary, this AIR documents the history of aircraft flotation analysis as it involves WES and the SAE.
2014-12-01
Standard
ARP6265
This document describes a recommended test procedure to assess the burst characteristics of tires used on 14CFR Part 25 or similar transport airplanes.
2014-11-30
Magazine
Riding on a high Rudi Schurmans and Ben Patel head up Tenneco's suspension and clean air divisions. Ian Adcock discovers what the automotive future holds for them Driverless revolution has begun! Breakthrough Photonic radar promises greater accuracy at lower cost, Ian Adcock discovers Winds of change are here Simulating aerodynamics will make a step-change in vehicle design, as Stephen Remondi, President and CEO of EXA, explains to Ian Adcock
2014-11-26
Standard
J1605_201411
This SAE Standard covers performance requirements and methods of test for master cylinder reservoir diaphragm gaskets that will provide a functional seal and protection from outside dirt and water.
2014-11-25
Standard
J267_201411
This SAE Recommended Practice provides minimum performance requirements and uniform laboratory procedures for fatigue testing of wheels and demountable rims intended for normal highway use on trucks, buses, truck-trailers, and multipurpose vehicles. Users may establish design criteria exceeding the minimum performance requirement for added confidence in a design. The cycle requirements noted in Tables 1 and 2 are based on Weibull statistics using 2 parameter, median ranks, 50% confidence level and 90% reliability, and beta equal to 2, typically noted as B10C50. For other wheels intended for normal highway use and temporary use on passenger cars, light trucks, and multipurpose vehicles, see SAE J328. For wheels used on trailers drawn by passenger cars, light trucks, or multipurpose vehicles, see SAE J1204. For bolt together military wheels, see SAE J1992. This document does not cover other special application wheels and rims.
2014-11-24
Article
Kia says it calls the completely redesigned MY2015 offering a multipurpose vehicle, rather than a minivan, “because there’s nothing mini in here.”
2014-11-20
Article
TRW stockholders representing 79% of the company's shares outstanding have voted to allow the proposed acquisition of the company by ZF to proceed. Under the terms of the agreement, ZF will acquire TRW in an all-cash transaction valued at approximately $12.4 billion based on equity value.
2014-11-20
Article
Bridgestone Americas announced on Nov. 18 the opening of its off-highway radial tire plant in Aiken County, SC—the first plant of its kind for Bridgestone outside of Japan, according to a company spokesperson. 
2014-11-20
Standard
J2378_201411
This SAE Recommended Practice provides instructions and test procedures for air braked trailers and dollies used in single and multiple trailer combinations on highway. This document is not intended for off-highway application.
2014-11-20
Standard
AS4833A
This SAE Aerospace Standard (AS) sets forth criteria for the selection and verification processes to be followed in providing tires that will be suitable for intended use on civil aircraft. This document encompasses new and requalified radial and bias aircraft tires.
2014-11-18
Article
"Craft shop" approach of low-volume, all-aluminum, high-end makes is too restrictive for America's best-selling vehicle. SEMA Show training classes by I-CAR demonstrate special techniques necessary and the learning curve for mainstream body shop technicians.
2014-11-18
Standard
J1214_201411
The purpose of this SAE Recommended Practice is set guidelines for tire to wheel house and body clearances on recreational vehicles.
2014-11-15
Standard
J1713_201411
This SAE Recommended Practices specifies a procedure for determining structural strength and fatigue life of disc-brake caliper assemblies which are satisfactory for vehicle usage. It is applicable to new caliper assemblies which are employed in passenger car and truck brake systems utilizing hydraulic brake fluids. Brake design and vehicle performance requirements are not included. Specification limits are left to the discretion of the responsible manufacturer. This procedure was developed for base brake operation and does not consider some unusual effects of ABS (Anti-Lock-Brake System) or Traction Control systems which may have a significant effect on the caliper. Careful analysis of the particular type ABS and/or Traction Control should be made and additional tests may be required which are not included in this document.
2014-11-15
Standard
J1404_201411
This SAE Recommended Practice presents requirements for the structural integrity of the brake system of all new trucks, buses, and combinations of vehicles designed for roadway use and falling into the following classifications: a. Truck and Bus: Over 4500 kg (10 000 lb) GVWR b. Combination of Vehicles: Towing vehicle over 4500 kg (10 000 lb) GVWR The requirements are based on data obtained from SAE J294.
2014-11-15
Standard
J1476_201411
This SAE Recommended Practice establishes a method of evaluating the structural integrity of the parking brake system of all new trucks, buses, and combination vehicles designed for roadway use in the following classifications: TRACTOR, TRAILER, TRUCK, AND BUS: over 4500 kg (10 000 lb) GVWR.
2014-11-13
WIP Standard
AIR5358A
This SAE Aerospace Information Report (AIR) was prepared by a panel of the SAE A-5 Committee. This document establishes the specifications for fluids used in landing gear shock struts with extreme pressure and antiwear additives that have been added for improved lubrication.
2014-11-11
Standard
ARP1070D
This document outlines the development process and makes recommendations for total antiskid/aircraft systems compatibility. These recommendations encompass all aircraft systems that may affect antiskid brake control. It focuses on recommended practices specific to antiskid and its integration with the aircraft as opposed to more generic practices recommended for all aircraft systems and components. It defers to the documents listed in Section 2, for generic aerospace best practices and requirements. The documents listed below are the major drivers in antiskid/aircraft integration: 1. ARP4754, Guidelines for Development of Civil Aircraft and Systems 2. ARP4761, Guidelines and Methods for Conducting the Safety Assessment Process on Civil Airborne Systems and Equipment 3. RTCA DO-178, Software Considerations in Airborne Systems and Equipment Certification 4. RTCA DO-254, Design Assurance Guidance for Airborne Electronic Hardware 5.
Viewing 211 to 240 of 10219

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