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Toyota Motor Corp. (128) Ford Motor Co. (104) Nissan Motor Co., Ltd. (69) Ford Motor Company (64) Honda R&D Co., Ltd. (48) General Motors Corp. (35) Daido Metal Co., Ltd. (33) Taiho Kogyo Co., Ltd. (28) Chrysler Corp. (27) Hyundai Motor Co. (27) Mazda Motor Corp. (24) NOK Corp. (24) The Timken Co. (24) Toyota Motor Corporation (23) Denso Corp. (22) NOK Corporation (22) Politecnico di Torino (21) Southwest Research Institute (21) The Boeing Company (21) Nippondenso Co., Ltd. (20) Robert Bosch GmbH (20) University of Wisconsin-Madison (20) Argonne National Laboratory (19) Dana Corp. (19) General Motors Corporation (19) Massachusetts Institute of Technology (19) Mitsubishi Motors Corp. (19) University of Bath (19) Electroimpact, Inc. (18) Musashi Institute of Technology (18) Nippon Soken, Inc. (18) NSK Ltd. (18) Caterpillar Inc. (17) CR Industries (17) University of Michigan (17) Hyundai Motor Company (16) Schaeffler Brasil Ltda. (16) University of Tokyo (16) Aisin Seiki Co., Ltd. (15) Federal-Mogul Corporation (15) Research Laboratories, General Motors Corp. (15) Consultant (14) Sanden Corp. (14) The Timken Company (14) Chiba Univ. (13) Istituto Motori CNR (13) Isuzu Motors Ltd. (13) Mahindra & Mahindra, Ltd. (13) Beijing Institute of Technology (12)

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Engine and Airframe Technical Standards Committee (TSC) (3472) G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies (3267) E-25 General Standards for Aerospace and Propulsion Systems (2632) AE-8C1 Connectors Committee (997) AMS CE Elastomers Committee (275) ACBG Rolling Element Bearing Committee (187) AE-8D Wire and Cable Committee (185) AE-8C2 Terminating Devices and Tooling Committee (181) Fasteners Committee (167) AMS F Corrosion Heat Resistant Alloys Committee (157) ACBG Plain Bearing Committee (150) AMS E Carbon and Low Alloy Steels Committee (143) AMS D Nonferrous Alloys Committee (133) A-6C2 Seals Committee (111) AE-1 Engine Accessory Installations Committee (110) A-4 Aircraft Instruments Committee (96) Hydraulic Tube Fittings Committee (96) Hydraulic Hose and Hose Fittings Committee (79) SAE IC Powertrain Steering Committee (77) Non-Hydraulic Hose Committee (76) Materials, Processes and Parts Council (63) Piston and Ring Standards Committee (62) AE-7A Generators and Controls Motors and Magnetic Devices (61) Air Brake Tubing and Tube Ftg Committee (61) AMS G Titanium and Refractory Metals Committee (57) A-10 Aircraft Oxygen Equipment Committee (43) A-5B Gears, Struts and Couplings Committee (43) ACBG Airframe Control Bearings Group Committee (37) A-5A Wheels, Brakes and Skid Controls Committee (31) AE-6 Starting Systems and Auxiliary Power Committee (31) Truck and Bus Brake Supply and Control Components Committee (31) OPTC1, Personnel Protection (General) (30) Diesel Fuel Injection Equipment Standards Committee (29) EG-1B Hand Tools Committee (28) AE-5A Aerospace Fuel, Inerting and Lubrication Sys Committee (27) AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install (26) Ship Systems - Fasteners Committee (25) Circuit Protection and Switch Device Committee (23) A-5 Aerospace Landing Gear Systems Committee (22) Brake Fluids Standards Committee (22) Trailer Committee (21) Fuel Systems Standards Committee (20) G-3C, AS-EN Harmonization Committee (20) A-5C Aircraft Tires Committee (19) A-6C4 Power Sources Committee (19) A-6C5 Components Committee (19) AGE-4 Packaging, Handling and Transportability Committee (19) AMS CACRC Commercial Aircraft Composite Repair Committee (19) Metals Technical Executive Steering Committee (19) AMS B Finishes Processes and Fluids Committee (18)

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Magazine

Automotive Engineering® (5) Aerospace & Defense™ Technology (4) Off-Highway Engineering® (3) Digital Aerospace Engineering™ (1) MOBILITY ENGINEERING™ AUTOMOTIVE, AEROSPACE, OFF-HIGHWAY (1) Truck & Off-Highway Engineering™ (1)

Experimental Design for Characterization of Force Transmissibility through Roller Bearings in Electric Machines and Transmissions

  • Loughborough University - Jack Walker, Harry Questa, Stephen R. Bewsher, Mahdi Mohammadpour
  • AVL LIST GmbH - Christoph Schweiger, Martin Sopouch, Gunter Offner
  • Technical Paper
  • 2018-01-1473
Published 2018-06-13 by SAE International in United States
With the increasing stringent emissions legislation on internal combustion engines, alongside requirements for enhanced fuel efficiency as key driving factors for many OEMs, there are many research activities supported by the automotive industry that focus on the development of hybrid and pure Electric Vehicles. This change in direction from engine downsizing to the use of electric motors presents many new challenges concerning NVH performance, durability and component life. This paper provides an experimental investigation into the measurement of NVH characteristics in these new powertrains, thus characterising the structure borne noise transmissibility through the shaft and the bearing to the housing. A feasibility study and design of a new system level test rig have been conducted to allow for sinusoidal radial loading of the shaft, which is synchronised with the shaft’s rotary frequency under high-speed transient conditions in order to evaluate the phenomena in the system. In the present work, simulations of the rig were conducted using the commercial multi-body dynamics software, AVL EXCITE Power Unit, providing insight to the systems response to different types of…

In-situ Characterization of Vibrations from a Door Mounted Loudspeaker

  • Volvo Car Group - David Lennström
  • Technical Paper
  • 2018-01-1511
Published 2018-06-13 by SAE International in United States
In the automotive industry, there is an increasing need for gaining efficiency and confidence in the prediction capability for various attributes. A typical case is one component or sub-system being used in a number of car models of one vehicle platform. Many of these components are potential sources of noise, vibration and squeak and rattle. In order to provide an early prognosis, vibro-acoustic source characterisation in combination with the source-to-response transfer behaviour are required. This paper describes the process of predicting the vibrational behaviour due to a woofer, which could induce squeak and rattle, on a door panel. Blocked forces, determined indirectly by frequency response functions and operational accelerations in-situ, were used for quantifying the source activity. These forces, transferred to the time domain, were in a second step loaded on to a finite element model in order to predict the response with the same speaker mounted to another position in an upcoming car model. Prior to this, comparisons between the measured and simulated response for the same car model were made, with satisfying agreement.

NVH Aspect of Electric drives- Integration of Electric Machine, Gearbox and Inverter

  • AVL LIST GmbH - Mehdi Mehrgou, Inigo Garcia de Madinabeitia, Bernhard Graf, Franz Zieher, Christoph Priestner
  • Technical Paper
  • 2018-01-1556
Published 2018-06-13 by SAE International in United States
The rate in the electrification of vehicles has risen since last years and. Despite that, electric vehicles are quiet, NVH stays as a major aspect in vehicle development. The typical NVH issues are electric or gear whine from E-machine and Gearbox. Inverter also as a part of the system can contribute to noise, directly or by affecting E-machine. Simulation methodologies and CAE workflows are also developing to contribute to electric drives development. Front loading in the concept and layout design phase are necessary to avoid big NVH issues at the end of development. The authors previously presented a workflow for combining the electric and mechanical noise for electric drives for this front loading. Current paper shows the application of presented workflow for NVH simulation and validation for an Interior Permanent Magnet (IPM) Machine. There are two main other aspects relevant for NVH in electric drives, the gearbox and inverter. The inverter has two effects on NVH: it radiates noise itself, often not a significant source, but also creates an excitation supplied to the electric machine…

Influence of compressor recirculation valve and piping design on the acoustic response of a turbocharger

  • Borgwarner Turbo Systems Engineering - Nima Fard Afshar, Panagiotis Koutsovasilis
  • Technical Paper
  • 2018-01-1527
Published 2018-06-13 by SAE International in United States
Turbochargers are nowadays, with the emerging technology of downsized combustion engines, an essential part of automotive engines. Turbocharged engines must provide full boost pressure at low engine speed but also avoid over boost at high engine speed. This can only be achieved with a boost pressure control system, as it is the case by multi-stage boosting systems (e.g. R2S), which combine two or more Turbochargers with regulations valves. An integrated recirculation valve in the compressor housing (CRV) acts as a regulating feature in R2S systems. The recirculation process and the piping of such valves can be the root cause of various aero-acoustic problems. The aim of this paper is to conduct an acoustical comparison between three different CRV designs, as a part of centrifugal compressor stage. Investigated are different CRV and piping designs aiming at a compromise in terms of aero-acoustics and performance. The method used is a hybrid Computational Aero Acoustics calculation (CAA) consisting of Unsteady RANS (URANS) and acoustic evaluation. Firstly, the compressor stage is CFD modelled followed by locating the noise sources…

A Comprehensive Approach for Estimation of Automotive Component Life Due To Thermal Effects

  • FCA US LLC - Alaa El-Sharkawy
  • Technical Paper
  • 2018-37-0019
Published 2018-05-30 by SAE International in United States
Due to stringent environmental requirements, the vehicle underhood and underbody temperatures have been steadily increasing. The increased temperatures affect components life and therefore, more thermal protection measures may be necessary. In this paper, we present an algorithm for estimation of automotive component life due to thermal effects through the vehicle life. Traditional approaches consider only the maximum temperature that a component will experience during severe driving maneuvers. However, that approach does not consider the time duration or frequency of exposure to temperature. FCA engineers have envisioned a more realistic and science based approach to estimate component life based on vehicle duty cycles, component temperature profile, frequency and characteristics of material thermal degradation. In the proposed algorithm, a transient thermal analysis model provides the exhaust gas and exhaust surface temperatures for all exhaust system segments, and for any driving scenario. The input boundary conditions for exhaust gas temperature are obtained by interpolation of engine dynamometer test data. Computational Fluid Dynamics (CFD) tools provide air velocities for specific vehicle speeds. The heat transfer coefficients around exhaust surface…
new

Plain Bearing Selection for Landing Gear Applications

  • Aerospace Standard
  • AIR1594D
  • Current
Published 2018-04-18 by SAE International in United States

This document is intended to give advisory information for the selection of plain bearings and bearing materials most suitable for aircraft landing gear applications. Information included herein was derived from bearing tests and service experience/reports. Airframe/landing gear manufacturers, commercial airlines, the U.S. Air Force and Naval Air Systems Command provided input for the document.

new

FITTING, ELBOW, 90°, STANDARD AND REDUCER, FLARED, 37° SPHERICAL

  • Aerospace Standard
  • AS6099A
  • Current
Published 2018-04-18 by SAE International in United States

SCOPE IS UNAVAILABLE.

new

HOSE ASSEMBLY, PTFE, CRES REINFORCED, 3000 PSI, 400 °F, STRAIGHT TO 45°, FLARELESS, LIGHTWEIGHT

  • Aerospace Standard
  • AS116H
  • Current
Published 2018-04-18 by SAE International in United States

SCOPE IS UNAVAILABLE.

new

FITTING, CROSS, STANDARD AND REDUCER, 37° SPHERICAL, FLARED

  • Aerospace Standard
  • AS6103A
  • Current
Published 2018-04-18 by SAE International in United States

SCOPE IS UNAVAILABLE.

new

HOSE ASSEMBLY, PTFE, CRES REINFORCED, 3000 PSI, 400 °F, 45° TO 45°, FLARELESS, LIGHTWEIGHT

  • Aerospace Standard
  • AS118H
  • Current
Published 2018-04-18 by SAE International in United States

SCOPE IS UNAVAILABLE.