Criteria

Text:
Affiliation:
Display:

Results

Viewing 1 to 30 of 102
2010-04-12
Technical Paper
2010-01-0511
Taeyoung Han, Youngtae Kim
Aerodynamic forces are the result of various complex viscous flow phenomena such as three-dimensional turbulent boundary layer on the body surfaces, longitudinal vortices induced by three-dimensional boundary layer separation, and high turbulence caused by flow separations. Understanding the flow characteristics and, especially, how the aerodynamic forces are influenced by the changes in the vehicle body shape, are very important in order to improve vehicle aerodynamics (particularly for low drag shapes). The present study was an attempt to provide insights for better understanding of the complex three-dimensional flow field around a vehicle by observing the limiting surface streamlines and the surface pressure gradients in the stream-wise and the transverse directions. The main objective of this work is to provide a comprehensive diagnostic analysis of the basic flow features in order to learn more about the flow separations in three-dimensions.
2011-04-12
Journal Article
2011-01-0196
Hong Tae Kang, Abolhassan Khosrovaneh, Todd Link, John Bonnen, Mark Amaya, Hua-Chu Shih
Gas Metal Arc Welding (GMAW) is widely employed for joining relatively thick sheet steels in automotive body-in-white structures and frames. The GMAW process is very flexible for various joint geometries and has relatively high welding speed. However, fatigue failures can occur at welded joints subjected to various types of loads. Thus, vehicle design engineers need to understand the fatigue characteristics of welded joints produced by GMAW. Currently, automotive structures employ various advanced high strength steels (AHSS) such as dual-phase (DP) and transformation-induced plasticity (TRIP) steels to produce lighter vehicle structures with improved safety performance and fuel economy, and reduced harmful emissions. Relatively thick gages of AHSS are commonly joined to conventional high strength steels and/or mild steels using GMAW in current body-in-white structures and frames.
2010-04-12
Journal Article
2010-01-1205
Taeyoung Han, Kuo-Huey Chen, Bahram Khalighi, Allen Curran, Joshua Pryor, Mark Hepokoski
Virtual simulation of passenger compartment climatic conditions is becoming increasingly important as a complement to the wind tunnel and field testing to achieve improved thermal comfort while reducing the vehicle development time and cost. The vehicle cabin is subjected to various thermal environments. At the same time many of the design parameters are dependent on each other and the relationship among them is quite complex. Therefore, an experimental parametric study is very time consuming. The present 3-D RadTherm analysis coupled with the 3-D CFD flow field analysis takes into account the geometrical configuration of the passenger compartment which includes glazing surfaces and pertinent physical and thermal properties of the enclosure with particular emphasis on the glass properties. Virtual Thermal Comfort Engineering (VTCE) is a process that takes into account the cabin thermal environment coupled with a human physiology model.
2014-04-01
Journal Article
2014-01-1176
Shenouda Mekhael, Fadi Estefanous, Naeim Henein, Akram Zahdeh
Many approaches have been taken to determine the burning velocity in internal combustion engines. Experimentally, the burning velocity has been determined in optically accessible gasoline engines by tracking the propagation of the flame front from the spark plug to the end of the combustion chamber. These experiments are costly as they require special imaging techniques and major modifications in the engine structure. Another approach to determine the burning velocity is from 3D CFD simulation models. These models require basic information about the mechanisms of combustion which are not available for distillate fuels in addition to many assumptions that have to be made to determine the burning velocity. Such models take long periods of computational time for execution and have to be calibrated and validated through experimentation.
2008-05-13
Article
The two companies are strengthening their partnership in powertrains, extending it to hybrid controls. The move comes as Freescale hits a number of milestones during its transition to a new CEO.
2008-07-09
Article
Telematics appears poised for a solid market takeoff, but most industry representatives say that success will hinge on putting together a mélange of services that appeal to customers.
2011-08-26
Article
The companies will collaborate on an all-new hybrid propulsion system and component technologies for RWD, high-input-torque applications such as pickup trucks and SUVs.
2011-10-19
Article
The new inline three- and four-cylinder global engines feature modular design and will offer turbocharging and alt-fuel capability. They will ultimately replace three incumbent engine families.
2011-10-26
Article
When the Spark EV reaches select global markets in 2013, the car will use an A123 Systems battery pack.
2012-03-09
Article
The 2013 Cadillac XTS blends input from a number of sensors to enhance driver safety, moving the automaker a step closer to 360-degree sensing and setting the stage for semi-autonomous driving.
2012-02-08
Article
The 2013 midsize crossover SUV will offer seven energy-absorbing cushions including a front center airbag.
2012-02-08
Article
One of the U.K.'s top technology consultants sees a big future for range-extended hybrids and energy-recovery systems, but reducing battery and motor costs is a main priority.
2012-02-14
Article
How crowded is the "white space" around electrified-vehicle intellectual property? A veteran advanced-engineering expert says it's not as bad as you might think.
2012-04-25
Article
The world's roads will be dramatically more congested in 2050 than today when 2 billion vehicles hit the streets.
2012-04-26
Article
The government and automakers don't always see eye-to-eye, but during a panel discussion at the SAE 2012 World Congress the only thing causing eyes to cross was the inability to predict future fuel prices.
2012-04-26
Article
The looming LEV III standards, which include a potential drop of particulate matter emissions to an almost imperceptible 1 mg/mi by 2025—loom like dark clouds over powertrain engineers working on gasoline direct injection (GDI) and diluted/lean-burn combustion technologies, as well as advanced diesels.
2012-04-27
Article
Yes, whopper-sized engines are still around, but even engineers admit there is a lot to like about smaller displacement engines.
2012-09-20
Article
GM and Ford will again collaborate on transmission development, building on their great success with the GMF (6T70/75) and 6F 6-speed automatics.
2012-09-20
Article
After years in lithium-ion battery development—and fed up over material costs that remain punishingly high—Subash Dhar decided the original automotive battery chemistry still has big potential for hybrid vehicles.
2012-11-28
Article
GM's first battery-electric vehicle debuts at the 2012 L.A. Auto Show with a $25,000 base price, optional dc quick charging capability, and sub-8-s 0-60 mph acceleration.
2012-08-30
Article
Reducing a vehicle's mass opens the door for a downsized engine and transmission, a lighter cradle and body structure, smaller wheels and brakes, as well as a weight-slimmed suspension. The start point for this ripple effect is materials.
2009-08-05
Article
While modeling and simulation tools still have some obstacles to overcome, they are letting engineers try many innovative techniques without spending money on prototypes.
2009-09-14
Article
Recent government grants should help the U.S. build a lithium-ion production infrastructure, but it will not happen without a lot of design effort.
2009-09-15
Article
NVH performance is exceptional on this new 6.7-L OHV medium-truck diesel, which benefits from clever packaging, innovative emissions control, and robust overall design.
2011-03-24
Article
5:00 p.m. Wednesday March 23, Indianapolis: I always say, you can judge the effectiveness of any professional conference by how much of the audience remains during the last hour. No matter how riveting the final panel, the attendees are usually yawning by 3 p.m.
2011-04-01
Article
The dozen technical papers related to the Chevrolet Volt submitted by GM and published by SAE International this year are a milestone in the tech-paper realm.
2011-06-07
Article
A new family of 3-cylinder EcoBoost engines, a new 8-speed planetary automatic, an in-house-developed e-CVT, and a flurry of enabling technologies show Ford's seriousness in meeting tough new fuel efficiency regs.
2011-08-08
Article
Top powertrain execs discuss strategies for meeting 54.5 mpg at the 2011 Management Briefing Seminars.
2010-11-24
Article
The impact of the 2008-2009 global recession on corporate R&D spending–and how reduced R&D outlays affected financial performance–is the subject of a study released recently by Booz & Co. For its 2010 Global Innovation 1000, the consulting firm analyzed R&D spending by the world's top 1000 public corporations in 2009 to assess the link between innovation and corporate performance.
2010-12-03
Article
Revealed at the 2010 LA Auto Show, the crossover is a close relation of the Cadillac SRX, using General Motors’ Theta Premium platform. Chassis systems include Saab’s XWD all-wheel drive and electronically controlled limited slip differential (eLSD) with Haldex multi-plate clutch to vary front-to-rear wheel torque delivery.
Viewing 1 to 30 of 102

Filter

  • Range:
    to:
  • Year: