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A Research on Kinematic Optimization of Auto Flush Door Handle System

Hyundai Motor Group-Jungho Han, Kyoungtaek Kwak, Jinwoo Nam, Oktae Jung, Jinsang Chung
  • Technical Paper
  • 2020-01-0623
To be published on 2020-04-14 by SAE International in United States
Today, many car manufacturers and their suppliers are very interested in power-operated door handles, known as auto flush door handles. These handles have a distinguishing feature in terms of the way they operate. They are hidden in door skins and deployed automatically when users need to open the door. It is obvious that it is a major exterior styling point that makes customers interested in the vehicles that apply it. To make this auto flush door handle, however, there lie difficulties. First, because there is no sufficient space inside a door, applying these handles can be a constraint in exterior design unless the structures of them are kinematic optimized. The insufficient space can also cause problems in appearance of the handles when they are deployed. The purpose of this study is to establish the kinematic system of auto flush door handle to overcome the exterior handicaps such as the excessive exposure of the internal area on the deployed position. In order to resolve these issues, the Scott-Russell mechanism is applied to the auto flush handle…
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N&V Component Structural Integration and Mounted Component Durability Implications

General Motors LLC-Mark Stebbins, Joseph Schudt
  • Technical Paper
  • 2020-01-1396
To be published on 2020-04-14 by SAE International in United States
Exterior component integration presents competing performance challenges for balanced exterior styling, safety, ‘structural feel’ [1] and durability. Industry standard practices utilize noise and vibration mode maps and source-path-receiver [2] considerations for component mode frequency placement. This modal frequency placement has an influence on ‘structural feel’ and durability performance. Challenges have increased with additional styling content, geometric overhang from attachment points, component size and mass, and sensor modules. Base excitation at component attachment interfaces are increase due to relative positioning of the suspension and propulsion vehicle source inputs. These components might include headlamps, side mirrors, end gates, bumpers and fascia assemblies. Here, we establish basic expectations for the behavior of these systems, and ultimately consolidate existing rationales that are applied to these systems. We consider a simple two degree-of-freedom system subject to a base excitation consisting of masses attached via springs and dampers. Component mode decoupling, vibration amplification and basic design guidance relationships are suggested.
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Aerodynamic Sensitivity Analysis of Tire Shape Factors

Nissan Motor Co., Ltd.-Sena Kurachi, Hideyuki Kawamata, Kenichi Hirose, Munehiko Oshima, Shuji Suzuki
  • Technical Paper
  • 2020-01-0669
To be published on 2020-04-14 by SAE International in United States
It is well known that the wheels and tires account for approximately 25% of the overall aerodynamic drag of a vehicle. This is because the contribution of the tires to aerodynamic drag stems from not only aerodynamic drag itself directly caused by exposure to the main flow (tire CD), but also from aerodynamic drag indirectly caused by the interference between tire wakes and the upper body flow (body CD). In the literature, as far as the authors are aware, there have been no reports that have included the following all four aspects at once: (1) CD sensitivity to detailed tire shape factors; (2) CD sensitivity differences due to different vehicle body types; (3) CD sensitivity for each aerodynamic drag component, i.e., tire CD and body CD; (4) Flow structure and mechanism contributing to each aerodynamic drag component. The purpose of this study was to clarify CD sensitivity to tire shape factors for tire CD and body CD considering two different vehicle body types, sedan and SUV. In wind tunnel testing, many tire configurations were prepared…
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Engine Sound Design Process with Utilization of Industrial Styling Design

Honda R&D Co., Ltd.-Takashi Kondo, Seiji Hara, Kenji Torii, Koichi Yoshioka, Tatsunori Tsuruta, Motoyasu Sakaguchi, Masaya Miyazawa
  • Technical Paper
  • 2020-01-0402
To be published on 2020-04-14 by SAE International in United States
This report will introduce a new engine sound design concept and propose a design process.In sound design for automotive development of popular vehicles, it is common to seek to enhance the state of the existing marketed vehicle in order to meet further demands from customers. For standout models such as sports vehicles and flagship vehicles, sound design commonly reflects the sound ideals of the manufacturer’s branding or engineers. Each case has common point that the sound direction is determined by itself clearly. However, in this way, it is difficult to create abstract concept sound. Because it is no direction for the sound.Therefore, this paper examines ways to achieve a new sound that satisfies a sound concept based on an unprecedented abstract concept “wood”. The reason why sound concept is “wood”, it is the difficult to make as a new engine sound and good study to reveal usefulness of new sound design process.Therefore, the authors devised a new sound design process that would be necessary to design abstract concept sounds. The original sound design process was…
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Chevy reveals 2020 Corvette Stingray convertible, C8.R racer

Automotive Engineering: November/December 2019

Bill Visnic
  • Magazine Article
  • 19AUTP11_14
Published 2019-11-01 by SAE International in United States

Reinforcing the Corvette's long association with astronauts, Chevrolet unveiled the convertible version of its all-new, mid-engine-layout 2020 Corvette Stingray in Cape Canaveral in early October. Executive chief engineer Tadge Juechter, underscoring the car's no-compromises performance and comparatively affordable price, called it a “no-lose proposition” for enthusiasts considering the new Corvette but also desiring a more open-top experience. When it goes into production in the first quarter of 2020, the Corvette Stingray convertible will start at $67,495 - $7,500 more than the 2020 Stingray coupe, which was widely celebrated for its aggressive $59,995 base price.

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Wheel and Wheel Trim Weathering Testing for Paint Coatings

Wheel Standards Committee
  • Ground Vehicle Standard
  • J2633_201910
  • Current
Published 2019-10-21 by SAE International in United States
This SAE lab test procedure should be used when performing the following specialized weathering tests for wheels; Florida Exposure, QUV, Xenon and Carbon Weatherometer. In addition to these procedures, some additional post-weathering tests may be specified. Please refer to customer specifications for these requirements.
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Optimization of IP Duct Vane Articulation for Improved Cabin Airflow Directivity

Mahindra & Mahindra, Ltd.-Kumar Raju
Mahindra Research Valley-Subramaniyan Baskar, Nagarajan Gopinathan, Paradarami Udaya Kumar
Published 2019-10-11 by SAE International in United States
The air velocity achieved at driver and passenger aim point is one of the key parameters to evaluate the automotive air-conditioning system performance. The design of duct, vent and vanes has a major contribution in the cabin air flow directivity. However, visual appearance of vent and vane receives higher priority in design because of market demand than their performance. More iterations are carried out to finalize the HVAC duct assembly until the target velocity is achieved. The objective of this study is to develop an automated process for vane articulation study along with predicting the optimized velocity at driver and passengers. The automated simulation of vane articulation study is carried out using STAR-CCM+ and SHERPA optimization algorithm which is available in HEEDS tool. The minimum and maximum vane angle are defined as parameters and face level velocity is defined as response. Depending on the optimization technique and number of iterations defined in HEEDS, the vane angle will get updated and the design iterations proceeds automatically till the number of iterations are met. The obtained results…
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Long time coming

Automotive Engineering: June 2019

Don Sherman
  • Magazine Article
  • 19AUTP06_06
Published 2019-06-01 by SAE International in United States

After six decades of teasing enthusiasts with intriguing concepts, Chevrolet is launching an all-new Corvette with its engine located where Zora intended-behind the driver.

In the Spring of 1957, while pondering the demise of Chevrolet's Corvette Super Sports racer at Sebring's 12-hour endurance race, legendary Corvette godfather Zora Arkus-Duntov concluded, “Heat source must be behind driver.” The official explanation offered for dropping out after 29 laps was a failed rear-suspension bushing-but the actual show-stopper was that driver John Fitch's feet were being cooked by the exhaust-header pipes snaking around the SS's sheet magnesium ‘firewall.’

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New design for 2020 Mitsubishi Outlander Sport as brand awaits alliance's new platforms, products

Automotive Engineering: June 2019

Paul Seredynski
  • Magazine Article
  • 19AUTP06_16
Published 2019-06-01 by SAE International in United States

The 2020 Mitsubishi Outlander Sport carries over with no mechanical changes compared to the 2019 model. But its new face-part of a front/rear styling redo plus new interior trims/tech for the 5-seat, 2-row SUV-signals a new start for the brand in the U.S. Having pared its product lineup to all-SUV plus the economy minded B-segment Mirage, the triple-diamond brand is saucing up its styling while it awaits a bevy of new platforms and products from its alliance with Nissan/Renault.

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AV ‘Goiters’ Be Gone!

Autonomous Vehicle Engineering: May 2019

Lindsay Brooke
  • Magazine Article
  • 19AVEP05_12
Published 2019-05-01 by SAE International in United States

Magneti Marelli's ‘Smart Corner’ technology aims to reduce cost, complexity and mass by integrating key vehicle sensors seamlessly into a vehicle's lighting modules.

Warts. Bumps. Blisters. Protuberances. These and other less-flattering terms are used by vehicle designers and engineers to describe the bulging, non-integrated sensor placement that has become the unfortunate visual signature for automated vehicles (AVs).

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