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Development of Cooling Fan Model and Heat Exchange Model of Condenser to Predict the Cooling and the Heat Resistance Performance of Vehicle

Honda R&D Co., Ltd.-Yuichi Fukuchi, Kunihiko Yoshitake, Kazutaka Yokota
  • Technical Paper
  • 2020-01-0157
To be published on 2020-04-14 by SAE International in United States
The cooling performance and the heat resistance performance of commercial vehicle are balanced with aerodynamic performance, output power of power train, styling, the location of sensors, cost and many other parameters. Therefore, it is desired to predict the cooling performance and the heat resistance performance with high accuracy at the early stage of development. Three forms of heat transfer consist of conduction, convection and radiation. Among of these components, it is sometimes difficult to solve the thermal conduction accurately, because to prepare accurate shape and properties needs lots of time and efforts at the early stage of development. Therefore, the cooling performance of heat exchangers and the air temperature distribution in the engine compartment are predicted to access the cooling and the heat resistance performance of vehicle at the preliminary design stage. The air temperature distribution is dominated by the distribution of heat radiation on heat exchangers, the flow distribution which is produced by fans and thermal convection at the surface of parts in the engine compartment. For the case of middle or high vehicle…
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Development of Intercooler Hose for Future Engine

Hino Motors, Ltd.-Ryoji Kodama, Takahiro Onishi
  • Technical Paper
  • 2020-01-0236
To be published on 2020-04-14 by SAE International in United States
Current intercooler hoses, which are made from fluorocarbon rubber (FKM) and silicone rubber (VMQ) exhibit high heat resistance and durability. However, they will be used in more severe use environments, and there is a risk of problems arising with their current material composition. This investigation into issues concerning intercooler hoses in future engines found that FKM mechanical properties were insufficient under high temperature environments. In this research, efforts to improve the mechanical properties of FKM focused on the low durability of the internal FKM crosslinking points as the cause of this insufficiency. The current crosslinking method has excellent acid resistance and cannot be modified. An effective improvement the properties was therefore sought by adding a new distinct crosslinking network while preserving the current level of acid resistance of the existing network. Carbon black gel was used as a reinforcing agent to form the new network. Polymer types and blending were adjusted to achieve the target values and develop a new FKM, which was used to make a prototype hose and confirmed to be free of…
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A Fast Modeling Approach for Prediction of SCR Deposits – Implementation and Validation with Advanced Optical Techniques

Vienna University of Technology-Uladzimir Budziankou, Max Quissek, Thomas Lauer
  • Technical Paper
  • 2020-01-0358
To be published on 2020-04-14 by SAE International in United States
The permanently tightening emission regulations for NOx pollutants force further development of automotive exhaust aftertreatment systems with selective catalytic reduction (SCR). Of particular interest is the long-term reliability of SCR-systems with regard to unfavorable operating conditions, such as high injection rates of urea water solution (UWS) or a low exhaust gas temperature. Both of them may lead to formation of solid deposits which decrease system efficiency by increasing backpressure and impairing ammonia uniformity. A fast modeling approach for numerical prediction of deposit formation in urea SCR systems is desired for optimization of system design. This paper presents a modified Smith´s methodology for the modeling of deposit formation risk. A new criterion for determination of the initial foot print of the spray, where the deposit formation is inhibited, is proposed. The threshold values for the evaluation of the liquid film dynamic were validated based on experimental results. Furthermore, for a better prediction of the liquid film pathways, a new approach for realistic modeling of the film viscosity was developed. To achieve a more realistic simulation in…
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Development of Three-way Catalysts with Advanced Coating Layer

Cataler Corporation-Minoru Ito, Shunsuke Oishi, Takuya Okuda
Toyota Central R&D Labs., Inc.-Akira Morikawa
  • Technical Paper
  • 2020-01-0653
To be published on 2020-04-14 by SAE International in United States
In order to protect the atmospheric environment, further improvement of catalyst performance is required. On the other hand, from the viewpoint of resource risk, it is necessary to reduce the amount of precious metal used as active sites of the catalyst. Therefore, we have developed a high performance three-way catalyst with advanced coating layer to achieve the reduction of precious metal usage. In recent years, fuel efficiency improvement technologies such as a high compression ratio and a large amount of Exhaust Gas Recirculation (EGR) have attracted attention. These technologies generally tend to increase the ratio of HC to NOx in exhaust gas. In order to improve the HC purifying activity of the catalyst, we focused on the Pd loading depth in the coating layer. By controlling the loading depth on the surface of the coating layer, Pd with high HC purification activity is easily in contact with exhaust gas. And it became possible to purify efficiently even under high Space Velocity (SV) conditions. Subsequently, we focused on the coating structure to maximize purifying activity and…
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Advancements in Thermoplastic Optical Materials for Automotive Lighting Systems

Arkema Inc.-Altuglas International-Brian Cromer, Laura Thoma, Noah Macy, Charles Rissel
  • Technical Paper
  • 2020-01-0634
To be published on 2020-04-14 by SAE International in United States
Optical materials strongly influence the performance and efficiency of automotive lighting systems. In particular, LED signature headlight design motifs such as dispersion optics and light pipes comprise long optical path lengths, which require homogeneous color distribution and light extraction with minimal attenuation. Unfortunately, conventional thermoplastic optical materials are not suitable for long path length (LPL) applications, as they often lack sufficient light transmission, absorption coefficient and/or heat resistance for LPL optics. In this presentation, we will demonstrate strategies to maximize performance and efficiency of automotive lighting systems, using new acrylic resins optimized for LPL optics. Through practical examples, we will show how strategic improvements to absorption coefficient and spectral uniformity significantly reduce light attenuation, while increasing power efficiency and color uniformity in LPL optics. Additionally, we will outline thermal and physical material properties relevant to the design, engineering, and manufacturing of thermoplastic LPL optics. Finally, we will discuss the importance of outdoor stability, UV-weathering resistance, and chemical resistance for maintaining efficient long-term performance, and in the case of signature lighting, preserving the vehicle brand identity…
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Aerospace Standard Test Methods for Aerospace Sealants Two-Component Synthetic Rubber Compounds

AMS G9 Aerospace Sealing Committee
  • Aerospace Standard
  • AS5127/1D
  • Current
Published 2020-03-18 by SAE International in United States
This SAE Aerospace Standard (AS) describes test methods to determine the application and performance properties of two-component sealing compounds. It shall be used in conjunction with AS5127 and the applicable material specification. When modifications to these test methods are called out in material specifications, the material specification shall take precedence.
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Fittings, 37 Degree Internal Flare, Fluid Connection, Procurement Specification

G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
  • Aerospace Standard
  • AS4841C
  • Current
Published 2020-03-10 by SAE International in United States
This SAE Aerospace Standard (AS) establishes the requirements for 37 degree flared tube fittings or machined internal cone fluid connection fittings for use with 37 degree external cone, spherical nose, and seal ring fittings in all types of aerospace fluid systems (see Section 6).
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Hot Plate Method for Evaluating Heat Resistance and Thermal Insulation Properties of Materials

Acoustical Materials Committee
  • Ground Vehicle Standard
  • J1361_202003
  • Current
Published 2020-03-04 by SAE International in United States
This test method is applicable for rating various materials, such as automotive trim materials and insulation composites, for their ability to resist heat transfer, heat degradation, odor, smoking, and exothermic reaction under prescribed temperature.
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Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 60.5Ni - 23Cr - 14Fe - 1.4Al Annealed

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5715G
  • Current
Published 2020-02-17 by SAE International in United States
This specification covers a corrosion and heat-resistant nickel alloy in the form of bars, forgings, and flash welded rings 4.00 inches (101.6 mm) and under in least nominal cross section, and stock of any size for forging or flash welded rings (see 8.5).
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Steel, Corrosion Resistant, Sheet and Strip 18Cr - 8Ni (SAE 30301) Cold Rolled, 185 ksi (1276 MPa) Tensile Strength

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5519P
  • Current
Published 2020-02-14 by SAE International in United States
This specification covers a corrosion-resistant steel in the form of sheet and strip 0.005 inch (0.13 mm) and over in nominal thickness (see 8.7).
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