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Inspection and Maintenance of In-Use Motor Vehicles – Mitigating Environmental impact

International Centre For Automotive Tech-Aditya Gautam
International Centre For Automotive Tech.-Vijayanta Ahuja
  • Technical Paper
  • 2019-28-2427
To be published on 2019-11-21 by SAE International in United States
The existing rule no. 62 of CMVR, 1989 applies to various commercial vehicles and yet is unable to provide a promising template to have a concise format which will cover all the motor vehicles and their different components with more precise equipment plus virtual testing along with proper management of time during the bulk inspection of all the vehicles. This paper will include all the technicalities and the different course of actions which must be taken into account for the proper implementation of the desired regulations on the designated concern. The idea behind this paper is to have a compact procedural document for the periodical inspection and maintenance of all the motor vehicles running on the Indian Roads that adhere to the basic safety concerns of other on-road vehicles, the pedestrians and the surroundings. Concluding the fact that there are various aspects of environmental degradation henceforth we start by picking one of the hazards trying to execute a method to resolve every respective issue on a micro level, thus eliminating maximum threats onto the environment.…

Development of a Hybrid Power Unit for Formula SAE Application: ICE CFD-1D Optimization and Vehicle Lap Simulation

UNIMORE-Enrico Mattarelli, Carlo Alberto Rinaldini, Francesco Scrignoli, Valerio Mangeruga
  • Technical Paper
  • 2019-24-0200
To be published on 2019-09-09 by SAE International in United States
The paper reviews the CFD optimization of a motorcycle engine, modified for the installation in a hybrid powertrain of a Formula SAE car. In a parallel paper [Development of a hybrid power unit for Formula SAE application: packaging optimization and thermo-mechanical design of the electric motor case], the choice of the donor engine (Ducati 959 “Panigale”) is thoroughly discussed, along with all the hardware modifications oriented to minimize the new powertrain dimensions, weight and cost, and guarantee the mechanical reliability. In the current paper, the attention is focused on two main topics: 1) CFD-1D tuning of the modified Internal Combustion Engine (ICE), in order to comply with the Formula SAE regulations, as well as to maximize the power output; 2) Simulation of the vehicle in racing conditions, comparison between a conventional and a hybrid powertrain

Numerical Study of Pore Size and Distribution Effects on Gasoline Particulate Filter Performance

SAE International Journal of Engines

Texas A&M University, USA-Pengze Yang
University of Wisconsin-Madison, USA-Andrea Strzelec
  • Journal Article
  • 03-12-05-0032
Published 2019-08-22 by SAE International in United States
The improved brake thermal efficiency of Gasoline Direct Injection (GDI) engines is accompanied by a significant increase in Particulate Matter (PM) mass and higher Particulate Number (PN) emissions as compared to (multi)Port Fuel Injected (PFI) engines. Gasoline particulate filters (GPFs) with high filtration efficiency and low backpressure will be required to meet the future, stringent PM/PN regulations. A two-dimensional (2D) CFD study was performed to determine the effects of pore size and distribution on the interdependent performance parameters of filtration efficiency and backpressure for clean GPFs. Simulation results show an on linear change infiltration efficiency as the pore size distribution tightens and determine a recommended distribution range, controlling the quantity of small-sized pores. Pore size distributions beyond this recommended range can cause a filtration performance loss or intolerable backpressure penalty for the GPF. In addition, a recent collaborative publication from our group has demonstrated our ability to create a hierarchical porous filter, with variable pore size in each layer. Knowing that filtration efficiency and pressure drop increase as the average pore size decreases offers inspiration…

Recommended Practice for an Engineering Analysis for A/C Efficiency Credits

Interior Climate Control Vehicle OEM Committee
  • Ground Vehicle Standard
  • J3174_201907
  • Current
Published 2019-07-18 by SAE International in United States

Under U.S. GHG and CAFE regulations, manufacturers are required to perform confirmatory testing to validate indirect air conditioning credits (refer to 40 CFR 86.1868-12). The purpose of this Reccomended Practice is to provide manufacturers with updated criteria for the 2020 and later model years.


Contact, Wire Barrel, Crimp Type

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS5261A
  • Current
Published 2019-07-11 by SAE International in United States
This specification provides dimensional standards for crimp type contact wire barrel design and is a replacement for MS3190. Some wire barrel designs may exist in AS39029 but are not considered approved for future use, therefore, will not appear in this specification. The crimp barrel sizes listed in this document have been standardized in AS39029 and AS22520 specifications, tools and contacts are available to support these listed sizes. These crimp barrel requirements shall be used for any contact, regardless of whether it is a standard or non-standard contact configuration. The specification lists details for three types of wire barrels: A, B, and C. Wire barrel type A is not recommended for new design. Table 4 lists each AS39029 detail sheet wire barrel type.
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Why Cloud QMS Better Supports Regulatory Compliance

  • Magazine Article
  • TBMG-34806
Published 2019-07-01 by Tech Briefs Media Group in United States

Companies regulated by the U.S. Food and Drug administration (FDA) need to establish current good manufacturing practices (CGMPs) as part of Title 21 CFR part 820 requirements. This includes creation of quality systems to ensure development of safe and effective devices. More specifically, medical device manufacturers must establish methods and procedures to design, produce, and deliver devices that meet the quality system standard.1


Nut, Floating, Attached Retention Element (A.R.E.) - Hole Dimensions and Installation Requirements

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS5133A
  • Current
Published 2019-07-01 by SAE International in United States
This specification establishes the procedure for installing self-locking, floating, attached retention element (A.R.E.) nut assemblies and defines the necessary hole preparation.
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Polyamide Type 6-6, Plastic Moldings and Extrusions

AMS P Polymeric Materials Committee
  • Aerospace Material Specification
  • AMS3617F
  • Current
Published 2019-06-13 by SAE International in United States
This specification covers one type of Polyamide Type 6-6 (nylon) thermoplastic resin in the form of moldings and extrusions.
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Uncertainty of the Ice Particles Median Mass Diameters Retrieved from the HAIC-HIWC Dataset: A Study of the Influence of the Mass Retrieval Method

Delphine Leroy
Airbus-Alice Grandin, Fabien Dezitter
Published 2019-06-10 by SAE International in United States
In response to the ice crystal icing hazard identified twenty years ago, aviation industry, regulation authorities, and research centers joined forces into the HAIC-HIWC international collaboration launched in 2012. Two flight campaigns were conducted in the high ice water content areas of tropical mesoscale convective systems in order to characterize this environment conducive to ice crystal icing. Statistics on cloud microphysical properties, such as Ice Water Content (IWC) or Mass Median Diameter (MMD), derived from the dataset of in situ measurements are now being used to support icing certification rulemaking and anti-icing systems design (engine and air data probe) activities. This technical paper focuses on methodological aspects of the derivation of MMD. MMD are estimated from PSD and IWC using a multistep process in which the mass retrieval method is a critical step. Complementary to previous studies reporting on MMD values calculated from the HAIC-HIWC dataset, this paper deals with the uncertainty in MMD by comparing two different approaches for the retrieval of the mass-size (m-D) relationship. The analysis encompasses the data collected in the…
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Process Regulations and Mechanism of WEDM of Combustor Material

SAE International Journal of Aerospace

National Institute of Technology, Kurukshetra, India-Bhupinder Singh, Joy Prakash Misra
  • Journal Article
  • 01-12-01-0004
Published 2019-06-07 by SAE International in United States
This study discusses the experimental investigation on WEDM of combustor material (i.e., nimonic 263). Experimentation has been executed by varying pulse-on time (Ton), pulse-off time (Toff), peak current (Ip), and spark gap voltage (Sv). Material removal rate (MRR), surface roughness (SR), and wire wear rate (WWR) are employed as process performance characteristics. Experiments are designed as per the box-Behnken design technique. Parametric optimization has also been performed using response surface methodology. Besides this, field-emission scanning electron microscope (FE-SEM) and an optical microscope are utilized to characterize WEDMed and worn-out wire surfaces. It is observed that both surfaces contain micro-cracks, craters, spherical droplets, and a lump of debris. Furthermore, the mechanism of recast layer formation has been critically evaluated to apprehend a better understanding of the technique. The key features of the experimental procedure are also highlighted.
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